УСТРОЙСТВО ОПТИЧЕСКОГО ПРИЕМОПЕРЕДАТЧИКА И СИСТЕМА ПАССИВНЫХ ОПТИЧЕСКИХ СЕТЕЙ С МУЛЬТИПЛЕКСИРОВАНИЕМ С РАЗДЕЛЕНИЕМ ПО ДЛИНЕ ВОЛНЫ

Изобретение относится к технике связи и может использоваться в системах оптической связи. Технический результат состоит в повышении пропускной способности. Для этого устройство включает активную среду, фотоэлектрический преобразователь, дифракционную решетку AWG и зеркало с частичным отражением. AWG включает в себя два общих порта и множественные порты ветвления. Один из общих портов функционирует в качестве порта отправки сигнала, а другой - в качестве порта приема сигнала, причем ширина полосы порта отправки сигнала является меньшей, чем ширина полосы порта приема сигнала. Активная среда и фотоэлектрический преобразователь подключены к одному из портов ветвления AWG. AWG и зеркало с частичным отражением выполнены с возможностью совместного выполнения синхронизации с самоинжекцией длины волны на оптическом сигнале, обеспеченном активной средой. AWG дополнительно выполнена с возможностью демультиплексирования оптического сигнала, принятого портом приема сигнала, для некоторого порта ветвления ...

ИНДИКАЦИЯ ДЛИНЫ ВОЛНЫ В ПАССИВНЫХ ОПТИЧЕСКИХ СЕТЯХ С МНОЖЕСТВОМ ДЛИН ВОЛН

... 1. Устройство пассивной оптической сети (PON), содержащее:компонент терминала оптической линии (OLT), выполненный с возможностью соединения с элементом оптической сети (ONU) и отправки идентификации длины волны нисходящей линии связи в ONU для указания длины волны, которая соответствует ONU,причем идентификация длины волны нисходящей линии связи передается с использованием кадра уровня управления доступом к среде передачи (MAC) для встроенного канала, канала управляющих сообщений или канала данных.2. Устройство по п. 1, в котором компонент терминала OLT дополнительно выполнен с возможностью приема обратной связи в отношении длины волны по восходящей линии связи от ONU, указывающей длину волны, которая соответствует ONU, и причем обратная связь в отношении длины волны по восходящей линии связи передается с использованием второго кадра уровня MAC.3. Устройство по п. 2, в котором идентификация длины волны нисходящей линии связи передается, когда ONU назначен определенный канал нисходящей линии ...

ОКОНЕЧНОЕ УСТРОЙСТВО ОПТИЧЕСКОЙ СЕТИ СТОРОНЫ СТАНЦИИ, ОКОНЕЧНОЕ УСТРОЙСТВО ОПТИЧЕСКОЙ СЕТИ СТОРОНЫ АБОНЕНТА И СИСТЕМА ОПТИЧЕСКОЙ СВЯЗИ

... 1. Оконечное устройство оптической сети стороны станции, в котором: к одному светоизлучающему блоку присоединены: первый блок обработки, который осуществляет процесс вывода оптического сигнала посредством указанного светоизлучающего блока на одной скорости передачи, и второй блок обработки, который осуществляет процесс вывода оптического сигнала посредством указанного светоизлучающего блока на другой скорости передачи. 2. Оконечное устройство оптической сети стороны станции по п.1, содержащее: блок управления тактом, который управляет первым блоком обработки и вторым блоком обработки посредством одинакового такта. 3. Оконечное устройство оптической сети стороны станции по п.2, содержащее: блок измерения расстояния, который измеряет расстояние до оконечного устройства оптической сети стороны абонента; и блок регулирования оптического вывода, который регулирует оптический вывод светоизлучающего блока на основании результата измерения, полученного посредством блока измерения расстояния. 4.

НАБЛЮДЕНИЕ ЗА ОПТИЧЕСКИМИ СЕТЯМИ С МУЛЬТИПЛЕКСИРОВАНИЕМ С РАЗДЕЛЕНИЕМ ПО ДЛИНЕ ВОЛНЫ

... 1. Устройство в узле (200) в пассивной оптической сети с мультиплексированием с разделением по длине волны, WDM-PON, для выполнения наблюдения за WDM-PON, причем устройство содержит:- X делителей (211-214) с коэффициентом деления 1:Y, причем каждый делитель имеет один вход и Y выходов, так что X*Y равно N, при этом X, Y, N являются целыми числами, при этом один вход каждого из X делителей выполнен с возможностью принимать сигнал оптической рефлектометрии во временной области, OTDR, и разделять принимаемый OTDR-сигнал на Y OTDR-субсигналов, так что всего N OTDR-субсигналов выводятся из X делителей,- решетку (230) на основе массива волноводов, AWG, N*N, и- первый фильтр (220), выполненный с возможностью смешивать сигнал фидера, содержащий передачу данных из терминала (151) оптической линии, OLT, с одним из N OTDR-субсигналов,- при этом один вход AWG выполнен с возможностью принимать смесь сигнала фидера и одного OTDR-субсигнала, и каждый из оставшихся N-1 входов AWG выполнены с возможностью ...

ОПТИЧЕСКОЕ ЛИНЕЙНОЕ ОКОНЕЧНОЕ УСТРОЙСТВО, ОПТИЧЕСКИЙ СЕТЕВОЙ БЛОК И СИСТЕМА ПАССИВНОЙ ОПТИЧЕСКОЙ СЕТИ

... 1. Оптическое линейное оконечное устройство (OLT), содержащее: оптический модуль, модуль восстановления тактовых сигналов и данных, микросхему управления доступом к среде и управляющий модуль, причем:оптический модуль выполнен с возможностью приема данных восходящего потока, отправленных оптическими сетевыми блоками (ONU) с различными скоростями передачи и отправки указанных данных восходящего потока на модуль восстановления тактовых сигналов и данных;модуль восстановления тактовых сигналов и данных выполнен с возможностью приема данных восходящего потока, восстановления тактового сигнала в соответствии с этими данными восходящего потока и отправки указанных данных восходящего потока и тактового сигнала, соответствующего этим данным восходящего потока, на микросхему управления доступом к среде;микросхема управления доступом к среде выполнена с возможностью сохранения указанных данных восходящего потока и тактового сигнала, соответствующего этим данным восходящего потока;управляющий модуль ...

СПОСОБ И УСТРОЙСТВО ДЛЯ ОБНАРУЖЕНИЯ БЛОКА ОПТИЧЕСКОЙ СЕТИ И СИСТЕМА ПАССИВНОЙ ОПТИЧЕСКОЙ СЕТИ

... 1. Способ обнаружения блока оптической сети (ONU), содержащий этапы, на которых:обнаруживают идентификационный код блока ONU в открытом пустом окне восходящей линии связи или пустом временном интервале; иопределяют, в соответствии с идентификационным кодом блока ONU, что блок ONU, соответствующий идентификационному коду блока ONU, является ненадежным блоком ONU.2. Способ по п.1, в котором:идентификационный код блока ONU предварительно конфигурируется и передается посредством оптического модуля блока ONU; или идентификационный код блока ONU получается и передается посредством оптического модуля блока ONU от управляющего модуля блока ONU в течение неразрешенного времени.3. Способ по любому из пп.1 и 2, в котором:идентификационный код блока ONU является конкретным последовательным кодом оптического канала, который идентифицирует блок ONU.4. Блок оптической сети (ONU), содержащий оптический модуль, который содержит:блок получения, сконфигурированный для получения идентификационного кода блока ...

Verfahren und Netzwerk zur Kommunikation über optische Fasern mit Frequenzmultiplex.

Optical broadband information transmission system for communications - transmits range of TV signals via multiplexing central station over optical line to subscriber units

An optical transmission system has a central unit (2) coupled over an optical fibre network (3) to a number of distributed units (4). The central unit includes a multiplexer (6) with its output connected to a voltage-to-optical converter (7). The multiplexer receives a number of TV signals and signals are relayed by optical amplifiers (8). The transmitted signals are received by units (10) having HDTV, TV and multi-medium equipment (12, 13, 14). The optical signals are passed through converters (11, 15). The multi-medium unit is a bidirectional communication unit and signals are passed via a coupler (17) and converters to a distribution stage (5). USE/ADVANTAGE- Allows bidirectional transfer over optical link. Can be used for compressed HDTV signals.

KOMMUNIKATIONSSYSTEM MIT STERN / RING TOPOLOGY

Schnelle Schutzumschaltung durch Überwachung von Abwärtssignalen in einem optischen Netzwerk

A quantum communication network

Digital communication network architecture for providing universal information services

A switched integrated wideband and narrowband multiservices digital network (FIGS. 1 and 2) is an ISDM providing universal information services based on wideband and narrowband voice, data, and video communications. It comprises a plurality of service areas (100, 101), each served by a central switching node (110). The central node is connected to a plurality of remote nodes (103) by feeder optical fibers (107) and a control bus extension (106). Network interface equipment (104) at subscribers' (102) premises is connected to remote nodes by distribution optical fibers (105). Each distribution fiber is wavelength-division multiplexed and carries modulated (pulse-analog, pulse-code, or differential pulse-code) wideband digital channels (205) and a multiplexed channel (206) comprising 32 time-division-multiplexed narrowband digital channels (207). One narrowband channel (207D) carries all signaling messages. Feeder fibers are wavelength-division multiplexed and carry modulated wideband digital ...

DISTRIBUTION SYSTEM FOR A LOCAL AREA NETWORK

Mirrored passive optical access network

CABLE TELEVISION BACK CONNECTING SYSTEM WITH SIDEBAND COMMUNICATION CHANNELS OF HIGH DATA RATE

PROCEDURE AND DEVICE FOR THE DATA PROCESSING IN A UDWDM NETWORK AND COMMUNICATION SYSTEM WITH A SUCH DEVICE

PASSIVE OPTICAL TELECOMMUNICATION SYSTEM

OPTICAL TRANSMISSION OF NEWS SYSTEM IN THE PARTICIPANT EXCHANGE AREA.

DEVICE FOR A PASSIVE AN OPTICAL NETWORK

WDM OPTICAL TRANSMISSION SYSTEM WITH PASSIVE HUB

Edfl multiple wavelength laser source

Multiple wavelength laser source

Optical-inclusive dwdm local area network

Local access fiber optics communication system

WDM network with control wavelength

Optical communications system with dynamic channel allocation

System and method for communicating optical signals upstream and downstream between a data service provider and subscribers

System and method providing a separate control channel for a wavelength divisionmultiplexed network

OPTICAL TRANSMITTER SYSTEM

An optical transmitter system for supplying a plurality of different wavelength optical radiation components (.lambda.1 to .lambda.n) to a transmission element (2), which, in operation, is connected to the transmitter system for conveying the different wavelength radiation components to a respective receiver (11), is disclosed. The transmitter system comprises means for detecting a loss of a wavelength radiation component at the respective receiver (11) and means (9) for interrupting the supply of the wavelength component in response to a detection of loss of the wavelength component at the receiver. The transmitter system is characterised by timing means (10) capable of providing respective restart times (t1 to tn) which differ one to another for the wavelength radiation components, and means (9) for restarting the supply of the wavelength component, following an interruption, at the restart time provided by the timing means.

PASSIVE OPTICAL NETWORK SYSTEM FOR THE DELIVERY OF BI-DIRECTIONAL RF SERVICES

A system for providing bi-directional RF services over relating to a point-to-multipoint Passive Optical Network (PON).

"SMART" RF OVER GLASS (RFOG) CPE UNIT WITH SEAMLESS PON UPGRADE CAPABILITY

Methods and apparatus are described for "Smart" RF over Glass (RFoG) CPE Unit with Seamless PON Upgrade Capability. A method includes operating a customer premises equipment device including transporting upstream cable return services with a laser; and switching a drive source for the upstream laser from an analog driver to a digital driver by using a managed electrical switch to reuse a wavelength of the laser. An apparatus includes a customer premises equipment device including a laser for transporting upstream cable return services; and a managed electrical switch coupled to the laser that is used to switch a drive source for the upstream laser to reuse a wavelength of the laser.

FTTH RF OVER GLASS (RFOG) ARCHITECTURE AND CPE

Methods and apparatus are described for fiber-to-the-home (FTTH) RF over Glass (RFoG) Architecture and customer-premise-equipment (CPE). A method includes up-converting a baseband upstream data signal to a frequency band above a frequency band of a baseband downstream data signal; combining the up-converted upstream data signal with an upstream cable return; transmitting the up-converted upstream data signal and the upstream cable return using a single upstream laser; separating the frequency up-converted data signal from the upstream cable return using an RF diplexer; and down-converting the frequency up-converted upstream data signal back to baseband. An apparatus comprises: a frequency up-converter that up-converts a baseband upstream data signal to a frequency band above a frequency band of a baseband downstream data signal; a frequency combiner coupled to the frequency up-converter that combines the up-converted upstream data signal with an upstream cable return; a single upstream ...

DYNAMIC BANDWIDTH ALLOCATION APPARATUS AND METHOD AND OPTICAL LINE TERMINAL IN PON SYSTEM

A dynamic bandwidth assignment device (12) is equipped in a PON system optical line terminal (1) which, for example, relays upstream frames (F1, F2) received from optical network units (2) to higher networks (6). Based on the reception rates of upstream frames (F1, F2) from the optical network units (2), the transmission rates of the relay destinations of the upstream frames (F1, F2), and the changes in the amounts of data generated at the time of relay of the upstream frames (F1, F2), this dynamic bandwidth assignment device (12) calculates an assigned maximum bandwidth (max_bw) at which relay of the upstream frames (F1, F2) is possible even when those amounts of data increase, and dynamically assigns the amount of upstream transmission of each optical network unit (2), within the calculated assigned maximum bandwidth (max_bw).

DIGITAL COMMUNICATION NETWORK ARCHITECTURE FOR PROVIDING UNIVERSAL INFORMATION SERVICES

... : A switched integrated wideband and narrowband multiservices digital network is an ISDN providing universal information services based on wideband and narrowband voice, data, and video communications. It comprises a plurality of service areas, each served by a central switching node. The central node is connected to a plurality of remote nodes by feeder optical fibers and a control bus extension. Network interface equipment at subscribers' premises is connected to remote nodes by distribution optical fibers. Each distribution fiber is wavelength-division multiplexed and carries modulated (pulse-analog, pulse-code, or differential pulse-code) wideband digital channels and a multiplexed channel comprising time-division-multiplexed narrowband digital channels. One narrowband channel carries all signaling messages. Feeder fibers are wavelength-division multiplexed and carry modulated wideband digital channels, and multiplexed channels each comprising a plurality of time-division-multiplexed ...

SYSTEM AND METHODS FOR COHERENT PON ARCHITECTURE AND BURST-MODE RECEPTION

An optical network communication system utilizes a passive optical network including an optical hub having an optical line terminal, downstream transmitter, an upstream receiver, a processor, and a multiplexer. The upstream receiver includes a plurality of TWDMA upstream subreceivers. The system includes a power splitter for dividing a coherent optical signal from the optical hub into a plurality of downstream wavelength signals, a long fiber to carry the coherent optical signal between the optical hub and the power splitter, and a plurality of serving groups. Each serving group includes a plurality of optical network units configured to (i) receive at least one downstream wavelength signal, and (ii) transmit at least one upstream wavelength signal. The system includes a plurality of short fibers to carry the downstream and upstream wavelength signals between the power splitter and the optical network units, respectively. Each upstream subreceiver receives a respective upstream wavelength ...

SYSTEM AND METHODS FOR DISTRIBUTION OF HETEROGENEOUS WAVELENGTH MULTIPLEXED SIGNALS OVER OPTICAL ACCESS NETWORK

An optical network communication system includes an optical hub, an optical distribution center, at least one fiber segment, and at least two end users. The optical hub includes an intelligent configuration unit configured to monitor and multiplex at least two different optical signals into a single multiplexed heterogeneous signal. The optical distribution center is configured to individually separate the at least two different optical signals from the multiplexed heterogeneous signal. The at least one fiber segment connects the optical hub and the optical distribution center, and is configured to receive the multiplexed heterogeneous signal from the optical hub and distribute the multiplexed heterogeneous signal to the optical distribution center. The at least two end users each include a downstream receiver configured to receive one of the respective separated optical signals from the optical distribution center.

FTTP IP VIDEO OVERLAY

A video overlay system for a Fiber to the Premises (FTTP) optical network. The video overlay is achieved by including a video router with a gigabit Ethernet interface including Internet Group Management Protocol (IGMP) multicasting capability in a headend. The video router transmits unidirectional Internet Protocol video to a plurality of Single Family Unit (SFU) Optical Network Terminations (ONTs) at 1550nm. The SFU ONTs include IGMP snooping (MxU ONT with multicasting) capability and carry bi-directional control signals from Set Top Boxes (STBs) using 1490nm downstream and 1310nm upstream traffic to the headend via an Optical Line Termination (OLT).

TRANSMITTER PHOTONIC INTEGRATED CIRCUITS (TXPIC) AND OPTICAL TRANSPORT NETWORKS EMPLOYING TXPICS

... ²²²A photonic integrated circuit (PIC) chip comprising an array of modulated ²sources, each providing a modulated signal output at a channel wavelength ²different from the channel wavelength of other modulated sources and a ²wavelength selective combiner having an input optically coupled to received ²all the signal outputs from the modulated sources and provide a combined ²output signal on an output waveguide from the chip. The modulated sources, ²combiner and output waveguide are all integrated on the same chip.² ...

OPTICAL PROCESSING SYSTEM

WAVELENGTH DIVISION MULTIPLEXED MULTI-FREQUENCY OPTICAL SOURCE AND BROADBAND INCOHERENT OPTICAL SOURCE

A wavelength division multiplexing multi-frequency optical source is used to provide downstream transmission of information signals at discrete optical wavelengths from a central office to a plurality of optical network units. A passive optical demultiplexer in a remote node routes the downstream information signals to the optical networks according to optical wavelength. Broadband incoherent sources are used to provide upstream information signals at discrete optical wavelengths which are multiplexed and then routed to the central office for demultiplexing by the passive optical demultiplexer. A wavelength selective coupler in the central office and in each optical network unit combines and segregates downstream and upstream signals of different optical wavelengths for routing to a desired destination.

WAVELENGTH-ASSIGNABLE OPTICAL COMMUNICATION SYSTEM

An optical communication system wherein a wavelength used by a terminal for transmission and reception is assigned thereto in accordance with a call request from the terminal. When the terminal makes a call request at a control wavelength, a wavelength control unit selects a wavelength to be used by the calling terminal out of the wavelengths unused on a wavelength-multiplex communication path, and informs the terminal of the selected wavelength at the control wavelength. The terminal adjusts the wavelength of transmitting and receiving circuits to the informed wavelength. As an example of the optical communication system is disclosed a wavelength-sharing optical exchange system. A connection request from a terminal is transmitted through a wavelength-multiplex communication path at a control wavelength. The wavelength is directed through a subscriber line control unit to a network channel control unit. The network channel control unit retrieves a wavelength table contained therein to decide ...

DISTRIBUTIVE COMMUNICATIONS NETWORK

A distributive communications network comprises groups of nodes (11-22, 31-36, 4 1-43, 51) at different levels (1, 2, 3, 4). Each set of nodes at one level is connected to an associated node in the level a bove for transmission and reception of traffic. Traffic is assigned to one of a number of bands of wavelengths according to whether it i s local or wider area traffic. At the first level of node (11-22) local area traffic in the corresponding band of wavelengths is l ooped back and retransmitted to all of the terminals (a-x) that are connected to that node. At each level of node, traffic is either passed on to a higher level, or looped back according to the band of wavelengths to which it is assigned. Thus, the waveleng th band determines the node level at which the traffic is looped back, and the breadth of terminals ultimately exposed to this traffic. It is possible to re-use bands of wavelengths for communicating between terminals.

