Настройки

Укажите год
-

Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

Подробнее
-

Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 1394. Отображено 100.
05-01-2017 дата публикации

INTEGRATED OPTICAL MODULATOR OF THE MACH-ZEHNDER TYPE

Номер: US20170003571A1
Автор: Carpentier Jean-Francois, LeMaitre Patrick, Pache Denis
Принадлежит:

An integrated modulator of the Mach-Zehnder type includes two optical arms containing waveguides with PN junctions and biasing circuits for reverse biasing the PN junctions in response to a control signal. The two optical arms are situated within a semiconductor substrate of a first element that also has an interconnection region. The biasing circuits are situated, in part, within a substrate of a second element that also contains an interconnection region. The first and second elements are rigidly attached to each other via their respective interconnection regions. 1. An integrated modulator of the Mach-Zehnder type , comprising:two optical arms containing waveguides with PN junctions; anda biasing circuit configured to bias the PN junctions in response to a control signal;wherein the two optical arms are situated within a semiconductor substrate of a first element having an interconnection region covering the semiconductor substrate;wherein the biasing circuit is situated, in part, within a substrate of a second element also having an interconnection region; andcircuit connections situated within the interconnection regions of the two elements;wherein the two elements are rigidly attached together through their respective interconnection regions.2. The modulator according to claim 1 , wherein the circuit connections comprise: the interconnection regions including metal bonding pads rigidly attached together in such a manner as to form electrically-conducting pillars.3. The modulator according to claim 2 , wherein the biasing circuit comprises control circuit components situated within the substrate of the second element.4. The modulator according to claim 3 , wherein the circuit connections comprise first electrically-conducting links situated within the interconnection region of the first element and coupled to the waveguides with PN junctions claim 3 , pillars coupled to the first electrically-conducting links and second electrically-conducting links situated ...

Подробнее
Номер записи: 1
02-01-2020 дата публикации

OPTICAL SCANNING DEVICE, PHOTORECEIVER DEVICE, AND PHOTODETECTION SYSTEM

Номер: US20200003873A1
Автор: HASHIYA AKIRA, HIRASAWA TAKU, INADA YASUHISA, NAGAO Nobuaki, YAMAOKA YOSHIKAZU
Принадлежит:

An optical scanning device includes: first and second mirrors; an optical waveguide layer disposed between the first and second mirrors; a pair of electrodes sandwiching the optical waveguide layer; and a driving circuit that applies a voltage to the pair of electrodes. The first mirror has a higher light transmittance than the second mirror and emits part of light propagating through the optical waveguide layer to the outside. The optical waveguide layer contains a liquid crystal material or an electrooptical material. The alignment direction of the liquid crystal material or the direction of a polarization axis of the electrooptical material is parallel or perpendicular to the direction in which the optical waveguide layer extends. The driving circuit applies the voltage to the pair of electrodes to change the refractive index of the liquid crystal material or the electrooptical material to thereby change the light emission direction. 1. An optical scanning device comprising:a first mirror including a multilayer reflective film;a second mirror including a multilayer reflective film facing the multilayer reflective film of the first mirror;an optical waveguide layer that is disposed between the first mirror and the second mirror and that propagates inputted light as propagating light;a pair of electrodes sandwiching the optical waveguide layer; anda driving circuit that applies a voltage to the pair of electrodes,wherein the first mirror, the second mirror, and the optical waveguide layer have respective structures extending in a same direction,wherein the first mirror has a higher light transmittance than the second mirror and allows part of the propagating light propagating through the optical waveguide layer to pass through and be emitted to outside of the optical waveguide layer as emission light,wherein the optical waveguide layer contains a liquid crystal material or an electrooptical material,wherein, when the voltage is not applied to the pair of electrodes ...

Подробнее
Номер записи: 2
02-01-2020 дата публикации

Mach-zehnder modulator

Номер: US20200004102A1
Автор: Masataka Watanabe, Naoya KONO
Принадлежит: Sumitomo Electric Industries Ltd

A Mach-Zehnder modulator includes: first and second resistive elements each having first and second contact areas, the first and second contact areas of the second resistive element being arranged in a direction of a first axis, the first and second contact areas of the second resistive element being arranged in a direction of a second axis; a common conductor connecting the first contact areas of the first and second resistive elements with each other; first and second waveguide structures each including a waveguide portion extending in a direction of a third axis intersecting the first and second axes; a first signal conductor connected to the waveguide portion of the first waveguide structure and the second contact area of the first resistive element; and a second signal conductor connected to the waveguide portion of the second waveguide structure and the second contact area of the second resistive element.

Подробнее
Номер записи: 3
02-01-2020 дата публикации

LIQUID LENS

Номер: US20200004104A1
Автор: PARK Seung Ryong
Принадлежит: LG INNOTEK CO., LTD.

A liquid lens includes a first plate including a cavity in which a conductive liquid and a non-conductive liquid are disposed; a first electrode placed under the first plate; a second electrode placed on the first plate; a second plate on the second electrode; and a third plate under the first electrode, wherein a region of the second plate, which is disposed on the conductive liquid, includes a first region having a first thickness and including an optical axis, and a second region extending from the first region and having a second thickness, and the first thickness is greater than the second thickness. 1. A liquid lens , comprising:a first plate comprising a cavity in which a conductive liquid and a non-conductive liquid are disposed;a first electrode disposed under the first plate;a second electrode disposed on the first plate;a second plate disposed on the second electrode; anda third plate disposed under the first electrode,wherein a region of the second plate, which is disposed on the conductive liquid, comprises a first region having a first thickness and encompassing an optical axis, and a second region extending from the first region and having a second thickness, andwherein the first thickness is larger than the second thickness.2. The liquid lens according to claim 1 , wherein the second plate further comprises a third region having a third thickness and coupled to the first plate claim 1 , andwherein the second region is disposed between the first region and the third region.3. The liquid lens according to claim 2 , wherein the third thickness is larger than the second thickness claim 2 , and is equal to or larger than the first thickness.4. The liquid lens according to claim 2 , wherein the third thickness is larger than the second thickness claim 2 , and is equal to or smaller than the first thickness.5. The liquid lens according to claim 1 , wherein a cross-sectional area of the cavity gradually increases in a direction from the third plate toward ...

Подробнее
Номер записи: 4
07-01-2021 дата публикации

PRISM-ENHANCED LENSES AND METHODS OF USING PRISM-ENHANCED LENSES

Номер: US20210003865A1
Автор: Milton Harry, Van Heugten Anthony
Принадлежит:

An electro-active lens is presented which utilizes a surface relief structures and an electro-active material, with a change in refractive index facilitating the change in optical properties. A molded structure and a liquid crystal are used to form a diffractive lens. In addition to the classical approach of utilizing diffractive optics and multiple Fresnel zones to form a lens, an additional structure is placed between Fresnel zones in order to improve the diffraction efficiency across the visible spectrum and reduce chromatic aberration. 1. An electro-active lens comprising:a first substrate;a second substrate;a liquid crystal material disposed between the first substrate and the second substrate; anda surface relief structure formed in the first substrate opposite the second substrate, the surface relief structure defining a diffractive lens having a plurality of phase wrap regions and at least one prism structure, disposed between a pair of phase wrap regions in the plurality of phase wrap regions, to mitigate diffraction efficiency reductions at wavelengths higher and lower than a design wavelength of the diffractive lens.2. The electro-active lens of claim 1 , wherein an mth phase wrap region in the plurality of phase wrap region is a distance of at least{'br': None, 'i': r', 'mfλ, 'sub': m', '0, '=√{square root over (2)},'}{'sub': '0', 'from a center of the diffractive lens, where m is an integer greater than 1, f is a focal length of the diffractive lens, and λis a design wavelength of the electro-active lens.'}3. The electro-active lens of claim 1 , wherein the at least one prism structure comprises m−1 prism structures having an aggregate width w and an inner radius of the mth phase wrap region in the plurality of phase wrap regions is equal to a sum of rand w.4. The electro-active lens of claim 1 , wherein the at least one prism structure comprises an annular prism structure concentric with the pair of phase wrap regions.5. The electro-active lens of ...

