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.

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.

Verfahren zum Verhindern von Ladendiebstahl und elektronisches Diebstahl-Detektierungssystem

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

COMMUNICATION PROCEDURE IN PARTICULAR FOR A PORTABLE RADIO NET

WELLENL�NGENMULTIPLEXKANALSCHUTZ

PASSIVE OPTICAL TELECOMMUNICATION SYSTEM

FIBRE OPTICS OH DIRECTION CHANNEL WITH SEPARATE DIENSTKANÄLEN

OPTICAL TRANSMISSION OF NEWS SYSTEM IN THE PARTICIPANT EXCHANGE AREA.

WDM OPTICAL TRANSMISSION SYSTEM WITH PASSIVE HUB

Local access fiber optics communication system

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

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 laser coupled to the frequency combiner that transmits the up-converted upstream data signal and the upstream cable return; an RF diplexer coupled to the single upstream laser that separats the frequency up-converted data signal from the upstream cable return; and a frequency down-converter that down-converts the frequency up-converted upstream data signal back to baseband.

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 ...

HIGH-CAPACITY PACKET-SWITCHED RING NETWORK

A packet-switched WDMA ring network has an architecture utilizing packet stacking and unstacking for enabling nodes to access the entire link capacity by transmitting and receiving packets on available wavelengths. Packets are added and dropped from the ring by optical switches. A flexible credit-based MAC protocol along with an admission algorithm enhance the network throughput capacity.

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.

DYNAMIC ALLOCATION OF BANDWIDTH IN A BIDIRECTIONAL OPTICAL TRANSMISSION SYSTEM

A bidirectional optical communications system that is operable to dynamically allocate wavelengths for transmission in either direction in an optical fiber. The dynamic allocation is controlled by programmable optical devices. The programmable optical devices may be well known programmable devices such as wavelength selective switches and wavelength blockers or any other programmable optical device capable of dynamically allocating wavelengths between the two directions in the optical fiber. In addition, the programmable optical devices may be any combination of such wavelength selective switches, wavelength blockers or other programmable optical devices with other optical devices such as optical circulators, gain blocks, add/drop multiplexers, or fixed optical filters. Such a bidirectional optical communications system enables the dynamic allocation of bandwidth in an optical fiber without the need to replace components, such as fixed optical filters, and without disturbing communications ...

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).

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.

CONTINUOUSLY TUNEABLE LASER

A multi-line continuous wideband tunable laser (1) utilizes a symmetric or asymmetric grating (5) and a plurality of optical fibers (3), each of which forms a part of a respective laser cavity optical axis. By simultaneously altering both the periodicity of the intersections of the grating (5) with the plurality of optical axes established by the plurality of optical fibers (3) and the effective cavity length of each laser (1), a single-line spectral output is achieved at any desired point in the operating band.

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.

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

PROCESS OF CORRECTION Of an ASYMMETRY OF TIME.

Les modes de réalisation de la présente invention décrivent un procédé de correction d'une asymétrie de délai des messages de synchronisation transmis dans un réseau à commutation de paquets entre une horloge maître et une horloge esclave dans lequel l'asymétrie de délai du parcours reliant l'horloge maître à l'horloge esclave est déterminée et corrigée localement au niveau d'au moins un lien dudit parcours par des moyens de mesure et de correction d'un décalage du temps situés au niveau des nœuds du parcours.

WAVELENGTH DIVSION MULTIPLEXING PASSIVE OPTICAL NETWORK

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

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 ...

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 ...

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).

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 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.

MULTIPORT OPTICAL AMPLIFIER WITH NARROWCAST POWER EQUALIZATION

Apparatus and method for equalizing a multiplicity of amplifier optical output signals comprised of a combined broadcast optical signal and a narrowcast optical signal having different bands of wavelengths of light by adjusting the power output level of at least one the signals in response to an amplified sample of the signal. A light switch or attenuator and a sensor for determining whether a transmission fiber is in place is connected to each of the multiplicity of optical output signals to allow the optical output signals to be turned on and off for maintenance and repair.

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.

MULTIPLE ACCESS SYSTEM FOR COMMUNICATIONS NETWORK

A communications network (e.g. fibre to the home (FTTH) or wireless) comprises a head end, to which outstations are coupled via a shared point-to-multipoint medium. The head end is arranged to transmit downstream to the outstations a sequence of frames comprising data frames and command frames. The command frames marshal control of upstream transmissions from the outstations. A first downstream command frame directed to a specific outstation indicates the beginning of a timeslot, and also indicates the time slot duration (including an indefinite duration). Where the duration is indefinite, a second command frame directed to at least the same outstation indicates the end of the allotted time slot. Further methods are provided to optimise timeslot allocation, and to support addition and removal of outstations on the network.

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.

SIMULTANEOUS TRANSMISSION OF LED AND LASER SIGNALS OVER SINGLE MODE FIBER

At the transmitting end of an optical transmission system, a wide linewidth LED (31) is intensity modulated by a first digital information signal and a narrow linewidth DFB (Distributed Feedback) laser (32) is frequency modulated by a second digital information signal and the two modulated optical signals are combined (33) for transmission over a single mode optical fiber (34). At the receiving end, the intensity modulating digital signal is recovered from the received optical signal by a photodetector (52). The frequency modulating digital signal is recovered by a coherent receiver (53) which includes a local oscillator (55) the output of which is optically combined (54) with the received optical signal. A photodetector (56) converts this combined optical signal to an electrical IF signal, and an IF demodulator (57) reconstructs the second digital signal therefrom.

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.

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 ...

Audio and/or video system for a motor vehicle

The invention relates to an audio and/or video system for a motor vehicle, which comprises an annular, bi-directional, optical network ( 1 ) from optical waveguides and audio and/or video devices ( 2 - 12 ) that are interlinked by means of the network ( 1 ) in an annular manner. Data are transmitted between the audio and/or video devices ( 2 - 12 ) in the network ( 1 ) in a first data channel having a first optical wavelength. The network used is especially a MOST bus known for use in motor vehicles. The invention is characterized in that data are transmitted between the audio and/or video devices ( 2 - 12 ) in the network ( 1 ) in a second data channel having a second optical wavelength. Particularly, IP data can be transmitted at a high transmission rate via the second data channel.

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.

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.

Interleaved bidirectional WDM channel plan

A bidirectional optical link has a plurality of wavelengths to carry information in first and second differing transmission directions to optimize system performance. First and second sets of wavelengths of the plurality of wavelengths are determined wherein the wavelengths of the first set alternate with the wavelengths of the second set. Transmitting is performed in the first transmission direction by way of the first set of wavelengths and in the second transmission direction by way of the second set of wavelengths whereby the transmission directions of adjacent wavelengths of the plurality of wavelengths differ. The wavelengths of the plurality of wavelengths are wavelength division multiplexed within the optical link and the wavelengths transmitted in the same direction are multiplexed with each other. The wavelengths of the plurality of wavelengths can be substantially evenly spaced apart from each other or adjacent wavelengths transmitted in different directions may overlap. The ...

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.

Passive Optical Network System

A system for providing bi-directional RF services over a point-to-multipoint Passive Optical Network (PON). A system that can transport upstream RF signals generated by devices such as a set top box or a cable modem, through a passive Optical Network while simultaneously supporting downstream RF video and bi-directional base-band services on the PON.

AMORTIZATION OF EXPENSIVE OPTICAL COMPONENTS

A laser system includes an array of lasers that emit light at a number of different, fixed wavelengths. A group of optical transport systems connect to the laser system. Each of the optical transport systems is configured to modulate data signals onto the light from the laser system to create optical signals and transmit the optical signals on one or more optical fibers. 134-. (canceled)35. A system comprising: a laser bank that includes lasers,', 'a first multiplexer connected to the laser bank, and', 'an amplifier connected to the first multiplexer; and, 'a laser system comprising a demultiplexer,', 'a plurality of transmitters connected to the demultiplexer, and', 'a second multiplexer connected to the plurality of transmitters., 'an optical transport system, connected to the laser system, comprising36. The system of claim 35 , where the optical transport system further comprises a combiner claim 35 ,where the combiner is connected to the amplifier, andwhere the demultiplexer is connected to the combiner.37. The system of claim 35 , where the optical transport system further comprises:a second demultiplexer,a second plurality of transmitters connected to the second demultiplexer, anda third multiplexer connected to the second plurality of transmitters.38. The system of claim 37 , where the optical transport system further comprises a combiner claim 37 ,where the combiner is connected to the amplifier, andwhere the second demultiplexer is connected to the combiner.39. The system of claim 35 , where the lasers include an array of fixed lasers.40. The system of claim 35 , where a temperature of a first laser claim 35 , of the lasers claim 35 , is substantially equal to a temperature of a second laser of the lasers.41. A system comprising: a laser bank that includes lasers,', 'a first multiplexer connected to the laser bank,', 'an amplifier connected to the first multiplexer, and', 'a splitter connected to the amplifier; and, 'a laser system comprising a ...

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.

Optical transmission network with tree structure

The network has an emulator device with a continuous emission laser diode (LDa) coupled to access links (F1-F3) through a start coupler (Ca) and optical gates (G1-G3). The device emits auxiliary waves having a wavelength and couples the waves in the access links along downward propagation directions. A control device (2a) controls the optical gates for controlling selective emissions of auxiliary waves.

OPTICAL FIBER -BASED DISTRIBUTED COMMUNICATIONS SYSTEM AND METHOD EMPLOYING WAVELENGTH DIVISION MULTIPLEXING (WDM) FOR ENHANCED UPGRADABILITY

DATA TRANSMISSION ON A NETWORK

WAVELENGTH-DIVISION-MULTIPLEXED PASSIVE OPTICAL SUBSCRIBER NETWORK USING MULTI-WAVELENGTH LASING SOURCE AND REFLECTIVE OPTICAL AMPLIFICATION MEANS

PROBLEM TO BE SOLVED: To provide a wavelength-division-multiplexed passive optical subscriber network using a multi-wavelength lasing source and a reflective optical amplification means. SOLUTION: The wavelength-division-multiplexed passive optical subscriber network using the multi-wavelength lasing source and the reflective optical amplification means includes: a central office in which a multi-wavelength lasing source is located; a plurality of subscriber terminals for transmitting an upward signal by a reflection signal of a multi-wavelength signal transmitted from the central office; and a local office, which is connected among the central office and the subscriber terminals through transmission optical fibers, for demultiplexing the multi-wavelength signal transmitted from the central office and transmitting the demultiplexed signal to the subscriber terminals, and for multiplexing upward signals received from each of the subscriber terminals and transmitting the multiplexed signals ...

COMMUNICATION SYSTEM

PROBLEM TO BE SOLVED: To efficiently perform WDM(wave length division multi plexing) communication by variably setting a monitoring control channel. SOLUTION: Monitoring control channel-setting means 11-1 to 11-n variably set a monitoring control channel to monitoring control channel for performing the monitoring control of light communication consisting of a first light- monitoring channel with a band other than the transmission band of a light main signals as a transmission band, and a second light monitoring channel with the vacant band of the transmission band of the light main signal as a transmission band. WDM transmission means 12-1 to 12-n perform the transmission control of the wavelength multiple/separation of the monitoring control channel and the light main signal. A setting information reporting means 21 reports setting information for setting a monitoring setting channel to WDM devices 10-1 to 10-n. A means 22 for controlling application state controls a network application ...

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

Изобретение относится к технике оптической связи. Технический результат состоит в непрерывном предоставлении службы в существующей системе оптической связи и снижении затрат при предоставлении службы на другой скорости передачи. Для этого оконечное устройство оптической сети стороны станции сконфигурировано так, что к одному светоизлучающему блоку присоединены первый блок обработки, который выполняет процесс, чтобы выводить оптический сигнал светоизлучающим блоком на одной скорости передачи, и второй блок обработки, который выполняет процесс, чтобы выводить оптический сигнал светоизлучающим блоком на второй скорости передачи. 4 н. и 15 з.п. ф-лы, 7 ил.

ОПТИЧЕСКАЯ ВОЛОКОННАЯ ЛИНИЯ СВЯЗИ

Изобретение относится к оптической стекловолоконной передающей линии, которая включает устройство 5 для ввода и вывода оптических служебных сигналов из оптического стекловолокна 2 линии, где указанные средства включают в излучающий блок 1, приемный блок 3, пригодных для приема из оптической линии 2 и/или испускаемых в линию самими служебными сигналами, имеющими длину волны, которая существенно отличается от длины волны сигналов дистанционной связи, каждый из блоков 11 соединен с соответствующим оптическим соединительным элементом 6, включенным в световод 2, годным для соединения с оптическим волокном линии и/или для извлечения из нее оптических служебных сигналов. 7 з.п. ф-лы, 5 ил.

Optische Netzwerke

System and methods for distribution of heterogeneous wavelength multiplexed signals over optical access network

System and methods for distribution of heterogeneous wavelength multiplexed signals over optical access network

Wavelength division multiplex wdm optical network

RANGE FINDING PROCEDURE AND TRANSMISSION SLAVE STATION FOR THE EXECUTION OF THE PROCEDURE

OPTICAL COMMUNICATION SYSTEM AND - PROCEDURES FOR THE TRANSMISSION OF POINT OF POINT AND DISTRIBUTION SIGNALS

CHANNEL GROOMING IN OPTICAL COMMUNICATION SYSTEMS WITH WAVELENGTHMULTIPLEX

ARRANGEMENT AND PROCEDURE CONCERNING THE SERVICE SUPPLY IN A TELECOMMUNICATION SYSTEM

DEVICE FOR OPTICAL ZEITDEMULTIPLEXEN

DWDM COMMUNICATIONS NETWORK WITH PERIODIC WAVELENGTH MULTIPLEXIERUNG

OPTICAL TRANSMISSION BETWEEN CENTERS A TERMINAL AND SEVERAL CLIENT TERMINALS OVER AN OPTICAL NETWORK

COMMUNICATION SYSTEM.

OPTICAL TRANSMISSION OF NEWS SYSTEM FOR THE PARTICIPANT EXCHANGE AREA WITH OPTICAL AMPLIFIERS

OPTICAL WAVELENGTH MULTIPLEX NETWORK

NETWORK FINAL HE/CRECEIVER FOR THE EXTENSION OF THE RANGE OF A ON FIBER OPTICS BASING NETWORK INFRASTRUCTURE

A wavelenght-division-multiplexing passive optical network utilizing fiber fault detectors and/or wavelenght tracking components

A LIGHT SOURCE CABLE OF LASING THAT IS WAVELENGTH LOCKED BY AN INJECTED LIGHT SIGNAL

Optically interconnecting multiple processors

OPTICAL COMMUNICATION MANAGEMENT SYSTEMS

System for combining multiple low power lasers

An optical PON network using passive DPSK demodulation

OPTICAL FIBER-BASED DISTRIBUTED COMMUNICATIONS SYSTEM AND METHOD EMPLOYING WAVELENGTH DIVISION MULTIPLEXING (WDM) FOR ENHANCED UPGRADABILITY

OPTICAL FIBER-BASED DISTRIBUTED COMMUNICATIONS COMPONENTS, SYSTEMS, AND METHODS EMPLOYING WAVELENGTH DIVISION MULTIPLEXING (WDM) FOR ENHANCED UPGRADABILITY Optical fiber-based distributed communications components and systems, and related methods employing wavelength division multiplexing (WDM) for enhanced upgradability are 10 disclosed. In one embodiment, the system comprises a plurality of downlink optical transmitters configured to receive downlink electrical radio frequency (RF) signals from a plurality of RF sources and convert the downlink electrical RF signals into downlink optical RF signals. The system also comprises a wavelength division multiplexer configured to multiplex downlink optical RF signals into a plurality of downlink wavelengths over a 15 common downlink optical fiber connected to a plurality of remote antenna units (RAUs). In this manner, additional downlink optical fibers are not required to support providing additional RAUs in the system. The systems and methods ...