A METHOD TO PROVIDE INFORMATION CONCERNING A FREQUENCY BAND,A HEAD-END, A NETWORK TERMINATOR AND A TERMINAL REALIZING SUCH A METHOD ANDA COMMUNICATION ACCESS NETWORK INCLUDING SUCH A HEAD-END, SUCH A NETWORK TERMINATOR AND SUCH A TERMINAL

A method to provide information in a communication access network which includes a plurality of terminals (T12, T12, T13, ..., T31, ...) and a head-end (HE): The head-end (HE) includes transceivers (TRX1, TRX2, TRX3, ...) a nd is downstream coupled to each one of the terminals via a downstream common link (Lc) and a tree-like distributive network. Each transceiver provides to a combiner (COMB) included in the head-end (HE) a downstream signal (Sd1, Sd2, Sd3, ...) in a frequency band (CH1, CH2, CH3, ...) associated to the transceivers (TRX1, TRX2, TRX3, ...). The downstream signals (Sd1, Sd2, Sd3, ... ) are together combined into a downstream modulated signal (S-MOD) which is broadcasted from the head-end (HE) to the terminals. A first one (T12) of the terminals is upstream coupled to a first transceiver (TRX1) via an upstream link . The information is provided to the first terminal and concerns a filter frequenc y band (CH1) which is a first one of the frequency bands which has to be used ...

OPTICAL COMMUNICATION SYSTEM OPTICALLY COMBINING BOTH BASEBAND AND PASSBAND SIGNALS

The present invention relates to an optical communication system for transmitting both baseband and passband signals on a common optical transmission path. The system is comprised of a source of an electrical baseband signal a nd a source of an electrical passband signal modulated for digital broadcast services. A first optical transmitter is provided that is responsive to the electrical baseband signal for generating an optical baseband signal. A second optical transmitt er is provided that is responsive to the electrical passband signal for generating an optical passband signal. An optical combiner is optically coupled to the transmitter s for combining the optical baseband and passband signals into a combined optical signal. An optical transmission path is provided optically coupled to the combiner for transmitting the combined optical signal. An optical receiver is optically coupled to the transmission path for receiving transmitted optical signals.

METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION TO EQUIPMENT FOR SHIPPING CONTAINER.

Optical line terminal communication method and device with data structure

Optical-wireless fusion communication system and optical-wireless fusion communication method

Methods, systems and devices for integrating wireless technology into a fiber optic network

Carried out by a heat source ONT wavelength tuning method and device

Data center network based on passive optics

Passive optical network system, optical line terminal, and optical network unit

Securing the optical links.

METHOD AND NETWORK FIBER OPTIC COMMUNICATIONS WITH FREQUENCY DIVISION MULTIPLEXING.

PASSIVE DEVICE MULTIPORT OF DIVISION OF OPTICAL SIGNALS

WAVELENGTH DIVSION MULTIPLEXING PASSIVE OPTICAL NETWORK

Apparatus for Combining and Splitting Wavelength Band Having Four Input and Output Ports

OPTICAL SOURCE FOR A WAVELENGTH DIVISION MULTIPLEXED OPTICAL NETWORK CAPABLE OF HIGH-SPEED TRANSMISSION OF AN OPTICAL SIGNAL BY USING AN UN-POLARIZED LIGHT SOURCE AND A WAVELENGTH DIVISION MULTIPLEXED-PASSIVE OPTICAL NETWORK WITH THE SAME, CAPABLE OF INCREASING TRANSMISSION SPEED USING AN UN-POLARIZED LIGHT SOURCE

PURPOSE: An optical source for a wavelength division multiplexed optical network capable of high-speed transmission of an optical signal by using an un-polarized light source and a wavelength division multiplexed-passive optical network with the same are provided to obtain small RIN(Relative Intensity Noise) even though non-interference light with weak strength is incident. CONSTITUTION: An AWG(Arrayed Waveguide Grating) divides a spectrum of non-interference light outputted from a broadband non-interference light source. A circulator is connected between the broadband non-interference light source and the AWG. A plurality of un-polarized light sources are connected to AWGs respectively. Spectrum-divided non-interference light is incident on the non-interference light source. The non-interference light is wavelength-locked. COPYRIGHT KIPO 2011 ...

ETHERNET-BASED BROADCASTING AND COMMUNICATION INTEGRATING SYSTEM AND A METHOD THEREOF, SPECIALLY IN REFERENCE TO SIMULTANEOUSLY SUPPLYING AN INTERNET SERVICE AND A MULTI-CHANNEL BROADCASTING SERVICE

PURPOSE: An Ethernet-based broadcasting and communication integrating system and a method thereof are provided to receive a one-way multi-channel CATV broadcasting service and a data communication service through a single line without using another broadcasting line, thereby providing an integrated broadcasting/communication service. CONSTITUTION: A broadcasting program provider(901) manufactures a broadcasting signal. An SO(System Operator)(902) transmits the broadcasting signal to a subscriber. The subscriber's receiving device receives the broadcasting signal. An Ethernet transmission network(903) located between the broadcasting program provider(901) and the SO(902) consists of edge switches(303,304) and a backbone switch. The broadcasting program provider(901) includes a transmission function block which configures an Ethernet broadcasting frame and transmits the frame to the SO(902). The SO(902) includes a distributive center which selects channel broadcasting signals and multiplexes ...

METHOD FOR REALIZING WAVELENGTH DIVISION MULTIPLEXING PASSIVE OPTICAL NETWORK BY USING INCOHERENCE BROADBAND LIGHT SOURCE, PARTICULARLY REGARDING TO REDUCING REQUIRED SPACE AND REDUCING COST

PURPOSE: A method for realizing a wavelength division multiplexing passive optical network by using an incoherence broadband light source is provided to reduce a space occupied by a device by simplifying a plurality of optical line terminal located in a central base station, reduce cost by sharing components of the optical line terminal, and reduce power consumption. CONSTITUTION: A central base station has a plurality of optical line terminals. The optical line terminal includes a broadband light source, a four-terminal broadband light source combiner connected with output of the broadband light source, an optical wavelength router connected with the four-terminal broadband light source combiner, and optical transmitters and receivers connected with the optical wavelength router. To share the broadband light source, output of a high-output broadband light source(200) is inputted to a 1xN optical power distributor(201), and output ends(202-204) of the 1xN optical power distributor are connected ...

PASSIVE OPTICAL COMMUNICATION SYSTEM OF A SELF-LOCKING TYPE USING A FABRY-PEROT FILTER CAPABLE OF REDUCING MANUFACTURING COSTS

PURPOSE: A passive optical communication system of a self-locking type using a fabry-perot filter is provided to filter incident light to an optical signal of a specific wavelength and transmits the filtered optical signal to an optical source. CONSTITUTION: An optical source generates an optical signal. A multiplexer(120) multiplexes the optical signal generated from the optical source and downwardly transmits the multiplexed optical signal. A Fabry-perot unit(130) reflects the optical signal to the optical source. The multiplexer transmits the reflected optical signal from the Fabry-perot unit to the optical source. COPYRIGHT KIPO 2012 ...

METHOD AND AN APPARATUS FOR RECORDING DATA, A METHOD AND AN APPARATUS FOR REPRODUCING DATA, AND A RECORDING MEDIUM, CAPABLE OF REPRODUCING A 3D IMAGE BY USING DATA STORED IN AN OPTICAL RECORDING MEDIUM

PURPOSE: A method and an apparatus for recording data, a method and an apparatus for reproducing data, and a recording medium are provided to record additional 3D reproduction information, thereby reproducing a 3D image by using an optical recording medium. CONSTITUTION: At least one AV stream is received(S710). The AV stream provides plural associated video signals. Three dimensional reproduction supplementary information to be used when reproducing a 3D image by using the plural associated video signals is generated(S720). At least one AV stream and the three dimensional reproduction supplementary information are recorded in a recording medium(S730). The three dimensional reproduction supplementary information includes at least one of reproduction mode information, multiple format information, image depth information, and photographing information of the image signal. © KIPO 2009 ...

A PASSIVE OPTICAL NETWORK ARRANGEMENT AND METHOD

This disclosure relates to wavelength division multiplexed (WDM) passive optical networks (PON), and the transmission of point-to-point and broadcast or multicast channels from an optical line transmitter (OLT) to an optical network unit (ONU). There is provided a WDM PON (100) comprising: an OLT (105) coupled to a plurality of ONU (110a, 110b) using an optical fibre network (160); the OLT (105) having one or more WDM transceivers (115a, 115b) each arranged to receive multi-cast and point-to-point channels and wherein the or each WDM transceiver (115a, 115b) is arranged to transmit a said channel to a respective said ONU (110a, 110b) using a respective dedicated wavelength (λa, λb); an input channel switch (130a, 130b) associated with the or each WDM transceiver (115a, 115b) and arranged to selectively couple the input of the WDM transceiver to the multi-cast channels and the point-to-point channels (140,135); wherein the selected multi-cast or point-to-point channels are directly converted ...

METHOD AND NETWORK ARCHITECTURE FOR UPGRADING LEGACY PASSIVE OPTICAL NETWORK TO TIME DIVISION MULTIPLEXING PASSIVE OPTICAL NETWORK BASED NEXT-GENERATION PASSIVE OPTICAL NETWORK

The present invention discloses a method and a network architecture for upgrading a legacy passive optical network to a time division multiplexing passive optical network based next- generation passive optical network. An apparatus for combining and splitting wavelength bands to be used in the present invention is embodied by two edge filters and one coarse wavelength division multiplexing (CWDM) filter, and combines and splits signals of a legacy TDM-PON and signals of a next- generation PON so that it is possible to embody upgrading a legacy TDM-PON to a next- generation PON simply and effectively.

METHOD AND SYSTEM FOR WAVELENGTH ALLOCATION IN A WDM/TDM PASSIVE OPTICAL NETWORK

A method and system for wavelength allocation in a WDM/TDM passive optical network. The method comprises the steps of providing a fixed wavelength channel to a plurality of optical network units (ONUs) in the passive optical network for TDM downlink/uplink data transmission; determining whether the fixed wavelength channel should be switched to an alternative wavelength channel for one or more of the plurality of ONUs; and allocating the alternative wavelength channel to said one or more ONUs.

METHOD AND DEVICE FOR DISTRIBUTION OF MULTIMEDIA COMMUNICATION CHANNELS IN A PASSIVE OPTICAL NETWORK

Method and system for the distribution of multimedia communication channels, e.g. TV digital channels, through a passive optical network (e.g. GPON). The present invention try to solve the technical problems related to PPV or customized multimedia services, including new functionalities in the optical access network termination point, the ONT. These functionalities are specifically targeted to permit the usage of the ONT PPV capable as an end user device for a basic PPV service with standard Digital TV decoders (e.g. the ones already integrated in DTT TV sets).

OPTICAL COMMUNICATION SYSTEM, COMMUNICATION APPARATUS AND BAND CONTROL METHOD

This invention relates to an optical communication system wherein some of ring nodes operate as OLTs each of which executes a processing to allocate an upstream band to ONUs and wherein each node operating as the OLT treats ONUs, which are in charge of the same remote node, as a single ONU group and has a first band allocation function for distributing the upstream band, which has been allocated to the local system, to each ONU group on the basis of an upstream band allocation request amount from each ONU and the number of ONUs belonging to the ONU group, and a second band allocation function for re-distributing, for each ONU group, the upstream band, which was distributed by the first band allocation function, to each ONU in the group on the basis of the upstream band allocation request amount from each ONU.

SYSTEM AND METHOD FOR DISTRIBUTING DIGITAL SIGNALS OVER LONG-DISTANCE SWITCHED OPTICAL TRANSPORT NETWORKS

The invention relates to a system and a method for distributing digital signals over wavelength-switched optical transport networks with long-distance optical multicasting capability, which includes a transmitter module and a receiver module in the primary headend and in the local node, respectively, for multicasting of IPTV channels with HDTV, UHDTV and 3D-TV signals. The transmitter module includes an Ethernet switch, three DPSK modulators and a DWDM optical multiplexer. The receiver module includes an Ethernet switch, three DPSK demodulators and a DWDM optical demultiplexer. In a novel manner, both modules combine 2 Gbps digital transmission, RZ-DPSK modulation and optical multicasting over a wavelength-switched optical network (WSON).

A WAVELENGTH-DIVISION MULTIPLEXED PASSIVE OPTICAL NETWORK FOR EMBODYING WAVELENGTH-INDEPENDENT OPERATION OF WAVELENGTH-LOCKED FABRY-PEROT LASER DIODES BY INJECTING A LOW NOISE BROADBAND LIGHT SOURCE

The present invention relates to a wavelength-division multiplexed passive optical network (WDM-PON) which embodies wavelength-independence of wavelength-locked Fabry Perot- Laser Diode (F-P LD). A WDM-PON of the present invention comprises an optical fiber being used for optical transmission to and from a broadband light source (BLS) with a low noise characteristic; first arrayed waveguide Gratings (AWG) for filtering light transmitted from the BLS which is oscillated in a plural mode into a group of n numbers wherein the first AWG have a bandwidth broader than a bandwidth of one mode of the BLS; n F-P LDs outputting wavelength-locked light by light being injected through the first AWG; a circulator bypassing and outputting wavelength-division multiplexed signals which are inputted through the first AWG and the optical fiber; and second AWG de-multiplexing the WDM signals into a group of n numbers wherein the second AWG have a bandwidth broader than the bandwidth of the BLS to be injected ...

OPTICAL ACCESS NETWORK

An optical access network (5) comprises an optical line terminal (10) and an optical network unit (20) having a transmitter (24). An optical path (11, 12, 14, 15) connects an output of the transmitter (24) of the optical network unit (20) to the optical line terminal (10). The transmitter (24) of the optical network unit (20) is arranged to transmit an upstream signal (40) with an amplitude modulation format having at least one level transition per data bit period for at least one of the logical bits and a frequency modulation occurring with the level transition. An optical filter (16, 18, 31, 34) is positioned in the optical path. A central wavelength of a response (51) of the optical filter (16, 18, 31, 34) has an offset (53) with respect to a wavelength (41) of the upstream signal (40). The wavelength (41) of the upstream signal (40) is located on a slope (54) of the response (51) of the optical filter.

OPTICAL LINE TERMINATION AND OPTICAL NETWORK UNIT

The invention comprises an optical network unit (ONU) constituting an Ethernet-based PON (Passive Optical Network) that consists of an optical transceiver module; a power source switch that turns on or off power supplied to the said optical transceiver module; and a controller designed to shut off the power source for the sending end of the optical transceiver module by controlling the said power switch depending on register messages received from the OLT after register_request message is received.

DOCSIS COMPATIBLE PON ARCHITECTURE

In one embodiment, systems for transporting a signal between at least one control point and a user device, comprising a passive optical network operatively coupled to the at least one control point and an optical network termination operatively coupled to the passive optical network and operatively coupled to the user device, wherein the optical network termination comprises an upstream laser and an upstream laser driver coupled to the upstream laser and an upstream laser driver trigger, the upstream laser driver trigger is configured to activate the upstream laser driver and initiate an upstream signal in compliance with Data Over Cable Service Interface Specification (DOCSIS) from the user device to the at least one control point.

A WAVELENGTH DIVISION MULTIPLEXING PASSIVE OPTICAL NETWORK AND ITS IMPLEMENT METHOD

A wavelength division multiplexing passive optical network and its implement method, in this optical network, optical line termination includes at least one optical transmit module, each optical network unit includes an optical receive module, said optical transmit module one-to-one corresponds to optical receive module; the optical transmit module, for splitting one optical source to two bunch, one bunch optical signal served as downlink signal carrier, anther loops back through the optical network unit and served as uplink signal carrier. The optical receive module in the optical network unit, receives optical signal from optical transmit module, and transmits uplink signal using the received uplink signal carrier provided by the optical transmit module. The embodiment in the present invention provides an implement method of wavelength division multiplexing passive optical network. The embodiment in the present invention doesn’t need to apply other optical source generator to generate ...

MULTI-WAVELENGTH, BI-DIRECTIONAL OPTICAL MULTIPLEXER

An optical network unit is associated with a multi-wavelength optical fiber communications system carrying low-power digital signals bidirectionally transmitted at a first and a second wavelength and a high-power analog video signal transmitted at a third wavelength. The unit comprises a housing having a connection for the optical fiber; and an optical filter, first and second optical units, and a beam splitter mounted in the housing. The optical filter is interposed between the fiber termination and the second optical unit, and is adapted to block light of the third wavelength but bidirectionally transmit light of the first and second wavelengths. The system is readily implemented, and any combination of the data and video services may be selected. A high level of skill is not required for changing the combination of services procured.

SYSTEM AND METHOD FOR PERFORMING IN-SERVICE FIBER OPTIC NETWORK CERTIFICATION

A system and method for multiplexing an in-service optical time domain reflectometry (ISOTDR) session using the same wavelength as the data traffic for pointto-point or point-to-multipoint optical fiber networks while not impacting data transmission is disclosed.

PON WAVELENGTH BONDING FOR PROVIDING HIGHER-RATE DATA SERVICES

Methods, systems, and apparatus for Passive Optical Network (PON) wavelength bonding are disclosed. In one aspect, a first frame of data to a first optical network unit (ONU) is transmitted by an optical line terminal (OLT) over a first wavelength. While the first frame of data is being transmitted to the first ONU over the first wavelength, a first portion of a second frame of data to a second ONU is transmitted by the OLT over a second wavelength. After transmission of the first frame of data over the first wavelength has completed and while the first portion of the second frame of data is still being transmitted to the second ONU over the second wavelength, a second portion of the second frame of data to the second ONU is transmitted by the OLT over the first wavelength.

INTEGRATED ACCESS NETWORK

The present invention is an optical terminal device comprising a signal modulator configured to generate a first signal modulated onto a first optical sideband of a first optical wavelength signal and a second signal modulated onto a second sideband of the first optical wavelength signal, the first signal being a different type than the second signal; a receiver configured to receive a third signal modulated onto the first optical sideband of a second optical wavelength signal and a fourth signal modulated onto a second sideband of the second optical wavelength signal, the third signal being a different type than the fourth signal; and a circulator coupled to the signal modulator and the receiver, wherein the circulator is configured to communicate with a node of an integrated network via an optical fiber. A remote node, a communication terminal, and a method of performing integrated network access are also disclosed.

Dynamic communication bandwidth allocation method, computer-readable medium storing dynamic communication bandwidth allocation program, semiconductor chip, and PON system

The present invention provides a station-side terminal device including a control signals reading/generating section that receives a requested bandwidth which the subscriber-side terminal devices require for the communication, from each of the subscriber-side terminal devices, and an uplink band allocating section including a first calculation section that allocates a usable communication bandwidth to each of the subscriber-side terminal devices based on a ratio of a service level parameter predetermined for each of the subscriber-side terminal devices, and a second calculation section that obtains an updated usable communication bandwidth updated by subtracting a sum of the allocated bandwidths from the usable communication bandwidth, and obtains an updated requested bandwidth updated by subtracting the allocated bandwidth from the requested bandwidth, to allocate the updated usable communication bandwidth to each of the subscriber-side terminal devices based on a ratio of the updated ...

Cross-connect using ethernet multiplexors for a simple metro ethernet network

A metro area network is provided that includes edge and core multiplexors each having a plurality of line ports and one or more uplink ports, a transport network carrying multiplexed traffic between the edge and core multiplexors. In a hard cross connect implementation utilizing source port tagging, a cross-connect device coupled to the core multiplexors provisions or maps communications path between the core multiplexors thereby providing preselected connectivity/mapping of two or more line ports of any of the edge multiplexors. In a soft cross connect implementation utilizing destination port tagging, a cross-connect device includes additional cross-connect multiplexors and functionality to control the destination port tagging performed in the edge, core and cross connect multiplexors thereby provisioning or mapping the desired communications path(s) between various endpoints.

Optical access network of wavelength division method and passive optical network using the same

An optical access network of wavelength division method and passive optical network using the same are disclosed. The wavelength division multiplexed optical access network includes a central office for multiplexing first optical signals for wire communication and second optical signals for wireless communication and a remote node connected to the central office through an optical fiber and for demultiplexing a multiplexed optical signal received from the central office. A plurality of subscribers may be connected to the remote node. Each subscriber receives a first optical signal having a corresponding wavelength from among the demultiplexed first optical signals. The network also includes a plurality of radio relay stations connected to the remote node, each radio relay station converting a second optical signal having a corresponding wavelength from among the demultiplexed second optical signals into a radio electric signal and wirelessly transmitting the radio electric signal.