Подробнее
Номер записи: 5
07-01-2021 дата публикации

NEAR-EYE DISPLAYING METHOD CAPABLE OF MULTIPLE DEPTHS OF FIELD IMAGING

Номер: US20210003900A1
Автор: CHEN Tai-Kuo
Принадлежит: HES IP HOLDINGS, LLC

Disclosed are near-eye displaying methods and systems capable of multiple depths of field imaging. The method comprises two steps. At a first step, one or more pixels of a self-emissive display emit a light to a collimator such that the light passing through the collimator is collimated to form a collimated light. At a second step, the self-emissive display provides at least one collimated light direction altering unit on a path of the light from the collimator to change direction of the collimated light to enable the collimated light from at least two pixels to intersect and focus at a different location so as to vary a depth of field. 1. A near-eye displaying method capable of multiple depths of field imaging , characterized in that the method comprises the steps of:one or more pixels of a self-emissive display emitting a light to a collimator such that the light passing through the collimator is collimated to form a collimated light; andproviding at least one collimated light direction altering unit on a path of the light from the collimator to change direction of the collimated light to enable the collimated light from at least two pixels to intersect and focus at a different location so as to vary a depth of field.2. The near-eye displaying method capable of multiple depths of field imaging of claim 1 , characterized in that the self-emissive display comprises an active light source including an organic light-emitting diode claim 1 , a micro light emitting diode claim 1 , a quantum dot light emitter or a laser.3. The near-eye displaying method capable of multiple depths of field imaging of claim 1 , characterized in that the self-emissive display is a transparent display or a non-transparent display.4. The near-eye displaying method capable of multiple depths of field imaging of claim 1 , characterized in that the collimator is a microlens claim 1 , a flat metalens or a liquid crystal spatial light modulator.5. The near-eye displaying method capable of multiple ...

Подробнее
Номер записи: 6
07-01-2021 дата публикации

MULTIFOCAL SYSTEM USING ADAPTIVE LENSES

Номер: US20210003901A1
Автор: Lu Lu, WANG Junren, YAROSHCHUK Oleg
Принадлежит:

A device is provided. The device includes a first lens assembly controllable to switch between a first plurality of optical powers. The first lens assembly includes a plurality of directly optically coupled lenses. The device also includes a second lens assembly controllable to switch between a second plurality of optical powers that are the opposite of the first plurality of optical powers. The device further includes a half-wave plate disposed between the first adaptive lens assembly and the second adaptive lens assembly. 1. A device , comprising:a first lens assembly controllable to switch between a first plurality of optical powers, the first lens assembly comprising a plurality of directly optically coupled lenses;a second lens assembly controllable to switch between a second plurality of optical powers that are the opposite of the first plurality of optical powers; anda half-wave plate disposed between the first adaptive lens assembly and the second adaptive lens assembly.2. The device of claim 1 , wherein the half-wave plate is configured to convert a first light having a first polarization received from the first adaptive lens assembly to a second light having a second polarization orthogonal to the first polarization claim 1 , and output the second light toward the second adaptive lens assembly.3. The device of claim 1 , wherein at least one lens of the plurality of directly optically coupled lenses is switchable between a non-zero optical power state and a zero optical power state.4. The device of claim 3 , wherein the at least one lens is a circular polarization dependent active liquid crystal (“LC”) lens.5. The device of claim 1 , wherein the directly optically coupled lenses in the first lens assembly are first lenses claim 1 , and the second lens assembly comprises a plurality of directly optically coupled second lenses.6. The device of claim 5 , wherein:at least one first lens of the plurality of directly optically coupled first lenses is switchable ...

Подробнее
Номер записи: 7
03-01-2019 дата публикации

INFORMATION PROCESSING METHOD AND ELECTRONIC APPARATUS

Номер: US20190004392A1
Автор: DING Qicheng
Принадлежит:

An information processing method includes determining a type of a virtual scene displayed by a virtual electronic device, determining a target focus distance corresponding to the type of the virtual scene as determined, and configuring a refractive index of a lens of the virtual electronic device according to the target focus distance as determined. 1. An information processing method comprising:determining a type of a virtual scene displayed by a virtual electronic device;determining a target focus distance corresponding to the type of the virtual scene as determined; andconfiguring a refractive index of a lens of the virtual electronic device according to the target focus distance as determined.2. The method according to claim 1 , wherein the determining the target focus distance includes:determining a binocular focus distance based on the type of the virtual scene as determined;obtaining a monocular focus distance based on the binocular focus distance; and determining the monocular focus distance as the target focus distance.3. The method according to claim 2 , wherein the configuring the refractive index of the lens of the virtual electronic device includes:obtaining a target refractive index based on the monocular focus distance; andconfiguring the lens of the virtual electronic device to the target refractive index.4. The method according to claim 2 , wherein determining the binocular focus distance includes any one of the steps comprising:determining the binocular focus distance to be approximately 0.5 m in response to the type of the virtual scene being a text type;determining the binocular focus distance to be approximately 5 m in response to the type of the virtual scene being a television type;determining the binocular focus distance to be approximately 10 m in response to the type of the virtual scene being a movie type; anddetermining the binocular focus distance to be from approximately 0.5 m to approximately 20 m in response to the type of the virtual ...

Подробнее
Номер записи: 8
05-01-2017 дата публикации

Light Field Display Device and Method

Номер: US20170004750A1
Автор: Lapstun Paul
Принадлежит:

The present invention provides a light field display device () comprising an array of light field display elements () populating a display surface, each display element () comprising: a beam generator () for generating an output beam of light; a radiance modulator () for modulating the radiance of the beam over time; a focus modulator () for modulating the focus of the beam over time; and a scanner () for scanning the beam across a two-dimensional angular field. 1. A light field display device comprising an array of light field display elements populating a display surface , each display element comprising:(a) a beam generator for generating an output beam of light;(b) a radiance modulator for modulating the radiance of the beam over time;(c) a focus modulator for modulating the focus of the beam over time; and(d) a scanner for scanning the beam across a two-dimensional angular field.2. The device of claim 1 , wherein the beam generator comprises at least one light emitter selected from the group comprising: a laser; a laser diode; a light-emitting diode; a fluorescent lamp; and an incandescent lamp.3. The device of claim 1 , wherein the beam generator comprises multiple light emitters with different emission spectra claim 1 , the light emitters selected from the group comprising: a laser; a laser diode; a light-emitting diode; a fluorescent lamp; and an incandescent lamp.4. The device of claim 1 , wherein the radiance modulator is intrinsic to the beam generator.5. The device of claim 1 , wherein the radiance modulator is selected from the group comprising: an acousto-optic modulator; an absorptive electro-optic modulator; and a refractive electro-optic modulator.6. The device of claim 1 , wherein the focus modulator is selected from the group comprising: a liquid crystal lens; a liquid lens; a deformable membrane mirror; a deformable-membrane liquid-filled lens; an addressable lens stack; and an electro-optic lens.7. The device of claim 1 , wherein the scanner is ...