GROOMING OF CHANNELS IN WAVELENGTH DIVISION MULTIPLEXED OPTICAL COMMUNICATION SYSTEMS

The invention is concerned with a method of grooming channels in a wavelength division multiplexed (WDM) communication system (10), the system (10) comprising a plurality of system nodes (20) interconnected together by a ring formation of optical fibre waveguides (30) for guiding communication traffic bearing radiation between the nodes (20). The radiation comprises a plurality of wavelength channels for conveying communication traffic said channels being spaced over a channel wavelength spectrum. The method is characterised by selecting the wavelength channels being used within the system to convey communication traffic (active channels) such as to consolidate them into a relatively more compact part or parts of the wavelength spectrum such as to occupy less communication bandwidth.

INCREASED CAPACITY BIDIRECTIONAL DWDM NETWORK ARCHITECTURE WITH FREQUENCY STACKING SYSTEM

A bidirectional dense wave division multiplexing (DWDM) cable television network architecture with frequency stacking system provides increased capacity in the reverse path. The combination of optical multiplexing, using dense wave division multiplexing, and RF multiplexing, using frequency stacking, significantly increases the efficiency of the return path in a bidirectional architecture. The ITU grid transmitters and the frequency stacking system may be located at the nodes, at the primary or secondary headends, or with the frequency stacking system at the node and the ITU grid transmitters at the primary/secondary headend.

OPTICAL WAVELENGTH MULTIPLEXING ACCESS SYSTEM

... ² According to the present invention, a star-type ²wavelength multiplexed communication network using optical ²TX/RX devices capable of assigning the wavelengths can be ²provided without using the monitoring light . In an embodiment ²of the present invention, an optical TX/RX device for ²transmitting and receiving a wavelength-multiplexed signal ²light comprises an optical receiver capable of varying the RX ²wavelength and an optical transmitter capable of varying the ²TX wavelength. The optical TX/RX device detects RX wavelengths ²not in use via the optical receiver, and assigns the RX ²wavelength of the optical receiver to one of the RX wavelengths ²not-in-use, and assigns the TX wavelength of the optical ²transmitter to a TX wavelength corresponding to the RX ²wavelength according to a correspondence table of TX and RX ²wavelengths in the memory. Then, the optical TX/RX device ²transmits a signal light on this TX wavelength, and detects the ²response on the RX wavelength. If the response ...

SYSTEM AND METHOD FOR OPTICAL TRANSMISSION

A system and method for bidirectional optical transmission in one optical fiber with large transmission capacity, enabling the enlargement of transmission distance. Downward optical signals sent from one or more downward optical signal transmitters are received by one or more downward optical signal receivers via an optical fiber transmission line and upward/ downward signal separating multiplexer - demultiplexers. On the other hand, upward optical signals sent from one or more upward optical signal transmitters are received by one or more upward optical signal receivers by following the opposite route. Output signals from the downward optical signal transmitter leak in the upward optical signal receiver via the upward/ downward signal separating multiplexer -demultiplexer. However, there is a large difference between the frequency of the upward optical signals and that of the downward optical signals, and beat/ noise components produced by interference in the two wavelengths are present outside the band of the upward optical signal receiver, thus avoiding the influence of coherent crosstalk. Additionally, power crosstalk also does not become a problem because of large isolation.

ADD/DROP NODE FOR AN OPTICAL COMMUNICATIONS NETWORK

A 1550nm DWDM optical communications network has a 1300nm remote node added to which a small number of channels can be added or dropped. The additional node includes dual wavelength couplers to enable 1300nm wavelength signals to be added or dropped. The 1300nm signals are demultiplexed using a WDM filter and connected into the transponders of the 1550nm nodes for transportation around the node. Signals for the remote network are converted to 1300nm signals at the 1550nm node transponders and multiplexed onto the network to be dropped to the network node transponder.

SYSTEMS, APPARATUS, METHODS AND COMPUTER PROGRAM PRODUCTS FOR DOWNLOADING AND MAINTAINING IP STREAM WHITELISTS ON OPTICAL NETWORK TERMINALS

Systems, apparatus, methods and computer program products are provided for downloading a whitelist onto a passive optical network including a passive optical network and a management interface communicatively coupled to the passive optical network and configured to provision the whitelist. An optical line terminal also on the passive optical network includes a passive optical network card operable to broadcast the whitelist to optical network terminals which are configured to receive and enforce the whitelist.

SYSTEM AND METHOD FOR OVERLAYING A POINT TO MULTIPOINT ONTO A POINT TO POINT FOR SYSTEM UPGRADE

DATA TRANSFER IN AN OPTICAL NETWORK COMMUNICATION SYSTEM

AbstractCommunications apparatus, including client interface units (CIUs)(20)coupled to network service lines (12)for sending and receiving data carried by theservice lines in accordance with respective communication protocols. The CIUsinclude at least first and second CIUs that communicate with respective first and 5second channels of the data operating in accordance with different, respective firstand second protocols. The apparatus includes optical interface units (OIUs)(24),coupled to a passive optical network (PON)(16)and modulating optical radiationresponsive to the data so as to convey the data over the PON.The apparatus further includes a connectivity unit (22)which conveys the data 10between the CIUs and the OIUs, while mapping the channels to the OIUs so that datafrom the first and second channels is carried in alternation by one of the OIUs to firstand second users of the PON communicating respectively according to the first andsecond protocols.

SYSTEM AND METHOD PROVIDING A SEPARATE CONTROL CHANNEL FOR A WAVELENGTH DIVISION MULTIPLEXED NETWORK

A network (FIGURE 1) including a control channel source node (12(1)-12(N)) and a plurality of control channel destination nodes (12(1)-12(N)) is interconnected by communications media in the form of a ring. The control and control channel destination nodes transfer information over a plurality of channels using wavelength-division multiplex techniques. The control channel source node transmits control information to all of the control channel destination nodes over a unitary control channel, and each of the control channel destination nodes drains off a portion of the energy of the signal comprising the control channel to facilitate decoding and processing of the control information contained therein (FIGURE 2). Each of the aspects, the control channel destination nodes can also generate status information for transfer to the control channel source node over the control channel. The control channel source node drains off the energy of the signal comprising the control channel to facilitate ...

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.

PASSIVE OPTICAL TELECOMMUNICATION SYSTEM

ABSTRACT OF THE DISCLOSURE In a passive optical telecommunication system having a central station communicating via respective optical waveguides with a number of decentralized stations, an electrical carrier signal is DPSK-modulated in the upstream transmission, after which the electrical signal modulated in this way effects the intensity modulation of the emitted light; in the downstream signal transmission, the emitted light is intensity-modulated by a preferably scrambled NRZ baseband signal. The carrier signal is derived by frequency multiplication from the regenerated reception clock signal of the decentralized station.

DYNAMICALLY RESPONSIVE CATV SYSTEM WITH SHARED FIBER OPTIC LINK

A CATV system uses a single single-mode optical fiber for transmitting a composite optical signal containing television signals in different frequency channels for a plurality of subscriber terminals from a headend terminal to a distribution terminal, and converts the transmitted signals at the distribution terminal into electrical signals for distribution to a plurality of subscriber t erminals over a plurality of coaxial cables. The distribution terminal further receives electrical service request signals from each of the plurality of subscriber term inals, and convert each received service request signal into an optical service request signal for transmission to the headend terminal over the same single-mode optica l fiber as used from transmitting the composite optical signal. Wavelength-divisio n multiplexer/demultiplexers couple the optical fiber to the headend terminal and the distribution terminal to enable bidirectional transmission. The subscriber termi nal is responsive to a ...

Method for correcting a delay asymmetry

Exemplary methods and apparatuses are provided for a method for correcting for a delay asymmetry of synchronization messages transmitted within a packet-switched network between a master clock and a slave clock, in which the delay asymmetry of the path connecting the master clock to the slave clock is determined and corrected locally within at least one link of said path. One or more signals are transmitted on one or more wavelengths over at least one optical fiber. The one or more signals are received and detected on the one or more wavelengths over the at least one optical fiber. The technique determines an arrival time difference between the received and detected one or more signals, and calculates a delay asymmetry of an adjacent link based on the time difference.

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.

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 , ...

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.

Subcarrier Based Data Center Network Architecture

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for generating, transmitting, directing, receiving, and processing optical subcarriers. In some implementations, a system includes a Tier 1 switch that supplies a plurality of data channels; a transmitter that receives the plurality of data channels, the transmitter including an optical modulator that supplies a plurality of optical subcarriers based on the plurality of data channels; an optical platform that receives the plurality of optical subcarriers, the optical platform having a plurality of outputs, each of which supplying at least one of the plurality of subcarriers; a plurality of receivers, each receiving one or more of the plurality of optical subcarriers and supplying one or more of the plurality of data channels; and a plurality of servers, each of which receiving one or more of the plurality of data channels. 1. A system , comprising:{'b': '1', 'a Tier switch that supplies a plurality of data channels;'} a laser, and', 'an optical modulator that receives a plurality of radio frequency (RF) signals associated with the plurality of data channels, such that the optical modulator supplies a plurality of optical subcarriers based on the plurality of data channels;, 'a transmitter that receives the plurality of data channels, the transmitter includingan optical platform, including one of an optical demultiplexer or a splitter, that receives the plurality of optical subcarriers, the optical platform having a plurality of outputs, each of which supplying at least one of the plurality of subcarriers;a plurality of receivers, each of which being coupled to a respective one of the plurality of outputs of the optical platform, each of the plurality of receivers receiving one or more of the plurality of optical subcarriers and supplying one or more of the plurality of data channels based on the received one or more of the plurality subcarriers; anda plurality of servers, ...

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 ...

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.

TRANSMISSION DEVICE, TRANSMISSION METHOD, RECEPTION DEVICE, AND RECEPTION METHOD

A transmission device includes a symbol generator that generates a modulation symbol by mapping transmission data to a signal point arranged in a two-dimensional or three-dimensional color space; and an outputter that outputs an optical signal modulated according to the modulation symbol. 1. A transmission device , comprising:a symbol generator that generates a modulation symbol by mapping transmission data to a signal point arranged in a two-dimensional or three-dimensional color space; andan outputter that outputs an optical signal modulated according to the modulation symbol.2. A transmission method implemented in a transmission device , the transmission method comprising:generating a modulation symbol by mapping transmission data to a signal point arranged in a two-dimensional or three-dimensional color space; andoutputting, from an outputter included in the transmission device, an optical signal modulated according to the modulation symbol.3. A reception device , comprising:a light receiver generates a reception signal by receiving an optical signal via a plurality of light receiving elements; anda demodulator that generates reception data by demapping and decoding the reception signal, symbol-by-symbol, as a signal in a two-dimensional or three-dimensional color space.4. A reception method implemented in a reception device , the reception method comprising:generating a reception signal by receiving an optical signal via a plurality of light receiving elements; andgenerating reception data by demapping and decoding the reception signal, symbol-by-symbol, as a signal in a two-dimensional or three-dimensional color space. This application is a U.S. continuation application of PCT International Patent Application Number PCT/JP2018/016231 filed on Apr. 20, 2018, claiming the benefit of priority of U.S. Provisional Patent Application No. 62/491,306 filed on Apr. 28, 2017, U.S. Provisional Patent Application No. 62/518,074 filed on Jun. 12, 2017, and U.S. Provisional ...

Transmission control device, transmission system, and transmission method

A transmission control device includes a subcarrier selector configured to select one or more subcarriers for transmitting an error correction code for correcting data, from a plurality of subcarriers having different transmission capacities, each of the plurality of subcarriers used for transmitting either of the data and the error correction code, in accordance with an amount of data of the error correction code and transmission capacities respectively assigned to the plurality of subcarriers.

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 ...

SPAN-WISE SPECTRUM MANAGEMENT SYSTEM AND METHOD

Methods and systems are provided for optical signal transmission using span-wise spectrum management. The method includes transmitting a first optical signal at a first wavelength by a control system. The first optical signal has a first optical path distance. The method further includes determining a first guard band requirement for the first optical signal, and transmitting a second optical signal by the control system. The second optical signal has a second optical path distance. The method includes determining a second guard band requirement for the second optical signal, and placing the second optical signal spectrally adjacent to the first optical signal by selecting a second wavelength. The second wavelength is selected to satisfy the first and second guard band requirements. 1. A method for optical signal transmission comprising:transmitting a first optical signal at a first wavelength by a control system, the first optical signal having a first optical path distance;determining a first guard band requirement for the first optical signal;transmitting a second optical signal by the control system, the second optical signal having a second optical path distance;determining a second guard band requirement for the second optical signal; andplacing the second optical signal spectrally adjacent to the first optical signal by selecting a second wavelength, the second wavelength selected to satisfy the first and second guard band requirements.2. The method of claim 1 , wherein the first guard band requirement is satisfied by allocating a plurality of first guard bands in a plurality of optical spans.3. The method of claim 2 , wherein the plurality of first guard bands include a particular guard band with a different length than another guard band.4. The method of claim 2 , wherein the plurality of first guard bands include a particular guard band with a different width than another guard band.5. The method of claim 2 , wherein the plurality of first guard bands ...

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 , ...

DETERMINATION DEVICE AND DETERMINATION METHOD

A determination device for a wavelength division multiplex communication system, configured to set each of different paths each of which is formed by connection of spans each of which is a zone between two adjacent transmission devices, among transmission devices forming a communication network, in the communication network, or a single span in the communication network, for the corresponding one of different wavelengths, and configured to transmit an optical signal of each of the wavelengths via the corresponding path set to the wavelength, the device includes: a determination section configured to determine whether an optical signal of at least one of the wavelengths is transmittable only to a path, among newly formed paths, for which the number of spans forming the path is equal to or less than a predetermined upper-limit number, in order to transmit one or more optical signals of one or more wavelengths among the wavelengths. 1. A determination device for a wavelength division multiplex communication system , configured to set each of different paths each of which is formed by connection of spans each of which is a zone between two adjacent transmission devices , among transmission devices forming a communication network , in the communication network , or a single span in the communication network , for the corresponding one of different wavelengths , and configured to transmit an optical signal of each of the wavelengths via the corresponding path set to the wavelength , the device comprising:a determination section configured to determine whether an optical signal of at least one of the wavelengths is transmittable only to a path, among newly formed paths, for which the number of spans forming the path is equal to or less than a predetermined upper-limit number, in order to transmit one or more optical signals of one or more wavelengths among the wavelengths.2. The determination device according to claim 1 ,wherein the determination section is configured to ...