Dynamic multicast group management and service wavelength allocation method for communication-broadcasting convergence service in WDM-PON

The present provides a method of dynamically managing multicast groups and allocating multicast service wavelengths for the highest channel efficiency. According to the present invention, the share indices of wavelengths of all multicast service groups, which employ broadcasting wavelengths and data wavelengths, are periodically ascertained on the basis of IGMP snooping-based technology in a WDM-PON. Based on the ascertainment results, if the channel share index of the group that employs the broadcasting wavelength is smaller than the channel share index of the group that employs the data wavelength, the share index of the wavelength of the multicast group that employs the broadcasting wavelength is maximized by dynamically changing allocation of the wavelength of the multicast group, so that a maximum multicast service can be provided within limited resources.

Communication system for performing wavelength division multiplexing communications, and wavelength control method used in the system

A communication system has a first communication system for performing wavelength division multiplexing communications, and a second communication system independent of the first communication system. In the communication system, a wavelength control unit detects the wavelength arrangement in the first communication system, generates a wavelength control signal on the basis of the detected wavelength arrangement, and transmits the wavelength control signal to the respective communication nodes via the second communication system. Each communication node controls its transmission wavelength on the basis of the wavelength control signal. As the wavelength control unit, there are disclosed an arrangement for arranging a wavelength control node independently of the communication nodes, an arrangement using a communication node in a non-receiving state, and an arrangement for assigning the function of the wavelength control unit to a center node.

Optical communication network using redundant waveguides and two way operation

In an optical communication network for multiplex operation, a light waveguide is conducted up to a branching point proceeding from a respective distributing location. A division of the signals into two sub-signals with a directional coupler occurs at this branching point. A second light waveguide that is connected to the second input of the directional coupler is additionally laid between the distributing and the branching point. A switching onto the second light waveguide is provided. A system is described for two-way management using a pair of direction couplers connected crossed to a plurality of direction couplers on the subscriber side.

WDM optical network with passive pass-through at each node

A communications network has a plurality of nodes interconnected by an optical transmission medium. The transmission medium is capable of a carrying a plurality of wavelengths organized into bands. A filter at each node for drops a band associated therewith and passively forwards other bands through the transmission medium. A device is provided at each node for adding a band to the transmission medium. Communication can be established directly between a pair of nodes in the network sharing a common band without the active intervention of any intervening node. This allows the network to be protocol independent. Also, the low losses incurred by the passive filters permit relatively long path lengths without optical amplification.

Simultaneous delivery of 1280 video channels over a WDM passive optical network

Simultaneous delivery of 1280 video channels over a passive optical network using wavelength division multiplexing (WDM). The network is suitable for carrying broadcast and switched services. Its high capacity is achieved by stacking four RF blocks on fours spectrally sliced WDM PON bands in a manner which reduces spontaneous beat noise.

Wavelength division multiplexing passive optical network system

A wavelength division multiplexing passive optical network system is disclosed. The system includes a fiber transfer end for transmitting downstream optical signals through a fiber. The downstream optical signals are obtained by performing wavelength division multiplexing on downstream channels having different wavelengths from one another. The fiber transfer end also demultiplexes upstream optical signals received through the fiber. The upstream optical signals are include a first and a second upstream channels having different wavelengths from one another. The system also includes a power splitter for performing a uniform power split on the downstream optical signals received through a first port that is connected to the fiber, and for outputting the split optical signals through a plurality of second ports, and for outputting upstream optical signals through the first port. The upstream optical signals are a combination of the first and the second upstream channels received from the ...

Multichannel, multihop lightwave communication system

The present invention relates to a multichannel multihop lightwave communication network which allows packet concurrency in the network while avoiding the need for agile optical devices. The network comprises a lightwave communication medium (10) for supporting a plurality of independent user nodes; and a plurality of N network interface units (NIUs) (11). Each NIU is connected to the lightwave medium and one or more separate user nodes and comprises a trnasmitter section (28-35) and a receiver section (20-27) which are each fixedly assigned to transmit and receive, respectively, over a single channel or a plurality of separate channels to or from other NIUs of the network. In a connectivity pattern for one embodiment of the network, the NIUs are divided into k groups of pk NIUs such that each NIU of a first group of pk NIUs is capable of transmitting over the fixedly assigned single channel, or any or all of the p separate channels, to a preferred one or all of the associated p separate ...

Device for a passive optical network

Passive optical networks are generally built from a central office and a plurality of passive optical nodes. Over a main path, optical signals are transmitted to the nodes. When a fault, e.g. a cable break, occurs on the main path, the optical signals are transmitted to the nodes over a reserve path. When the fault has been removed, switchback to the main path is effected and the optical signals are again transmitted to the nodes over the main path. The device according to the invention is particularly characterized in that an additional optical signal is provided which is transmitted at a wavelength outside the wavelength range used for the transmission of useful optical signals over the main path, and which is used to power an electric circuit within the device which, in turn, controls a switch that switches between main path and reserve path.

Fault management in a multichannel transmission system

Efficient methods for rerouting failed channels on to spare channels in a multichannel transmission system are described. One method uses a minimal amount of rerouting to reroute all the channels if one or two line cards fail.Another set of methods reroute up to two failed channels on to spare channels in the event of channel failures. With this method only the failed channels are rerouted. However the failed channels may have to be routed through a slightly larger, but minimal, number of additional hops than with the first method.

Method, system and device for the supervision of optical fibres

The present invention describes a method, system and device for supervising a set of optical fibers of an Optical Network (detecting and locating the failures in deployed optical fibers) which solve some of the problems found in prior art techniques The embodiments of the present invention suggest an innovative approach, which allows to accurately and unambiguously detect and locate failures even in complex point to multipoint optical fiber networks.

Method and system for processing upstream packets of an optical network

A protocol for an optical network can control the time at which subscriber optical interfaces of an optical network are permitted to transmit data to a transceiver node. The protocol can prevent collisions of upstream transmissions between the subscriber optical interfaces of a particular subscriber group. With the protocol, a transceiver node close to the subscriber can allocate additional or reduced upstream bandwidth based upon the demand of one or more subscribers. That is, a transceiver node close to a subscriber can monitor (or police) and adjust a subscriber's upstream bandwidth on a subscription basis or on an as-needed basis. The protocol can account for aggregates of packets rather than individual packets. By performing calculation on aggregates of packets, the algorithm can execute less frequently which, in turn, permits its implementation in lower performance and lower cost devices, such as software executing in a general purpose microprocessor.

Configuration of passive optical networks including cascaded array waveguide gratings

Techniques for partitioning and/or combining at least a portion of an optical network tree including one or more array waveguide gratings (AWGs) and fibers in wavelength division multiplexing (WDM) passive optical networks (PON) with cascaded AWGs are disclosed. Example methods include deriving the optimal positions for the AWGs to minimize fiber cost and then determining the arrangement of cascaded AWGs to minimize the total cost of AWGs and fibers. Determining the arrangement of cascaded AWGs may include recursive partitioning followed by recursive combination. An example recursive partition-combination based algorithm for optimizing a tradeoff between the AWG cost and the fiber cost is disclosed.

Wireless drop in a fiber-to-the-home network

One embodiment is directed to a wireless drop terminal (WDT) for use in a fiber-to-the-home (FTTH) network. The wireless drop terminal comprises a fiber interface to optically couple the wireless drop terminal to an optical line terminal (OLT) of the FTTH network via at least one optical fiber and a wireless interface communicatively coupled to the fiber interface. The wireless interface is configured to wirelessly communicate with a wireless optical network terminal (W-ONT) over a fixed directional wireless drop. Other embodiments are disclosed.

NEXT GENERATION IN-BUILDING RELAY SYSTEM AND METHOD

Provided are a next generation in-building relay system and method. The system includes: a 5G signal providing unit configured to down-convert a millimeter wave radio frequency signal to an intermediate frequency signal; a 5G master hub unit configured to convert the intermediate frequency signal into a radio over fiber (RoF) signal and transmit the RoF signal; an optical coupling unit configured to couple a digital optical signal output from a master hub unit and the analog optical signal output from the 5G master hub unit and transmit the coupled signal to an optical cable; and an optical distribution unit configured to separate the digital optical signal and the analog optical signal from the coupled signal, transmit the digital optical signal to a remote optical relay unit, and transmit the analog optical signal to distributed remote units.

SCHEDULING WDM PON WITH TUNABLE LASERS WITH DIFFERENT TUNING TIMES

Technologies are generally described for network traffic scheduling in a wavelength division multiplexing (WDM) passive optical network (PON). Dynamic wavelength assignment and time allocation in hybrid WDM/TDM PONs with tunable lasers as optical light generators is accomplished by mapping the scheduling into a multi-processor scheduling problem with wavelength channels as machines and ONU requests as jobs. Wavelengths may be considered as parallel identical machines. Taking laser tuning time into consideration preemptive and non-preemptive scheduling with the objective of minimizing the latest job completion time is computed employing a number of heuristic algorithms. The algorithms compute two extreme cases of zero and infinity laser tuning time, respectively. Using the results from these two extreme cases, the heuristic scheduling schemes for the case of arbitrary laser tuning time yield close average latest job completion times for both schedule types.

Method and apparatus for providing an antireflection coating on the output facet of a photonic integrated circuit (PIC) chip

An on-chip photodiode is provided in a photonic integrated circuit (PIC) on a semiconductor chip to monitor or check for antireflection qualities of an AR coating applied to the front facet of the semiconductor chip.

COMMUNICATION

The present invention relates to communication, in particular to communication involving analogue-like signals that are multiplexed together. There is provided a method of communicating with a plurality of devices, each of which of which provides a signal whose amplitude varies in an analogue fashion, the method including the steps of: temporally interleaving the signals from the devices so as to form a multiplexed signal having a plurality of sequential pulses, which pulses can, in an analogue fashion, each have an amplitude within a continuous range, each pulse originating from a respective device, and each pulse having a plurality of temporal portions; and, forming a synchronisation signal within the multiplexed signal for demultiplexing the multiplexed signal, the synchronisation signal being formed by reducing the amplitude within a temporal portion of at least some of the pulses.

TRANSMISSION DEVICE, OPTICAL TERMINATION DEVICE, TRANSMISSION SYSTEM, AND TRANSMISSION METHOD

A transmission device includes an interface configured to acquire, from a base band unit having a communication destination that is one of remote radio heads, communication destination information relating to the remote radio head of the communication destination, a receiver configured to receive signals of given wavelength from optical termination devices, and a transmitter configured to transmit a first signal that includes wavelength information indicative of the given wavelength and the communication destination information to optical termination devices, wherein, when the receiver receives, from an optical termination device of the remote radio head of the communication destination from among optical termination devices, a second signal of the given wavelength according to the first signal, the receiver sets, between the receiver and the optical termination device, a relay path that relays communication between the base band unit and the remote radio head of the communication destination.

DYNAMIC INTELLIGENT BIDIRECTIONAL OPTICAL AND WIRELESS ACCESS COMMUNICATION SYSTEM

According to one embodiment of the present invention, a wavelength-shifted dynamic intelligent bidirectional access optical system utilizes key optical elements such as: a quantum dot enabled semiconductor optical amplifier, a phase modulator and an intensity modulator to provide upstream optical signals. These key optical elements reduce the Rayleigh backscattering effect on the transmission of optical signals. Reduced Rayleigh backscattering effect enables a longer-reach access network topology (more than any other current access network topology) between a subscriber unit and a super node (e.g., many local nodes collapsed into one super node). Such a longer-reach access network topology eliminates operational costs and capital costs related to a vast array of middle equipment such as routers and switches, which would otherwise be needed between super nodes and many remote nodes. Furthermore, a wavelength to a subscriber unit may be protected and dynamically varied for on-Demand bandwidth ...

Passive optical network

A passive optical network includes: a central office for generating multiplexed downstream optical signals and receiving an upstream optical signal; a plurality of optical network units for receiving a corresponding downstream optical signal and generating subcarrier channels carrying electrical data of an assigned frequency; and a remote node for photoelectrically converting the channels into electrical data, electro-optically converting the electrical data into at least one upstream optical signal.

Fault management in a multichannel transmission system

Efficient methods for rerouting failed channels on to spare channels in a multichannel transmission system are described. One method uses a minimal amount of rerouting to reroute all the channels if one or two line cards fail. Another set of methods reroute up to two failed channels on to spare channels in the event of channel failures. With this method only the failed channels are rerouted. However the failed channels may have to be routed through a slightly larger, but minimal, number of additional hops than with the first method.

Wavelength division multiplexed passive optical network

Consistent with the present disclosure, an optical communication system, such as a passive optical network (PON), is provided that includes an optical line terminal (OLT) and a plurality of optical network units (ONUs). The OLT includes a plurality of photonic integrated circuits that have both optical transmitters and receivers provided therein. Accordingly, the OLT may have fewer components and a simpler, more reliable and cost-effective design than a conventional OLT including discrete components. In addition, various ONU configurations are provided that also have a simple design and fewer components. Thus, ONUs consistent with the present disclosure may also have reduced costs.

Bidirectional wavelength division multiplexed-passive optical network

Provided is a bidirectional WDM-PON. The bidirectional WDM-PON includes an optical comb generator, an amplifier, an optical de-interleaver, a downstream signal generator, an upstream signal generator, an upper circulator, and a lower circulator. The optical comb generator generates multi-wavelength light. The amplifier amplifies the multi-wavelength light. The optical de-interleaver receives the amplified multi-wavelength light to divide the received light into an odd wavelength train and an even wavelength train, and outputs the odd and even wavelength trains. The downstream signal generator receives the odd wavelength train to generate a downstream signal. The upstream signal receiver receives an upstream signal. The upper circulator determines a delivery path of the odd wavelength train and the downstream signal. The lower circulator determines a delivery path of the even wavelength train and the upstream signal.

Optical multiplexing terminating device, passive optical network system and method for allocating wavelength

A passive optical network system such that the power consumption can be reduced as much as possible according to the end-user traffic. An OLT uses the DBA function thereof and sequentially uses frequencies in ascending order of transmission rate in order to sequentially allocate bands to ONUs in ascending order of the requested bandwidth. At this time, a frequency to be allocated is selected so that the bandwidth allocated to each ONU is narrower than a maximum bandwidth through which transmission using the allocated wavelength is enabled. An OLT uses a grant area to specify the transmission timing of the secondary station and to inform the specified transmission timing to the secondary station. In addition, an area is set for storing information used to inform the secondary station of a new frequency to be used.

Multiport passive device for sharing optical signals

A multiport passive optical signal sharing device enabling optical signals received by each of a first plurality of ports of the device to be transmitted to all of the ports of a second plurality of ports of the device. The device includes a first coupling mechanism adapted to combine signals received by each port of the first plurality of ports of said device into a first optical signal, the first optical signal being transmitted over a bi-directional optical link. The device further includes a second coupling mechanism and guide for redirecting the first optical signal in a form of a second optical signal into the bi-directional optical link, in the opposite direction from that of the first optical signal, the first coupling mechanism being adapted to duplicate the second optical signal on each port of the second plurality of ports of the device.

Passive optical network

A distribution node of a passive optical network (PON) comprises a first port for receiving a first optical continuous envelope modulated downstream data signal at a first wavelength (λ C ) from a first optical line termination unit (OLT 1 ) and a second port for receiving a second optical continuous envelope modulated downstream data signal at a second wavelength (λ L ) from a second optical line termination unit (OLT 2 ). A first converter (FBG- 1 ) performs continuous envelope modulation-to-intensity modulation conversion of the first optical downstream data signal and forwards the converted first optical downstream data signal (λ C ) to the first group of optical network units (ONU 1 . . . N ). A second converter (FBG- 2 ) performs continuous envelope modulation-to-intensity modulation conversion of the second optical downstream data signal and forwards the converted second optical downstream data signal (λ L ) to the second group of optical network units (ONU N+1 . . . 2N ). The distribution node forwards a seed signal at the first wavelength (λ C ) to the second group of optical network units (ONU N+1 . . . 2N ) and forwards a seed signal at the second wavelength (λ L ) to the first group of optical network units (ONU 1 . . . N ).

Method of Operating an Optical Network Element and Optical Network Element

The invention relates to a method of operating a first optical network element ( 100 ), particularly an optical network unit, ONU, wherein said method comprises the following steps: performing a coarse tuning process ( 2100 ) of at least one transmission wavelength which is used by said first optical network element ( 100 ) for transmitting an optical signal to a second optical network element ( 200 ), particularly an optical line terminal, OLT, and performing a fine tuning process ( 2200 ) of said at least one transmission wavelength, wherein said fine tuning process ( 2200 ) is preferably performed after said coarse tuning process ( 2100 ).

Dynamic communication bandwidth allocation method, computer-readable medium storing dynamic communication bandwidth allocation program, semiconductor chip, and pon system

The present invention provides a station-side terminal device including a control signals reading/generating section that receives a requested bandwidth which the subscriber-side terminal devices require for the communication, from each of the subscriber-side terminal devices, and an uplink band allocating section including a first calculation section that allocates a usable communication bandwidth to each of the subscriber-side terminal devices based on a ratio of a service level parameter predetermined for each of the subscriber-side terminal devices, and a second calculation section that obtains an updated usable communication bandwidth updated by subtracting a sum of the allocated bandwidths from the usable communication bandwidth, and obtains an updated requested bandwidth updated by subtracting the allocated bandwidth from the requested bandwidth, to allocate the updated usable communication bandwidth to each of the subscriber-side terminal devices based on a ratio of the updated requested bandwidth.

Automatic wavelength recognition apparatus and method

Provided are an automatic wavelength recognition apparatus and method. The automatic wavelength recognition apparatus includes: a division unit receiving a single optical signal and dividing the received optical signal into a plurality of optical signals; a plurality of filter units filtering the optical signals and having different and wavelength-dependent pass characteristics; a plurality of detection units detecting the filtered optical signals and measuring intensities of the detected optical signals; at least one comparison unit comparing outputs of any two of the detection units; and a wavelength determination unit receiving an output of the at least one comparison unit and determining a wavelength of the above single optical signal using a pre-stored look-up table.

Laser mux assembly for providing a selected wavelength

A laser mux assembly generally includes a back reflector selectively coupled to one of the input ports of an optical multiplexer, such as an arrayed waveguide grating (AWG), and at least one laser emitter coupled to an output port. The laser emitter may include a gain region that emits light across a plurality of wavelengths including, for example, channel wavelengths in an optical communication system. The emitted light is coupled into the output port and the AWG or optical multiplexer filters the emitted light from the laser emitter at different channel wavelengths. The back reflector reflects the filtered light at the respective channel wavelength such that lasing occurs at the channel wavelength(s) of the reflected, filtered light. The laser mux assembly may be used, for example, in a tunable transmitter, to generate an optical signal at a selected channel wavelength.

Data Processing of an Optical Network Element

A method for data processing of an optical network element is provided, wherein a configuration information is received at the optical network element and a light signal is adjusted to a wavelength or wavelength range indicated by said configuration information; wherein an incoming optical signal is demodulated via the light signal and mixed as an electrical demodulated signal with a signal of an oscillator; wherein the signal of the oscillator is tuned to improve a reception of the incoming signal at the optical network element; and wherein the light signal is used for upstream modulation to provide a modulated optical upstream signal. Furthermore, an according device and a communication system are suggested including at least one such device.

Wavelength Management in Multiple-Wavelength Passive Optical Networks

A system for supporting wavelength management in a passive optical network (PON), comprising an optical line terminal (OLT) configured to send an wavelength assignment for optical network unit (ONU) communications based on a wavelength tunability capability, and an ONU coupled to the OLT and configured to send the wavelength tunability capability to the OLT, wherein the wavelength assignment and the wavelength tunability capability are sent in media access control (MAC) messages. Also disclosed is an apparatus of an OLT for supporting wavelength management, comprising one or more component configured to couple to an ONU and exchange a wavelength assignment for transmission with the ONU based on a wavelength tunability of the ONU, wherein the wavelength indication and the wavelength tunability are exchanged via MAC layer frames.