Подробнее
Номер записи: 9
07-01-2016 дата публикации

INTEGRATED OPTOELECTRONIC DEVICE COMPRISING A MACH-ZEHNDER MODULATOR AND A VERTICAL CAVITY SURFACE EMITTING LASER (VCSEL)

Номер: US20160006213A1
Автор: Su Chung-Yi
Принадлежит:

A Mach-Zehnder modulator (MZM) is horizontally integrated with a VCSEL. The horizontally-integrated MZM overcomes wavelength dependence problems of horizontally-integrated EA modulators and yet has the same advantages as horizontally-integrated EA modulators in terms of overcoming the ER and modulation range problems associated with the vertically-integrated EA and EO modulators. By overcoming these problems with the existing integrated modulators, the operation speed of the VCSEL is increased and the modulation signal range is extended to allow a wider range of modulation signals and modulation schemes, including large-signal digital modulation schemes. 1. An optoelectronic device comprising:a substrate;a first vertical cavity surface emitting laser (VCSEL) disposed on the substrate having a first distributed Bragg reflector (DBR) disposed above the substrate, a first quantum well (QW) region disposed above the first DBR, a second DBR disposed above the first QW region, and a first reflector disposed above the second DBR opposite the substrate, the first reflector reflecting light produced by the first VCSEL back into the optoelectronic device; anda Mach-Zehnder modulator (MZM) horizontally integrated into the optoelectronic device beside the first VCSEL, wherein the MZM receives light produced by the first VCSEL and modulates the received light to produce a modulated optical signal, wherein the MZM has a second reflector disposed in or on the MZM that prevents the light received from the first VCSEL from passing through a top surface of the MZM, wherein the first and second reflectors are different portions of a single reflector.23-. (canceled)4. The optoelectronic device of claim 1 , further comprising:an output cavity having a structure of a VCSEL, the output cavity being horizontally integrated into the optoelectronic device beside the MZM opposite the first VCSEL, the output cavity comprising a third DBR, a second QW region disposed above the third DBR, and a ...

Подробнее
Номер записи: 10
04-01-2018 дата публикации

Method And System For Waveguide Delay Based Equalization With Current And Optical Summing In Optical Communication

Номер: US20180006731A1
Автор: BALARDETA JOSEPH, Pang Simon
Принадлежит:

Methods and systems for waveguide delay based equalization with current and optical summing in optical communication are disclosed and may include an optoelectronic receiver including a directional coupler, two or more photodiodes, and one or more current mirrors. The optoelectronic receiver may be operable to: receive an input optical signal; split the input optical signal into first and second optical signals using the directional coupler; generate a first electrical from the first optical signal using a first photodiode; generate a second electrical signal from the second optical signal using a second photodiode; amplify the second electrical signal using the current mirror; and sum the first electrical signal with the amplified second electrical signal. The optoelectronic receiver may be operable to delay the first optical signal before generating the first electrical signal, using a waveguide delay. 1. A method for communication , the method comprising: receiving an input optical signal;', 'splitting the input optical signal into first and second optical signals using the directional coupler;', 'generating a first electrical signal from the first optical signal using a first photodiode;', 'generating a second electrical signal from the second optical signal using a second photodiode;', 'amplifying the second electrical signal using the current mirror; and', 'summing the first electrical signal with the amplified second electrical signal., 'in an optoelectronic receiver comprising a directional coupler, two or more photodiodes, and one or more current mirrors2. The method according to claim 1 , comprising delaying the first optical signal before generating the first electrical signal.3. The method according to claim 2 , comprising delaying the first optical signal using a waveguide delay.4. The method according to claim 1 , comprising generating an equalized output voltage by coupling the summed first electrical signal and amplified second electrical signal ...

Подробнее
Номер записи: 11
02-01-2020 дата публикации

LIQUID-LENS BASED OPTICAL STEERING SYSTEM FOR FREE-SPACE LASER COMMUNICATION

Номер: US20200007232A1
Автор: Cahoy Kerri, Clark James, do Vale Pereira Paula, Haughwout Christian
Принадлежит:

A beam steering system for a free-space laser communication system in a satellite includes a laser that emits a laser beam, a liquid lens assembly with at least one liquid lens to change the direction of the laser beam, and an amplifying optic to amplify the change in direction of the laser beam. The beam steering system may be used to steer a laser beam transmitted to another satellite or received from another satellite. In one example, a satellite may include two beam steering systems, disposed at opposing ends of a frame, where each steering system is configured to cover a hemisphere such that together, the steering systems can transmit and/or receive a laser beam over a 4π steradian sphere. The beam steering system may include a transmit feedback system and a reception system to monitor the direction and signal of the transmitted beam and the received beam, respectively. 1. A spacecraft , comprising:a first laser communication transmitter to transmit a first steered laser beam from the spacecraft, the first laser communication transmitter comprising a first plurality of liquid lenses to steer a first source laser beam to provide the first steered laser beam.2. The spacecraft of claim 1 , wherein the spacecraft does not include a gimbal or mechanical actuator to steer the first source laser beam so as to provide the first steered laser beam.3. The spacecraft of claim 1 , wherein the first plurality of liquid lenses steer the first source laser beam independently of a position and/or an orientation of the spacecraft claim 1 , such that no pointing of the spacecraft is required to steer the first source laser beam so as to provide the first steered laser beam.4. The spacecraft of claim 1 , wherein:the first source laser beam propagates along a first optical axis; andat least one liquid lens of the first plurality of liquid lenses is offset from the first optical axis.5. The spacecraft of claim 4 , wherein a focal length of the at least one liquid lens is adjusted ...

Подробнее
Номер записи: 12
14-01-2016 дата публикации

OPTICAL MODULE AND TRANSMITTING APPARATUS

Номер: US20160011486A1
Автор: SUGIYAMA Masaki
Принадлежит: FUJITSU OPTICAL COMPONENTS LIMITED

An optical module includes: an optical modulator that includes a plurality of electrodes and that performs an optical modulation process by using electrical signals input to the electrodes; and a flexible substrate that has flexibility and has a plurality of wiring patterns used for transferring the electrical signals each of which is input to a different one of the electrodes. The optical modulator includes: a plurality of connecting members that connect together the electrodes and the wiring patterns; and at least one protrusion that has a ground voltage, is connected to the flexible substrate while being positioned on a line segment connecting together two of the connecting members positioned adjacent to each other, and has a cross section of which the size measured in the direction perpendicular to the line segment is larger than the size of the cross section of each of the connecting members. 1. An optical module comprising:an optical modulator that includes a plurality of electrodes and that performs an optical modulation process by using electrical signals input to the plurality of electrodes; anda flexible substrate that has flexibility and has a plurality of wiring patterns used for transferring the electrical signals each of which is input to a different one of the plurality of electrodes, wherein a plurality of connecting members that connect together the plurality of electrodes and the plurality of wiring patterns; and', 'at least one protrusion that has a ground voltage, is connected to the flexible substrate while being positioned on a line segment connecting together two of the connecting members positioned adjacent to each other, and has a cross section of which a size measured in a direction perpendicular to the line segment is larger than a size of a cross section of each of the connecting members., 'the optical modulator includes2. The optical module according to claim 1 , whereinthe cross section of each of the connecting members is circular, ...