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 ...

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 ...

DISTRIBUTION MATCHING FOR PROBABILISTIC CONSTELLATION SHAPING WITH AN ARBITRARY INPUT/OUTPUT ALPHABET

Consistent with the present disclosure, an encoder circuit is provided at a transmit side of an optical fiber link that maps an input sequence of bits of fixed length k a sequence of symbols of a codeword of length n, such that the symbols of the codeword define a predetermined transmission probability distribution. Preferably, each symbol of the codeword is generated during a corresponding clock cycle, such that after n clock cycles, a complete codeword corresponding to the input bit sequence is output. On a receive end of the link, a decoder is provided that outputs the k-bit sequence every n clock cycles. Accordingly, buffers need not be provided at the output of the encoder and the input of the decoder, such that processing of the input sequence, codewords, and output sequence may be achieved efficiently without large buffers and complicated circuitry. Moreover, the input sequence, with any binary alphabet may be matched to a desired output distribution with any arbitrary alphabet. Accordingly, probabilistic constellation shaping may be achieved over constellations of arbitrary size. In addition, relatively long codewords, may be encoded and decoded with the apparatus and method disclosed herein. Accordingly, for a fixed SNR a higher SE (more bits per symbol) can be achieved. Alternatively, for a fixed SE, a lower SNR may be sufficient. Moreover, the resulting SE may be finely tailored to a particular optical link SNR to provide data transmission rates that are higher than the low order modulation formats that would otherwise be employed for optical signals carried by such links. 1. An apparatus , comprising:a local oscillator laser that supplies local oscillator light;an optical hybrid circuit that receives an incoming optical signal and the local oscillator light, the incoming optical signal being modulated in accordance with an m-quadrature modulated optical signal, where m is greater than or equal to 16;a photodetector circuit that receives an optical output ...

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.

DISTRIBUTION MATCHING FOR PROBABILISTIC CONSTELLATION SHAPING WITH AN ARBITRARY INPUT/OUTPUT ALPHABET

Consistent with the present disclosure, an encoder circuit is provided at a transmit side of an optical fiber link that maps an input sequence of bits of fixed length k a sequence of symbols of a codeword of length n, such that the symbols of the codeword define a predetermined transmission probability distribution. Preferably, each symbol of the codeword is generated during a corresponding clock cycle, such that after n clock cycles, a complete codeword corresponding to the input bit sequence is output. On a receive end of the link, a decoder is provided that outputs the k-bit sequence every n clock cycles. Accordingly, buffers need not be provided at the output of the encoder and the input of the decoder, such that processing of the input sequence, codewords, and output sequence may be achieved efficiently without large buffers and complicated circuitry. Moreover, the input sequence, with any binary alphabet may be matched to a desired output distribution with any arbitrary alphabet. Accordingly, probabilistic constellation shaping may be achieved over constellations of arbitrary size. In addition, relatively long codewords, may be encoded and decoded with the apparatus and method disclosed herein. Accordingly, for a fixed SNR a higher SE (more bits per symbol) can be achieved. Alternatively, for a fixed SE, a lower SNR may be sufficient. Moreover, the resulting SE may be finely tailored to a particular optical link SNR to provide data transmission rates that are higher than the low order modulation formats that would otherwise be employed for optical signals carried by such links. 133-. (canceled)34. A transmitter , comprising:a laser; anda modulator, the receives light output from the laser and a drive signal, such that, based on the drive signal, the modulator supplies a modulated optical signal that includes a plurality of subcarriers,wherein each of the plurality of subcarriers is a Nyquist subcarrier, andeach of the plurality of subcarriers carries a ...

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.

PASSIVE OPTICAL NETWORK COMMUNICATIONS METHOD AND APPARATUS, AND SYSTEM

Embodiments of the present disclosure provide a passive optical network communications method and apparatus, and a system. The method includes: determining a wavelength channel group of an optical network unit (ONU) and a wavelength channel in the wavelength channel group; and sending a first message to the ONU, where the first message carries identification information of the wavelength channel group and identification information of the wavelength channel in the wavelength channel group. In the embodiments of the present disclosure, such a logical channel group as a wavelength channel group is established, and when a channel in a channel group is faulty, a scheduling module of an OLT can rapidly and easily reallocate a service to another member in the channel group, so that channel interaction is avoided. Therefore, bandwidth scheduling efficiency and bandwidth utilization of a PON system are higher. 1. A passive optical network (PON) communication method , comprising:determining a wavelength channel group of an optical network unit (ONU) and a wavelength channel in the wavelength channel group; andsending a first message to the ONU for instructing the ONU to establish the wavelength channel group, wherein the first message carries identification information of the wavelength channel group and identification information of the wavelength channel in the wavelength channel group.2. The method according to claim 1 , wherein before determining a wavelength channel group of an optical network unit (ONU) and a wavelength channel in the wavelength channel group claim 1 , the method further comprises:sending a second message to the ONU for requesting the ONU to report an identifier of the wavelength channel.3. The method according to claim 1 , further comprising:receiving a third message from the ONU, wherein the third message carries the identifier of the wavelength channel reported by the ONU.4. The method according to claim 1 , further comprising:locally establishing, ...

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 of monitoring an optical fiber with at least one optical transceiver having an optical time domain reflectometry (OTDR) and/or optical frequency domain reflectometry (OFDR) function that is disposed to couple to the optical fiber , the method comprising:connecting an optical transceiver to a network terminal, the optical transceiver having OTDR and/or OFDR function and the network terminal is configured to read information from the optical transceiver;coupling the optical fiber to the optical transceiver;performing data communications on a same wavelength with the optical transceiver;performing OTDR and/or OFDR function on the same wavelength with the optical transceiver responsive to a disruption in the data communications;gathering measurements from the OTDR and/or OFDR function to determine at least one fault on the optical fiber;storing the measurements in the optical transceiver;reading the stored measurements from the optical transceiver to the network terminal, andreporting by the network terminal of the at least one fault on the optical fiber.2. The method of claim 1 , further comprising of:visualizing the report of the at least one fault on the optical fiber by an application.3. The method of claim 1 , wherein in lieu of performing OTDR and/or OFDR function on the same wavelength with the optical transceiver responsive to a disruption in the data communications claim 1 , the optical transceiver performs OTDR and/or OFDR function on the same wavelength with the optical transceiver responsive to a request received through the network terminal.4. The method of claim 3 , wherein ...

SYSTEMS AND METHODS FOR MULTIBAND DELTA SIGMA DIGITIZATION

A digital mobile fronthaul (MFH) network includes a baseband processing unit (BBU) having a digitization interface configured to digitize, using delta-sigma digitization, at least one wireless service for at least one radio access technology. The network further includes a transport medium in operable communication with the BBU. The transport medium is configured to transmit a delta-sigma digitized wireless service from the BBU. The network further includes a remote radio head (RRH) configured to operably receive the delta-sigma digitized wireless service from the BBU over the transport medium. 1. A digital mobile fronthaul (MFH) network , comprising:a baseband processing unit (BBU) including a digitization interface configured to digitize, using delta-sigma digitization, at least one wireless service for at least one radio access technology;a transport medium (i) in operable communication with the BBU, and (ii) configured to transmit a delta-sigma digitized wireless service from the BBU; anda remote radio head (RRH) configured to operably receive the delta-sigma digitized wireless service from the BBU over the transport medium.2. The network of claim 1 , wherein the digitization interface comprises a multiband delta-sigma analog-to-digital converter (ADC).3. The network of claim 2 , wherein the digitization interface further comprises a baseband processor claim 2 , a radio frequency (RF) up-converter claim 2 , and a frequency domain multiplexer (FDM).4. The network of claim 3 , wherein the transport medium comprises an optical fiber.5. The network of claim 4 , wherein the digitization interface further comprises an electrical-to-optical interface at the optical fiber claim 4 , and wherein the multiband delta-sigma ADC is disposed between the electrical-to-optical interface and the FDM.6. The network of claim 5 , wherein the digitization interface further comprises a wavelength division multiplexing multiplexer disposed between the electrical-to-optical interface ...

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. 1. An optical network communication system , comprising:an optical hub including an intelligent configuration unit configured to monitor and multiplex at least two different optical signals into a single multiplexed heterogeneous signal;an optical distribution center configured to individually separate the at least two different optical signals from the multiplexed heterogeneous signal;at least one fiber segment connecting the optical hub and the optical distribution center, the at least one fiber segment configured to receive the multiplexed heterogeneous signal from the optical hub and distribute the multiplexed heterogeneous signal to the optical distribution center; andat least two end users, each including a downstream receiver configured to receive one of the respective separated optical signals from the optical distribution center.2. The system of claim 1 , wherein the intelligent configuration unit comprises a processor and a memory claim 1 , and an optical multiplexer.3. The system of claim 2 , wherein the intelligent configuration unit further ...

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 Ethernet Passive Optical Network (EPON) based 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 MultiPoint Control Protocol (MPCP) control frame message of the EPON based protocol to perform one or more test intervals;performing the one or more test intervals in synchrony with the frames of the EPON based 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; andduring the third time interval of a test interval, measuring a portion of the optical test signal.2. The method of claim 1 , wherein an MPCP control frame message of the EPON based protocol is used to schedule a PAUSE time ...

Managing Bidirectional Communication in Constrained Environments

Bidirectionally transmitting data between a first transceiver and a second transceiver over a transmission line includes communicating between the first transceiver and the second transceiver during a bidirectional communication phase within time slots. The time slots include: a plurality of upstream time slots in which the first transceiver transmits data to the second transceiver, a plurality of downstream time slots in which second transceiver transmits data to the first transceiver, wherein the downstream time slots are shorter than the upstream time slots, and a plurality of idle time slots separating adjacent upstream and downstream time slots.

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. 111-. (canceled)12. 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;a 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;a splitter configured to receive the first optical transmission service from the source on a single optical fiber and distribute the first optical transmission service onto a plurality of separate optical fibers;a passive optical component joining one of the plurality of separate optical fibers with a fiber carrying one of the plurality of unique wavelength pairs of the second optical transmission service to provide the first optical transmission service and the second optical transmission service on a single subscriber-side optical fiber.13. The system of claim 12 , wherein the passive optical component comprises an optical splitter.14. The system of claim 13 , further comprising a plurality of passive optical components including the passive optical component claim 13 , the plurality of passive optical components each joining a respective one of the plurality of separate optical fibers with one of a second plurality of fibers carrying a ...

Station-side device and wavelength control method

An OLT configures combinations of wavelength pairs used for upstream and downstream signals, in a wavelength multiplexing optical communication system which performs single-core bidirectional transmission of a plurality of upstream and downstream signals, in such a way that the maximum value of the chromatic dispersion delay amount calculated from each wavelength pair is less than the maximum value of the chromatic dispersion delay amounts calculated when the combinations of wavelength pairs used for upstream and downstream signals are both allocated from the short wave side.

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. 1. An optical network communication system , comprising:an optical hub including an intelligent configuration unit configured to monitor and multiplex at least two different optical signals into a single multiplexed heterogeneous signal;an optical distribution center configured to individually separate the at least two different optical signals from the multiplexed heterogeneous signal;at least one fiber segment connecting the optical hub and the optical distribution center, the at least one fiber segment configured to receive the multiplexed heterogeneous signal from the optical hub and distribute the multiplexed heterogeneous signal to the optical distribution center; andat least two end users, each including a downstream receiver configured to receive one of the respective separated optical signals from the optical distribution center.2. The system of claim 1 , wherein the intelligent configuration unit comprises a processor and a memory claim 1 , and an optical multiplexer.3. The system of claim 2 , wherein the intelligent configuration unit further ...

Method and apparatus enabling end-to-end resilience in PONs

The present invention relates to passive optical networks and more particularly to protecting a passive optical network A three way coupler for a Passive Optical Network (PON). Terminals Ta, Tb, Tc input optical signals a, b, c, respectively. At least one splitter splits for splitting optical signal a into signals a1 and a2, optical signal b into b1 and b2 and optical signal c into c1 and c2. At least one adder adds signals a1+c2, a2+b1 and b2+c1.

중앙 기지국에서 생성된 다파장 광의 루프백을 이용하는수동형 광통신망

본 발명에 따라 중앙 기지국과, 광섬유 링크를 통해 상기 중앙 기지국에 연결되며, 상기 중앙 기지국과 파장분할 다중화된 광신호를 이용하여 통신하는 가입자측 장치를 포함하여 구성된 수동형 광통신망에 있어서, 상기 중앙 기지국은, 제1 내지 제4 다중화 포트를 구비하며, 상기 제4 다중화 포트로 입력된 다파장 광을 다수의 채널로 역다중화하고, 상기 다수의 채널을 각각 증폭한 후 다중화하여 상기 제1 다중화 포트를 통해 출력하며, 상기 제3 다중화 포트로 입력된 상향 광신호를 역다중화하여 출력하고, 하향 광신호를 구성하는 채널들을 다중화하여 상기 제2 다중화 포트를 통해 출력하는 라우팅부와; 제1 내지 제3 포트를 구비하며, 상기 제1 및 제4 다중화 포트를 연결하는 광도파로형 루프 상에 배치되고, 상기 제1 포트로 입력된 다파장 광의 일부를 상기 제2 포트를 통해 출력하고, 그 나머지는 상기 제4 다중화 포트와 연결된 제3 포트를 통해 출력하는 분기부와; 상기 분기부의 제2 포트를 통해 입력된 다파장 광을 상기 가입자측 장치로 송신하고, 상기 가입자측 장치로부터 수신된 상향 광신호를 상기 제3 다중화 포트로 출력하는 순환부를 포함한다.

可向下兼容的pon共存性

一种设备包括光线路终端(OLT)组件、光纤网络单元(ONU)组件和与所述OLT组件和ONU组件耦合的光路由器组件。本发明还公开了一种网络，包括第一OLT、与第一OLT耦合且与至少一个第一类型ONU和至少一个第二类型ONU通信的第二OLT；还包括配置为执行一种方法的OLT，该方法包括将第一下行数据从第一类型OLT转发给至少一个第一类型ONU和将第二下行数据传送给至少一个第二类型ONU；还包括一种方法，其包括在不从所述PON中消除第一类型OLT的情况下，添加至少一个第二类型ONU到具有第一类型光OLT的无源光纤网络(PON)和至少一个第一类型ONU。

Method for operating wavelength-division-multiplexed passive optical network

본 발명에 따른 광선로 종단 장치와, 상기 광선로 종단 장치와 연결되며 각각 상기 광선로 종단 장치와 통신을 수행하는 복수의 광가입자 단말 장치를 포함하는 파장분할다중 방식의 수동형 광가입자망의 동작 방법은, (b) 복수의 광가입자 단말 장치들 각각으로 하향 데이터 채널의 할당 정보와 상기 하향 데이터 채널에 대한 타임 슬롯의 할당 정보를 갖는 제1 제어 채널을 송신하는 과정과; (c) 상기 제1 제어 채널의 정보에 따라 각각 적어도 하나의 타임 슬롯을 갖는 해당 하향 데이터 채널들을 이용하여 해당 하향 데이터들을 상기 광가입자 단말 장치들 각각으로 송신하는 과정을 포함한다. A method of operating a wavelength division multiplex type passive optical subscriber network comprising an optical fiber termination device and a plurality of optical subscriber terminal devices connected to the optical fiber terminal device and communicating with the optical fiber terminal device, respectively. (B) transmitting a first control channel having allocation information of a downlink data channel and allocation information of a time slot for the downlink data channel to each of the plurality of optical subscriber terminal devices; (c) transmitting corresponding downlink data to each of the optical subscriber terminal devices using corresponding downlink data channels having at least one time slot, respectively, according to the information of the first control channel.