OPTICAL ACCESS NETWORK

An optical access network comprises L wavelength division multiplexed access sub-networks. Each of the wavelength division multiplexed access sub-networks is arranged to use a set of wavelength channels. M optical line termination apparatus, each receive traffic from a respective operator network and output traffic on the wavelength channels. A wavelength routing apparatus comprises M sets of first ports and L second ports. Each set of first ports connects to a respective one of the optical line termination apparatus and each second port connects to an optical link of a respective one of the wavelength division multiplexed access sub-networks. The wavelength routing apparatus is arranged to route the set of wavelength channels between the sets of first ports and the second ports and to route different wavelength channels of the same wavelength to different ones of the second ports. 1. A system for use in an optical access network , the access network comprising L wavelength division multiplexed access sub-networks , where L≧2 , each of the wavelength division multiplexed access sub-networks arranged to use a set of wavelength channels and having an optical link for carrying a signal comprising a multiplexed set of the wavelength channels , the system comprising:M optical line termination apparatus, where M≧1, each for receiving traffic from a respective operator network and for outputting traffic on the wavelength channels;a wavelength routing apparatus comprising M sets of first ports and L second ports, each set of first ports for connecting to a respective one of the optical line termination apparatus and each second port for connecting to an optical link of a respective one of the wavelength division multiplexed access sub-networks, the wavelength routing apparatus being arranged to route the wavelength channels between the sets of first ports and the second ports and to route different wavelength channels of the same wavelength to different ones of the second ...

Photonic link information collection and advertisement systems and methods

Photonic link information collection and advertisement systems and methods enable photonic nodes (e.g., optical amplifiers) to operate within a control plane system in a distributed and real-time manner. For example, the photonic nodes may not require full control plane protocol stacks at each photonic node. In particular, the systems and methods provide a distributed discovery method for photonic links without requiring full participation in the control plane at the photonic nodes. Additionally, the systems and methods include network databases with amplifier configuration information in a control plane enabled network.

Providing digital data services in optical fiber-based distributed radio frequency (rf) communication systems, and related components and methods

Optical fiber-based distributed communications systems that provide and support both RF communication services and digital data services are disclosed herein. The RF communication services and digital data services can be distributed over optical fiber to client devices, such as remote antenna units for example. In certain embodiments, digital data services can be distributed over optical fiber separate from optical fiber distributing RF communication services. In other embodiments, digital data services can be distributed over common optical fiber with RF communication services. For example, digital data services can be distributed over common optical fiber with RF communication services at different wavelengths through wavelength-division multiplexing (WDM) and/or at different frequencies through frequency-division multiplexing (FDM). Power distributed in the optical fiber-based distributed communications system to provide power to remote antenna units can also be accessed to provide power to digital data service components.

Optical line terminal for bidirectional wavelength-division-multiplexing optical network

The present disclosure relates to an optical line terminal, the disclosure includes: an optical transmitter for generating a low speed downstream optical signal; a wavelength-multiplexer for wavelength-multiplexing the downstream optical signal; a first optical power branching tap coupler for allowing wavelength-multiplexed downstream optical signal to branch off; a wavelength band separator/coupler for separating between the wavelength-multiplexed downstream optical signal and a wavelength-multiplexed upstream optical signal; a circulation type wavelength-demultiplexer for wavelength-demultiplexing a downstream optical signal branched off by the first optical power branching tap coupler and an upstream optical signal separated by the wavelength band separator/coupler; an optical receiver for outputting a downstream electrical signal by using the wavelength-demultiplexed optical signal; and a signal processing module for controlling an optical power and a wavelength of the optical transmitter according to a strength of the downstream electrical signal.

WAVELENGTH-SHIFTED BIDIRECTIONAL WAVELENGTH DIVISION MULTIPLEXING OPTICAL NETWORK

Disclosed is a wavelength-shifted bidirectional WDM optical network including: an optical line terminal including an optical line terminal (OLT) including a first optical transmitter transmitting a downstream WDM optical signal, a first high-density wavelength multiplexer/demultiplexer wavelength-multiplexing the downstream WDM optical signal or wavelength-demultiplexing a wavelength-multiplexed upstream WDM optical signal, and a first optical receiver receiving the wavelength-demultiplexed upstream WDM optical signal; a remote node (RN) including a second high-density wavelength multiplexer/demultiplexer shifting a center wavelength of the upstream WDM optical signal and wavelength-multiplexing the upstream WDM optical signal with the shifted center wavelength or wavelength-demultiplexing the wavelength-multiplexed downstream WDM optical signal; and multiple optical network units (ONUs) each including a second optical transmitter transmitting the upstream WDM optical signal and second optical receiver receiving the wavelength-demultiplexed downstream WDM optical signal. 1. A wavelength-shifted bidirectional wavelength division multiplexing (WDM) optical network comprising:an optical line terminal (OLT) comprising a first optical transmitter transmitting a downstream WDM optical signal, a first standard wavelength multiplexer/demultiplexer wavelength-multiplexing the downstream WDM optical signal, a first optical circulator transferring the wavelength-multiplexed downstream WDM optical signal through an optical fiber line or transferring a wavelength-multiplexed upstream WDM optical signal transferred through the optical fiber line, a first wavelength-shifted wavelength multiplexer/demultiplexer wavelength-demultiplexing the wavelength-multiplexed upstream WDM optical signal transferred through the first circulator, and a first optical receiver receiving the wavelength-demultiplexed upstream WDM optical signal;a remote node (RN) comprising a second wavelength- ...

Optical network unit, optical access network and a method for exchanging information

An Optical Access Network, a Optical Network Unit (ONU) and various methods for exchanging information are provided. The method may include: receiving, by the ONU, a pilot signal and downstream information signals; wherein the pilot signal is received at a pilot frequency slot and the downstream information signals are received at a downstream information frequency slot; wherein the ONU is allocated with a spectral slice that comprises the pilot frequency slot, the downstream information frequency slot, a guard frequency slot and an upstream information frequency slot; wherein at least one other spectral slice is allocated for exchanging information with at least one other group of ONUs; splitting the downstream information signals to downstream information signals portions; splitting the pilot signals to pilot signals portions; detecting downstream information, in response to at least a first portion of downstream information signals; modulating a portion of the pilot signal by upstream information signals to provide upstream information signals that are within the upstream information frequency slot; modulating a second portion of the downstream information signals by the upstream information signals to provide upstream secondary signals that are outside the pilot frequency slot, the downstream information frequency slot and the upstream information frequency slot; and upstream transmitting the upstream information signals and the upstream secondary signals.

Methods and Apparatus for Constructing Large Wavelength Selective Switches Using Parallelism

Optical networks are increasingly employing optical network nodes having multiple interfaces to allow a node to direct optical signals received at any interface to any other interface connected to the node. Constructing a larger wavelength selective switching (WSS) module used in such a node can be complex and expensive. A method an apparatus for constructing a large WSS using parallelism is provided. In example embodiments, a larger WSS may include multiple parallel non-cascaded smaller WSSs and an optical coupler configured to optically couple the multiple parallel, non-cascaded smaller WSSs. This technique may be used to construct both N×1 and 1×N WSSs. Because the technique employs multiple parallel, non-cascaded WSSs, all inputs of a larger N×1 WSS and all outputs of a larger 1×N WSS are available receive or transmit external signals rather than being rather than being unavailable due to, for example, cascading smaller WSS devices together.

Exchange device

The exchange device groups PON branches into PON branch groups based on the amount of communication data traffic that has arrived via a communication network with a plurality of optical network units (ONUs) respectively belonging to one of a plurality of PON branches as a transmission destination, multiplexes the communication data for each PON group, and transmits the multiplexed data. The exchange device has an unit configured to transmit each piece of communication data from the ONUs to one output port selected from among a plurality of output ports based on the transmission wavelength of the communication data. The exchange device groups a plurality of PON branches into PON branch groups based on the required bandwidth of each of the ONUs, and designates the transmission wavelength for each of the ONUs so that each piece of the communication data from one PON branch group is transmitted to one port.

Architecture for Reconfigurable Quantum Key Distribution Networks Based on Entangled Photons by Wavelength Division Multiplexing

A system and method for securing communications over a wave division multiplexing optical network between a plurality of users connected to the network. The system utilizes a primary optical source generator that is either tunable, or capable of generating a plurality of wavebands of different frequencies equal to the sum of wavebands serving individual users of the network to facilitate a key exchange between the individual users of the network using summed wavebands, each of which serving an individual user.

Optical Line Terminal, Optical Network Unit and Passive Optical Network System

The invention discloses are an optical line terminal, an optical network unit, a passive optical network system, an upstream bandwidth allocation method and a rate adaptation method. The OLT comprises: an optical module, a clock and data recovery module, a media access control chip and a control module, wherein, the optical module is configured to receive upstream data sent by ONUs having different transmission rates; the clock and data recovery module is configured to receive the upstream data, recover a clock signal according to the upstream data, and send the upstream data and the clock signal to the media access control chip; the media access control chip is configured to save the upstream data and the clock signal; the control module is configured to, according to the clock signal, acquire an upstream rate of the upstream data, and allocate an upstream bandwidth to the ONU according to the upstream rate.

Remote timing communications

A system, method, and optical switch for communicating timing. A determination is made whether one of a number of data streams are available. Packets are received at a remote node in response to determining one of the number of data streams is available. A timing characteristic of the at least one of the packets is associated with a tick of a reference clock. The tick of the reference clock is extracted utilizing the timing characteristic of the at least one of the packets. A secondary clock is disciplined with the reference clock by adjusting the secondary clock based on a difference between times measured by the reference clock and the secondary clock to generate a clock signal. The clock signal is communicated to one or more interfaces for distributing.

Methods and Arrangements for Providing Radio Access at Local Site

Methods and nodes for providing radio access to a communication network () for mobile terminals (T) at a local site (). When a local transition unit () at the local site receives incoming signals from an antenna (a) and associated radio head (b) installed at the local site, the signals are converted into optical form and the local transition unit sends the signals in optical form over an optical link () to a central office () comprising a set of radio units (). A central transition unit () at the central office converts the signals into a form adapted for reception by a radio unit. The central transition unit is further instructed by a control unit () to forward the signals to one of the radio units based on configuration data of the antenna/radio head. The configuration data has been registered at the control unit when received from the antenna/radio head over a control channel automatically at installation. The central transition unit accordingly forwards the signals according to the instruction from the control unit to the correct radio unit for processing in digital format and digital transmission over the communication network. 1. A method for providing radio access to a communication network for one or more mobile terminals at a local site , the method comprising:receiving, by a local transition unit at the local site, analog signals from at least one antenna and associated radio head installed at the local site, when the at least one antenna receives the signals from the one or more mobile terminals,converting, by the local transition unit, the analog signals into optical form,sending, by the local transition unit, the signals in optical form over an optical link to a central office comprising or being connected to a set of radio units,converting, by a central transition unit at the central office, the signals into a form adapted for reception by a radio unit in the set of radio units,instructing or having instructed, by a control unit the central transition ...

SYSTEM AND METHOD FOR PERFORMING IN-SERVICE OPTICAL NETWORK CERTIFICATION

A system and method for performing an in-service optical time domain reflectometry test, an in-service insertion loss test, and an in-service optical frequency domain reflectometry test using a same wavelength as the network communications for point-to-point or point-to-multipoint optical fiber networks while maintaining continuity of network communications are disclosed. 1. A method for performing optical measurements on one or more wavelengths of one or more optical fibers by a network terminal for use in an optical fiber network , wherein the network terminal is disposed to using frames of an optical Ethernet based network protocol for data communications on the one or more optical wavelengths , the method for performing optical measurements on the one or more wavelengths of the one or more optical fibers by the network terminal comprising:using a Media Access Control (MAC) frame message of the optical Ethernet based network protocol to perform one or more test intervals;performing the one or more test intervals in synchrony with the frames of the optical Ethernet based network protocol, a test interval comprising a first time interval for transmitting an optical test signal followed by a second time interval for turning off an optical transmitter followed by a third time interval for measuring the optical test signal;during the first time interval of a test interval, using the optical transmitter for transmitting the optical test signal on one of the one or more wavelengths used for data communications onto one of the one or more optical fibers; during the second time interval of a test interval, turning off the optical transmitter resulting in no further light transmissions by the optical transmitter for the duration of the second time interval;during the third time interval of a test interval, measuring a portion of the optical test signal, and turning on the optical transmitter after the third time interval of a test interval.2. The method of claim 1 , ...

Integrated access network

The present invention is an optical terminal device comprising a signal modulator configured to generate a first signal modulated onto a first optical sideband of a first optical wavelength signal and a second signal modulated onto a second sideband of the first optical wavelength signal, the first signal being a different type than the second signal; a receiver configured to receive a third signal modulated onto the first optical sideband of a second optical wavelength signal and a fourth signal modulated onto a second sideband of the second optical wavelength signal, the third signal being a different type than the fourth signal; and a circulator coupled to the signal modulator and the receiver, wherein the circulator is configured to communicate with a node of an integrated network via an optical fiber. A remote node, a communication terminal, and a method of performing integrated network access are also disclosed.

System and method for performing in-service optical network certification

A system and method for performing an in-service optical time domain reflectometry test, an in-service insertion loss test, and an in-service optical frequency domain reflectometry test using a same wavelength as the network communications for point-to-point or point-to-multipoint optical fiber networks while maintaining continuity of network communications are disclosed.

SYSTEM AND METHOD FOR PERFORMING HIGH-SPEED COMMUNICATIONS OVER FIBER OPTICAL NETWORKS

Processing a received optical signal in an optical communication network includes equalizing a received optical signal to provide an equalized signal, demodulating the equalized signal according to an m-ary modulation format to provide a demodulated signal, decoding the demodulated signal according to an inner code to provide an inner-decoded signal, and decoding the inner-decoded signal according to an outer code. Other aspects include other features such as equalizing an optical channel including storing channel characteristics for the optical channel associated with a client, loading the stored channel characteristics during a waiting period between bursts on the channel, and equalizing a received burst from the client using the loaded channel characteristics. 1. A method for m-ary modulation communication across an optical network by an optical transceiver module comprising of:receiving a first electrical binary data signal through a system interface of the optical transceiver module;converting the first electrical binary data signal in the optical transceiver module to a first electrical m-ary modulation signal;amplifying the first electrical m-ary modulation signal to drive an optical transmitter of the optical transceiver module;emitting a first optical signal on a first wavelength responsive to and representative of the amplified first electrical m-ary modulation signal from the optical transmitter of the optical transceiver module;receiving a second optical signal on a second wavelength and producing an electrical signal from an optical detector of the optical transceiver module;amplifying the electrical signal to facilitate clock and data recovery in the optical transceiver module;equalizing the amplified electrical signal and recovering clock data information to produce a second m-ary modulation signal in the optical transceiver module;demodulating the second m-ary modulation signal according to a second electrical binary signal; andtransmitting the ...

Burst-Mode Discrete Multi-Tone for Networks

A method implemented by a first network element (NE) comprises receiving, by a receiver of the first NE, a burst from a second NE, wherein the burst comprises at least one training symbol (TS), storing, by a memory of the first NE, a channel response for a link between the first NE and the second NE, wherein the first NE is communicatively coupled to the second NE, wherein the channel response is based on a current channel response estimated using at least one TS in the burst and a previously stored channel response, and wherein the previously stored channel response is based on a plurality of bursts previously received from the second NE, and compensating, by a processor coupled to the receiver and the memory of the first NE, modulated symbols in the burst using the channel response.

Common Cathode Laser Driving Circuit

A method for biasing a tunable laser during burst-on and burst-off states through a common-cathode laser driving circuit includes delivering a bias current to an anode of a gain-section diode having a shared substrate with the laser, and receiving a burst mode signal indicative of a burst-on state or a burst-off state. When the burst mode signal is indicative of the burst-off state, the method includes sinking a sink current away from the anode of the gain-section diode. The sink current is less than the bias current delivered to the anode of the gain-section diode. When the burst mode signal transitions to be indicative of the burst-on state from the burst-off state, the method includes ceasing the sinking of the sink current away from the anode of the gain-section diode, and delivering an overshoot current to the anode of the gain-section diode to accelerate heating of the gain-section diode. 1. A method comprising:delivering, by a laser driving circuit, a bias current to an anode of a gain-section diode disposed on a shared substrate of a tunable laser;receiving, at the laser driving circuit, a burst mode signal indicative of a burst-on state or a burst-off state;when the burst mode signal is indicative of the burst-off state, sinking, by the laser driving circuit, a sink current away from the bias current at the anode of the gain-section diode, the sink current less than the bias current delivered to the anode of the gain-section diode; andwhen the burst mode signal is indicative of the burst-on state, modulating, by the laser driving circuit, the tunable laser by a capacitively coupled modulation stage of the laser driving circuit to the anode of the gain-section diode, resulting in an alternating current (AC) modulation current.2. The method of claim 1 , further comprising claim 1 , when the burst mode signal transitions to be indicative of the burst-on state from the burst-off state:ceasing, by the laser driving circuit, the sinking of the sink current away ...

Monitoring a multiplexed laser array in an optical communication system

Individual channels of a multiplexed laser array in a multi-channel optical transmitter are monitored at an output of an optical multiplexer. The monitoring may be used to confirm proper operation of each of the channels in the multiplexed laser array and/or to perform wavelength locking on each of the channels. Monitoring at the output of the optical multiplexer avoids the use of multiple photodetectors coupled directly to multiple lasers in the multiplexed laser array. The multiplexed laser array generally includes a plurality of laser emitters optically coupled to an optical multiplexer such as an arrayed waveguide grating (AWG). An optical transmitter with a monitored multiplexed laser array may be used, for example, in an optical line terminal (OLT) in a wavelength division multiplexed (WDM) passive optical network (PON) or in any other type of WDM optical communication system capable of transmitting optical signals on multiple channel wavelengths.

Base station management system and method in next generation mobile communication service

A system for managing a base station in a next generation mobile communication service includes a plurality of remote base stations configured to provide data transmission to a plurality of user terminals in a next generation mobile communication system; a centralized base station configured to perform interlocking among the plurality of remote base stations and perform resource allocation and scheduling for each user terminal; and a remote interlocking element configured to transmit corresponding control and data information to the plurality of remote base stations according to beamforming information and resource allocation information allocated by the centralized base station, and transmit channel information of a user terminal, which is received from the plurality of remote base stations, to the centralized base station.

SYSTEM AND METHOD FOR PERFORMING IN-SERVICE OPTICAL NETWORK CERTIFICATION

A system and method for performing an in-service optical time domain reflectometry test, an in-service insertion loss test, and an in-service optical frequency domain reflectometry test using a same wavelength as the network communications for point-to-point or point-to-multipoint optical fiber networks while maintaining continuity of network communications are disclosed. 1. An optical transceiver for data communication and having optical time domain reflectometry (OTDR) and/or optical frequency domain reflectometry (OFDR) function for optical fiber fault detection using a same first wavelength comprising:a bi-directional optical interface configured to couple to an optical fiber;a bi-directional electrical interface;an optical transmitter optically coupled to the bi-directional optical interface and configured to emit optical signals at the first wavelength;a laser driver electrically coupled to the optical transmitter and electrically coupled to the bi-directional electrical interface and the laser driver configured to electrically drive the optical transmitter responsive to data received through the bi-directional electrical interface;an optical receiver coupled optically to the bi-directional optical interface and configured to receive optical signals at the first wavelength and perform optical-to-electrical conversion of the received optical signals;a transimpedance amplifier (TIA) electrically coupled to the optical receiver and configured to amplify the output of the optical receiver;a data recovery unit electrically coupled to the TIA and wherein the data recovery unit recovers data from the TIA and the data recovery unit is electrically coupled to the bi-directional electrical interface;a controller electrically coupled to the laser driver and wherein the controller is configured to perform an MDR and/or OFDR function by signaling the laser driver to drive the optical transmitter to emit an OTDR/OFDR signal at the first wavelength and the controller is ...