Подробнее
Номер записи: 13
14-01-2016 дата публикации

OPTICAL MODULE AND TRANSMITTING APPARATUS

Номер: US20160011487A1
Автор: SUGIYAMA Masaki
Принадлежит:

An optical module includes: an optical modulator that performs an optical modulation process by using electrical signals input from a plurality of terminals; and a flexible substrate that has flexibility and electrically connects the optical modulator and a predetermined connector to each other via a plurality of wiring patterns formed on first and second surfaces thereof. The flexible substrate includes: a first pad including a first conductor pattern connected, on the first surface, to a wiring pattern, a second conductor pattern formed on the second surface, and a through hole that connects the first conductor pattern and the second conductor pattern to each other; and a second pad including a third conductor pattern connected, on the second surface, to a wiring pattern, a fourth conductor pattern formed on the first surface, and a through hole that connects the third conductor pattern and the fourth conductor pattern to each other. 1. An optical module comprising:an optical modulator that performs an optical modulation process by using electrical signals input thereto from a plurality of terminals; anda flexible substrate that has flexibility and that electrically connects the optical modulator and a predetermined connector to each other via a plurality of wiring patterns formed on first and second surfaces thereof, wherein a plurality of joining units each of which is joined to a different one of a plurality of terminals of the optical modulator;', 'a first pad that is connectable to the connector and includes a first conductor pattern being connected, on the first surface, to a wiring pattern extending from a first joining unit among the plurality of joining units, a second conductor pattern being formed on the second surface in a position corresponding to a position of the first conductor pattern, and a through hole that connects the first conductor pattern and the second conductor pattern to each other; and', 'a second pad that is connectable to the ...

Подробнее
Номер записи: 14
14-01-2016 дата публикации

OPTICAL MODULE AND TRANSMITTING APPARATUS

Номер: US20160011488A1
Автор: Kubota Yoshinobu, SUGIYAMA Masaki
Принадлежит: FUJITSU OPTICAL COMPONENTS LIMITED

An optical module includes: a driver; an optical modulator; a connector that is electrically connected to either the driver or the optical modulator and is provided with an input/output terminal; and a flexible substrate that has flexibility, is connected to the connector, and transfers an electrical signal generated by the driver to the optical modulator, wherein in an end part connected to the connector, the flexible substrate has, on a first surface facing the input/output terminal, a signal-purpose wiring pattern used for transferring the electrical signal and a ground-purpose wiring pattern formed along the signal-purpose wiring pattern, and has, on a second surface that is different from the first surface, a ground electrode that partially covers the second surface and has a shorter electrical distance to the signal-purpose wiring pattern than an electrical distance between the signal-purpose wiring pattern and the ground-purpose wiring pattern. 1. An optical module comprising:a driver that generates an electrical signal;an optical modulator that performs an optical modulation process by using the electrical signal generated by the driver;a connector that is electrically connected to either the driver or the optical modulator and is provided with an input/output terminal for the electrical signal; anda flexible substrate that has flexibility, is connected to the connector, and transfers the electrical signal generated by the driver to the optical modulator, whereinin an end part connected to the connector, the flexible substrate has, on a first surface facing the input/output terminal, a signal-purpose wiring pattern used for transferring the electrical signal and a ground-purpose wiring pattern formed along the signal-purpose wiring pattern, and has, on a second surface that is different from the first surface, a ground electrode that partially covers the second surface and has a shorter electrical distance to the signal-purpose wiring pattern than an ...

Подробнее
Номер записи: 15
11-01-2018 дата публикации

Waveguide type optical element

Номер: US20180011348A1
Автор: Junichiro Ichikawa, Katsutoshi Kondou, Teppei YANAGAWA, Tetsuya Fujino
Принадлежит: SUMITOMO OSAKA CEMENT CO LTD

To effectively prevent the acceleration of the drift phenomenon generated by the application of a high electric field to a substrate through a bias electrode in a waveguide type optical element. A waveguide type optical element includes a substrate ( 100 ) having an electro-optic effect, two optical waveguides ( 104 and 106 ) disposed on a surface of the substrate, a non-conductive layer ( 120 ) which is disposed on the substrate and is made of a material having a lower dielectric constant than the substrate, and a control electrode ( 150 ) which is disposed on the non-conductive layer and is intended to generate a refractive index difference between the two optical waveguides by respectively applying electric fields to the two optical waveguides, and the non-conductive layer is constituted of a material which includes silicon oxide, an oxide of indium, and an oxide of titanium and has a ratio between a molar concentration of the titanium oxide and a molar concentration of indium oxide of 1.2 or more, and a voltage generating an electric field of 1 V/μm or more in the substrate is applied to the control electrode.

Подробнее
Номер записи: 16
14-01-2016 дата публикации

IMAGING APPARATUS HAVING LENS ELEMENT

Номер: US20160012268A1
Автор: Wang Ynjiun Paul
Принадлежит:

There is provided in one embodiment an imaging apparatus having a lens assembly. The lens assembly can comprises a lens element having a first light transmissive substrate and a second light transmissive substrate, the first light transmissive substrate including a first electrode, the second light transmissive substrate including a second electrode. The lens element can further comprise liquid crystal material intermediate the first light transmissive substrate and the second light transmissive substrate. 1. An apparatus comprising:an image sensor array having a plurality of rows of pixels and a global shutter operation in which each row of pixels has a common exposure start time and a common exposure termination time;a liquid crystal lens for focusing light onto the image sensor array, the liquid crystal lens having a far focus lens setting and near focus lens setting; and adjust the liquid crystal lens from the far focus lens setting to the near focus lens setting;', 'while adjusting the liquid crystal lens from the far focus lens setting to the near focus lens setting, capture, with the image sensor array in the global shutter operation, multiple frames of image data; and', 'while adjusting the liquid crystal lens from the far focus lens setting to the near focus lens setting, attempt to decode a decodable indicia in each captured frame of image data., 'wherein the apparatus is configured to2. The apparatus of claim 1 , wherein the apparatus is configured to cycle through focusing from the far focus lens setting to the near focus lens setting.3. The apparatus of claim 1 , wherein the apparatus is configured to cycle through focusing from the far focus lens setting to the near focus lens setting in an open loop manner.4. The apparatus of claim 1 , wherein the apparatus is configured to capture multiple frames of image data using an exposure period that is significantly less than a time period over which the apparatus adjusts the liquid crystal lens from the far ...

Подробнее
Номер записи: 17
14-01-2021 дата публикации

OPTICAL DEVICE THAT INCLUDES OPTICAL MODULATOR

Номер: US20210011352A1
Автор: SUGIYAMA Masaki
Принадлежит: FUJITSU OPTICAL COMPONENTS LIMITED

An optical device includes an optical modulator formed on an optical IC chip. A shape of the IC chip is a rectangle or a parallelogram. The optical modulator includes an interferometer, wiring patterns, a first polymer pattern, and a second polymer pattern. The interferometer includes an optical waveguide that is formed in a direction from a first edge to a second edge of the optical IC chip. The wiring patterns are formed parallel to the optical waveguide. The first polymer pattern is formed along the first edge or the second edge. The second polymer pattern is connected to the first polymer pattern and formed on the optical waveguide without overlapping the wiring patterns. 1. An optical device that includes an optical modulator formed on an optical IC (Integrated Circuit) chip shaped like a rectangle or a parallelogram , wherein an interferometer that includes an optical waveguide formed in a direction from a first edge to a second edge of the optical IC chip,', 'wiring patterns that are formed parallel to the optical waveguide,', 'a first polymer pattern that is formed along the first edge or the second edge, and', 'a second polymer pattern that is connected to the first polymer pattern and formed on the optical waveguide without overlapping the wiring patterns., 'the optical modulator comprises'}2. The optical device according to claim 1 , whereinan input terminal of the interferometer is configured in a vicinity of the first edge,an output terminal of the interferometer is configured in a vicinity of the second edge, andthe first polymer pattern is formed along the second edge.5. The optical device according to claim 1 , whereinan optical receiver is further formed on the optical IC chip. This application is based upon and claims the benefit of priority of the prior Japanese Patent Application No. 2019-129577, filed on Jul. 11, 2019, the entire contents of which are incorporated herein by reference.The embodiments discussed herein are related to an optical ...