Optical fiber, transmission system and multiple-wavelength transmission system

광섬유는 상기 광섬유 내에서 발생하는 음향 모드의 기본 모드의 제1 모드 필드 지름이 해당 광섬유의 광강도 분포의 제2 모드 필드 지름과 다르다. 또, 이 광섬유를 이용하여 아날로그 신호전송 또는 베이스밴드 전송 또는 광 SCM 전송을 수행하도록 전송 시스템이 구성되어 있다. In an optical fiber, the first mode field diameter of the basic mode of the acoustic mode occurring in the optical fiber is different from the second mode field diameter of the light intensity distribution of the optical fiber. In addition, a transmission system is configured to perform analog signal transmission, baseband transmission or optical SCM transmission using this optical fiber. 광섬유, 음향 모드, 필드 지름, 광강도 분포, 음향 필드 분포 Fiber Optic, Acoustic Mode, Field Diameter, Light Intensity Distribution, Acoustic Field Distribution

Device and method for fault management in loop-back wavelength division multiplexing passive optical network

본 발명은 루프백 형 파장분할다중방식을 이용한 수동형 광 네트워크(WDM-PON)의 장애 관리 장치 및 방법에 관한 것이다. The present invention relates to a failure management apparatus and method for a passive optical network (WDM-PON) using a loopback type wavelength division multiplexing method. 본 발명에 따른 루프백 형 파장분할다중방식 수동형 광 네트워크의 장애 관리 장치는, 중앙 기지국(CO)에 위치하며 복수의 가입자단(ONT) 별로 할당되고 각각 고유의 파장을 이용하여 하향신호를 출력하는 복수의 기지국 광원과, 상기 복수의 기지국 광원으로부터 출력된 신호를 다중화하는 기지국 광다중화기와, 상기 다중화된 상향 신호를 역다중화하여 파장별로 분할할 후 각각 해당하는 가입자단(ONT)으로 제공하는 옥외노드(RN) 광역다중화기와, 상기 복수의 가입자단(ONT)으로부터 재변조된 상향 신호를 다중화하는 옥외노드 광다중화기와, 상기 다중화된 상향신호를 파장별로 역다중화하는 기지국 광역다중화기, 및 상기 역다중화된 상향신호를 수신하여 복원하는 기지국 수신기를 갖는 루프백 형 파장분할다중방식의 수동형 광 네트워크에 있어서, 상기 기지국 광다중화기의 전단에 위치하는 제어 광원과, 상기 제어광원으로부터 상기 옥외노드 광다중화기로 전달된 제어광이 상기 중앙기지국(CO)으로 전송될 수 있도록 루프백하는 루프백수단과, 상기 루프백된 제어광을 수신하는 제어광 수신기 및 상기 기지국 수신기에 수신된 상향 신호의 파워에 따라 상기 기지국 광원의 온도를 변화시킴으로써, 상기 수신된 상향 신호의 파워를 최대로 유지하고, 상기 제어광 수신기에 수신된 제어광의 파워에 따라 상기 기지국 광다중화기 및 상기 기지국 광역다중화기 온도를 변화시킴으로써, 상기 수신된 제어광의 파워를 최대로 유지하는 제어부를 포함하는 것을 특징으로 한다. The fault management apparatus of the loopback type wavelength division multiplexing passive optical network according to the present invention is located in a central base station (CO) and is allocated to a plurality of subscriber stations (ONTs) and outputs a downlink signal using a unique wavelength. A base station light multiplexer, a base station optical multiplexer for multiplexing the signals outputted from the plurality of base station light sources, and an outdoor node for demultiplexing the multiplexed uplink signal and dividing the multiplexed uplink signal by a wavelength and then providing them to a corresponding subscriber station (ONT). RN) a wide area multiplexer, an outdoor node optical multiplexer for multiplexing up-modulated uplink signals from the plurality of subscriber stations (ONT), a base station wide multiplexer for demultiplexing the multiplexed uplink signals by wavelength, and the demultiplexed In a loopback type wavelength division multiplex passive optical network ...

Self-Healing Wavelength Division Multiplexing Passive Optical Subscriber Network

본 발명은 중앙 기지국과, 상기 중앙 기지국과 광섬유를 통해 연결되며 복수개의 가입자 장치와 광섬유를 통해 연결되는 지역 기지국을 포함하는 파장분할다중방식 수동형 광 가입자망에 있어서, 상기 중앙 기지국과 상기 지역 기지국을 연결하는 간선 동작 및 보호 광섬유와, 상기 지역 기지국과 상기 복수개의 가입자 장치를 각각 연결하는 분배 동작 및 보호 광섬유를 구비하고 상기 중앙 기지국은 상기 간선 동작 및 보호 광섬유에 각각 연결되어 장애 발생시 절체되는 광 스위칭 소자, 상향 데이터 수신을 위한 상향 동작 및 보호 광수신기 및 하향 데이터 전송을 위한 하향 동작 및 보호 광원을 포함하고, 상기 각 가입자 장치는 상기 분배 동작 및 보호 광섬유에 각각 연결되어 장애 발생시 절체되는 광 스위칭 소자, 하향 데이터 수신을 위한 하향 동작 및 보호 광수신기 및 상향 데이터 전송을 위한 상향 동작 및 보호 광원을 포함한다. The present invention provides a wavelength division multiplexing passive optical subscriber network comprising a central base station, a local base station connected to the central base station through an optical fiber, and connected to a plurality of subscriber devices via an optical fiber. Optical switching, which is connected to the trunk operation and protection optical fiber, and the distribution operation and protection optical fiber for connecting the local base station and the plurality of subscriber devices, respectively, wherein the central base station is connected to the trunk operation and protection optical fiber, respectively, and switched in the event of a failure An element, an uplink operation and a protection optical receiver for uplink data reception, and a downlink operation and protection light source for downlink data transmission, wherein each of the subscriber devices is respectively connected to the distribution operation and the protection optical fiber and switched in the event of a failure; Downlink for receiving downlink data And a protection optical receiver and upward motion and protecting the light source for the upstream data transmission.

Internetwork optical fiber sharing system

본 발명에 따라 제1 중앙 기지국과 제1 지역 기지국을 제1 간선 광섬유로 연결하는 제1 수동형 광가입자망과, 제2 중앙 기지국과 제2 지역 기지국을 제2 간선 광섬유로 연결하는 제2 수동형 광가입자망에서 발생하는 간선 광섬유 장애를 치유하기 위한 망간 광섬유 공유 시스템은, 상기 제1 간선 광섬유와 연결되며, 상기 제1 간선 광섬유로부터 제1 상향 파장 대역의 상향 광신호가 수신되지 않는 경우에 제2 광스위칭부를 통해 상기 제1 중앙 기지국과 상기 제2 간선 광섬유를 연결하는 제1 광스위칭부와; 상기 제2 간선 광섬유와 연결되며, 상기 제2 간선 광섬유로부터 제2 상향 파장 대역의 상향 광신호가 수신되지 않는 경우에 상기 제1 광스위칭부를 통해 상기 제2 중앙 기지국과 상기 제1 간선 광섬유를 연결하는 상기 제2 광스위칭부를 포함한다. According to the present invention, a first passive optical subscriber network connecting the first central base station and the first local base station with a first trunk fiber and a second passive optical link connecting the second central base station and the second local base station with a second trunk fiber A manganese optical fiber sharing system for treating trunk fiber failures occurring in a subscriber network is connected to the first trunk fiber, and a second optical fiber is not received from the first trunk fiber when an uplink optical signal of a first upstream wavelength band is not received. A first optical switching unit connecting the first central base station and the second trunk fiber through a switching unit; When the uplink optical signal of the second uplink wavelength band is not received from the second trunk optical fiber, the second central base station and the first trunk optical fiber are connected to each other through the first optical switching unit. The second optical switching unit is included. 수동형 광가입자망, 중앙 기지국, 지역 기지국, 자기 치유, 광섬유 공유 Passive Optical Subscriber Network, Central Base Station, Local Base Station, Self-Healing, Fiber Sharing

An optical transponder which can be reconfigured in accordance with various types of client network

종속망에 따라 재구성이 가능한 광트랜스폰더가 개시된다. 종속망 접속 트랜시버는 디지털 래퍼와 복수의 제1클럭신호, 복수의 제2클럭신호, 및 복수의 데이터신호를 송수신하기 위한 수단을 제공하는 제1연결단, 감시/제어부와 감시제어신호 및 CPU 관련신호를 송수신하기 위한 수단을 제공하는 제2연결단, 및 전원을 공급받기 위한 수단을 제공하는 전원단을 포함하는 커넥터를 구비하여 디지털 래퍼 및 감시/제어부에 탈착가능하게 결합되며, 종속망으로부터 전달받은 종속신호를 다중화하거나 광전달망으로부터 전달받은 신호를 역다중화하여 출력한다. 디지털 래퍼는 종속망 접속 트랜시버로부터 입력되는 STM-64/OC-192 신호 또는 복수개의 STM-16/OC-48 신호를 OTU2 신호로 매핑하거나 OTU2 신호를 STM-64/OC-192 신호 또는 복수개의 STM-16/OC-48 신호로 디매핑하며, 복수의 종속망 클럭 생성수단을 구비하여 종속망 접속 트랜시버에 필요한 제2클럭신호를 제공한다. OTN 접속 트랜시버는 광전달망으로부터 입력받은 OTU2 광신호를 디지털 래퍼로 전달하거나 디지털 래퍼로부터 입력받은 OTU2 광신호를 광전달망으로 전달한다. 감시/제어부는 종속망으로부터 종속망 접속 트랜시버로 입력되는 종속신호의 종류에 따라 하드웨어의 초기화 및 재설정을 수행하고, 각각의 구성요소의 성능 및 오류발생여부를 감시한다. An optical transponder is reconfigurable according to a subnetwork. The slave network connected transceiver is associated with a first connection stage, a supervisor / control unit, a supervisory control signal, and a CPU, which provides a means for transmitting and receiving a digital wrapper and a plurality of first clock signals, a plurality of second clock signals, and a plurality of data signals. Removably coupled to the digital wrapper and the monitoring / control unit having a connector comprising a second connection stage providing a means for transmitting and receiving signals, and a power stage providing a means for receiving power and transmitting from a slave network. Multiplexes the dependent signals received or demultiplexes the signals received from the optical transmission network and outputs them. The digital wrapper maps the STM-64 / OC-192 signal or the plurality of STM-16 / OC-48 signals into the OTU2 signal input from the slave access transceiver, or the OTU2 signal to the STM-64 / OC-192 signal or the plurality of STM signals. It demaps into a -16 / OC-48 signal and includes a plurality of slave network clock generation means to provide a second clock signal required for the slave network connected transceiver. The OTN-connected transceiver transmits the OTU2 optical signal ...

The long-reach wavelength division multiplexing passive optical networks by using the position adjustment of broadband light source

본 발명은 광대역 비간섭성 광원의 위치 조정을 이용한 장거리 전송 파장분할 다중방식 수동형 광 가입자망에 관한 것으로, 특히 광대역 비간섭성 광원(Broadband Light Source, BLS)의 위치를 조정함으로써 파장분할 다중방식 수동형 광 가입자망(Wavelength Division Multiplexing Passive Optical Network, WDM-PON)의 전송거리를 늘려 광 가입자망에서의 QoS(Quality of Service) 확보 및 전송비용 절감에 관한 것이다. BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a long-range transmission wavelength division multiplex passive optical subscriber network using position adjustment of a broadband incoherent light source. In particular, the present invention relates to a wavelength division multiplex passive passive type by adjusting the position of a broadband incoherent light source (BLS). The present invention relates to securing a quality of service (QoS) and reducing transmission costs in an optical subscriber network by increasing a transmission distance of a wavelength division multiplexing passive optical network (WDM-PON). 본 발명의 광대역 비간섭성 광원의 위치 조정을 이용한 장거리 전송 파장분할 다중방식 수동형 광 가입자망은 중심국, 지역노드 및 복수의 가입자 종단장치를 포함하는 장거리 전송 파장분할 다중방식 수동형 광 가입자망에 있어서, 하향신호를 위한 광원에 주입되는 A-밴드 광대역 비간섭성 광원, 상기 A-밴드 광대역 비간섭성 광원을 결합하기 위한 A-밴드 광대역 비간섭성 광원 결합장치, 상기 A-밴드 광대역 비간섭성 광원 결합장치에 연결되어 파장분할 다중화/역다중화하는 제1 파장분할 다중화기/역 다중화기 및 상기 제1 파장분할 다중화기/역 다중화기에 연결된 복수의 광 송수신기를 포함하는 중심국; B-밴드 광대역 비간섭성 광원을 결합하기 위한 B-밴드 광대역 비간섭성 광원 결합장치와 상기 B-밴드 광대역 비간섭성 광원 결합장치에 연결되어 파장분할 다중화/역다중화하는 제2 파장분할 다중화기/역 다중화기를 포함하고, 상기 중심국과 광섬유로 연결된 지역노드; 및 상기 제2 파장분할 다중화기/역 다중화기와 광섬유로 연결된 복수의 광 송수신기를 포함하는 상기 복수의 가입자 종단장치;를 포함하되, 상기 중심국, 지역노드 또는 복수의 가입자 종단장치 중에서 어느 하나가 상향신호를 위한 광원에 주입되는 B-밴드 광대역 비간섭성 광원을 더 포함한다. The long-distance transmission wavelength division multiplexing passive optical subscriber network using the position adjustment of the broadband incoherent light source of the present invention is a long-distance transmission wavelength division multiplexing passive optical subscriber network including a central station, a local node, and a plurality of subscriber termination devices. An A-band wideband non- ...

Self-healing passive optical network

본 발명에 따라 중앙 기지국과, 간선 광섬유를 통해 상기 중앙 기지국과 연결된 지역 기지국과, 복수의 분배 광섬유들을 통해 상기 지역 기지국과 연결된 복수의 가입자 장치들을 포함하는 수동형 광 가입자망은, 상기 각 가입자 장치는 직접 연결된 분배 광섬유를 통해 상기 지역 기지국으로 상향 광신호를 전송하고, 상기 지역 기지국으로부터 복귀하는 상기 상향 광신호의 상태로부터 장애 발생을 감지하며, 상기 지역 기지국은 상기 각 가입자 장치로부터 입력된 상향 광신호의 일부 파워를 상기 중앙 기지국으로 전송하고, 다른 일부 파워를 상기 가입자 장치로 복귀시킨다. According to the present invention, a passive optical subscriber network including a central base station, a local base station connected to the central base station through a trunk fiber, and a plurality of subscriber devices connected to the local base station through a plurality of distributed optical fibers, Transmitting an uplink optical signal to the local base station through a directly connected distributed optical fiber, detecting an occurrence of a failure from the state of the uplink optical signal returned from the local base station, wherein the local base station transmits an uplink optical signal input from each subscriber device Sends some power of to the central base station and returns some other power to the subscriber device.