TRANSMISSION DEVICE, TRANSMISSION METHOD, AND TRANSMISSION SYSTEM

A transmission device including a demultiplexer configured to demultiplex a multiplexed light obtained by multiplexing the plurality of wavelength division multiplexing (WDM) optical signals including different wavelength bands into the plurality of WDM optical signals, a plurality of optical amplifiers configured to amplify the plurality of WDM optical signals, respectively, a wavelength converter configured to convert a first wavelength band of the wavelength bands of at least a first WDM optical signal of the plurality of WDM optical signals amplified by the plurality of optical amplifiers into a second wavelength band of the wavelength bands of a second WDM optical signal of the plurality of WDM optical signals so that the second wavelength band does not overlap among the wavelength bands, and a multiplexer configured to multiplex the plurality of WDM optical signals which include the wavelength bands converted by the wavelength converter. 1. A transmission device comprising:a demultiplexer configured to demultiplex a multiplexed light obtained by multiplexing a plurality of wavelength division multiplexing (WDM) optical signals including different wavelength bands into the plurality of WDM optical signals;a plurality of optical amplifiers configured to amplify the plurality of WDM optical signals, respectively;a wavelength converter configured to convert a first wavelength band of the wavelength bands of at least a first WDM optical signal of the plurality of WDM optical signals amplified by the plurality of optical amplifiers into second wavelength band of the wavelength bands of a second WDM optical signal of the plurality of WDM optical signals so that the second wavelength band does not overlap among the wavelength bands; anda multiplexer configured to multiplex the plurality of WDM optical signals which include the wavelength bands converted by the wavelength converter.2. The transmission device according to claim 1 ,wherein a transmission characteristic ...

Station-side terminal apparatus, optical access network, and communication method

The station-side terminal apparatus for the optical access network includes: the station-side terminal apparatus; the subscriber-side terminal apparatuses connected to the station-side terminal apparatus via the optical transmission line; the terminal devices to which mutually different wavelengths are assigned; and the communication failure detecting unit. Each of the terminal devices includes the uplink communication state monitoring unit configured to monitor a state of uplink communication for each registered subscriber-side terminal apparatus, on the basis of the input uplink signal, and the downlink communication failure information extracting unit configured to extract information of a state of downlink communication, which is transmitted from the registered subscriber-side terminal apparatus. The communication failure detecting unit detects a failure of the uplink communication and a failure of the downlink communication, on the basis of the state of the uplink communication and the state of the downlink communication.

Passive optical network communications method, apparatus and system

The present invention discloses a passive optical network communications method, reporting, by an optical network unit, ONU, a calibration record of the ONU, where the calibration record includes an ID of a calibrated wavelength channel; sending a first message to the ONU when the OLT determines, according to the calibration record, that a target wavelength channel ID corresponding to a target wavelength channel to which the ONU needs to switch is not in the calibration record, where the first message includes a forced wavelength switching flag; and instructing the ONU to switch to the calibrated target wavelength channel. In this way, the ONU can implement wavelength switching quickly after calibrating a new wavelength channel so as to perform data communication over the calibrated new wavelength channel.

SYSTEM AND METHODS FOR COHERENT PON ARCHITECTURE AND BURST-MODE RECEPTION

An optical network communication system utilizes a passive optical network including an optical hub having an optical line terminal, downstream transmitter, an upstream receiver, a processor, and a multiplexer. The upstream receiver includes a plurality of TWDMA upstream subreceivers. The system includes a power splitter for dividing a coherent optical signal from the optical hub into a plurality of downstream wavelength signals, a long fiber to carry the coherent optical signal between the optical hub and the power splitter, and a plurality of serving groups. Each serving group includes a plurality of optical network units configured to (i) receive at least one downstream wavelength signal, and (ii) transmit at least one upstream wavelength signal. The system includes a plurality of short fibers to carry the downstream and upstream wavelength signals between the power splitter and the optical network units, respectively. Each upstream subreceiver receives a respective upstream wavelength signal. 1. A burst signal format data structure of a data stream transmitted over a network communication channel for a coherent burst mode receiver , comprising:a data header portion including at least one single-polarization signal data sequence and a training sequence; anda data payload portion including a demodulated data sequence,wherein the demodulated data sequence comprises payload data from the data stream that has been demodulated based on the data header portion.2. The data structure of claim 1 , wherein the demodulated data sequence is based on static information from the at least one single-polarization signal data sequence.3. The data structure of claim 2 , wherein the demodulated data sequence is further based on dynamic information of the network communication channel.4. The data structure of claim 3 , wherein the data stream comprises modulated data from the network communication channel claim 3 , and wherein the burst signal format data structure is configured to ...

OPTICAL SWITCH FOR RADIO ACCESS NETWORK

A switch configured to connect a plurality of remote radio units with a plurality of main units in a radio access network. The switch comprises a first stage comprising one or more first units configured to receive a signal originating from a remote radio unit, and configured to output one or more spectral component having a wavelength. The switch further comprises a central stage configured to receive the one or more optical wavelength, and transfer the spectral component to an output port determined by the wavelength. The switch further comprises a second stage comprising one or more second units configured to receive the one or more spectral component from the central stage and output a signal towards a main unit. The first unit is configured to control the wavelength of the output spectral component such that the spectral component is transferred by the central stage to a selected one of said second units. 1. A switch configured to connect a plurality of remote radio units with a plurality of main units in a radio access network , the switch comprising:a first stage comprising one or more first units configured to receive a signal originating from a remote radio unit, and configured to output one or more spectral component having a wavelength,a central stage configured to receive the one or more optical wavelength, and transfer the spectral component to an output port determined by the wavelength,a second stage comprising one or more second units configured to receive the one or more spectral component from the central stage and output a signal towards a main unit,wherein the first unit is configured to control the wavelength of the output spectral component such that the spectral component is transferred by the central stage to a selected one of said second units.2. The switch as claimed in claim 1 , wherein the one or more first unit further comprises a time or packet domain switch configured to multiplex signals from the remote radio units and the second unit ...

System and method for performing in-service optical network certification

A system and method for performing an in-service optical time domain reflectometry test, an in-service insertion loss test, and an in-service optical frequency domain reflectometry test using a same wavelength as the network communications for point-to-point or point-to-multipoint optical fiber networks while maintaining continuity of network communications are disclosed.

Method And Apparatus For Processing A Communication Signal In An Optical Communication Network

A method and apparatus for processing a communication signal in an optical network. A network node typically includes a transmit train for generating transmissions and a receive train for receiving transmissions from another network node. The network node may be, for example, an OLT or an ONU. In a receiver implementing the described solution, a photodiode is employed to convert received optical signals into electrical signals that are then provided to a TIA or other device for producing a differential output having an inverted output and a non-inverted output. One of the outputs is delayed one bit and attenuated, then combined with the other output to produce an equalized signal for further processing by the receive train. The solution may be analogously applied on the transmit side for introducing pre-distortion, either in addition to or in lieu of in the receiver.

Passive Optical Network Architecture, Method for Passive Optical Network Architecture to Implement Data Transmission, and Optical Network Device

A PON architecture, a method for realizing data transmission with the PON architecture and an optical network device are provided. The PON architecture includes an optical line terminal (OLT) supporting multiple channels, and one or more optical network units (ONUs) supporting one or more channels under a same optical distribution network (ODN). The OLT/ONU is configured to acquire the number of channels and/or corresponding channels supported for transmitting data and transmittable states of the supported channels, distribute the data to be transmitted to one or more supported channels for transmitting, the data is preferentially transmitted on a channel with an earliest transmittable start time point, and transmission end time points of channels for transmitting the data are similar or data transmissions end at a transmittable end time point. The ONU/OLT is configured to receive data on channels supported by ONU/OLT itself and reassemble the data accordingly based on transmission rules.

Dynamically switching queueing schemes for network switches

An example system includes a network switch and a plurality of server computers communicatively coupled to the first network switch. The network switch includes a first transceiver configured to transmit data according to a first maximum throughput, and each server computer includes a respective second transceiver configured to transmit data according to a second maximum throughput that is less than the first maximum throughput. The network switch is configured to transmit, using the first transceiver according to the first maximum throughput, first data including a plurality of optical subcarriers to each of the server computers. Each of the server computers is configured to receive, using a respective one of the second transceivers, the first data from the network switch, and extract, from the first data, a respective portion of the first data addressed to the server computer.

TEST INSTRUMENTS AND METHODS FOR EMULATING OPTICAL NETWORK TERMINAL (ONT) DEVICES AND TESTING OPTICAL NETWORKS BASED ON THE EMULATION

Disclosed are apparatuses and testing methods for emulating an Optical Network Terminal (ONT) device for communicating or otherwise working with an Optical Line Terminal (OLT) device that was configured to operate with the ONT device. Such emulation may include configuring various settings of the apparatus so that the apparatus may appear to the OLT to be the ONT device. For example, the emulation may include accessing and using authentication/authorization related settings and network configuration settings of the ONT, thus permitting the apparatus to connect to a Passive Optical Network and test services and the quality of service experience without having to reconfigure the OLT. 1. A test instrument for emulating an Optical Network Terminal (ONT) , comprising:a data storage to store an ONT model that describes the ONT;a fiber optic interface to couple the test instrument with an Optical Line Terminal (OLT) that controls information flow through an optical data network (ODN), wherein the OLT is to operate with the ONT based on information included in the ONT model; access the ONT model;', 'generate an emulation of the ONT based on the ONT model;', 'connect to the OLT via the fiber optic interface based on the emulation of the ONT without reconfiguration of the OLT to work with the test instrument instead of the ONT; and', 'perform one or more service tests across the ODN based on the connection to the OLT., 'a controller coupled to the fiber optic interface, wherein the controller is to2. The test instrument of claim 1 , wherein the ONT model includes ONT authentication information claim 1 , and wherein to connect to the OLT claim 1 , the controller is to:provide the ONT authentication information to authenticate the test instrument with the OLT.3. The test instrument of claim 2 , wherein the ONT model includes ONT hardware configuration information of the ONT claim 2 , and wherein the controller is to:transmit at least some of the ONT hardware configuration ...

Optical Port Auto-Negotiation Method, Optical Module, Central Office End Device, and Terminal Device

The present application provides an optical port auto-negotiation method, including: a: selecting a downstream to-be-received wavelength; b: listening to a downstream message on the selected downstream to-be-received wavelength, performing c if a wavelength idle message is received, and returning to a if no wavelength idle message is received within a specified or fixed time, where the wavelength idle message is used to identify that the wavelength is not occupied or not allocated; c: sending a wavelength application message on an upstream wavelength, performing d if a wavelength grant message is received in a downstream direction; otherwise, going back to a or b, where the wavelength application message is used to identify a request for allocation of the wavelength, and the wavelength grant message is used to identify acknowledgment of wavelength allocation; and d: setting an optical port auto-negotiation success flag bit. The present application further provides an optical module. 1. A method , comprising:generating a coded interaction message by coding a first interaction message using a random code;generating a handled interaction message by processing a data signal and the coded interaction message; andtransmitting the handled interaction message.2. The method according to claim 1 , wherein generating the handled interaction message by processing the data signal and the coded interaction message comprises:generating the handled interaction message by performing amplitude modulation on the data signal using the coded interaction message.3. The method according to claim 1 , wherein generating the handled interaction message by processing the data signal and the coded interaction message comprises:generating the handled interaction message by superposing the coded interaction message with the data signal.4. The method according to claim 1 , wherein the random code comprises a plurality of random sequences claim 1 , a first random sequence of the plurality of ...

APPARATUS AND METHODS FOR A TRANSPORT NETWORK

A method in a first level aggregation node of a transport network is disclosed. The transport network comprises the first level aggregation node, a second level aggregation node and a Passive Optical Network. T the method comprises receiving, from the second level aggregation node, a plurality of wavelength division multiplexing (WDM) channels having wavelengths in a first spectrum section and generating at least one passive optical channel having a wavelength in a second spectrum section, different to the first spectrum section. The method further comprises combining at least some of the WDM channels received from the second level aggregation node with the at least one passive optical channel, and forwarding the combined WDM channels and passive optical channel to a termination node in the Passive Optical Network. Also disclosed are a method in a termination node of a transport network, a first level aggregation node, a termination node and a computer program. 1. A method in a first level aggregation node of a transport network , the transport network comprising the first level aggregation node , a second level aggregation node and a Passive Optical Network , the method comprising:receiving, from the second level aggregation node, a plurality of wavelength division multiplexing, WDM, channels having wavelengths in a first spectrum section;generating at least one passive optical channel having a wavelength in a second spectrum section, different to the first spectrum section;combining at least some of the WDM channels received from the second level aggregation node with the at least one passive optical channel; andforwarding the combined WDM channels and passive optical channel to a termination node in the Passive Optical Network.2. A method according to claim 1 , further comprising:inputting the WDM channels received from the second level aggregation node to at least one wavelength selective element, a said wavelength selective element configured to act on a single ...

AMPLIFICATION APPARATUS AND COMMUNICATION SYSTEM

An amplification apparatus includes: a circulator to receive, at a first terminal, first signal light transmitted from OLT to ONU and first light having a predetermined wavelength different from the first signal light and, at a third terminal, second signal light transmitted from ONU to OLT and second light having the predetermined wavelength; a first reflector to output reflected light back to a second terminal; a first optical amplifier to have an amplification band characteristic of amplifying at least the first signal light; a second reflector to output reflected light back to a fourth terminal; a second optical amplifier to have an amplification band characteristic of amplifying the second signal light without amplifying the second light having the predetermined wavelength; and a first partial reflector to have a wavelength transmission characteristic of outputting the light having a wavelength different from the predetermined wavelength to the second optical amplifier. 1. An amplification apparatus provided between an optical line terminal (OLT) and an optical network unit (ONU) , the amplification apparatus comprising:a circulator configured to output light incident on a first terminal from a second terminal, light incident on the second terminal from a third terminal, light incident on the third terminal from a fourth terminal, and light incident on the fourth terminal from the first terminal and to receive, at the first terminal, first signal light transmitted from the OLT to the ONU and first light having a predetermined wavelength different from a wavelength of the first signal light and, at the third terminal, second signal light transmitted from the ONU to the OLT and second light having the predetermined wavelength;a first reflector configured to reflect the light output from the second terminal and to output the reflected light back to the second terminal;a first optical amplifier configured to be provided between the second terminal and the first ...

Optical Device and Hub Node for an Optical Network

An optical device () for an optical network, comprising an optical input (), a passive optical component (), a memory device () for storing information relating to the passive optical component. The optical device further comprises an optical splitter () configured to power split off a portion of received optical signals to form split optical signals and to output the remaining optical power of received optical signals to the passive optical component and a photodetector () configured to receive the split optical signals and to generate a corresponding photodetector output signal. Further the optical device comprises an accumulator () configured to be charged by the photodetector output signal, a laser () configured to be powered by the accumulator and a controller () configured to, in response to a trigger from the photodetector, read said information from the memory device and to cause the laser to transmit an optical signal from an optical output (), the optical signal carrying a message based on said information read from the memory device. 120-. (canceled)21. An optical device for an optical network , comprising:an optical input for receiving optical signals;a passive optical component;memory for storing information relating to the passive optical component;an optical splitter configured to power split off a portion of received optical signals to form split optical signals and to output the remaining optical power of received optical signals to the passive optical component;a photodetector configured to receive the split optical signals and configured to generate a corresponding photodetector output signal;an accumulator configured to be charged by the photodetector output signal;a laser configured to be powered by the accumulator;a controller configured to, in response to a trigger from the photodetector, read the information from the memory and to cause the laser to transmit an optical signal carrying a message based on the information read from the memory; ...

Wavelength Division Multiplexing Filter for Multiplexing or Demultiplexing Using Cascaded Frequency Shaping

A wavelength division multiplexing filter comprises: a first multi-order Mach-Zehnder interferometer comprising a plurality of first-order Mach-Zehnder interferometers, and a second multi-order Mach-Zehnder interferometer comprising a plurality of first-order Mach-Zehnder interferometers; wherein the first multi-order Mach-Zehnder interferometer and the second multi-order Mach-Zehnder interferometer are included in a group of multiple multi-order Mach-Zehnder interferometers arranged within a binary tree arrangement, the binary tree arrangement comprising: a first set of a plurality of multi-order Mach-Zehnder interferometers, the first set including the first multi-order Mach-Zehnder interferometer, and having an associated spectral response with a first spacing between adjacent passbands, and a second set of at least twice as many multi-order Mach-Zehnder interferometers as in the first set, the second set including the second multi-order Mach-Zehnder interferometer, and having an associated spectral response with a second spacing between adjacent passbands that is twice the first spacing.

Intelligent subsystem

An intelligent subsystem coupled with a system-on-chip (comprising a microprocessor/graphic processor), a radio transceiver, a voice processing module/voice processing algorithm, a foldable display, a near-field communication device, a biometric sensor and an intelligent learning algorithm is disclosed. The intelligent subsystem can respond to a user's interests and/or preferences. Furthermore, the intelligent subsystem is sensor-aware or context-aware.

Hybrid Fiber Coaxial Node

Digital information can be carried on the fiber leg of an access network using binary modulation. Binary modulated data received at an O/E node can then be modulated onto an analog waveform using quadrature amplitude modulation or some other technique for modulating an analog waveform and transmitted over, for example, the coaxial leg of the network. The O/E node may also receive an analog signal, over the coaxial leg, modulated to carry upstream data from subscriber devices. The O/E node may demodulate the upstream signal to recover the upstream data and forward that upstream data over the fiber leg using a binary modulated optical signal. 1. A method comprising:receiving, by a computing device via a first network and a first media access control (MAC) protocol, a plurality of signals, wherein at least one signal of the plurality of signals comprises a first set of data blocks formatted in accordance with the first MAC protocol, and wherein at least one signal of the plurality of signals comprises a second set of data blocks formatted in accordance with a second MAC protocol different from the first MAC protocol;sending, to at least one user device via a second network, the first set of data blocks formatted in accordance with the first MAC protocol; andsending, to at least one user device via the second network, the second set of data blocks formatted in accordance with the second MAC protocol.2. The method of claim 1 , further comprising:determining, based on a header field associated with the first MAC protocol, a radio-frequency channel associated with the second set of data blocks and the second MAC protocol.3. The method of claim 1 , wherein the second MAC protocol is associated with transmission via an electrical medium claim 1 , and the first MAC protocol is associated with transmission via both an optical medium and an electrical medium.4. The method of claim 1 , further comprising:determining, based on an order of data blocks of a signal of the plurality ...

Multi-Wavelength Laser System for Optical Data Communication Links and Associated Methods

A laser light generator is configured to generate one or more wavelengths of continuous wave laser light. The laser light generator is configured to collectively and simultaneously transmit each of the wavelengths of continuous wave laser light through an optical output of the laser light generator as a laser light supply. An optical fiber is connected to receive the laser light supply from the optical output of the laser light generator. An optical distribution network has an optical input connected to receive the laser light supply from the optical fiber. The optical distribution network is configured to transmit the laser light supply to each of one or more optical transceivers and/or optical sensors. The laser light generator is physically separate from each of the one or more optical transceivers and/or optical sensors. 1. A laser light supply system for fiber-optic data communication , comprising:a laser light generator configured to generate a plurality of wavelengths of continuous wave laser light, the laser light generator being physically separate from any transmitter element configured to convert a data signal from an electrical domain to an optical domain, the laser light generator being physically separate from any receiver element configured to convert a data signal from the optical domain to the electrical domain, the laser light generator directing the plurality of wavelengths of continuous wave laser light to an optical output of the laser light generator;an optical conveyance device having a first end optically connected to the optical output of the laser light generator; andan optical distribution network having an optical input connected to a second end of the optical conveyance device, the optical distribution network configured to transmit each of the plurality of wavelengths of continuous wave laser light generated by the laser light generator to each of multiple transceivers.2. The laser light supply system for fiber-optic data communication ...