Подробнее
Номер записи: 18
10-01-2019 дата публикации

Semiconductor optical modulator

Номер: US20190011800A1
Автор: Naoya KONO, Takehiko Kikuchi
Принадлежит: Sumitomo Electric Industries Ltd

A semiconductor optical modulator includes an input waveguide provided on a side of a substrate, a first and a second output waveguides provided on the same side of the substrate, a dividing portion optically connected to the input waveguide, eight arm waveguides optically connected to the dividing portion, a first multiplexing portion optically connecting four of the arm waveguides to the first output waveguide, a second multiplexing portion optically connecting the other four of the arm waveguides to the second output waveguide, and modulation electrodes provided on respective ones of the eight arm waveguides. The first and second output waveguides are arranged symmetrically about the input waveguide.

Подробнее
Номер записи: 19
09-01-2020 дата публикации

METHOD FOR FABRICATING MACH-ZEHNDER MODULATOR, MACH-ZEHNDER MODULATOR

Номер: US20200012164A1
Автор: Kitamura Takamitsu
Принадлежит: Sumitomo Electric Industries, Ltd.

A method for fabricating a Mach-Zehnder modulator includes: preparing a substrate product having a waveguide mesa, an embedding resin body and an inorganic insulator, the waveguide mesa being disposed on a supporting base, the inorganic insulator covering the embedding resin body to separate the embedding resin body from the waveguide mesa, the waveguide mesa having top and side faces covered with the inorganic insulator, and the embedding resin body embedding the side face of the waveguide mesa; forming an opening in the inorganic insulator by etching to form an inorganic insulating region, the opening reaching the top face of the waveguide mesa, the inorganic insulating region covering the embedding resin body and the side face of the inorganic insulator; and forming an ohmic electrode in the opening to make contact with the top face of the mesa, the inorganic insulating region separating the ohmic electrode from the embedding resin body. 1. A method for fabricating a Mach-Zehnder modulator comprising:preparing a substrate product including a waveguide mesa, an embedding resin body and an inorganic insulator, the waveguide mesa being disposed on a supporting base, the waveguide mesa having a top face and a side face, the inorganic insulator covering the embedding resin body and the top face and the side face of the waveguide mesa to separate the embedding resin body from the waveguide mesa, and the embedding resin body embedding the side face of the waveguide mesa;forming an opening in the inorganic insulator by etching to form an inorganic insulating region, the opening of the inorganic insulating region reaching the top face of the waveguide mesa, the inorganic insulating region covering the embedding resin body and the side face of the inorganic insulator; andforming an ohmic electrode in the opening of the inorganic insulating region, the inorganic insulating region separating the ohmic electrode from the embedding resin body, and the ohmic electrode making ...

Подробнее
Номер записи: 20
09-01-2020 дата публикации

Imaging device and contact lens

Номер: US20200012175A1
Автор: Jacob STRÖM, Lars Andersson, Matthew John LAWRENSON, Till BURKERT
Принадлежит: Telefonaktiebolaget LM Ericsson AB

An imaging device comprising a first camera with a controllable focus is provided. The imaging device is operative to detect that a user of the imaging device intends to capture an image of an object using the first camera, control the focus of the first camera to assume a target focal length, and capture the image. The target focal length is derived based on a measured accommodation of an eye lens of the user. Further, a contact lens comprising an eye-accommodation detector and a communications module is provided. The contact lens is operative to measure an accommodation of an eye lens to which the contact lens is attached, and transmit, to an imaging device comprising a first camera with a controllable focus, information pertaining to the measured accommodation of the eye lens and/or a focal length of the eye lens corresponding to the measured accommodation.

Подробнее
Номер записи: 21
14-01-2021 дата публикации

IMAGING SYSTEM AND METHOD FOR PRODUCING IMAGES USING MEANS FOR ADJUSTING OPTICAL FOCUS

Номер: US20210012531A1
Автор: Ollila Mikko
Принадлежит:

An imaging system for producing images for a display apparatus. Imaging system includes at least one imaging unit including camera, optical element including first optical portion and second optical portion having different focal lengths, and means for adjusting optical focus; means for generating depth or voxel map; and processor. Processor is configured to obtain gaze direction of user; determine optical depth of object present in region of interest within real-world scene; and control means for adjusting optical focus of imaging unit, based on optical depth of object and focal lengths of first and second optical portions, to capture warped image of real-world scene, the warped image having spatially-uniform angular resolution. 1. An imaging system for producing images for a display apparatus , the imaging system comprising: a camera;', 'an optical element that comprises at least a first optical portion and a second optical portion having different focal lengths; and', 'means for adjusting an optical focus of the given imaging unit;, 'at least one imaging unit, a given imaging unit comprisingmeans for generating a depth or voxel map of a given real-world scene; and obtain, from the display apparatus, information indicative of a gaze direction of a user;', 'determine, based on the gaze direction of the user and the depth or voxel map of the given real-world scene, an optical depth of at least one object present in a region of interest within the given real-world scene; and', 'control the means for adjusting the optical focus of the given imaging unit, based on the optical depth of the at least one object and the focal lengths of the first optical portion and the second optical portion, to capture at least one warped image of the given real-world scene, the at least one warped image having a spatially-uniform angular resolution., 'a processor communicably coupled to the at least one imaging unit and said means for generating, wherein the processor is configured to2. ...

Подробнее
Номер записи: 22
10-01-2019 дата публикации

QUANTUM COMMUNICATION COMPONENT, RECEIVER AND SYSTEM

Номер: US20190013878A1
Автор: LUCAMARINI Marco, PARAÏSO Taofiq, Shields Andrew James, YUAN Zhiliang
Принадлежит: KABUSHIKI KAISHA TOSHIBA

A component for a quantum communication system, the component comprising: 1. A component for a quantum communication system , the component comprising:an input section and a decoder section,the input section comprising n waveguides, where n is an integer of at least 2,the decoder section comprising m decoders, where m is an integer of at least 2, each decoder comprising at least one waveguide,the input section and the decoder section being provided on a single substrate such that the waveguides are continuous and integrated between the input section and the decoder section,the waveguides of the input section and the decoder section being arranged such that light pulses enter the waveguides of the decoder section via the waveguides of the input section and the m decoders operate in parallel.2. A component according to claim 1 , the component further comprising an output section claim 1 , the output section comprising p waveguides claim 1 , where p is an integer of at least 2 claim 1 , the output section and the decoder section being provided on a single substrate such that the waveguides are continuous and integrated between the output section and the decoder section.3. A component according to claim 2 , the component further comprising a router section claim 2 , the router section comprising q waveguides claim 2 , where q is an integer of at least 2 claim 2 , the router section and the input section being provided on a single substrate such that the waveguides are continuous and integrated between the outer section and the input section.4. A component according to claim 2 , wherein the substrate is a passive material.5. A component according to claim 2 , wherein the substrate is selected from Si claim 2 , SOI (silicon on insulator) claim 2 , SiN (silicon nitride) claim 2 , SiO2 (silicon dioxide) claim 2 , SiON (Silicon Oxynitride) claim 2 , glasses claim 2 , polymers claim 2 , diamond or silicon carbide.6. A component according to claim 2 , wherein at least one ...