Optical transmission system for transmitting signal of e-band with other bands

본 발명은 광통신을 수행함에 있어 Ｅ-밴드와 그 외 대역의 신호를 하나의 광섬유를 통해 동시에 전송할 수 있는 광전송 시스템에 관한 것으로서, E-밴드와 기타 대역의 광신호를 그 양면에 각각 입력받되, 일측면에 입력된 파장대역은 선택적으로 통과시키고, 타측면에 입력된 파장대역은 반사시켜 양측 광신호를 결합함으로써 다중화하는 제1박막필터; 상기 제1박막필터에 의해 다중화된 광신호를 수신단으로 전송하는 광섬유; 및 상기 광섬유를 통해 전송되는 광신호에서 E-밴드와 기타 대역을 선택적으로 분리하여 역다중화하는 제2박막필터;를 포함하는 광전송 시스템이 개시된다. The present invention relates to an optical transmission system capable of simultaneously transmitting signals of an E-band and other bands through one optical fiber in performing optical communication, and receiving optical signals of E-band and other bands on both sides thereof, respectively. A first thin film filter selectively passing the wavelength band input to one side and multiplexing by combining the optical signals on both sides by reflecting the wavelength band input to the other side; An optical fiber for transmitting an optical signal multiplexed by the first thin film filter to a receiving end; And a second thin film filter selectively separating and demultiplexing an E-band and other bands in the optical signal transmitted through the optical fiber.

Passive optical network for self monitoring

본 발명에 따른 수동형 광 가입자 망은 상향 광신호를 생성하고 해당 채널을 반사시키며, 해당 하향 광신호를 검출해내기 위한 복수의 가입자들과, 다중화된 하향 광신호들과 감시 광을 출력하며, 다중화된 채널들을 검출해내기 위한 중앙 기지국과, 상기 감시 광을 각각의 채널들로 역다중화시켜서 해당 가입자로 출력하며 상기 가입자들에서 반사된 상기 채널들을 다중화시켜서 상기 중앙 기지국으로 출력하기 위한 지역 기지국과, 상기 중앙 기지국과 상기 지역 기지국을 링크시키기 위한 제1 주 광섬유와, 상기 지역 기지국과 상기 가입자들 각각을 링크시키기 위한 복수의 제2 주 광섬유들을 포함한다. The passive optical subscriber network according to the present invention generates an uplink optical signal, reflects a corresponding channel, outputs multiplexed downlink optical signals and monitoring light, and multiplexes for detecting the corresponding downlink optical signal, and multiplexes. A central base station for detecting the decoded channels, a local base station for demultiplexing the monitoring light into respective channels and outputting the same to the subscriber, and multiplexing the channels reflected from the subscribers and outputting the channels to the central base station; A first primary optical fiber for linking the central base station and the local base station, and a plurality of second primary optical fibers for linking each of the local base station and the subscribers.

Wavelength division multiplexed light source and passive optical network using the same

본 발명에 따른 파장분할다중 방식의 광원은, 파장 축 상에서 주기적으로 배치되며, 각각 복수의 구성 파장을 갖는 기설정된 파장 대역의 광을 출력하는 복수의 광대역 광원과; 상기 광대역 광원들로부터 입력된 복수의 광을 다중화하여 출력하는 주 저밀도 파장분할 다중화기(M-CWDM)와; 상기 M-CWDM로부터 입력된 다중화된 광을 그 구성 파장들에 대응하는 채널들로 스펙트럼 분할함으로써, 각 그룹이 상기 파장 주기로 이격된 복수의 채널들을 갖는 복수 그룹의 채널들을 생성하는 고밀도 파장분할 다중화기(DWDM)를 포함한다. A wavelength division multiplex light source according to the present invention comprises: a plurality of broadband light sources periodically arranged on a wavelength axis and outputting light of a predetermined wavelength band having a plurality of constituent wavelengths; A main low density wavelength division multiplexer (M-CWDM) for multiplexing and outputting a plurality of light inputs from the broadband light sources; By spectral dividing the multiplexed light input from the M-CWDM into channels corresponding to its constituent wavelengths, a high density wavelength division multiplexer in which each group produces a plurality of groups of channels having a plurality of channels spaced at the wavelength period. (DWDM). 광원, 파장분할다중, 수동형 광가입자망, 파장분할 다중화기, 자유 파장 간격 Light source, wavelength division multiplexing, passive optical subscriber network, wavelength division multiplexer, free wavelength spacing

Long-reach wavelength division multiplexing passive optical networks by using the position adjustment of broadband light source

本发明涉及一种使用宽带光源(BLS)的位置调整的用于长距离传输的波分复用无源光网络(WDM－PON)，尤其涉及一种通过调整BLS的位置来扩展WDM－PON的传输距离以获得高质量的服务(QoS)并减少光网络中的传输成本的WDM－PON。根据本发明的WDM－PON包括：中心站(CO)，包括将入射到用于下行信号的光源中的A－波段BLS；A－波段BLS耦合装置，用于耦合A－波段BLS；第一波分复用器/多路分离器，连接到A－波段BLS耦合装置，用于复用/多路分离；以及多个第一光收发机，连接到第一波分复用器/多路分离器；远程节点(RN)，包括B－波段BLS耦合装置；以及第二波分复用器/多路分离器，连接到B－波段BLS耦合装置，用于复用/多路分离，并通过光纤连接到CO；以及多个光网络终端(ONT)，包括多个连接到第二波分复用器/多路分离器的第二光收发机，其中，多个ONT之一或RN进一步包括：B－波段BLS，将入射到用于上行信号的光源中。

FTTH System for Intergrationg Broadcasting and Communication By Using IEEE1394

1. 청구범위에 기재된 발명이 속하는 기술분야 1. TECHNICAL FIELD OF THE INVENTION 본 발명은 방송 통신 융합 시스템에 관한 것으로, 특히 FTTH(fiber to the home)에 관한 것임. The present invention relates to a broadcast communication convergence system, and more particularly to fiber to the home (FTTH). 2. 발명이 해결하려고 하는 기술적 과제 2. The technical problem to be solved by the invention 본 발명은 방송/통신 융합 FTTH 시스템에서 표준 인터페이스인 IEEE1394 전송 방법을 이용해서 방송/통신을 융합하여 전송함으로써, 다양한 채널의 방송을 수용하고, 가변 대역의 신호를 수용하는 것이 가능해지도록 하는 IEEE1394를 이용한 방송/통신 융합 FTTH 시스템을 제공하는데 그 목적이 있음. The present invention utilizes IEEE1394 to allow broadcasting of various channels and to accommodate signals of variable bands by converging and transmitting broadcast / communication using the IEEE1394 transmission method, which is a standard interface in a broadcast / communication FTTH system. The purpose is to provide a broadcasting / communication convergence FTTH system. 3. 발명의 해결 방법의 요지 3. Summary of the Solution of the Invention 본 발명은, 방송/통신 융합 FTTH(fiber to the home) 시스템에 있어서, 외부의 방송 사업자 및 통신 사업자를 통해 전달된 다수의 방송 신호와 통신 신호를 하나의 광신호(A)로 전달하기 위한 OLT(Optical Line Terminal); 상기 OLT로부터의 광 신호(A)를 수신하여 상기 다수의 방송 신호와 상기 통신 신호를 분리하여 광전변환하고, 상기 변환된 다수의 방송 신호를 각각의 가입자별로 스위칭하고, 상기 변환된 통신 신호를 상기 스위칭된 방송 신호와 결합하여 해당 가입자에게 하나의 광신호(B)로 전달하는 ONU(Optical Network Unit); 및 상기 ONU로부터의 광신호(B)를 수신하여 상기 스위칭된 방송 신호와 상기 통신 신호로 분리하고, 분리된 상기 방송 신호와 상기 통신 신호를 각각의 해당 가입자 장치로 전달하는 각각의 가입자 별 게이트웨이를 포함하고, 상기 ONU와 상기 각각의 가입자별 게이트웨이 간의 연결을 IEEE1394 방식으로 구현하는 것을 특징으로 함. The present invention, in the broadcast / communication convergence FTTH (fiber to the home) system, OLT for delivering a plurality of broadcast signals and communication signals transmitted through external broadcast operators and communication providers as one optical signal (A) (Optical Line Terminal); Receiving the optical signal (A) from the OLT and photoelectric conversion by separating the plurality of broadcast signals and the communication signal, switching the converted plurality of broadcast signals for each subscriber, ...

Wavelength division multiplexing passive optical network system

Method and apparatus for providing a wavelength division multiplexed passive optical network based on wavelength-locked wavelength division multiplexed light sources

波長分割多重パッシーブ光ネットワークに第１広帯域光源と第２広帯域光源が含まれる、様々な方法、システム、および装置。第１広帯域光源は、波長の第１帯域を含む光信号を第１の複数の光送信器に供給する。第２広帯域光源は、波長の第２帯域を含む光信号を第２の複数の光送信器に供給する。ファイバが、少なくとも２つの異なる波長帯域での光信号の両方向伝送に使用される。

Wavelength Division Multiplexed Self-Healing Passive Optical Network

1. 청구범위에 기재된 발명이 속하는 기술분야 1. TECHNICAL FIELD OF THE INVENTION 본 발명은 간선 및 분배 광섬유의 절단 및 열화를 감지하여 스스로 망을 복구할 수 있는 파장분할 다중방식 자기치유 수동형 광가입자망에 관한 것임. The present invention relates to a wavelength division multiplexing self-healing passive optical subscriber network capable of recovering a network by sensing cutting and degradation of trunk and distribution optical fibers. 2. 발명이 해결하려고 하는 기술적 과제 2. The technical problem to be solved by the invention 본 발명은 성형 구조를 갖는 광가입자망에서 간선 및 분배 광섬유의 절단 및 열화 등에 따른 망의 장애를 감지하여 스스로 망을 복구할 수 있는 파장분할 다중방식 자기치유 수동형 광가입자망을 제공하는데 그 목적이 있음. An object of the present invention is to provide a wavelength division multiplex self-healing passive optical subscriber network capable of recovering a network by sensing network failure caused by cutting and deterioration of trunk and distribution optical fibers in an optical subscriber network having a molded structure. has exist. 3. 발명의 해결 방법의 요지 3. Summary of the Solution of the Invention 본 발명은, 중앙 기지국과, 상기 중앙 기지국과 광섬유를 통해 연결되며, 다수개의 가입자 장치와 광섬유를 통해 연결되는 지역 기지국을 포함하는 파장분할 다중방식 수동형 광 가입자망에 있어서, 상기 중앙 기지국과 상기 지역 기지국을 연결하는 동작용 및 보호용 간선 광섬유와; 상기 중앙 기지국과 연결되는 상기 지역 기지국의 일단에 구비되어, 상기 중앙 기지국으로부터 전달되는 감시용 광 신호를 반사하기 위한 반사 장치와; 상기 지역 기지국과 연결되는 상기 중앙 기지국의 일단에 구비되어, 상기 반사된 감시용 광 신호를 감지하여 상기 동작용 및 보호용 간선 광 섬유의 이상 유무에 따른 제어 신호를 발생하기 위한 출력 감시단과; 상기 출력 감시단에 의해 발생된 제어 신호에 따라 상기 동작용 및 보호용 간선 광 섬유의 스위칭 동작을 수행하는 제 1 광 스위치를 포함함. The present invention provides a wavelength division multiplexing passive optical subscriber network comprising a central base station, a local base station connected to the central base station through an optical fiber, and connected to a plurality of subscriber devices via an optical fiber. A trunk optical fiber for operation and protection connecting the base station; A reflecting apparatus provided at one end of the local base station connected to the central base station, for reflecting an optical signal for monitoring transmitted from the central base station; An output monitoring unit ...

Optical device for bidirectional optical communication

Optical Communication System Capable of Analog Telephony Service

1. 청구범위에 기재된 발명이 속하는 기술분야 1. Technical field to which the invention described in the claims belongs 본 발명은 FTTH(fiber to the home) 시스템에 관한 것으로, 광 선로를 이용하여 가입자단까지 음성 전화 데이터를 전송하기 위한 시스템에 관한 것임. The present invention relates to a fiber to the home (FTTH) system, and more particularly, to a system for transmitting voice call data to a subscriber using an optical line. 2. 발명이 해결하려고 하는 기술적 과제 2. Technical Challenges to be Solved by the Invention 본 발명은 FTTH 광통신 시스템에서 음성 전화 신호에 대한 A/D 변환 및 D/A 변환 장치를 통해 음성 전화 서비스를 구현할 수 있도록 하는 광통신 시스템을 제공하는데 그 목적이 있음. An object of the present invention is to provide an optical communication system capable of implementing a voice telephone service through an A / D conversion and a D / A conversion device for a voice telephone signal in an FTTH optical communication system. 3. 발명의 해결 방법의 요지 3. The point of the solution of the invention 본 발명은, 소정의 수의 가입자에 대해 방송 서비스 및 데이터 통신 서비스를 제공하는 광통신 시스템에 있어서, 공중 전화망으로부터 상기 소정의 수의 가입자에 대한 아날로그 음성 전화를 전달받아 이를 각각의 가입자별로 분리하여 디지털 변환한 하향 음성 전화 데이터를 생성하고 상기 방송 서비스를 위한 방송 데이터 및 상기 데이터 통신 서비스를 위한 통신 데이터와 함께 다중화하여 광변환하여 상기 각각의 가입자별로 전달하고, 상향으로 전달된 광신호를 전기신호로 변환하여 상향 음성 전화 데이터를 역다중화하고 이를 아날로그 변환하여 상기 공중 전화망으로 전달하는 OLT(Optical Line Terminal); 상기 OLT로부터 전달된 광신호를 전기신호로 변환하여 상기 방송 데이터, 상기 통신 데이터 및 상기 디지털 변환된 하향 음성 전화 데이터를 역다중화하고 상기 역다중화된 하향 음성 전화 데이터를 아날로그 변환하여 가입자의 음성 전화기로 전달하며, 상기 가입자의 음성 전화기로부터의 아날로그 음성 데이터를 디지털 변환한 상향 음성 전화 데이터를 생성하여 상기 OLT에 대한 상향 통신 데이터와 다중화하여 상기 OLT로 전달하는 상기 소정의 수의 가입자에 대응되는 ONT(Optical Network Terminal); 및 상기 OLT로부터의 신호를 상기 다수의 ONT들로 분파하고, 상기 다수의 ONT들로부터의 신호를 상기 OLT로 결합하여 전달하는 광 분파기를 포함함. The present invention provides an optical communication system for providing a broadcasting service and a data communication service to a predetermined number of subscribers, comprising: an analog voice telephone for the predetermined number of subscribers from a public telephone network, Converts the multiplexed downward voice call data to broadcast data for the broadcast service and communication data for the ...