Re-Modulation Crosstalk and Intensity Noise Cancellation in Wavelength-Division Multiplexing (WDM) Passive Optical Networks (PONs)

An apparatus comprising a signal generator configured to produce a modulation signal, a filter coupled to the signal generator and configured to filter the modulation signal to produce a cancellation signal, and a reflective semiconductor optical amplifier (RSOA) coupled to the signal generator and the filter, wherein the RSOA is configured to generate an optical signal according to a difference between the modulation signal and the cancellation signal and transmit the optical signal towards a partial reflection mirror (PRM). 1. An apparatus comprising:a signal generator configured to produce a modulation signal;a filter coupled to the signal generator and configured to filter the modulation signal to produce a cancellation signal; and generate an optical signal according to a difference between the modulation signal and the cancellation signal; and', 'transmit the optical signal towards a partial reflection mirror (PRM)., 'a reflective semiconductor optical amplifier (RSOA) coupled to the signal generator and the filter, wherein the RSOA is configured to2. The apparatus of claim 1 , wherein the RSOA is further configured to receive a reflected signal comprising a portion of the transmitted optical signal reflected from the PRM claim 1 , and wherein the cancellation signal is an estimate of a previous reflected signal.3. The apparatus of claim 1 , wherein the filter comprises a filter response comprising:an optical-to-optical response of the RSOA;a scaling component associated with a power reflection coefficient of the PRM; anda delay component associated with a round-trip delay between the RSOA and the PRM.4. The apparatus of claim 1 , wherein the filter comprises:an attenuator coupled to the differentiator and configured to attenuate the modulation signal;a delay unit coupled to the attenuator and the differentiation unit, wherein the delay unit is configured to delay the modulation signal by a time duration equal to a round-trip delay between the RSOA and the PRM ...

Passive optical network reach extender based on wavelength tunable optical module and method thereof

Provided are a passive optical network reach extender based on a wavelength tunable optical module and a method thereof. According to an embodiment of the invention, a passive optical network reach extender includes a first optical splitter configured to receive an optical signal from an optical line terminal and split the signal into optical signals having a multiplexed wavelength, a wavelength tunable remote relay configured to receive the optical signals split from the first optical splitter, and select and control an available wavelength for each port, a wavelength multiplexer configured to multiplex a wavelength of the optical signal output from the wavelength tunable remote relay, and a second optical splitter configured to split the optical signal multiplexed by the wavelength multiplexer into a plurality of optical network units.

Management System for GPON Based Services

A computerized system and method for managing a passive optical network (PON) is disclosed. The system includes a detection and analysis module adapted for receiving uploaded measurement data from an optical line terminal (OLT) and at least one optical network terminal (ONT), and at least one of technical tools data, service failure data, and outside plant data. The detection and analysis module is adapted for determining a source of failure or potential failure in the PON by correlating the uploaded measurement data and the at least one of technical tools data and service failure data with information stored in a memory medium for the OLT and each ONT.

Management System for GPON Based Services

A computerized system and method for managing a passive optical network (PON) is disclosed. The system includes a detection and analysis module adapted for receiving uploaded measurement data from an optical line terminal (OLT) and at least one optical network terminal (ONT), and at least one of technical tools data, service failure data, and outside plant data. The detection and analysis module is adapted for determining a source of failure or potential failure in the PON by correlating the uploaded measurement data and the at least one of technical tools data and service failure data with information stored in a memory medium for the OLT and each ONT.

Method and system for determining and controlling power of optical transmitter of optical network unit for time and wavelength division multiplexing passive optical network

Disclosed are a method and system for determining and controlling power of an optical transmitter of an optical network unit (ONU) for a time and wavelength division multiplexing passive optical network (TWDM-PON). The system includes an RSSI collector configured to collect received signal strength indication (RSSI) information from upstream optical signals received from the ONUs connected to optical line terminal (OLT) ports, an ONU power level determiner configured to gather the pieces of RSSI information about the ONUs from the RSSI collector, and to determine power of optical transmitters of the ONUs based on the gathered information, and a power mode controller configured to receive power mode setting information of the optical transmitters of the ONUs from the ONU power level determiner, and to generate a physical layer operation and maintenance (PLOAM) message to control power modes of the ONUs based on the received power mode setting information.

TRUNK MANAGEMENT IN SIMULATED FIBRE CHANNEL TRUNKING SYSTEM ENVIRONMENT

In a Fibre channel (FC) networking system, a first FC networking device includes a first Ethernet switch processor and a first FC PHY converter that is communicatively coupled to the first Ethernet switch processor via a first plurality of Ethernet links, where the first plurality of Ethernet links is grouped as a first Ethernet aggregation interface. A second FC networking device is communicatively coupled to the first FC networking device via a plurality of FC links, where each Ethernet link of the first plurality of Ethernet links is mapped to a corresponding FC link of the plurality of FC links. The first FC networking device is configured to: generate only one FLOGI for a FC trunk associated with the first Ethernet aggregation interface; and hash the FLOGI among the first plurality of Ethernet links so as to the second FC networking device via the first Ethernet aggregation interface. 1. An information handling system for managing a communication trunk in a fibre channel (FC) networking system , comprising:a first networking device including a first switch processor and a first converter that is communicatively coupled to the first switch processor via a first plurality of Ethernet links, the first plurality of Ethernet links being grouped as a first Ethernet aggregation interface, the first networking device being configured to load balance a first data traffic across the first plurality of Ethernet links; anda second networking device that is communicatively coupled to the first networking device via a plurality of FC links, each Ethernet link of the first plurality of Ethernet links being mapped to a corresponding FC link of the plurality of FC links, generate only one fiber login (FLOGI) for a FC trunk associated with the first Ethernet aggregation interface; and', 'send the FLOGI to the second networking device via the first Ethernet aggregation interface., 'wherein the first networking device is configured to2. The information handling system of claim 1 , ...

SPECTRAL ANALYSIS SIGNAL IDENTIFICATION

A telecommunications system may include a measurement receiver to confirm the presence of a MIMO signal prior to decoding signals to avoid decoding spectrum that does not include MIMO signals. The measurement receiver may determine a fast Fourier transform (FFT) spectrum for asynchronous wideband digital signals received from two or more ports. The measurement receiver may determine an average FFT spectrum based on the determined FFT spectrum and identify a bandwidth of signals present in the average FFT spectrum. The measurement receiver may identify the MIMO signals present in the bandwidth of signals and decode only the identified MIMO signals. 1. A method , comprising:receiving asynchronous wideband digital signals from two or more ports of a telecommunications system communicatively coupled to at least one base station;determining, for each of the asynchronous wideband digital signals, a wideband fast Fourier transform (FFT) spectrum;determining an average FFT spectrum for each of the two or more ports based on the wideband FFT spectrum for each of the two or more ports;identifying a bandwidth of signals present in the average FFT spectrum for each of the two or more ports;identifying MIMO signals present in the bandwidth of signals; anddecoding the MIMO signals.2. The method of claim 1 , wherein decoding the MIMO signals includes decoding claim 1 , by a measurement receiver claim 1 , only the MIMO signals present in the bandwidth of signals and not decoding non-MIMO signals present in the bandwidth of signals.3. The method of claim 1 , wherein capturing the asynchronous wideband digital signals includes receiving claim 1 , by a measurement receiver claim 1 , wideband digital signals from the two or more ports at varying time intervals and storing signal information representative of the wideband digital signals in a memory of the measurement receiver.4. The method of claim 1 , wherein the average FFT spectrum is determined by applying one or more windows to ...

STRIPING OF SIGNAL TO GROUPS OF NODES FOR FLEXIBLE SERVICE GROUP SIZING

In one embodiment, a first group of splitters receives a group of signals from a group of transmitters. Each splitter in the first group of splitters splits a signal into a plurality of signals that are sent to a plurality of multiplexers. A multiplexer in the plurality of multiplexers receives one of the plurality of signals from each splitter in the group of splitters and multiplexes the received one of the plurality of signals into a multiplexed signal. The multiplexer sends the multiplexed signal through a single connection in which upstream signals are sent to a group of nodes and downstream signals are received from the group of nodes. A de-multiplexer de-multiplexes the multiplexed signal into the group of signals and sends the group of signals to the group of nodes via a second group of splitters that are connected to the group of nodes. 1. A system comprising:a first group of splitters configured to receive a group of signals from a group of transmitters, wherein each splitter in the first group of splitters is configured to split a signal into a plurality of signals that are sent to a plurality of multiplexers; and the multiplexer is configured to send the multiplexed signal through a single connection in which upstream signals are sent to a group of nodes and downstream signals are received from the group of nodes, and', 'a de-multiplexer de-multiplexes the multiplexed signal into the group of signals and sends the group of signals to the group of nodes via a second group of splitters that are connected to the group of nodes., 'a multiplexer in the plurality of multiplexers configured to receive one of the plurality of signals from each splitter in the group of splitters and multiplex the received one of the plurality of signals into a multiplexed signal, wherein2. The method of claim 1 , wherein the de-multiplexer comprises a first de-multiplexer and the multiplexer comprises a first multiplexer claim 1 , the method further comprising:a second de- ...

METHOD AND SYSTEM FOR SCHEDULING CASCADED PON

One embodiment provides an apparatus for coupling between a trunk passive optical network (PON) and a leaf PON. The apparatus includes a trunk-side optical transceiver coupled to the trunk PON, a leaf-side optical transceiver coupled to the leaf PON, and an integrated circuit chip that includes an optical network unit (ONU) media access control (MAC) module, an optical line terminal (OLT) MAC module, and an on-chip memory. 1. An apparatus for coupling between a trunk passive optical network (PON) and a leaf PON , comprising:a pluggable uplink module coupled to the trunk PON, wherein the pluggable uplink module comprises a trunk-side optical transceiver; a leaf-side optical transceiver;', 'an integrated circuit chip that includes an optical network unit (ONU) media access control (MAC) module, an optical line terminal (OLT) MAC module, and an on-chip memory; and, 'a pluggable downlink module coupled to the leaf PON, wherein the pluggable downlink module comprisesa printed circuit board (PCB) coupling together the pluggable uplink module and the pluggable downlink module.2. The apparatus of claim 1 , wherein the pluggable uplink module includes one of:a small form-factor pluggable (SFP) optical transceiver;a quad SFP (QSFP) optical transceiver;an enhanced small form-factor pluggable (SFP+) optical transceiver; anda 10 Gigabit small form-factor pluggable (XFP) optical transceiver.3. The apparatus of claim 1 , wherein the pluggable downlink module has a standard form factor that is in compliance with one of:a small form-factor pluggable (SFP) specification;a quad SFP (QSFP) specification;an enhanced small form-factor pluggable (SFP+) specification; anda 10 Gigabit small form-factor pluggable (XFP) specification.4. The apparatus of claim 1 , wherein the trunk PON and the leaf PON are running at different data rates.5. The apparatus of claim 1 , receive, from the trunk PON, a bandwidth-assigning frame dedicated to a single logical link in the leaf PON, wherein the band- ...

WAVELENGTH SWITCHING AND CONFIGURATION METHOD AND DEVICE FOR PASSIVE OPTICAL NETWORK

Provided are wavelength switching and configuration methods and devices for a Passive Optical Network (PON). The switching method includes the following operations. An Optical Network Unit (ONU) responds to a ranging request message sent by an Optical Line Terminal (OLT) on a first uplink wavelength supported by the ONU. The ONU receives ranging information sent by the OLT. The ONU uses the received ranging information as ranging information about a second uplink wavelength of the ONU, and performs data transmission on the second uplink wavelength according to a bandwidth allocation from the OLT. A path transmission time difference caused by a wavelength interval between the first uplink wavelength and the second uplink wavelength is less than a corresponding fault tolerance range when the OLT receives data. The ranging information is obtained by the OLT according to a ranging response sent by the ONU on the first uplink wavelength. 1. A wavelength switching method for a Passive Optical Network (PON) , comprising:responding, by an Optical Network Unit (ONU), to a ranging request message sent by an Optical Line Terminal (OLT) on a first uplink wavelength supported by the ONU;receiving, by the ONU, ranging information sent by the OLT; andusing, by the ONU, the received ranging information as ranging information about a second uplink wavelength of the ONU, and performing data transmission on the second uplink wavelength according to a bandwidth allocation from the OLT,wherein a path transmission time difference caused by a wavelength interval between the first uplink wavelength and the second uplink wavelength is less than a corresponding fault tolerance range when the OLT receives data, and the ranging information is obtained by the OLT according to a ranging response sent by the ONU on the first uplink wavelength.2. The method according to claim 1 , wherein switching claim 1 , by the ONU claim 1 , a sending wavelength to the second uplink wavelength supported by the ...

Fiber communication systems and methods

An injection locked transmitter for an optical communication network includes a master seed laser source input substantially confined to a single longitudinal mode, an input data stream, and a laser injected modulator including at least one slave laser having a resonator frequency that is injection locked to a frequency of the single longitudinal mode of the master seed laser source. The laser injected modulator is configured to receive the master seed laser source input and the input data stream, and output a laser modulated data stream.

INTELLIGENT SUBSYSTEM IN ACCESS NETWORKS

An intelligent subsystem includes a system-on-chip (comprising a microprocessor/graphic processor), a radio transceiver, a voice processing module/voice processing algorithm and an intelligent learning algorithm. The intelligent subscriber subsystem can respond to a user's interests and/or preferences. Furthermore, the intelligent subscriber subsystem is sensor-aware or context-aware. 1. An intelligent subsystem ,wherein the intelligent subsystem is coupled by a wireless network or a sensor network,wherein the intelligent subsystem comprises: 'wherein the system-on-a-chip (SoC) comprises: a microprocessor and/or a graphic processor;', '(a) a system-on-a-chip (SoC),'}(b) a radio transceiver or a sensor module; 'wherein the said algorithm comprises: a first set of instructions to process a voice command, stored in a non-transitory media of the intelligent subsystem;', '(c) a voice processing module or a voice processing algorithm,'}wherein the intelligent subsystem is further coupled with or comprises: 'wherein the said algorithm comprises: a second set of instructions to understand the voice command in a natural spoken language, stored in the non-transitory media of the intelligent subsystem; and', '(d) a natural language algorithm,'} wherein the said algorithm comprises: an artificial intelligence algorithm or a machine learning algorithm,', 'wherein the said algorithm comprises: a third set of instructions to provide intelligence to the intelligent subsystem, stored in the non-transitory media of the intelligent subsystem., "(e) a learning algorithm or an intelligence algorithm for providing intelligence to the intelligent subsystem in response to a user's interest or preference,"}2. The intelligent subsystem according to claim 1 , further coupled with or comprises: an algorithm for providing an automatic search on the internet in response to the user's interest or preference claim 1 ,wherein the said algorithm comprises: a fourth set of instructions to provide the ...

Wavelength Stabilizer For TWDM-PON Burst Mode DBR Laser

An optical network unit (ONU) comprising a media access controller (MAC) configured to support biasing a laser transmitter to compensate for temperature related wavelength drift receiving a transmission timing instruction from an optical network control node, obtaining transmission power information for the laser transmitter, estimating a burst mode time period for the laser transmitter according to the transmission timing instruction, and calculating a laser phase fine tuning compensation value for the laser transmitter according to the burst mode time period and the transmission power information, and forwarding the laser phase fine tuning compensation value toward a bias controller to support biasing a phase of the laser transmitter. 1. A method implemented in a passive optical network (PON) comprising:transmitting an optical signal in the PON via a laser transmitter utilizing time and wavelength division multiplexing (TWDM); anddynamically compensating for a red-shift in a wavelength of the optical signal associated with an increase in temperature of the laser transmitter associated with a duration of an optical signal burst,wherein compensation is performed by introducing a blue-shift wavelength bias to the laser transmitter.2. The method of claim 1 , wherein compensating for the red-shift in the wavelength comprises:obtaining optical transmission power information based on real-time measurement of photo-current across a photodiode of the laser transmitter;estimating a burst mode time period according to received timeslot instructions; andcalculating an injection current for use as the blue-shift wavelength bias to compensate for the wavelength red-shift based on the estimated burst mode time period and the optical transmission power information.3. The method of claim 2 , wherein calculating the injection current for use as the blue-shift wavelength bias is performed by a media access controller (MAC).4. The method of claim 3 , wherein compensating for the red- ...

METHOD AND DEVICE FOR TRANSPARENT CONNECTION OF DIFFERENT DWDM SYSTEMS BY NxN AWGs

A system for connecting two or more dense wavelength division multiplex (DWDM) systems in an optically transparent manner includes a first DWDM system with a first optical line amplifier (OLA) for amplifying the signal to be transmitted and a second DWDM system which has a second OLA for amplifying the signal to be transmitted. The first OLA and the second OLA are connected to each other via a passive N×N AWG, arrayed waveguide grating.

Switching Circuit for Burst-mode Tunable Laser

A method () for tuning a tunable laser () includes delivering a bias current (I) to an anode of a distributed Bragg reflector (DBR) section diode (D) disposed on a shared substrate of the tunable laser and receiving a burst mode signal () indicative of a burst-on state or a burst-off state. When the burst mode signal is indicative of the burst-off state, the method includes offsetting the bias current at the anode of the DBR section diode by one of sourcing a push current with the bias current to the anode of the DBR section diode or sinking a pull current away from the bias current at the anode of the DBR section diode. When the burst mode signal is indicative of the burst-on state, the method also includes ceasing any offsetting of the bias current at the anode of the DBR section diode. 1. A method for tuning a tunable laser , the method comprising:delivering, by a switching circuit, a bias current to an anode of a distributed Bragg reflector (DBR) section diode disposed on a shared substrate of the tunable laser;receiving, at the switching circuit, a burst mode signal indicative of a burst-on state or a burst-off state; sourcing a push current with the bias current to the anode of the DBR section diode; or', 'sinking a pull current away from the bias current at the anode of the DBR section diode; and, 'when the burst mode signal is indicative of the burst-off state, offsetting, by the switching circuit, the bias current at the anode of the DBR section diode by one ofwhen the burst mode signal is indicative of the burst-on state, ceasing, by the switching circuit, any offsetting of the bias current at the anode of the DBR section diode.2. The method of claim 1 , wherein:the bias current at the anode of the DBR section diode causes the tunable laser to transmit on a first channel associated with a working wavelength when the burst mode signal is indicative of the burst-on state; andthe offsetting of the bias current at the anode of the DBR section diode causes the ...

INTEGRATED MULTI-CHANNEL PHOTONICS TRANSMITTER CHIP HAVING VARIABLE POWER DIVIDERS

An integrated transmitter chip comprising: at least one input port disposed at a first end of the integrated transmitter chip; a first variable power divider optically connected to each input port of the at least one input port; a second and a third variable power dividers optically branched from each first variable power divider; a first and a second optical channel optically branched from the second variable power divider, a third and a fourth optical channel optically branched from the third variable power divider; and at least one WDM optically attached to corresponding optical channels and configured to selectively modify the polarization of and multiplex corresponding optical signals into a output optical signal, wherein a laser beam is launched into an input port, split by corresponding variable power dividers based upon each dividers corresponding splitting ratio, then multiplexed and combined into an output optical signal having dual polarization modes. 1. An integrated transmitter chip comprising:four input ports disposed at a first end of the integrated transmitter chip;a transmitter block optically connected to each input port of the four input ports, a first variable power divider optically connected to the corresponding input port;', 'a second variable power divider and a third variable power divider being optically branched from the first variable power divider, such that the first, second and third variable power dividers are arranged in a cascading formation having two cascading stages, wherein the first, second and third variable power dividers each have a corresponding splitting ratio;', 'a first and second optical channel being optically branched from the second variable power divider;', 'a third and fourth optical channel being optically branched from the third variable power divider; and, 'each transmitter block having a first multiplexing subunit optically connected to two corresponding optical channels and configured to multiplex two ...