Подробнее
Номер записи: 23
15-01-2015 дата публикации

OPTICAL SEMICONDUCTOR DEVICE

Номер: US20150016767A1
Автор: AKIYAMA Tomoyuki
Принадлежит:

An optical semiconductor device includes a laser oscillator on a semiconductor substrate; and an optical modulator on the semiconductor substrate. The laser oscillator includes a pair of reflecting mirrors at least one of which is a loop mirror, and the loop mirror includes a loop waveguide and a plurality of first ring resonators serially inserted in the loop waveguide. The optical modulator includes a plurality of second ring resonators connected in cascade along a modulator waveguide. A transmission band width of the first ring resonator is set greater than a transmission band width of the second ring resonator. 1. An optical semiconductor device comprising:a laser oscillator on a semiconductor substrate; andan optical modulator on the semiconductor substrate,wherein the laser oscillator includes a pair of reflecting mirrors at least one of which is a loop mirror, and the loop mirror includes a loop waveguide and a plurality of first ring resonators serially inserted in the loop waveguide,wherein the optical modulator includes a plurality of second ring resonators connected in cascade along a modulator waveguide,wherein a transmission band width of the first ring resonator is set greater than a transmission band width of the second ring resonator.2. The optical semiconductor device as claimed in claim 1 , wherein a gap width between the loop waveguide and the first ring resonator is set less than a gap width between the modulator waveguide and the second ring resonator.3. The optical semiconductor device as claimed in claim 1 , wherein the loop waveguide includes a first waveguide part configured to be optically coupled with the first ring resonator by a first width claim 1 , and a second waveguide part having a second width greater than the first width.4. The optical semiconductor device as claimed in claim 3 , wherein the loop waveguide further includes a third waveguide part configured to have a tapered shape and to connect the first waveguide part with the ...

Подробнее
Номер записи: 24
10-01-2019 дата публикации

OPTICAL MODULATOR WITH FPC, AND OPTICAL TRANSMISSION APPARATUS USING SAME

Номер: US20190014657A1
Автор: Miyazaki Norikazu, Sugamata Toru
Принадлежит: Sumitomo Osaka Cement Co., Ltd

To suppress peeling-off or cracks of a solder-fixing portion, which are caused by vibration during transportation or operation, in an optical modulator with FPC, thereby suppressing deterioration of radio-frequency characteristics of a signal path in an effective manner at low cost. 1. An optical modulator comprising:a flexible printed circuit that performs electrical connection with a circuit substrate,wherein the flexible printed circuit has a substantially quadrilateral shape,in the flexible printed circuit, a pad, which is electrically connected to the circuit substrate, is provided along one side of the substantial quadrilateral, and signal patterns, which are connected to signal lead pins for signal transmission which are provided in the optical modulator, are provided in another side opposite to the one side, andthe flexible printed circuit includes an additional fixing portion and/or a notched portion which are configured to increase a natural vibration frequency of the flexible printed circuit in a state of being connected to the signal lead pin and the circuit substrate.2. The optical modulator according to claim 1 ,wherein the additional fixing portion includes an additional pattern that is connected to an additional lead pin that is additionally provided in the optical modulator in addition to the signal lead pin.3. The optical modulator according to claim 2 ,wherein the additional pattern is configured to electrically connect a ground pattern provided in the flexible printed circuit and a housing of the optical modulator to each other.4. The optical modulator according to claim 2 ,wherein the additional fixing portions are configured with the additional patterns provided at respective sites between two sides excluding the one side and the other side of the substantial quadrilateral, and respective ends of an arrangement portion of the signal patterns, the number of the additional pattern provided at each of the sites being at least one.5. The optical ...

Подробнее
Номер записи: 25
14-01-2021 дата публикации

OPTICAL DEVICE

Номер: US20210014428A1
Автор: HYUN Jeeho, SHIN Gunshik, WOO Sungmin
Принадлежит: LG ELECTRONICS INC.

In order to effectively perform auto focusing and an OIS function, provided is an optical device in a first diopter state, the optical device comprising: a liquid lens having a variable diopter; a memory in which regions of interest (ROIs) according to the variable diopter are recorded; a lens control unit for retrieving a first ROI corresponding to the first diopter from the memory and configuring the first ROI; and a diopter operating unit for auto-focusing the first ROI to change the liquid lens to have a second diopter. 1. An optical device comprising:a liquid lens having a common electrode at one side and a plurality of individual electrodes at the other side;a diopter driving unit changing a diopter of the liquid lens by applying a current to the common electrode and the individual electrodes;an image sensor receiving light that has passed through the liquid lens and including a plurality of phase difference detection pixels; anda lens controller determining a region of interest (ROI of the image sensor in accordance with the diopter of the liquid lens and receiving a signal of the phase difference detection pixel corresponding to the determined ROI.2. The optical device of claim 1 , wherein the lens controller controls the diopter driving unit to change the diopter of the liquid lens to correspond to the signal of the received phase difference detection pixel.3. The optical device of claim 2 , further comprising a memory in which an ROI based on the diopter is recorded claim 2 , wherein the lens controller receives diopter information of the liquid lens and reads out the ROI corresponding to the received diopter from the memory and determines the ROI.4. The optical device of claim 3 , wherein the lens controller again reads out the ROI corresponding to the changed diopter to determine the ROI claim 3 , again receives the signal of the phase difference detection pixel corresponding to the determined ROI claim 3 , and controls the diopter driving unit to again ...

Подробнее
Номер записи: 26
19-01-2017 дата публикации

Optical modulator that includes optical waveguide formed in ferroelectric substrate

Номер: US20170017097A1
Автор: Masaharu Doi, Yoshihiko Yoshida, Yoshinobu Kubota, Yoshitada Kawashima
Принадлежит: Fujitsu Optical Components Ltd

An optical modulator includes: a ferroelectric substrate in which an input optical waveguide, first and second optical waveguides, and an output optical waveguide are formed; a first electrode formed in a vicinity of the first optical waveguide and to which a first DC voltage is applied; a second electrode formed in a vicinity of the second optical waveguide and to which a second DC voltage is applied; a third electrode electrically connected to the first electrode and formed on both sides of the second electrode; and a fourth electrode electrically connected to the second electrode and formed on both sides of the first electrode. A first gap between the first electrode and the fourth electrode is approximately the same as a second gap between the second electrode and the third electrode. A gap between the third electrode and the fourth electrode is 1-5 times greater than the first gap.