Media access control method for weighted fairness guarantee scheduling in ethernet passive optical network

본 발명은 이더넷 수동 광 네트워크(EPON) 시스템의 스케쥴링 방법에 관한 것이다. 본 발명은, 이더넷 수동 광 네트워크 시스템의 여러 광망 종단장치(ONU : Optical Network Unit) 로부터 광라인 터미널(OLT : Optical Line Terminal) 로의 상향 방향 링크를 공평하게 다중화하여 사용하기 위한 방안에 관한 것으로서, 다수의 광망 종단장치(ONU : Optical Network Unit)와 특정 광라인 터미널(OLT : Optical Line Terminal)를 구비하는 이더넷 수동 광 네트워크(EPON)에서의 매체 접근 제어 방법으로서, 상기 다수의 광망 종단장치에서 상기 특정 광라인 터미널로 한 사이클에서 전송할 수 있는 트래픽 전송량을 상기 다수의 광망 종단장치간 가중치에 비례해서 할당하는 제 1단계와, 상기 할당된 트래픽 전송량을 상기 다수의 광망 종단장치에 전송하기 위해 상기 특정 광라인 터미널장치의 트래픽 전송 알고리즘을 설정하는 제 2단계와, 상기 다수의 광망 종단장치가 상기 설정된 트래픽 전송 알고리즘에 따라 각각 한 사이클에서 트래픽이 존재하는 한 최대한의 트래픽을 특정 광라인 터미널로 전송하는 3단계와, 트래픽 할당량을 채우지 못한 경우 남은 할당량을 다음 사이클에 넘겨 사용하는 제 4단계를 포함하는 것을 특징으로 하는 이더넷 수동 광 네트워크의 가중치 공평성을 보장하는 매체 접근 제어 방법을 포함하여 이루어져 있다.

Wavelength locked fabry perot laser device with multi wavelength lasing source and optical transmitter using the same

본 발명은 파장분할 다중방식 광통신에 사용되는 경제적인 광원으로서, 고가의 외부 변조기를 사용하지 않고 구현 가능한 다파장 레이징 광원에 파장 잠김된 페브리-페롯 레이저 장치 및 이를 이용한 광 전송장치에 관한 것이다. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an economical light source used for wavelength division multiplex optical communication, and to a Fabry-Perot laser device wavelength-locked to a multi-wavelength laser light source that can be implemented without using an expensive external modulator, and an optical transmission device using the same. . 본 발명의 다파장 레이징 광원에 파장잠김된 페브리-페롯 레이저 장치는 입력 광신호를 증폭하는 광신호 증폭기와; 상기 증폭된 광신호 중 일부 광신호를 입력받아 파장분할 역다중화한 다음, 다시 파장분할 다중화하여 상기 광증폭기로 재전송하고, 상기 증폭된 광신호 중 나머지 광신호를 입력받아 파장분할 역다중화하여 상기 역다중된 신호에 파장잠김된 신호를 출력하는 레이저 광원; 및 상기 증폭된 광신호 중 나머지 광신호를 상기 레이저 광원으로 입력하고, 상기 레이저 광원으로부터 출력되는 다파장 레이징 광원에 파장 잠김된 광신호를 광전송 링크로 출력하는 제1 순환기를 포함하여 구성됨을 특징으로 한다. The Fabry-Perot laser device, which is immersed in the multi-wavelength laser light source of the present invention, includes an optical signal amplifier for amplifying an input optical signal; A part of the amplified optical signals is received, the wavelength division demultiplexing is performed, and then the wavelength division multiplexing is retransmitted to the optical amplifier, and the remaining optical signals of the amplified optical signals are input to the wavelength division demultiplexing to perform the reverse division. A laser light source for outputting a wavelength-locked signal to the multiplexed signal; And a first circulator for inputting the remaining optical signals of the amplified optical signals to the laser light source, and outputting an optical signal wavelength-locked to the multi-wavelength laser light source output from the laser light source to an optical transmission link. It is done.

OPTICAL TRANSMISSION SYSTEM AND RADIO

Method and apparatus for multiplexing in a wireless communication infrastructure

A network is provided that includes a plurality of antennas coupled over the network to a plurality of base stations. The network can be optical or constructed with RF microwave links. The base stations are configured to provide cellular transmission. A plurality of links couple the plurality of antennas and the plurality of base stations. At least one link of the plurality of links provides multiple transmission paths between at least a portion of the base stations with at least a portion of the antennas.

Method and apparatus for multiplexing in a wireless communication infrastructure

A network includes a plurality of antennas coupled to a plurality of base stations. The network can be optical or constructed with RF microwave links. The antennas and base stations are configured to transmit and receive digital signals representing cellular signals and the digital signals are exchanged over the network. A plurality of links couple the plurality of antennas and the plurality of base stations. At least one link of the plurality of links provides multiple transmission paths between at least a portion of the base stations and at least a portion of the antennas.

Communication system for analog and digital communication services

A first and a second interconnection unit comprising a respective first and a second communication interface, a first and a second electro-optical converter, and a multiplexing unit, is disclosed. The first interconnection unit is adapted to receive electrically transmitted analog and digital information, convert said information into electrically transmitted information, and to multiplex the information so as to enable transmission over a bidirectional link. The second interconnection unit is adapted to receive and de-multiplex the transmitted analog and digital information, to convert it back into electrically transmitted analog and digital information, and to output said information. A system comprising the first and second interconnection units is also disclosed. The system is adapted for supplying both analog services and digital services with communication information over the bidirectional link.

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

A WDM(Wavelength-Division Multiplexed) PON(Passive Optical Network) for implementing wavelength-independent operation of a wavelength-locked F-P(Fabry-Perot) LD(Laser Diode) by injecting a low-noise BLS(Broadband Light Source) is provided to enable high speed transmission more than 1Gb/s. A BLS has low-noise characteristics and an optical fiber is used for optical transmission. The first AWG(Arrayed Wavelength Grating) filters light transmitted from the BLS oscillated in plural oscillation modes by the number of 'n', and has a bandwidth larger than that of a single light mode of the BLS. The 'n' number of F-P LDs output wavelength-locked light according to the incoherent light injected through the first AWG. A circulator allows the wavelength-multiplexed light inputted through the first AWG and optical fiber so as to be outputted as bypassing. The second AWG demultiplexes the wavelength-multiplexed light into the 'n' number of groups and has a bandwidth larger than that of the injected incoherent light. The 'n' is the number of output ports of the first AWG or the second AWG or the number of channels of the wavelength-multiplexed signal.

Wavelength-division-multiplexing light source and wavelength-division-multiplexed passive optical network using the same

본 발명에 따른 광통신망용 광원은, 입력된 비편광된 광을 제1 및 제2 편광 성분들로 분리하기 위한 편광 분리기와; 상기 제1 편광 성분이 주입되며, 상기 제1 편광 성분에 의해 생성된 동일 파장의 제1 신호광을 출력하기 위한 제1 광 주입형 광송신기과; 상기 제2 편광 성분이 주입되며, 상기 제2 편광 성분에 의해 생성된 동일 파장의 제2 신호광을 출력하기 위한 제2 광 주입형 광송신기를 포함하며, 상기 편광 분리기는 상기 제1 및 제2 광 주입형 광송신기들로부터 입력된 상기 제1 및 제2 신호광들을 결합하여 출력한다. A light source for an optical network according to the present invention comprises: a polarization separator for separating input unpolarized light into first and second polarization components; A first light injection type optical transmitter which is injected with the first polarization component and outputs first signal light having the same wavelength generated by the first polarization component; The second polarization component is injected, and includes a second light injection type optical transmitter for outputting second signal light of the same wavelength generated by the second polarization component, wherein the polarization splitter comprises the first and second light The first and second signal lights inputted from the injection type optical transmitters are combined and output. 수동형 광 가입자 망, 편광 분리기, 광대역 광원, 파장분할 다중화기 Passive optical subscriber network, polarization splitter, broadband light source, wavelength division multiplexer

Wavelength division multiplexing passive optical network

본 발명에 따른 파장 분할 다중 방식의 수동형 광 가입자 망은 다중화된 하향 광신호와 감시광을 생성해서 출력하고 상향 광신호를 검출해내며, 귀환된 감시광으로부터 상기 하향 및 상향 광신호들의 파장 변화를 감시하기 위한 감시 수단을 더 포함하는 중앙 기지국과, 해당 하향 광신호를 검출하며 각각의 상향 광신호를 생성하기 위한 복수의 가입자들과, 상기 감시광을 상기 중앙 기지국으로 반사시키며 다중화된 하향 광신호들을 역다중화시켜서 해당 가입자로 출력하고, 상기 상향 광신호들을 다중화시켜서 상기 중앙 기지국으로 출력하기 위한 지역 기지국과, 상기 지역 기지국과 상기 중앙 기지국을 링크시키기 위한 제1 광선로와, 상기 지역 기지국과 상기 가입자들 각각을 링크시키기 위한 복수의 제2 광선로들을 포함한다. The wavelength division multiplexing passive optical subscriber network according to the present invention generates and outputs multiplexed downlink optical signals and supervisory lights, detects upstream optical signals, and changes wavelengths of the downlink and upstream optical signals from the returned supervisory light. A central base station further comprising monitoring means for monitoring, a plurality of subscribers for detecting a corresponding downlink optical signal and generating respective uplink optical signals, and reflecting the monitoring light to the central base station and multiplexing downlink optical signals The local base station for demultiplexing and outputting the multiplexed uplink optical signals to the central base station, a first optical path for linking the local base station and the central base station, and the local base station and the subscriber. A plurality of second optical paths for linking each of them. 파장 분할 다중화, 수동형 광 가입자 망 Wavelength Division Multiplexing, Passive Optical Subscriber Network

Optical passive network

A PON(Passive Optical Network) is provided to easily manage and monitor a network by generating a monitor signal to be used for an OTDR(Optical Time Domain Reflectometer). An OLT(Optical Line Terminal)(110) includes an OLT PMD(130) for generating a downstream optical signal and a monitor signal and detecting an upstream optical signal. ONUs(Optical Network Units)(160-1-160-n) detect the downstream optical signal, reflect the monitor signal to the OLT(110), and transmit data-modulated upstream optical signal during an assigned time slot. An optical fiber(101) connects the ONU(160-1-160-n) and the OLT(110).

WDM PON using injection locked optical sources

1. 청구범위에 기재된 발명이 속하는 기술분야 1. TECHNICAL FIELD OF THE INVENTION 본 발명은 파장분할다중방식(wavelength-division-multiplexed: WDM) 수동형 광 가입자망(passive optical network: PON)에 관한 것으로 특히 주입된 비간섭성 광원에 파장 잠김된 파장분할다중방식의 수동형 광 가입자망에 관한 것임. FIELD OF THE INVENTION The present invention relates to a wavelength-division-multiplexed (WDM) passive optical network (PON), in particular a wavelength-division multiplex passive optical subscriber network in which the wavelength is locked to the injected non-coherent light source. It is about. 2. 발명이 해결하려고 하는 기술적 과제 2. The technical problem to be solved by the invention 본 발명은 상하향 링크에 서로 동일한 파장의 주입광을 할당하여 수동형 광 가입자망의 효율을 증대시키고 필요한 비간섭성 광의 종류를 하나로 줄이며 상하향 링크에서 동일한 광 송수신기를 사용함으로 광 송수신기의 단가를 줄일 수 있는 TDD(Time Division Duplex)를 채용한 주입된 비간섭성 광에 파장 잠김된 광원을 이용한 파장분할다중방식 수동형 광 가입자망을 제공하는데 그 목적이 있음. The present invention increases the efficiency of a passive optical subscriber network by allocating injection light having the same wavelength to the uplink and downlink, reduces the type of incoherent light required to one, and reduces the cost of the optical transceiver by using the same optical transceiver on the uplink and the downlink. The purpose of the present invention is to provide a wavelength division multiplexing passive optical subscriber network using a wavelength-locked light source to injected incoherent light employing TDD (Time Division Duplex). 3. 발명의 해결 방법의 요지 3. Summary of the Solution of the Invention 본 발명은, 주입된 비간섭성 광에 파장 잠김된 광원을 이용한 파장분할다중방식 수동형 광 가입자망 장치에 있어서, 비간섭성 광신호를 방출하는 광대역 광원을 구비하여 상향 신호를 위한 경로 및 하향 신호를 위한 경로를 시간에 따라 제공하는 주입광 생성부; 상기 주입광 생성부에서 생성된 비간섭성 광신호를 전달받아 파장 잠김하여 하향 광 송신하고, 가입자 장치로부터의 상향 광신호를 전달받아 광 검출하는 중앙 기지국; 및 상기 주입광 생성부에서 생성된 비간섭성 광신호를 전달받아 파장 잠김하여 상향 광 송신하고, 상기 중앙 기지국으로부터의 하향 광신호를 전달받아 광 검출하는 상기 가입자 장치를 포함함. The present invention provides a wavelength division multiplexing passive optical subscriber network device using a light source whose wavelength is immersed in injected non-coherent light, and includes a broadband ...

Wavelength division multiplexing passive optical network system

본 발명은 파장분할다중방식 수동형 광가입자망(WDM-PON)의 광링크에서 중앙 기지국(CO)측이 이와 연결된 다수의 광가입자단(ONU)과의 송수신 파장을 용이하게 제어할 수 있도록 된 광가입자단의 파장제어가 가능한 파장분할다중방식 수동형 광가입자망 시스템에 대한 것으로서, 그 기술적 구성은 파장분할다중방식 수동형 광가입자망 시스템에 있어서, 각 광가입자단으로의 하향 전송 데이터가 실리는 제1 광신호를 생성하고 상기 제1 광신호와 FSR 간격을 가지며 각 광가입자단의 상향 전송 파장을 고정하는 제2 광신호를 각각 생성하여 하향 전송하는 중앙 기지국과, 상기 중앙 기지국으로부터 수신되는 상기 제1 및 제2 광신호를 스펙트럼 분할하여 각 광가입자단으로 역다중 전송하고 각 광가입자단의 상향 전송 광신호를 수신하여 상기 중앙 기지국으로 다중 전송하기 위한 지역 기지국 및, 상기 지역 기지국에 접속되어 상기 제1 및 제2 광신호를 수신하고 상기 중앙 기지국으로 상향 전송하는 광신호의 파장을 상기 제2 광신호의 파장으로 고정하여 전송하는 적어도 하나의 광가입자단을 포함하여 구성된 것을 특징으로 한다. The present invention is to enable the central base station (CO) side in the optical link of the WDM-PON passive optical subscriber network (WDM-PON) to easily control the transmission and reception wavelengths with a plurality of optical subscriber end (ONU) connected thereto A wavelength division multiplexing passive optical subscriber network system capable of controlling wavelength at a subscriber end. The technical configuration of the wavelength division multiplexing passive optical subscriber network system includes a first transmission of downlink transmission data to each optical subscriber stage. A central base station for generating an optical signal, and generating and transmitting a second optical signal having an FSR interval with the first optical signal and fixing an uplink wavelength of each optical subscriber end; and transmitting the first optical signal from the central base station; And spectrum-dividing a second optical signal to demultiplex each optical subscriber end and receiving an uplink optical signal of each optical subscriber end to the central base station. A local base station for multiplex transmission, and at least one wavelength of the optical signal connected to the local base station to receive the first and second optical signals and transmit the wavelength of the optical signal uplinked to the central base station to be fixed at the wavelength of the second optical signal. ...