MULTIPLEXING TWO SEPARATE OPTICAL LINKS WITH THE SAME WAVELENGTH USING ASYMMETRIC COMBINING AND SPLITTING

An optical communications system includes an optical transmitter and an optical receiver optically coupled to an optical combiner/splitter, the combiner/splitter coupled to optical media; and, another optical transmitter and another optical receiver optically coupled to another optical combiner/splitter, the another combiner/splitter remotely coupled to the optical media; wherein the optical transmitter and the another optical transmitter are configured to transmit optical signals at substantially the same wavelength. 1. An optical communications system comprising:a first optical transmitter and a first optical receiver optically coupled to a first asymmetric optical combiner/splitter, the first asymmetric combiner/splitter coupled to optical media; and each asymmetric combiner/splitter comprises a high transmittance ratio and a low transmittance ratio;', 'the first asymmetric optical combiner/splitter is configured to attenuate a first signal transmitted from the first optical transmitter based on the low transmittance ratio prior to providing the first signal to the optical media;', 'the second asymmetric optical combiner/splitter is configured to attenuate the first signal received from the optical media based on the high transmittance ratio prior to providing the first signal to the first optical receiver;', 'the second asymmetric optical combiner/splitter is configured to attenuate a second signal transmitted from the second optical transmitter based on the low transmittance ratio prior to providing the second signal to the optical media; and', 'the first asymmetric optical combiner/splitter is configured to attenuate the second signal received from the optical media based on the high transmittance ratio., 'a second optical transmitter and a second optical receiver optically coupled to a second asymmetric optical combiner/splitter, the second asymmetric combiner/splitter remotely coupled to the optical media, wherein2. The optical communications system of claim ...

Wireless drop in a fiber-to-the-home network

One embodiment is directed to a wireless drop terminal (WDT) for use in a fiber-to-the-home (FTTH) network. The wireless drop terminal comprises a fiber interface to optically couple the wireless drop terminal to an optical line terminal (OLT) of the FTTH network via at least one optical fiber and a wireless interface communicatively coupled to the fiber interface. The wireless interface is configured to wirelessly communicate with a wireless optical network terminal (W-ONT) over a directional wireless drop. Other embodiments are disclosed.

Subscriber device and light receiving method

A subscriber device includes a demultiplexer configured to demultiplex input wavelength-multiplexed light into a plurality of light signals for each wavelength, a plurality of light receivers configured to receive each of the plurality of light signals obtained through demultiplexing by the demultiplexer and to convert the light signals into electrical signals, a plurality of limiting amplifiers configured to amplify each of the plurality of electrical signals output from the plurality of light receivers, and a plurality of signal selection units configured to select a plurality of signals to be received from among a plurality of amplified signals output from the plurality of limiting amplifiers.

METHODS AND SYSTEMS FOR DELIVERY OF MULTIPLE PASSIVE OPTICAL NETWORK SERVICES

A system for delivering multiple passive optical network services is disclosed. The system includes a first optical transmission service comprising a common wavelength pair routed from a source to each of a plurality of subscribers. The system further includes a second optical transmission service comprising a plurality of unique wavelength pairs, where each of the unique wavelength pairs is routed from the source to a subscriber among the plurality of subscribers. The system delivers the first optical transmission service and the second optical transmission service to the subscriber on a single optical fiber. 1. A system for delivering multiple passive optical network services comprising:a first optical transmission service comprising a common wavelength pair routed from a source to each of a plurality of subscribers; anda second optical transmission service comprising a plurality of unique wavelength pairs, each of the unique wavelength pairs routed from the source to a subscriber among the plurality of subscribers;wherein the first optical transmission service and the second optical transmission service are delivered to the subscriber on a single optical fiber.2. The system of claim 1 , further comprising a wavelength division multiplexer configured to separate each of the unique wavelength pairs of the second optical transmission service onto separate optical fibers.3. The system of claim 2 , further comprising a splitter joining a fiber carrying the common wavelength pair with one of the fibers leading from the wavelength division multiplexer carrying one of the unique wavelength pairs to transmit the common wavelength pair and the unique wavelength pair to the subscriber on the single optical fiber.4. The system of claim 2 , further comprising a second wavelength division multiplexer joining a fiber carrying the common wavelength pair with one of the fibers leading from the wavelength division multiplexer carrying one of the unique wavelength pairs to transmit ...

STATION-SIDE DEVICE AND COMMUNICATION METHOD

A station-side device performs transmission and reception of an optical signal to and from a subscriber-side device, and includes a communication control unit configured to perform optical signal communication using a plurality of wavelengths by wavelength division multiplexing and time division multiplexing; and a registration unit configured to set an acceptance period in at least one wavelength among the plurality of wavelengths, to perform a new registration of a subscriber-side device in response to a registration request of the subscriber-side device received within the acceptance period, and not to set the acceptance period in at least one other wavelength among the plurality of wavelengths. 1. A station-side device configured to perform transmission and reception of an optical signal to and from a subscriber-side device , the station-side device comprising:a communication control unit configured to perform optical signal communication using a plurality of wavelengths by wavelength division multiplexing and time division multiplexing; anda registration unit configured to set an acceptance period in at least one wavelength among the plurality of wavelengths, to perform a new registration of a subscriber-side device in response to a registration request of the subscriber-side device received within the acceptance period, and not to set the acceptance period in at least one other wavelength among the plurality of wavelengths.2. The station-side device according to claim 1 , wherein the registration unit is configured to set the acceptance period in a wavelength having a margin in terms of a delay requirement among the plurality of wavelengths.3. The station-side device according to claim 1 , wherein the registration unit is configured not to set the acceptance period in a wavelength having no margin in terms of a delay requirement among the plurality of wavelengths.4. The station-side device according to claim 1 , wherein the communication control unit is ...

Low Cost Gain Clamped EDFA for TWDM Passive Optical Network Application

A communication system includes a first optical system and a second optical system optically connected to a clamping laser and a pump laser. The first optical system includes first and second optical splitters. The first optical splitter is configured to receive a clamping laser signal from the clamping laser and split the signal into split clamping laser signals. The second optical splitter is configured to receive a pump laser signal from the pump laser and split signal into split pump laser signals. The second optical system is optically connected to the first optical system and includes amplifier systems. Each amplifier system is configured to receive a multiplexed signal. The second optical system includes first and second combiners optically connected to an erbium-doped fiber. The first combiner is optically connected to the first splitter, and the second combiner is optically connected to the second splitter.

DISTRIBUTED WAVE DIVISION MULTIPLEXING SYSTEMS

A distributed wave division multiplexing system includes a first multiplexing device and multiple second multiplexing devices. The first multiplexing device separates Y number of subscriber signals carried over an input line onto X number of channel lines by wavelength. Each of the second multiplexing devices is coupled to the first multiplexing device by one of the channel lines. Each second multiplexing device separates X number of subscriber signals carried over the respective channel line onto Y number of output lines by wavelength. Each of the Y number of wavelengths subscriber signals carried over a first of the channel fibers is associated with a different one of the output fibers of the respective second multiplexing device. Each of the X number of subscriber signals carried over a first of the output fibers of each second multiplexing device is associated with a different one of the channel fibers. 1. A distributed wavelength division multiplexer architecture comprising:a first multiplexing device including a first wave division multiplexer, the first multiplexing device having an input and a plurality of first outputs, the first multiplexing device having a first filter criteria that assigns a respective set of subscriber wavelengths to each first output, each set of subscriber wavelengths being different from each other set of subscriber wavelengths; andsecond wavelength division multiplexers having second inputs coupled to the first outputs of the first multiplexing device, the second wavelength division multiplexers each including a plurality of second outputs and a second filter criteria that assigns a subscriber wavelength from each different set of subscriber wavelengths to each of the second outputs.2. The distributed wavelength division multiplexer architecture of claim 1 , wherein the second wavelength division multiplexers are identical to each other.3. The distributed wavelength division multiplexer architecture of claim 1 , wherein the ...

Thin film filter (tff) embedded waveguide wdm device employing parabola-shaped waveguides

A wavelength-division lightwave multiplexing device, and method of its manufacture, having an embedded filter and two parabola-shaped crossing waveguides, the waveguides providing collimation of light transmitted therein. At least one of the parabola-shaped wave crossing waveguides includes a first port, and a second port, and a widened portion between the first and second ports having a parabola-shaped profile, wherein the widened portion widens from the first port toward a midpoint thereof, and then narrows to the second port. The invention achieves low insertion loss and high spectral isolation while keeping a narrow guard band smaller, and addresses the problem of poor spectral isolation characteristics in the filter-embedded waveguide WDM device when it is adopted to applications requiring a guard band narrower.

Resource Allocation via Wave-front Multiplexing in a PON Network

A data communication system comprises an optical transferring device, optical network units, and user processors. The optical transferring device splits a received optical signal into split optical signals. Each optical network unit transforms a respective split optical signal into M first electronic signals, M>1. Each user processor comprises an input mapping unit to map the respective M first electronic signals into N second electronic signals, N≥M; an equalization processor to equalize the N second electronic signals and generate a set of N equalized electronic signals; a wave-front demultiplexer to perform a wave-front demultiplexing transform on the N equalized electronic signals, and output N wave-front demultiplexed signals, each of the N wave-front demultiplexed signals being a unique linear combination of the N equalized electronic signals; and an output mapping unit to map the N wave-front demultiplexed signals into at least M third digital electronic data signals. 1. A data communication system comprising:an optical transferring device coupled to a first optical fiber to receive and split a first optical signal into a plurality of split optical signals, each of the split optical signals being substantially equivalent to the first optical signal;a set of optical network units coupled to the optical transferring device via optical fibers to receive the split optical signals respectively, each of the optical network units transforming a respective split optical signal into a set of M first digital electronic data signals, M being an integer greater than 1; and a first input mapping unit to receive and dynamically map the respective set of M first digital electronic data signals into a set of N second digital electronic data signals, N being an integer greater than or equal to M;', 'an equalization processor coupled to the first input mapping unit to receive and equalize the N second digital electronic data signals using equalizing weights and generate a set ...

A Security System

There is provided a security system for use at an enclosure containing one or more passive components of an optical communication link. The security system comprises a sensor configured to detect a physical breach of the enclosure, and an optical alert signal generator coupled to the optical communication link. The optical alert signal generator is self-powered, and configured to generate an optical alert signal and transmit the optical alert signal through the optical communication link when a physical breach of the enclosure is detected by the sensor. The optical alert signal is detectable at an entity external to the enclosure and connected to the optical communication link. 117.-. (canceled)18. A security system for use at an enclosure containing one or more passive components of an optical communication link , the security system comprising:a sensor configured to detect a physical breach of the enclosure; and generate an optical alert signal when a physical breach of the enclosure is detected by the sensor; and', 'transmit the optical alert signal through the optical communication link, wherein the optical alert signal is detectable at an entity external to the enclosure and connected to the optical communication link., 'an optical alert signal generator coupled to the optical communication link, wherein the optical alert signal generator is self-powered and is configured to19. The security system according to claim 18 , wherein the optical alert signal is a coded light signal claim 18 , and wherein the optical alert signal generator comprises:a light source configured to emit light;a driver configured to drive the light source upon receiving energy, such that the light source emits the coded light signal based on a modulation signal; anda first optical coupler configured to couple, in the enclosure, the light source to the optical communication link, such that the coded light signal from the light source is coupled into the optical communication link for ...

Management System for GPON Based Services

A computerized system and method for managing a passive optical network (PON) are disclosed. The system includes a detection and analysis module adapted for receiving uploaded measurement data from an optical line terminal (OLT) and at least one optical network terminal (ONT), and at least one of technical tools data, service failure data, and outside plant data. The detection and analysis module is adapted for determining a source of failure or potential failure in the PON by correlating the uploaded measurement data and the at least one of technical tools data and service failure data with information stored in a memory medium for the OLT and each ONT. 1. A method comprising:receiving power level data associated with an optical terminal;identifying a change in a power level received by the optical terminal over time based on the power level data;comparing the power level data associated with the optical terminal with an expected power level; anddetermining whether the optical terminal has malfunctioned based on the identifying and the comparing.2. The method of claim 1 , wherein identifying the change in the power level received by the optical terminal over time based on the power level data comprises:identifying an increase in the power level received by the optical terminal over time.3. The method of claim 1 , wherein comparing the power level data associated with the optical terminal with the expected power level comprises:detecting that the power level received by the optical terminal over time is higher than the expected power level.4. The method of claim 1 , wherein determining whether the optical terminal has malfunctioned based on the identifying and the comparing comprises:determining whether the optical terminal transmits at an incorrect time based on the identifying and the comparing.5. The method of claim 1 , further comprising:comparing the power level data associated with the optical terminal to power level data associated with another optical ...

Channel Bonding in Passive Optical Networks

A method implemented at a transmitter in a passive optical network (PON), the method comprising the transmitter fragmenting a data packet into multiple frames, with each frame of the multiple frames including a data packet preamble, with the data packet preamble including an indicator associated with at least one lane to be used to transmit the data packet and a logical link identifier (LLID), the indicator identifying a first lane selected from a plurality of lanes, identifying at least one frame transmitted over the first lane, and identifying the lane order of the plurality of lanes, and the transmitter transmitting the multiple frames over the plurality of lanes. 1. A method implemented at a transmitter in a passive optical network (PON) , the method comprising:the transmitter fragmenting a data packet into multiple frames, with each frame of the multiple frames including a data packet preamble, with the data packet preamble including an indicator associated with at least one lane to be used to transmit the data packet and a logical link identifier (LLID), the indicator identifying a first lane selected from a plurality of lanes, identifying at least one frame transmitted over the first lane, and identifying the lane order of the plurality of lanes; andthe transmitter transmitting the multiple frames over the plurality of lanes.2. The method of claim 1 , wherein the indicator comprises a synchronization indicator for assisting a receiver device in aligning fragmented packets in a proper order.3. The method of claim 1 , further comprising claim 1 , responsive to fragmenting the data packet into the multiple frames claim 1 , the transmitter replicating the indicator into each lane of the plurality of lanes.4. The method of claim 3 , wherein each indicator is configured to identify a respective set of frames transmitted over a lane in which that indicator has been replicated.5. The method of claim 4 , wherein each indicator is further configured to indicate that ...

Providing digital data services in optical fiber-based distributed radio frequency (rf) communications systems, and related components and methods

Optical fiber-based distributed communications systems that provide and support both RF communication services and digital data services are disclosed herein. The RF communication services and digital data services can be distributed over optical fiber to client devices, such as remote antenna units for example. In certain embodiments, digital data services can be distributed over optical fiber separate from optical fiber distributing RF communication services. In other embodiments, digital data services can be distributed over common optical fiber with RF communication services. For example, digital data services can be distributed over common optical fiber with RF communication services at different wavelengths through wavelength-division multiplexing (WDM) and/or at different frequencies through frequency-division multiplexing (FDM). Power distributed in the optical fiber-based distributed communications system to provide power to remote antenna units can also be accessed to provide power to digital data service components.

DIGITAL OPTICAL TRANSMITTER FOR DIGITIZED NARROWCAST SIGNALS

Methods and apparatuses are provided to modify existing overlay system architectures in a cost effective manner to meet the growing demand for narrowcast services and to position the existing overlay systems for additional future modifications. The implementations of the improved overlay system of this disclosure re-digitize narrowcast analog signals after they have been QAM modulated and upconverted to RF frequencies and replace the analog narrowcast transmitters with digital narrowcast transmitters. In the fiber nodes, the received narrowcast signals are converted back to analog signals and combined with analog broadcast signals for transmission to the service groups. 12-. (canceled)3. A fiber node comprising:a receiver configured to receive and convert an optical analog-modulated signal comprising one or more up-converted analog RF signals to a first RF electrical analog signal;a converter configured to receive and convert an optical digitally-modulated signal comprising one or more digital signals to a second RF electrical analog signal; anda combiner configured to combine the first RF electrical analog signal and the second RF electrical analog signal.4. The fiber node of further comprising a demultiplexer configured to receive a multiplexed signal comprising the optical analog-modulated signal and the optical digitally-modulated signal wherein the demultiplexer is configured to demultiplex the optical analog-modulated signal and the optical digitally-modulated signal and deliver the demultiplexed signals to the receiver and the converter respectively.5. The fiber node of wherein the receiver is configured to convert the optical analog-modulated signal to the first RF electrical analog signal at a first predetermined signal level.6. The fiber node of wherein the receiver is configured to change the first predetermined signal level.7. The fiber node of wherein the converter is configured to convert the optical digitally-modulated signal to the second RF ...

Wdm/tdm-pon system and transmission start time correction method thereof

A transmission start time correction method of a WDM/TDM-PON system includes: a completion instruction procedure in which a station-side subscriber accommodation apparatus issues an instruction using a downstream signal for instructing a subscriber apparatus to perform wavelength switching, the downstream signal including a transmission start time of an upstream signal indicating completion of the wavelength switching of the subscriber apparatus, the upstream signal being transmitted by the subscriber apparatus after the wavelength switching; an instruction completion transmission procedure in which the subscriber apparatus transmits the upstream signal indicating the completion of the wavelength switching at a wavelength after switching at the instructed transmission start time after the wavelength switching is completed in accordance with the instruction; and a transmission start time correction procedure in which the station-side subscriber accommodation apparatus measures a reception time of the upstream signal indicating the completion of the wavelength switching received after the wavelength switching and sets a time obtained by adding a time twice a time difference between a reception time of the upstream signal indicating the completion of the wavelength switching assumed before the wavelength switching and a reception time of the upstream signal indicating the completion of the wavelength switching received after the wavelength switching to the transmission start time of the upstream signal before the wavelength switching as a new transmission start time.

Temperature Control Of An Optical Device

The present disclosure is directed to an optical device including at least one temperature-dependent tunable element for controlling a wavelength of an optical signal, a first temperature control circuit for controlling a temperature of a first region of the optical device; and a second temperature control circuit for controlling a temperature of a second region of the optical device. The second region may include a portion of the first region. The second region may be smaller than the first region. The tunable element may be positioned in the second region such that a temperature of the tunable element is controlled based on the second temperature control circuit controlling the temperature of the second region. The tunable element may be one of (i) a laser for transmitting an outgoing optical signal and (ii) an optical filter coupled to a photodetector for receiving an incoming optical signal. 1. An optical device comprising:at least one temperature-dependent tunable element for controlling a wavelength of an optical signal, wherein the tunable element is one of (i) a laser for transmitting an outgoing optical signal and (ii) an optical filter coupled to a photodetector for receiving an incoming optical signal;a first temperature control circuit for controlling a temperature of a first region of the optical device; anda second temperature control circuit for controlling a temperature of a second region of the optical device, wherein the second region includes a portion of the first region, wherein the second region is smaller than the first region, and wherein the tunable element is positioned in the second region such that a temperature of the tunable element is controlled based on the second temperature control circuit controlling the temperature of the second region.2. The optical device of claim 1 , wherein at least one of the first and second temperature control circuits is a thermoelectric cooler.3. The optical device of claim 1 , wherein the second ...

Burst Mode Laser Driving Circuit

A method ( 900 ) includes a gain current (I GAIN ) to an anode of a gain-section diode (D 0 ) disposed on a shared substrate of a tunable laser ( 310 ), delivering a modulation signal to an anode of an Electro-absorption section diode (D 2 ) disposed on the shared substrate of the tunable laser, and receiving a burst mode signal ( 330 ) indicative of a burst-on state or a burst-off state. When the burst mode signal is indicative of the burst-off state, the method includes sinking a sink current (I SINK ) away from the gain current at the anode of the gain-section diode. When the burst mode signal transitions to be indicative of the burst-on state from the burst-off state, the method includes ceasing the sinking of the sink current away from the gain current and delivering an overshoot current (I OVER ) to the anode of the gain-section diode.