Подробнее
Номер записи: 27
19-01-2017 дата публикации

OPTICAL DEVICE AND TRANSMITTER

Номер: US20170017098A1
Автор: Maruyama Shinji, SUGIYAMA Masaki
Принадлежит: FUJITSU OPTICAL COMPONENTS LIMITED

An optical device includes an optical waveguide that includes an incident waveguide, parallel waveguides along an electrode, and emission waveguides, formed on a substrate having an electro-optical effect, a first emission waveguide among the emission waveguides is set as an output waveguide of signal light, for output to an external destination and a second emission waveguide among the emission waveguides is set as a monitoring optical waveguide for the signal light; a photodetector that is disposed over the monitoring optical waveguide; and a groove formed on a portion of the substrate, where the photodetector of the monitoring optical waveguide is disposed. The monitoring optical waveguide has a width that, as compared with the width at a starting point side, is formed to increase as the monitoring optical waveguide approaches the groove. 1. An optical device comprising:an optical waveguide that includes an incident waveguide, parallel waveguides along an electrode, and emission waveguides, formed on a substrate having an electro-optical effect, a first emission waveguide among the emission waveguides is set as an output waveguide of signal light, for output to an external destination and a second emission waveguide among the emission waveguides is set as a monitoring optical waveguide for the signal light;a photodetector disposed over the monitoring optical waveguide, where the photodetector directly overlies the monitoring optical waveguide; anda groove formed on a portion of the substrate, where the photodetector of the monitoring optical waveguide is disposed, whereinthe monitoring optical waveguide has a width that, as compared with the width at a starting point side, is formed to increase as the monitoring optical waveguide approaches the groove.2. The optical device according to claim 1 , wherein the monitoring optical waveguide includes:a first portion where, as compared with a width on the starting point side, the width of the optical waveguide is formed ...

Подробнее
Номер записи: 28
21-01-2016 дата публикации

EYEGLASS OF 3D GLASSES AND FABRICATION METHOD THEREOF, AND 3D GLASSES

Номер: US20160018672A1
Автор: WANG Junwei
Принадлежит:

An eyeglass of a 3D glasses, a fabrication method thereof and a 3D glasses are provided. The eyeglass of the 3D glasses comprises: a substrate (), configured to have a 3D function; and a lens () having a converging or diverging function, laminated on the substrate. The eyeglass of the 3D glasses and the 3D glasses have a myopic or hyperopic function simultaneously.

Подробнее
Номер записи: 29
18-01-2018 дата публикации

OPTICAL MODULATOR

Номер: US20180017839A1
Автор: HOSOKAWA Youichi, Katou Kei, Miyazaki Norikazu
Принадлежит: Sumitomo Osaka Cement Co., Ltd

Provided is an optical modulator in which even in a case where an optical waveguide and a control electrode are highly integrated, a distortion due to stress acting on the optical waveguide from lead-out wiring of a signal electrode is mitigated and occurrence of a temperature drift or the like is suppressed. An optical modulator includes: a substrate having an electro-optic effect; optical waveguides (L to L), each of which is formed on the substrate and provided with at least one Mach-Zehnder type optical waveguide; and a control electrode which controls light waves propagating through the optical waveguides, in which the control electrode is configured of signal electrodes (S and S) and ground electrodes (G to G), each of the signal electrodes being provided with a pad part (SP or SP) for input or output, which is electrically connected to an electric circuit which is provided outside the substrate, an interaction part (indicated by arrow R) which applies an electric field to the optical waveguide, and a lead-out wiring part which connects the pad part and the interaction part to each other, a portion of the lead-out wiring part is disposed parallel to an extended direction (a lateral direction in ) of the Mach-Zehnder type optical waveguide within a range (indicated by arrow R) in which two branching waveguides configuring the Mach-Zehnder type optical waveguide are present in the extended direction, and any one of a portion of the interaction part, another portion of the lead-out wiring part, and a stress relaxation structure of the ground electrode is formed at a position which is axially symmetrical to the portion of the lead-out wiring part with respect to a centrosymmetric axis in the extended direction of the Mach-Zehnder type optical waveguide. 1. An optical modulator comprising:a substrate having an electro-optic effect;an optical waveguide which is formed on the substrate and provided with at least one Mach-Zehnder type optical waveguide; anda control ...

Подробнее
Номер записи: 30
19-01-2017 дата публикации

Software configurable lighting device

Номер: US20170018214A1
Автор: An MAO, David P. Ramer, Hampton Boone MAHER, Jack C. Rains, Jr., Mark A. BLACK, Rashmi Kumar Raj, Ravi Kumar KOMANDURI
Принадлежит: ABL IP HOLDING LLC

The examples relate to various implementations of a software configurable lighting device, installed as a panel, that offers the capability to appear like and emulate a variety of different lighting devices. Emulation includes the appearance of the lighting device as installed in the wall or ceiling, possibly, both when lighting and when not lighting, as well as light output distribution, e.g. direction and/or beam shape.

Подробнее
Номер записи: 31
19-01-2017 дата публикации

ARRANGEMENTS FOR A SOFTWARE CONFIGURABLE LIGHTING DEVICE

Номер: US20170018215A1
Автор: Black Mark A., JR. Jack C., Komanduri Ravi Kumar, Lin Guan-Bo, Maher Hampton Boone, MAO An, Rains, RAJ Rashmi Kumar, Ramer David P.
Принадлежит:

The examples relate to various implementations of a single software configurable lighting device, installed as a panel, that offers the capability to appear like and emulate a variety of different lighting devices. Emulation includes the appearance of the lighting device as installed in the wall or ceiling, possibly both when lighting and when not lighting, as well as light output distribution, e.g. direction and/or beam shape. Specific examples in this case combine a display device with a spatial light modulator or use angled light sources in each pixel, possibly with a settable beam shaper associated with one or more of the emission pixels. 1. A lighting device , comprising:a matrix display;a display driver coupled to the matrix display, responsive to a first control input to drive the matrix to generate light representing an image;a controllable optic array coupled to the matrix display to optically process the image light output from the display to shape and/or redirect image light from the display;an optic driver coupled to the controllable optic array to drive a state of each pixel of the controllable optic array, responsive to a second control input;a memory;a processor having access to the memory and coupled to supply the first and second control inputs to the drivers; andprogramming in the memory, wherein execution of the programming by the processor configures the lighting device to perform functions including functions to:access an image selection and a general lighting distribution selection;present an image output, based on the image selection, via the matrix display visible through the controllable optical array; andemit light for general illumination having the selected general lighting distribution from at least a portion of the optic array.2. The lighting device of claim 1 , wherein execution of the programming by the processor further configures the lighting device to emit the light for general illumination having the selected general lighting ...

Подробнее
Номер записи: 32
17-01-2019 дата публикации

AN OPTICAL APPARATUS

Номер: US20190018262A1
Автор: NEJADMALAYERI Amir Hossein
Принадлежит: Phoelex LTD.

We disclose herein an optical apparatus comprising an optical signal path which is driven by a plurality of electrical drivers. The electrical drivers are configured to optimise delays between two adjacent electrical drivers. The delays are optimised such that power loss in the optical apparatus is reduced. 1. An apparatus comprising:a plurality of electrical drivers;at least one optical signal path comprising a plurality of sections, wherein at least one section comprises a plurality of sub-sections, wherein at least some of the plurality of sub-sections each comprises an optical modulating element, wherein at least some of the optical modulating elements each is coupled with at least one of said plurality of electrical drivers;wherein said each coupled electrical driver is configured to generate at least one electrical signal for modulating at least one of the propagation properties of an optical signal through said at least one optical signal path; andwherein the electrical drivers are configured such that the time delay difference between the electrical signals generated by at least two electrical drivers coupled with the optical modulating elements of respective sub-sections within said at least one section of said at least one optical signal path is smaller than or equal to seventy percent of the time-of-flight of an optical signal through said at least one section of said at least one optical signal path.2. An apparatus according to claim 1 , wherein the optical signal path further comprises at least one group comprising at least two of said plurality of sections; and/or optionally wherein the electrical circuit comprises an electrical network selected from a group comprising Daisy Chain network, Line network, Bus network, Tree network, and Star network; and/or', optionally wherein the number of electrical signal output ports is equal to or greater than the number of subsections each comprising an optical modulating element of the optical signal path; and/or ...