The wavelength-division multiplexed passive optical network for reducing the degraded noise performance of wavelength-locked Fabry-Perot laser diodes

본 발명은 파장 잠김된 패브리 페롯 레이저 다이오드 잡음특성의 열화 감소를 위한 파장분할 다중방식 수동형 광 가입자망에 관한 것으로, 특히 파장 잠김된 패브리 페롯 레이저 다이오드 잡음 감소효과를 최대한 이용하여 1Gb/s 이상의 고속전송이 가능하고, 인접 가입자 채널에 의한 누화(crosstalk)를 줄일 수 있는 파장분할 다중방식 수동형 광 가입자망에 관한 것이다. The present invention relates to a wavelength division multiplexing passive optical subscriber network for reducing degradation of wavelength-locked Fabry-Perot laser diode noise characteristics. This invention relates to a wavelength division multiplexing passive optical subscriber network that is capable of reducing crosstalk by adjacent subscriber channels. 본 발명의 파장 잠김된 패브리 페롯 레이저 다이오드 잡음특성의 열화 감소를 위한 파장분할 다중방식 수동형 광 가입자망은 중심국, 지역노드 및 복수의 가입자 종단장치를 포함하는 파장분할 다중방식 수동형 광 가입자망에 있어서, 상기 중심국은, 넓은 대역의 광을 만들어내는 광대역 광원; 상기 광대역 광원에서 만들어진 광을 필터링하되, 주입되는 광의 대역폭보다 넓은 대역폭을 갖는 제1 파장분할 다중필터; 및 상기 제1 파장분할 다중필터에서 필터링된 광이 주입되는 복수의 광 송수신기;를 포함하고, 상기 지역노드는 상기 광대역 광원에서 만들어진 광대역 광을 필터링하여 상기 복수의 가입자 종단장치에 주입하되 주입되는 광의 대역폭보다 넓은 대역폭을 갖는 제2 파장분할 다중필터를 포함한다. A wavelength division multiplex passive optical subscriber network for reducing degradation of wavelength-locked Fabry-Perot laser diode noise characteristics of the present invention is a wavelength division multiplex passive optical subscriber network including a central station, a local node, and a plurality of subscriber termination devices. The central station includes a broadband light source for producing a wide band of light; A first wavelength division multiple filter which filters the light produced by the broadband light source and has a bandwidth wider than that of the injected light; And a plurality of optical transceivers into which the light filtered by the first wavelength division multiple filter is injected, wherein the local node filters the broadband light generated by the broadband light source and injects the broadband light into the plurality of subscriber end devices. And a second wavelength division multiple filter having a bandwidth wider than the bandwidth.

Method and network architecture for upgrading legacy passive optical network to wavelength division multiplexing passive optical network based next-generation passive optical network

A method and a network structure for upgrading a legacy PON into a next-generation PON based on a WDM-PON are provided to upgrade the legacy PON into the next-generation PON by using wavelength band combining/splitting apparatuses, thereby maintaining a currently used TDM(Time Division Multiplex)-based subscriber network system, using a preinstalled optical fiber and providing a broadband service through an increase of the number subscribers and the extension of bandwidth. A first wavelength band combining/splitting apparatus is positioned between a single mode optical fiber and a first OLT(Optical Line Termination) so that a second OLT which shares the single mode optical fiber and is used in a WDM-PON(Wavelength Division Multiplexing Passive Optical Network) can be added within a different CO(Central Office) which is positioned at a position different from that of a CO. A second wavelength band combining/splitting apparatus is positioned in the front end of a splitter. An AWG(Arrayed Waveguide Grating) is connected to the second wavelength band combining/splitting apparatus within an RN(Remote Node) or a different RN at a position different from that of the RN, and can be connected to at least one second group ONT(Optical Network Termination) by at least one second group splitting optical fiber.

Passive optical fiber net of loop of multiple wave length light generated by utilizing central location

一种包括中心局和通过光纤链路连接中心局的用户装置的无源光纤网。中心局具有带第一至第四复用端口的路由部分，将从第四复用端口输入的多波长光分解到多个信道；放大并复用每个分解的信道，通过第一复用端口输出。分解并上行输出通过第三复用端口输入的光信号，复用下行光信号的信道，通过第二端口输出复用的信道。分光部分带有第一至第三分光端口并布置在使第一和第四复用端口连接的环形光波导上，使一部分输入到第一分光端口的多波长光经第二分光端口输出，和使其余多波长光通过连接第四复用端口的第三分光端口输出。环行器使经第二分光端口输入的多波长光发送到用户，和使从用户接收的上行光信号输出到第三复用端口。

Bidirectional wavelength division multiplexing self-healing passive optical network

본 발명에 따른 양방향 파장분할다중 방식의 자기 치유 수동형 광 가입자망은, 생성된 다중화된 하향 광신호들을 파워 분할하여 제1 및 제2 간선 광섬유들로 전송하기 위한 중앙 기지국과; 상기 제1 및 제2 간선 광섬유들을 통해 상기 중앙 기지국과 연결되며, 입력된 한 쌍의 다중화된 하향 광신호들을 파장별로 역다중화하여 얻어진 복수 쌍들의 하향 광신호들을 각각 해당 분배 광섬유 쌍으로 전송하기 위한 지역 기지국과; 상기 복수의 분배 광섬유 쌍들을 통해 상기 지역 기지국과 연결되고, 각각 해당 분배 광섬유 쌍 중 하나와 선택 연결되며, 상기 선택된 분배 광섬유로부터 해당 하향 광신호를 수신하기 위한 복수의 가입자 장치들을 포함한다. 수동형 광 가입자망, 자기 치유, 분배 광섬유, 파장분할 다중화기

Dynamic bandwidth allocation and service differentiation for broadband passive optical networks

PON들상에서 업스트림 전송의 대역폭 효율을 개선하기 위해, 동적 업스트림 대역폭 할당 수단, 즉 제한된 공유 트래픽 예측(LSTP)이 개시된다. LSTP는 PON MAC 제어 메시지들을 적용하고 온라인 트래픽 부하에 따라 대역폭을 동적으로 할당한다. ONU 대역폭 요구조건은 이미 버퍼링된 데이터 및 입력 데이터의 예측을 포함하고, 이에 따라 프레임 지연을 감소시키며 데이터 손실을 경감한다. ONU들은 트래픽 예측을 용이하게 하기 위해 LSTP에서 고정된 순서로 OLT에 의해 제공된다. 각각의 광 네트워크 유닛(ONU)은 그 로컬 트래픽을 내림차순 우선순위들을 갖는 3개의 클래스둘로 분류한다: 신속한 포워딩(EF), 보장된 포워딩(AF), 및 최우선(BE). 더 높은 우선순위를 갖는 데이터는 버퍼가 찼을 때 더 낮은 우선순위를 갖는 데이터를 대체한다. 더 낮은 우선순위 데이터의 제어되지 않는 지연과 불공정한 드롭을 경감하기 위해, 특정 전송 타임슬롯에서 버퍼링된 데이터를 전달하도록 우선순위-기반 스케쥴링이 이용된다. 대역폭 할당은 서비스 레벨 협정들(SLAs)과 온라인 트래픽 다이내믹들을 포함한다. 기본적인 제한 공유 트래픽 예측(LSTP) 수단은 분류된 네트워크 트래픽을 보조하도록 확장된다. In order to improve the bandwidth efficiency of upstream transmission on PONs, dynamic upstream bandwidth allocation means, namely limited shared traffic prediction (LSTP), is disclosed. LSTP applies PON MAC control messages and dynamically allocates bandwidth according to the online traffic load. ONU bandwidth requirements include prediction of already buffered data and input data, thereby reducing frame delay and reducing data loss. ONUs are provided by the OLT in a fixed order in LSTP to facilitate traffic prediction. Each optical network unit (ONU) classifies its local traffic into three classes with descending priorities: fast forwarding (EF), guaranteed forwarding (AF), and top priority (BE). The higher priority data replaces the lower priority data when the buffer is full. Priority-based scheduling is used to deliver buffered data in specific transmission timeslots to mitigate uncontrolled delays and unfair drops of lower priority data. Bandwidth allocation includes service level agreements (SLAs) and online traffic dynamics. Basic limited shared traffic prediction (LSTP) means are extended to assist classified network traffic.

Ethernet passive optical network and l2 switching method

본 발명에 따라 L2 스위치를 포함하는 OLT(Optical Line Termination)와 상기 OLT와 연결되어 있으며, 각각 적어도 하나 이상의 서비스 포트나 가입자 포트를 포함하는 다수의 ONU(Optical Network Unit)를 포함하여 구성된 이더넷 수동형 광가입자망의 L2 스위칭 방법은, 상기 각 ONU에 연결된 하나 이상의 서비스 포트나 가입자 포트에 각각 소정 PHY ID를 부여하는 과정과; PHY ID 태깅/디태깅 레이어를 이용하여 전송 프레임에 PHY ID를 태깅/필터링하는 과정과; 상기 ONU에 연결된 소정 포트를 목적지로 하는 이더넷 프레임이 상기 OLT로 수신된 경우에 상기 포트에 할당된 L2 스위치의 포트를 통해 전송하는 과정을 포함한다. According to the present invention, an Ethernet passive optical fiber (OLT) including an L2 switch and an Ethernet passive optical fiber connected to the OLT and including a plurality of optical network units (ONUs) each including at least one service port or a subscriber port are included. The L2 switching method of a subscriber network includes: assigning predetermined PHY IDs to at least one service port or a subscriber port connected to each ONU; Tagging / filtering the PHY ID in the transmission frame using the PHY ID tagging / detagging layer; And transmitting an Ethernet frame destined for the predetermined port connected to the ONU through the port of the L2 switch assigned to the port when the Ethernet frame is received by the OLT. 이더넷, 수동형 광가입자망, 스위치 Ethernet, Passive Optical Subscriber Network, Switch

Potical communication system in subscriber's loop

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Multi-channel wavelength division multiplexer system

(57)【要約】 マルチチャネル波長分割マルチプレクサ・システムにおいて単一の光ファイバ(18)を介し、各々が第１波長を有する少なくとも第１および第２光信号の同時的双方向送信は、夫々の光送信器(74、4)を他方の光送信器の光信号から電気的に分離(76、6)することで提供される。

Method and system for providing a return data path for legacy terminals by using existing electrical waveguides of a structure

A return path may include a modem pair that is coupled to existing electrical waveguides in a structure such as a house or office building. Specifically, a first modem of the modem pair may be coupled to a first end of a coaxial cable and to a video service terminal. A second modem of the modem pair may be coupled to a second end of the coaxial cable and a data interface. The first modem can modulate video control return packets onto an RF carrier that is propagated over the coaxial cable to the second modem. The video control return packets can be formatted as Ethernet type packets. The second modem can demodulate the RF carrier to extract the video control return packets and to forward these packets towards a data service hub.

Optical clock signal distribution system in WDM network

一种在WDM网络中光时钟信号的分布系统，特别是一种用于控制在构成光通信网的光传输单元之间的时钟同步的系统，该系统包括：光时钟产生装置，用于把PRC级别(主参考时钟)的时钟信号变换成具有波长λ 0 的光时钟信号；波长复用装置，用于波长复用具有波长λ 0 的光时钟信号与其他的光波长数据；以及用于把具有波长λ 0 的光时钟信号解复用到网络的设备中的一个装置中，其特征在于，在网络的上述的设备中，上述的其他光波长数据通过使用上述解复用出的、具有波长λ 0 的光时钟信号作为参考时钟而被处理。

Optical transmission method, involves sending data to several units comprising receivers to receive data according to light signals with different wavelengths so that each unit receives data associated according to specific wavelength

The method involves sending data from a unit (1) to several units (3) using an emitter (7), where the data is carried by a light signal (S) having a unique wavelength. The units (3) have receivers (9) to receive the data according to several light signals having different wavelengths so that each unit (3) receives the data that are associated according to a specific wavelength. The signal (S) is amplitude multiplexed and whose unique wavelength is transformed into several wavelengths by a non-linear spectral shifting effect. The units (1, 3) are connected using a passive optical network (5).

Optical access communications network

For subscriber access, via optical fibre, to communications networks that offer various types of service by means of an optical access node (AN). The connections between the optical network terminating equipments (ONT), to which the subscribers are connected, and the access node (AN) can be made with point-to-point or point-to-multipoint fibre optic links. The links between the access node (AN) and the switching centre (CE) are made via optical fibres through which pass the lightwave signals corresponding to a number of subscribers, multiplexed together by means of wavelength division multiplexing. This network permits access to all types of communications services in which each type of service employs a reserved wavelength for its connection between the access node (AN) and the optical network terminating equipment (ONT). This reserved wavelength is fixed and depends only on the type of service.

COMMUNICATION NETWORK (D) WDM WITH PERIODIC PROCESSING OF SPECTRAL MULTIPLEX

The network (R) has communication stations (S1-Sn), and a demultiplier (DX) that is of periodic type so as to deliver at each of its output channels whose wavelengths belong to distinct set of wavelengths each belonging to a distinct one of disjoint bands. The stations are adapted to deliver spectral multiplexes of modulated optical signals from a given one of disjoint bands of wavelengths.

A wavelength division multiplexing passive optical network with bi-dir ectional optical spectral slicing

A passive optical network is provided that spectrally slices optical signals transmitted in both upstream and downstream directions utilizing wavelength division multiplexing routing. The passive optical network preferably includes an incoherent signal source at both ends to provide signals that are spectrally sliced according to optical frequency. The downstream information may be transmitted in a conventional data format. The upstream transmissions may be segregated by subcarrier multiplexing, time scheduling or wavelength division multiplexing.

METHOD FOR CORRECTING DELAY ASYMMETRY

Information e.g. video, transmission system for e.g. aircraft, has electronic transmission circuits and electronic reception circuits respectively connected to optical detectors and optical sources

The system has an optical fiber (F1) comprising two diffraction networks (RZ1, RZ2) for introducing and removing light beam into/from the fiber. Optical sources (E1, E2) and optical detectors (D1, D2) are coupled to the networks. Electronic transmission circuits (Ce1, Ce2) and electronic reception circuits (Cd1, Cd2) are respectively connected to optical detectors and optical sources. Transmitting aerials (Ae1, Ae2) and receiving aerials (Ad1, Ad2) are respectively connected to the transmission circuits and the reception circuits.

TELECOMMUNICATIONS NETWORK.

Le réseau de l'invention combine un réseau optique multicolore (R1) à commutation de circuits et un réseau à commutation de paquets (R2). Application aux télécommunications. The network of the invention combines a circuit-switched multicolor optical network (R1) and a packet-switched network (R2). Application to telecommunications.

Distribution system for a local area network

ABSTRACT: "Distribution system for a local area network." A distribution system for a local area network comprises a distribution unit (1) which is coupled to a plurality of subscriber's premises via optical transmission links (2). Each subscriber is provided with a terminal unit (3) whose input (100) is coupled to the optical transmission link (2) The terminal unit (3) has a plurality of outputs (10-18) which are connected to wall sockets (20-28). Equip-ment (I-IV) such as telephones, television sets, video recorders, computers, are attached to the wall sockets. Each terminal unit (3) comprises a power splitter (4) and a distribution box (5). The distribution box (5) has a plu-rality of inputs (6-9) and a larger number of outputs (10-18) and has a plurality of links between the inputs (6-9) and outputs (10-18). The optical transmission system is tolerant to future system modifications and extensions, such as the choice of analogue or digital signals, bandwidth, bit rate, number of services and connections per subscriber.