SYSTEM AND METHOD FOR PERFORMING HIGH-SPEED COMMUNICATIONS OVER FIBER OPTICAL NETWORKS

Processing a received optical signal in an optical communication network includes equalizing a received optical signal to provide an equalized signal, demodulating the equalized signal according to an m-ary modulation format to provide a demodulated signal, decoding the demodulated signal according to an inner code to provide an inner-decoded signal, and decoding the inner-decoded signal according to an outer code. Other aspects include other features such as equalizing an optical channel including storing channel characteristics for the optical channel associated with a client, loading the stored channel characteristics during a waiting period between bursts on the channel, and equalizing a received burst from the client using the loaded channel characteristics. 1. A pluggable optical transceiver module comprising of:an electrical system interface for receiving a first electrical data signal and for transmitting a second electrical data signal, andan encoder unit for coding the first electrical data signal according to an error correcting code to produce a first electrical encoded data signal, andan m-ary modulator for increasing the number of bits per symbol in the first electrical encoded data signal to produce a first m-ary modulation signal, anda digital to analog converter for converting the first m-ary modulation signal to a first electrical m-ary analog modulation signal, anda driver for amplifying the first electrical m-ary analog modulation signal to an amplified first electrical m-ary analog modulation signal to drive an optical transmitter, andthe optical transmitter for emitting a first optical signal on a first wavelength responsive to and representative of the amplified first electrical m-ary analog modulation signal from the driver, andan optical detector for receiving a second optical signal on a second wavelength and producing an electrical analog signal, andan amplifier for amplifying the electrical analog signal to an amplified electrical analog ...

METHODS, SYSTEMS, AND DEVICES FOR INTEGRATING WIRELESS TECHNOLOGY INTO A FIBER OPTIC NETWORK

The present disclosure relates to a fiber optic network configuration having an optical network terminal located at a subscriber location. The fiber optic network configuration also includes a drop terminal located outside the subscriber location and a wireless transceiver located outside the subscriber location. The fiber optic network further includes a cabling arrangement including a first signal line that extends from the drop terminal to the optical network terminal, a second signal line that extends from the optical network terminal to the wireless transceiver, and a power line that extends from the optical network terminal to the wireless transceiver. 1. (canceled)2. A cabling configuration comprising:a furcation member including a first end and an opposite second end, the furcation member defining an interior;a trunk section that extends into the interior of the lineation member at the first end of the furcation member;a first branch section that extends into the interior of the furcation member at the second end of the furcation member, the first branch section being configured to transfer electrical power;a second branch section that extends into the interior of the furcation member at the second end of the furcation member, the second branch section having a connectorized end that includes a hardened fiber optic connector;a power transmission path that extends through the first branch section, the furcation member, and the trunk section; andan optical transmission path that extends though the second branch section, the furcation member, and the trunk section.3. The cabling configuration of claim 2 , further comprising a ground transmission path that extends through the first branch section claim 2 , the furcation member claim 2 , and the trunk section.4. The cabling configuration of claim 2 , wherein the power transmission path includes a dedicated power line.5. The cabling configuration of claim 2 , wherein the power transmission path does not have a ...

Optical line terminal arrangement, apparatus and methods

A wavelength division multiplexed optical communication system includes a plurality of optical line terminals which may be part of separate in service networks, each having a line interface and an all-optical pass-through interface including a plurality of pass-through optical ports, and each also including a plurality of local optical ports which are connectable to client equipment and an optical multiplexer/demultiplexer for multiplexing/demultiplexing optical wavelengths. The optical multiplexer/demultiplexer may include one or more stages for inputting/outputting individual wavelengths or bands of a predetermined number of wavelengths, or a combination of bands and individual wavelengths. At least one of the pass-through optical ports of an optical line terminal of one network may be connected to at least one of the pass-through optical ports of an optical line terminal of another network to form an optical path from the line interface of the optical line terminal of the one network to the line interface of the optical line terminal of the another network to form a merged network. The use of such optical line terminals allows the upgrading and merging of the separate networks while in service.

Multi-Wavelength Laser System for Optical Data Communication Links and Associated Methods

A laser light generator is configured to generate one or more wavelengths of continuous wave laser light. The laser light generator is configured to collectively and simultaneously transmit each of the wavelengths of continuous wave laser light through an optical output of the laser light generator as a laser light supply. An optical fiber is connected to receive the laser light supply from the optical output of the laser light generator. An optical distribution network has an optical input connected to receive the laser light supply from the optical fiber. The optical distribution network is configured to transmit the laser light supply to each of one or more optical transceivers and/or optical sensors. The laser light generator is physically separate from each of the one or more optical transceivers and/or optical sensors. 1. A laser light supply system for fiber-optic data communication , comprising:a laser light generator including a plurality of lasers, each of the plurality of lasers configured to generate a different wavelength of continuous wave laser light relative to others of the plurality of lasers, each of the plurality of lasers being physically separate from any transmitter element configured to convert a data signal from an electrical domain to an optical domain, each of the plurality of lasers being physically separate from any receiver element configured to convert a data signal from the optical domain to the electrical domain, the laser light generator directing the different wavelengths of continuous wave laser light generated by the plurality of lasers to an optical output of the laser light generator;an optical conveyance device having a first end optically connected to the optical output of the laser light generator; andan optical distribution network having an optical input connected to a second end of the optical conveyance device, the optical distribution network configured to transmit each of the different wavelengths of continuous wave ...

Optical network unit, optical access network and a method for exchanging information

A method for exchanging information with an Optical Network Unit (ONU), the method comprising: receiving, by the ONU, downstream signals that comprise a pilot signal and downstream information signals; wherein the downstream information signals embed first polarization modulated information and second polarization modulated information; wherein the pilot signal is received at a pilot frequency slot and the downstream information signals are received at a downstream information frequency slot that differs from the pilot frequency slot; splitting the downstream signals to first, second, third and fourth sets of signals; wherein the splitting comprises performing a polarization based splitting to provide first and second intermediate sets of signals; wherein the first and second sets of signals originate from the first intermediate set of signals and the third and fourth sets of signals originate from the second intermediate set of signals; generating a fifth set of signals by providing the second and fourth sets of signals to a polarization changing circuit, wherein a polarization direction of the fifth set of signals differs from a polarization direction of the first and second intermediate sets of signals; generating first, second and third sets of detection signals, in response to the first, third and fifth sets of signals; and reconstructing the first polarization modulated information and the second polarization modulated information in response to the first, second and third sets of detection signals.

ACTIVATION OF AN OPTICAL NETWORK UNIT IN A MULTI-WAVELENGTH PASSIVE OPTICAL NETWORK

It is disclosed a optical transmitter for an optical network unit of a multi-wavelength passive optical network comprising an optical line termination and a number of further optical network units for transmitting upstream signals to said optical line termination on multiple upstream channels. The optical transmitter is configured to generate and transmit an optical activation signal carrying activation information to be transmitted to said optical line termination on an upstream channel, the activation signal having an optical power lower than the optical power of each one of said upstream signals. The optical transmitter comprises an optical source, a first electric source configured to modulate the optical source with a first electric signal carrying the activation information; and a second electric source configured to directly modulate the optical source with a second electric signal so as to produce a frequency chirp on the optical activation signal. 1. An optical transmitter for an optical network unit of a multi-wavelength passive optical network comprising an optical line termination and a number of further optical network units for transmitting upstream signals to said optical line termination on multiple upstream channels , said optical transmitter being configured to generate and transmit an optical activation signal carrying activation information to be transmitted from said optical network unit to said optical line termination on an upstream channel of said multiple upstream channels , said activation signal having an optical power lower than the optical power of each one of said upstream signals , said optical transmitter comprising an optical source and:a first electric source configured to modulate said optical source with a first electric signal carrying said activation information; anda second electric source configured to directly modulate said optical source with a second electric signal so as to produce a frequency chirp on said optical ...

METHOD AND APPARATUS FOR PROCESSING UPSTREAM DATA ANOMALY

The present document provides a method and apparatus for processing abnormal uplink data, herein, the method includes: a first time wavelength division multiplexing TWDM channel terminal in a TWDM passive optical network PON detecting abnormal uplink data; the first TWDM channel terminal sending uplink data abnormality information to other TWDM channel terminals in the TWDM PON, herein the uplink data abnormality information is used for the other TWDM channel terminals detecting whether uplink data sent by an optical network unit ONU managed by the other TWDM channel terminals are abnormal, and processing the ONU sending the abnormal uplink data when the abnormality is detected, solves the problem that an ONU sends data on a wrong uplink wavelength channel to cause uplink data interference on the uplink wavelength channel, and further achieves the effect of rapidly locating the ONU using the wrong uplink wavelength for communication. 1. A method for processing abnormal uplink data , comprising:a first time wavelength division multiplexing, TWDM, channel terminal of a TWDM passive optical network, PON, detecting abnormal uplink data;the first TWDM channel terminal sending uplink data abnormality information to other TWDM channel terminals in the TWDM PON, wherein, the uplink data abnormality information is used for the other TWDM channel terminals detecting whether uplink data sent by optical network units, ONUs, managed by the other TWDM channel terminals themselves are abnormal, and when an abnormality is detected, processing an ONU sending abnormal uplink data.2. The method of claim 1 , wherein claim 1 , the uplink data abnormality information comprises at least one of:an ONU identification of the ONU sending the abnormal uplink data, an indication identification for indicating the abnormal uplink data, and an electrical signal corresponding to the abnormal uplink data.3. The method of claim 2 , wherein claim 2 , the first TWDM channel terminal sending the uplink ...

Method and apparatus for transmitting and receiving interface signals of distributed base station

The disclosures provide a method and apparatus for transmitting and receiving interface signals of a distributed base station. At least one channel of Common Public Radio Interface (CPRI) signals of a distributed base station are encapsulated into optical transport unit x (OTUx) signals in a frame structure of OTUx by adopting Generic Mapping Procedure (GMP) mapping scheme, wherein the x represents a transmission capacity and wherein the OTUx is adopted for providing a bandwidth required by the at least one channel of CPRI signals, and then the OTUx signals that bear the at least one channel of CPRI signals are sent.

METHOD AND APPARATUS FOR GENERATING OPTICAL POLAR RETURN-to-ZERO AMPLITUDE MODULATION SIGNAL USING REFLECTIVE SEMICONDUCTOR OPTICAL AMPLIFIER AND WAVELENGTH-DIVISION-MULTIPLEXED PASSIVE OPTICAL NETWORK SYSTEM USING THE SAME

The present invention can operate a reflective semiconductor optical amplifier at ultrahigh speed using a polar return-to-zero (RZ) modulation method, and operate a reflective semiconductor optical amplifier (RSOA) whose modulation bandwidth is limited at ultrahigh speed by generating signals vertically symmetrical using a newly suggested polar RZ signal generator when generating an amplitude modulation signal at a transmission end. The present invention can overcome the problem that a modulation speed cannot be increased to 10 Gb/s or above due to signal distortion by inter-symbol-interference when generating an ultrahigh speed amplitude modulation signal using an RSOA of low price having a very narrow modulation bandwidth in an RSOA-based optical network. Also, the present invention has an effect of receiving the generated amplitude modulation signal through a direct detection receiver which is cost-effective and simple, and further has an effect of enabling ultrahigh speed operation of the RSOA-based WDM PON. 1. A method for generating an optical polar return-to-zero (RZ) amplitude modulation signal , the method comprising:generating an electrical polar RZ amplitude modulation signal using a polar RZ amplitude modulation signal generator; andgenerating an optical polar RZ amplitude modulation signal by applying the electrical polar RZ amplitude modulation signal to a reflective semiconductor optical amplifier.2. The method of claim 1 , wherein the amplitude modulation signal is a multi-level signal.3. The method of claim 1 , wherein the step of generating an electrical polar RZ amplitude modulation signal comprises:generating a polar RZ signal using a polar RZ signal generator; andgenerating the electrical polar RZ amplitude modulation signal by converting the polar RZ signal into a multi-level amplitude modulation signal using a multi-level amplitude modulation signal generator.4. The method of claim 3 , wherein the step of generating a polar RZ signal using the ...

SYSTEM AND METHODS FOR COHERENT PON ARCHITECTURE AND BURST-MODE RECEPTION

An optical network communication system utilizes a passive optical network including an optical hub having an optical line terminal, downstream transmitter, an upstream receiver, a processor, and a multiplexer. The upstream receiver includes a plurality of TWDMA upstream subreceivers. The system includes a power splitter for dividing a coherent optical signal from the optical hub into a plurality of downstream wavelength signals, a long fiber to carry the coherent optical signal between the optical hub and the power splitter, and a plurality of serving groups. Each serving group includes a plurality of optical network units configured to (i) receive at least one downstream wavelength signal, and (ii) transmit at least one upstream wavelength signal. The system includes a plurality of short fibers to carry the downstream and upstream wavelength signals between the power splitter and the optical network units, respectively. Each upstream subreceiver receives a respective upstream wavelength signal. 1. A burst signal format data structure of a data stream transmitted over a network communication channel for a coherent burst mode receiver , comprising:a data header portion including at least one single-polarization signal data sequence and a training sequence; anda data payload portion including a demodulated data sequence,wherein the demodulated data sequence comprises payload data from the data stream that has been demodulated based on the data header portion.2. The data structure of claim 1 , wherein the demodulated data sequence is based on static information from the at least one single-polarization signal data sequence.3. The data structure of claim 2 , wherein the demodulated data sequence is further based on dynamic information of the network communication channel.4. The data structure of claim 3 , wherein the data stream comprises modulated data from the network communication channel claim 3 , and wherein the burst signal format data structure is configured to ...

Intelligent subsystem

An intelligent subsystem coupled with a system-on-chip (comprising a microprocessor/graphic processor), a radio transceiver, a voice processing module/voice processing algorithm, a foldable display, a near-field communication device, a biometric sensor and an intelligent learning algorithm is disclosed. The intelligent subsystem can respond to a user's interests and/or preferences. Furthermore, the intelligent subsystem is sensor-aware or context-aware. 1. An intelligent subsystem coupled by a wireless network ,wherein the intelligent subsystem comprises:(a) a microprocessor;(b) a foldable display; and 'wherein the radio transceiver comprises one or more first electronic components.', '(c) a radio transceiver,'}2. The intelligent subsystem according to claim 1 , further comprising a user-specific security control or a user-specific authentication control.3. The intelligent subsystem according to claim 1 , further comprising an internet firewall.4. The intelligent subsystem according to claim 1 , further comprising a biometric sensor or a near-field communication device.5. The intelligent subsystem according to claim 1 , further comprising a super-capacitor or a fuel-cell.6. The intelligent subsystem according to claim 1 , further comprising a first set of computer implementable instructions to understand a voice command or an audio signal in a natural language claim 1 , wherein the said first set of computer implementable instructions is stored in a first non-transitory storage media.7. The intelligent subsystem according to claim 1 , further comprising a second set of computer implementable instructions to provide learning or intelligence to the intelligent subsystem in response to a user's interest or a user's preference claim 1 , wherein the said second set of computer implementable instructions is stored in the first non-transitory storage media claim 1 , wherein the intelligent subsystem comprises the first non-transitory storage media.8. The intelligent ...

Intelligent subsystem

An intelligent subsystem coupled with a system-on-chip (comprising a microprocessor/graphic processor), a radio transceiver (e.g. a 5G/higher than 5G bandwidth radio transceiver), a voice processing module/voice processing algorithm, a foldable display component, a near-field communication device, a biometric sensor and an intelligent learning algorithm is disclosed. The intelligent subsystem can respond to a user's interests and/or preferences. Furthermore, the intelligent subsystem is sensor-aware or context-aware. 1. An intelligent subsystem coupled by a wireless network ,wherein the intelligent subsystem comprises:(a) a microprocessor;(b) a foldable display; and wherein the radio transceiver comprising (i) bandwidth of 5G or (ii) bandwidth greater than 5G,', 'wherein the radio transceiver comprises one or more first electronic components., '(c) a radio transceiver,'}2. The intelligent subsystem according to claim 1 , further comprising a user-specific security control or a user-specific authentication control.3. The intelligent subsystem according to claim 1 , further comprising an internet firewall.4. The intelligent subsystem according to claim 1 , further comprising a biometric sensor or a near-field communication device.5. The intelligent subsystem according to claim 1 , further comprising a super-capacitor or a fuel-cell.6. The intelligent subsystem according to claim 1 , further comprising a first set of computer implementable instructions to understand a voice command or an audio signal in a natural language claim 1 , wherein the said first set of computer implementable instructions is stored in a first non-transitory storage media.7. The intelligent subsystem according to claim 1 , further comprising a second set of computer implementable instructions to provide learning or intelligence to the intelligent subsystem in response to a user's interest or a user's preference claim 1 , wherein the said second set of computer implementable instructions is ...

Intelligent subsystem

An intelligent subsystem coupled with a system-on-chip (comprising a microprocessor/graphic processor), a radio transceiver, a voice processing module/voice processing algorithm, a stretchable/rollable display, a near-field communication device, a biometric sensor and an intelligent learning algorithm is disclosed. The intelligent subsystem can respond to a user's interests and/or preferences. Furthermore, the intelligent subsystem is sensor-aware or context-aware. 1. An intelligent subsystem coupled by a wireless network ,wherein the intelligent subsystem comprises:(a) a microprocessor;(b) a stretchable or rollable display; and 'wherein the radio transceiver comprises one or more first electronic components.', '(c) a radio transceiver,'}2. The intelligent subsystem according to claim 1 , further comprising a user-specific security control or a user-specific authentication control.3. The intelligent subsystem according to claim 1 , further comprising an internet firewall.4. The intelligent subsystem according to claim 1 , further comprising a biometric sensor or a near-field communication device.5. The intelligent subsystem according to claim 1 , further comprising a super-capacitor or a fuel-cell.6. The intelligent subsystem according to claim 1 , further comprising a first set of computer implementable instructions to understand a voice command or an audio signal in a natural language claim 1 , wherein the said first set of computer implementable instructions is stored in a first non-transitory storage media.7. The intelligent subsystem according to claim 1 , further comprising a second set of computer implementable instructions to provide learning or intelligence to the intelligent subsystem in response to a user's interest or a user's preference claim 1 , wherein the said second set of computer implementable instructions is stored in the first non-transitory storage media claim 1 , wherein the intelligent subsystem comprises the first non-transitory storage ...

System and method for performing in-service optical network certification

A system and method for performing an in-service optical time domain reflectometry test, an in-service insertion loss test, and an in-service optical frequency domain reflectometry test using a same wavelength as the network communications for point-to-point or point-to-multipoint optical fiber networks while maintaining continuity of network communications are disclosed.

SYSTEM AND METHODS FOR COHERENT OPTICAL EXTENSION

A coherent passive optical network extender apparatus includes an extender transceiver for communication with an associated optical headend. The extender transceiver includes at least one receiving portion, at least one transmitting portion, and an extension processor. The apparatus further includes a signal adaptation unit configured to convert a downstream electrical transmission lane into a plurality of individual wavelengths. Each of the converted individual wavelengths are for transmission to one of an optical node and an end user. The apparatus further includes a plurality of transceivers, disposed within the signal adaptation unit, and configured to process and transmit the converted individual wavelengths as a bundle for retransmission to the respective end users. 1. A coherent passive optical network extender apparatus , comprising:an extender transceiver for communication with an associated optical headend, the extender transceiver including at least one receiving portion, at least one transmitting portion, and an extension processor;a signal adaptation unit configured to convert a downstream electrical transmission lane into a plurality of individual wavelengths, each of the converted individual wavelengths being for transmission to one of an optical node and an end-user; anda plurality of transceivers, disposed within the signal adaptation unit, and configured to process and transmit the converted individual wavelengths as a bundle for retransmission to the respective end users.2. The apparatus of claim 2 , wherein the PON is one or more of a next generation PON network or a 100G-EPON network.3. The system of claim 1 , wherein the OLT implements one or more of dense/ultra-dense wavelength division multiplexing (DWDM) and time and wavelength division multiplexing (TWDM).4. The apparatus of claim 1 , wherein the extender processor includes one or more of an analog to digital converter (ADC) claim 1 , a digital signal processor (DSP) claim 1 , an ...

Dual-mode network

Aspects of the present disclosure are directed toward apparatuses, systems, and methods that include a first gateway circuit in an optical access network connecting a plurality of end-of-network users to a central node, the first gateway circuit connecting one of the plurality of end-of-network users to the central node via fiber optic data lines. Further, the first gateway circuit is configured and arranged to: relay a first set of data between the end-of-network user and the central node using a packet-switching communication protocol, and relay a second set of data between the end-of-network user and the central node using an optical flow switching communication protocol.