Telecommunication Broadcating Multiplexer and Demultiplexer for Using Integrating System of Broadcasting and Telecommunication

1. 청구범위에 기재된 발명이 속하는 기술분야 1. TECHNICAL FIELD OF THE INVENTION 본 발명은 파장분할 다중화(WDM : Wavelength Division Multiplexing)를 이용한 수동형 광 가입자 망(PON : Passive Optical Network)에 관한 것임. The present invention relates to a passive optical network (PON) using wavelength division multiplexing (WDM). 2. 발명이 해결하려고 하는 기술적 과제 2. The technical problem to be solved by the invention 본 발명은 선택적 채널 선정 기법을 이용하여 방송과 통신 서비스를 융합하는 광가입자 네트웍 시스템에서 통신/방송을 전송 표준을 적용하여 다중화 역다중화하기 위한 통신/방송 다중화기를 제공하는데 그 목적이 있음. An object of the present invention is to provide a communication / broadcast multiplexer for multiplexing and demultiplexing a communication / broadcasting transmission standard in an optical subscriber network system using a selective channel selection technique. 3. 발명의 해결 방법의 요지 3. Summary of the Solution of the Invention 본 발명은, 방송 통신 융합 시스템에서 디지털 방송 데이터와 통신 데이터를 융합하여 전송하기 위한 통신/방송 다중화 장치에 있어서, 상기 방송 통신 융합 시스템의 OLT(Optical Line Terminal)의 방송 스위치를 통해 각각의 가입자별로 스위칭된 방송 데이터를 입력받아 동기화 이더넷 프레임으로 전달하는 방송 데이터 입력부; 상기 OLT의 이더넷 스위치를 통해 상기 가입자별로 전달되는 통신 데이터를 입력받아 비동기화 데이터 프레임으로 전달하는 통신 데이터 입력부; 및 전달된 상기 동기화 데이터 프레임 및 상기 비동기화 데이터 프레임을 시간 분할 다중화된 동기화 이더넷 프레임으로 구성하여 출력하는 동기화 이더넷 프레이머를 포함함. The present invention provides a communication / broadcast multiplexing apparatus for fusion and transmission of digital broadcast data and communication data in a broadcast communication convergence system, wherein each subscriber is provided through a broadcast switch of an optical line terminal (OLT) of the broadcast communication convergence system. A broadcast data input unit configured to receive the switched broadcast data and deliver the switched broadcast data to a synchronous Ethernet frame; A communication data input unit configured to receive communication data transmitted for each subscriber through an Ethernet switch of the OLT and transmit the received communication data to an asynchronous data frame; And a synchronous Ethernet framer configured to output the synchronous data frame and the unsynchronized ...

Bidirectional, multi-wavelength gigabit optical fiber network

A bidirectional, multi-wavelength fiber optical network that enables communication between electrical components (such as line replaceable units) at high data transmission rates. The proposed fiber optical network in accordance with some embodiments comprises a single plastic or glass optical fiber capable of transmitting data at rates faster than 1 Gbits/sec. In accordance with some embodiments, the number of fiber cables between line replaceable units onboard an airplane can be reduced by a factor of eight or more by substituting one gigabit plastic or gigabit glass optical fiber for four or more plastic or glass optical fibers.

Telecommunication network.

Le réseau de l'invention combine un réseau optique multicolore (R1) à commutation de circuits et un réseau à commutation de paquets (R2). Application aux télécommunications. The network of the invention combines a circuit switched multicolor optical network (R1) and a packet switched network (R2). Application to telecommunications.

MULTISERVICE PRIVACY NETWORK AND INTERFACE MODULES FOR VEHICULATING DATA IN DIFFERENT FORMATS ON SUCH A NETWORK

L'invention concerne un réseau privatif multiservices et des modules d'interface (M1-M5), chacun de ces modules étant dédié pour interfacer un équipement terminal (T1-T4, GTW) donné dans le réseau privatif multiservices. Les modules d'interface (M1-M5) sont connectés un à un aux équipements terminaux. Chaque module d'interface (M1-M5) est agencé de manière à émettre et/ou recevoir des données se présentant sous un format adapté à l'équipement terminal qui lui est connecté, à une longueur d'onde spécifique, pour interconnecter, à travers ledit réseau privatif, au moins deux équipements terminaux compatibles entre eux parmi tous les équipements terminaux.L'invention trouve typiquement son application notamment dans l'interconnexion, par un même réseau, de différents équipements terminaux hétérogènes, de manière à ce que les terminaux compatibles entre eux communiquent directement les uns avec les autres, sans interférer avec les communications entre les autres terminaux de nature différente. The invention relates to a multiservice private network and interface modules (M1-M5), each of these modules being dedicated for interfacing a given terminal equipment (T1-T4, GTW) in the multiservice private network. The interface modules (M1-M5) are connected one by one to the terminal equipment. Each interface module (M1-M5) is arranged to transmit and / or receive data in a format suitable for the terminal equipment connected to it, at a specific wavelength, for interconnecting, through said private network, at least two terminal equipment compatible with each other among all the terminal equipment. The invention typically finds its application in particular in the interconnection, by the same network, of different heterogeneous terminal equipment, so that the terminals compatible with each other communicate directly with each other, without interfering with communications between other terminals of a different nature.

A wavelength division multiplexing passive optical network with bi-dir ectional optical spectral slicing

A passive optical network is provided that spectrally slices optical signals transmitted in both upstream and downstream directions utilizing wavelength division multiplexing routing. The passive optical network preferably includes an incoherent signal source at both ends to provide signals that are spectrally sliced according to optical frequency. The downstream information may be transmitted in a conventional data format. The upstream transmissions may be segregated by subcarrier multiplexing, time scheduling or wavelength division multiplexing.

MULTI-WAVELENGTH RING NETWORK FOR CONNECTING USERS, ESPECIALLY PROFESSIONAL USERS

The multiple wavelength ring network has two single direction fibre optical rings (F1,F2). The rings have nodes (N1..N4) with optical pointers (A1 to A4). The nodes are connected to the user transmission equipment (M1 to M4). Two Fibre optical cables (FR1,FR2) connect the terminals to the nodes. Each terminal has an assigned wavelength, which is extracted from the optical ring by switching the optical pointer.

COMMUNICATION NETWORK (D) WDM WITH PERIODIC PROCESSING OF SPECTRAL MULTIPLEX

Un réseau WDM (R) comprend une fibre optique (F) raccordée à un noeud d'accès (H), par une entrée d'un démultiplexeur (DX) comprenant N sorties,et à des stations de communication (S1-Sn) propres à délivrer et/ou recevoir des multiplex spectraux de signaux optiques modulés de différentes longueurs d'onde, par des moyens de couplage (CP, CP', MXB). Les stations de communication (Sn-1) sont agencées pour délivrer des multiplex spectraux de signaux optiques modulés d'une bande de longueurs d'onde donnée parmi P_disjointes. L'un au moins des moyens de couplage (MXB) est un multiplexeur de bandes de type 2x1 comprenant i) une sortie raccordée à une portion aval de la fibre optique (F), ii) une première entrée raccordée à l'une des stations (alors dite « primaire ») et adaptée à sa bande de longueurs d'onde, et iii) une seconde entrée raccordée à une portion amont de la fibre optique (F) et adaptée à des canaux dont les longueurs d'onde sont différentes de celles des canaux passant par la première entrée. Par ailleurs, le démultiplexeur (DX) est de type périodique de manière à délivrer sur chacune de ses N sorties des canaux dont les longueurs d'onde appartiennent à des ensembles distincts de P longueurs d'ondes, qui chacune appartiennent à une bande distincte parmi les P bandes disjointes. A WDM network (R) comprises an optical fiber (F) connected to an access node (H), by an input of a demultiplexer (DX) comprising N outputs, and to own communication stations (S1-Sn) in delivering and / or receiving spectral multiplexes of modulated optical signals of different wavelengths, by coupling means (CP, CP ', MXB). The communication stations (Sn-1) are arranged to deliver spectral multiplexes of modulated optical signals of a given wavelength band among P_disjoints. At least one of the coupling means (MXB) is a 2x1 type tape multiplexer comprising i) an output connected to a downstream portion of the optical fiber (F), ii) a ...

DISTRIBUTION SYSTEM FOR LOCAL FIBER NETWORK

SYSTEME DE TRANSMISSION OPTIQUE TRANSPARENT PERMETTANT DES MODIFICATIONS ET DES AGRANDISSEMENTS DU SYSTEME DANS L'AVENIR, COMME LE CHOIX DES SIGNAUX ANALOGIQUES OU NUMERIQUES, LA LARGEUR DE BANDE, LE RAPPORT DE BIT, LE NOMBRE DE SERVICES ET LES CONNEXIONS PAR ABONNE. APPLICATION: TRANSMISSION D'INFORMATION A L'INTERIEUR D'UN FOYER DOMESTIQUE. TRANSPARENT OPTICAL TRANSMISSION SYSTEM ALLOWING FUTURE CHANGES AND EXPANSIONS OF THE SYSTEM, SUCH AS THE CHOICE OF ANALOG OR DIGITAL SIGNALS, BANDWIDTH, BIT RATIO, NUMBER OF SERVICES AND CONNECTIONS PER SUBSCRIBER. APPLICATION: TRANSMISSION OF INFORMATION WITHIN A DOMESTIC FIREPLACE.

Optical transmission system for cable television signals and video and telecommunication signals

Method and system for multiplexed optical information transport

Light carrying information for access terminals is carried via optical fibers. Information for terminals from groups is multiplexed over different time-slots and different communication wavelengths of the light in the fiber for a group. The information is passed between the fibers and the transport network via transceivers. The use of the transceivers is multiplexed between the optical fibers. Each transceiver passes information for selectable light guides at selectable communication wavelengths in different timeslots.

Fabry-perot laser apparatus mode-locked to multi-frequency lasing light source and optical transmission apparatus using the same

Pluggable optical diplexer/triplexer module

The invention is directed to a pluggable module and mounting socket for use in an optical network terminal (ONT). In particular, the mounting socket accepts a pluggable module comprising either a dual-section triplexer card or a single-section diplexer card, thereby allowing a vendor to selectively change the type of PON transport by simply changing the diplexer/triplexer pluggable module to support either diplexer or triplexer applications. The ability to configure the ONT by swapping out the pluggable diplexer/triplexer module eliminates the need for a manufacturer to maintain two different versions of the ONT, i.e., with or without video.

Optical fiber telecommunication line with separate, optically transmitted service channels

An optical fiber transmission line which includes units for injecting into, and units for extracting, optical service signals from the line's optical fiber. The units include optical service signal emitters and receivers for receiving from the optical line and/or injecting into the optical line service signals in the form of optical signals having a wavelength which is substantially different from the wavelength of the telecommunication signals also transmitted over the optical line, each of the units is associated with an optical coupler which is inserted in the line and which is suitable for coupling it with the line fiber and/or for extracting the optical service signals from the line fiber.

Wavelength division multiplexing passive optical network and optical source generating method

파장분할다중방식 수동형 광가입자망 시스템 및 광원 생성 방법이 개시된다.중앙 기지국은 지역 기지국의 다중화 필터의 주기 간격과 일치하는 모드 간격을 가지며 광가입자단의 상향 전송 광신호를 제어하는 멀티모드 광을 생성하고, 지역 기지국은 멀티모드 광을 다중화 필터를 통해 다중화하여 광가입자단으로 전송하고, 상향 전송 광신호를 역다중화하여 중앙 기지국으로 전송하며, 광가입자단은 다중화된 멀티모드 광을 주입광원으로 하는 페브리-페롯 레이저를 통해 데이터를 변조하여 상향 전송 광신호를 생성한다. 이로써, 중앙 기지국에서 생성한 주입 광원을 이용하여 광가입자단 송신부의 파장 제어가 가능하다. A wavelength division multiplexing passive optical subscriber network system and a method of generating a light source are disclosed. The local base station multiplexes the multimode light through the multiplexing filter and transmits it to the optical subscriber end, demultiplexes the uplink transmission signal to the central base station, and the optical subscriber end transmits the multiplexed multimode light to the injection light source. The uplink optical signal is generated by modulating data through a Fabry-Perot laser. As a result, wavelength control of the optical subscriber end transmitter can be performed using the injection light source generated by the central base station.

Image pickup system

(57)【要約】 【課題】 送信部（カメラヘッド）と受信部（ＣＣＵ） 間の長距離光伝送機能を備えた垂直走査線1125本の飛び 越し走査画像を出力する撮像システムにおける伝送部の P/S 変換器やS/P 変換器、またE/O 変換器やO/E 変換器 等を用いて、ＣＣＵより垂直走査線1125本の順次走査画 像を出力する撮像システムを提供する。 【解決手段】 送信装置では、1125系順次走査３板ＣＣ Ｄ100 とＡ／Ｄ変換器101 とGBR →YPbP変換器103 とＹ 信号時分割器104 と２つのＰ／Ｓ変換器105 、106/と２ つのＥ／Ｏ変換器107 、108 と光波長多重器110 とを備 え、受信装置では、光波長分離器201 と２つのO/E 変換 器202 、203 と２つのS/P 変換器204 、205 とＹ信号合 成器205 とを備える。

Broadcast type optical network system using loop shaped optical networks

A network system capable of delivering a large amount of data such as video data freely according to the intentions of the sender and the receiver alone is realized by a plurality of stations provided on at least one loop shaped optical network in which any one of the plurality of stations is capable of carrying out unidirectional communications with respect to any other one of the plurality of stations, where at least one wavelength is allocated to each station such that each station can transmit data by using a wavelength allocated to each station, receive data of any wavelengths transmitted from any other stations, and select only necessary wavelengths so as to select correspondent stations from which data are to be received.

FTTH system for broadcast/communication convergence using IEEE 1394

A broadcast/communication convergence system, and an FTTH (Fiber To The Home) system that can accommodate broadcast signals of various channels and variable band signals by converging broadcast and communication signals and transmitting the converged broadcast and communication signals using an IEEE 1394 transmission method serving as a standard interface in the FTTH system for broadcast/communication convergence. An OLT (Optical Line Terminal) transfers a plurality of broadcast signals and a communication signal received from external broadcast and communication providers through a single optical signal (A). An ONU (Optical Network Unit) receives the optical signal (A) from the OLT, separates the received optical signal into the plurality of broadcast signals and the communication signal, opto-electrically converts the plurality of broadcast signals and the communication signal, switches the converted broadcast signals subscriber by subscriber, combines the converted communication signal with the switched converted broadcast signals. The result is transferred to a corresponding subscriber through a single optical signal (B). A gateway at each subscriber is implemented by IEEE 1394 protocol to receive the optical signal (B) from the ONU, separate the received optical signal into the broadcast signals and the communication signal, and transfer the broadcast signals and the communication signal to a corresponding subscriber device.