Подробнее
Номер записи: 33
21-01-2021 дата публикации

OPTICAL COHERENCE TOMOGRAPHIC IMAGER, OPTICAL COHERENCE TOMOGRAPHIC IMAGING METHOD, AND PROGRAM

Номер: US20210018312A1
Автор: Nakamura Shigeru
Принадлежит: NEC Corporation

An optical coherence tomographic imager for contributing reduction of the number of man-hours for evaluation to obtain a wavelength sweeping operation of continuous, linear, and monotonic change while utilizing a wavelength-tunable laser having a structure that is less susceptible to mechanical disturbance. The optical coherence tomographic imager includes a wavelength-tunable light source, a branching means, an irradiation means, a photoelectric conversion measuring means, and a processor. The wavelength-tunable light source outputs light whose wavelength is determined by a plurality of light source drive parameters. The branching means branches output light of the wavelength-tunable light source into object light and reference light. The irradiation means irradiates an object to be measured with the object light. The photoelectric conversion measuring means obtains interference light intensity measurement values by causing object light scattered from the object to be measured and the reference light to interfere with each other and to be guided to a light receiver. The processor reorders the interference light intensity measurement values based on the output light wavelengths. 1. An optical coherence tomographic imager , comprising:a wavelength-tunable light source whose output light wavelength is determined by a plurality of light source drive parameters;a branching part that branches output light of the wavelength-tunable light source into object light and reference light;an irradiation part that irradiates an object to be measured with the object light;a photoelectric conversion measuring part that obtains interference light intensity measurement values by causing object light scattered from the object to be measured and the reference light to interfere with each other and to be guided to a light receiver; anda processor configured to reorder the interference light intensity measurement values based on the output light wavelengths.2. The optical coherence ...

Подробнее
Номер записи: 34
16-01-2020 дата публикации

SWITCHING OF LIQUID CRYSTAL DEVICE

Номер: US20200018999A1
Автор: Haddock Joshua, Lee Shungneng, Reznikov Dmytro
Принадлежит:

An apparatus comprising a liquid crystal material and a controller are described herein. The liquid crystal material is disposed between a first electrode and a second electrode opposite the first electrode. Molecules of the liquid crystal material assume a first orientation during a first state of the liquid crystal material and a second orientation during a second state of the liquid crystal material. The first orientation is different from the second orientation. The controller is coupled to the first electrode and the second electrode to perform operations. The operations include applying a first periodic waveform to the first electrode and a second periodic waveform to the second electrode to generate a drive waveform applied across the liquid crystal material. The operations further include changing a duty cycle of the drive waveform over a first time period to transition the liquid crystal material between the first state and the second state. 1. An apparatus , comprising:a liquid crystal material disposed between a first electrode and a second electrode opposite the first electrode, wherein molecules of the liquid crystal material assume a first orientation during a first state of the liquid crystal material and a second orientation during a second state of the liquid crystal material, and wherein the first orientation is different than the second orientation; and applying a first periodic waveform to the first electrode and a second periodic waveform to the second electrode to generate a drive waveform applied across the liquid crystal material; and', 'changing a duty cycle of the drive waveform over a first time period to transition the liquid crystal material between the first state and the second state., 'a controller coupled to the first electrode and the second electrode, wherein the controller stores instructions that when executed by the controller causes the apparatus to perform operations including2. The apparatus of claim 1 , further comprising: ' ...

Подробнее
Номер записи: 35
21-01-2021 дата публикации

Optical Modulator

Номер: US20210018770A1
Автор: TAKAHASHI Masayuki, Tsuzuki Ken
Принадлежит:

An optical modulator is provided that is capable of preventing a short circuit at a step such as an annealing step in a manufacturing process, thereby improving the manufacturing yield. The optical modulator that is a Mach-Zehnder optical modulator, includes: an input optical coupler; a pair of first and second optical waveguides in parallel guiding an input light branched into two by the input optical coupler; and an output optical coupler coupling output lights of the first and second optical waveguides, wherein the two optical waveguides have semiconductor junctions formed at boundaries between two first polarity regions and a second polarity region formed between the two first polarity regions, each forming an optical phase modulation unit, the two first polarity regions are formed outside the first and second optical waveguides, the second polarity region is formed between the first and second optical waveguides, and the second polarity region is longer in region length in an optical waveguide direction than the first polarity region. 1. An optical modulator that is a Mach-Zehnder optical modulator , comprising: an input optical coupler; a pair of first and second optical waveguides in parallel guiding an input light branched into two by the input optical coupler; and an output optical coupler coupling output lights of the first and second optical waveguides , whereinthe first and second optical waveguides have semiconductor junctions formed at boundaries between two first polarity regions and a second polarity region formed between the two first polarity regions, each forming an optical phase modulation unit,the two first polarity regions are formed outside the first and second optical waveguides,the second polarity region is formed between the first and second optical waveguides, andthe second polarity region is longer in region length in an optical waveguide direction than the first polarity region.2. The optical modulator according to claim 1 , whereinthe ...

Подробнее
Номер записи: 36
21-01-2021 дата публикации

RADIO FREQUENCY PASSBAND SIGNAL GENERATION USING PHOTONICS

Номер: US20210018814A1
Автор: Chan Jacky Chak-Kee, Chou Jason Thomas, DeVore Peter Thomas Setsuda, Gowda Apurva Shantharaj, Perlmutter David Simon
Принадлежит:

Devices, methods and systems for generating wideband, high-fidelity arbitrary radio frequency (RF) passband signals are described. A voltage tunable optical filter for arbitrary RF passband signal generation includes a first input configured to receive a broadband optical pulse train, a second input configured to receive a first control voltage representative of an amplitude signal, an electrooptic modulator to receive the broadband optical pulse train and the first control voltage, to modulate the broadband optical pulse train in accordance with the amplitude signal, and to produce two complementary optical outputs that form two arms of an interferometer, an optical delay component to impart an optical path difference into one of the complementary outputs of the electrooptic modulator, and a combiner or a splitter to receive two complementary optical outputs of the electrooptic modulator after impartation of the optical path difference and to produce an output interference pattern of fringes. 1. A voltage tunable optical filter for use in a passband signal generator , comprising:a first input configured to receive a broadband optical pulse train;a second input configured to receive a first control voltage representative of an amplitude signal;an electrooptic modulator coupled to the first input and to the second input to receive the broadband optical pulse train and the first control voltage, and to modulate the broadband optical pulse train in accordance with the amplitude signal, electrooptical modulator configured to produce two complementary optical outputs that form two arms of an interferometer;an optical delay component coupled to the electrooptic modulator to impart an optical path difference into one of the complementary outputs of the electrooptic modulator; anda combiner or a splitter to receive two complementary optical outputs of the electrooptic modulator after impartation of the optical path difference and to produce an output interference pattern of ...

Подробнее
Номер записи: 37
17-01-2019 дата публикации

OPTICAL PHASE MODULATORS

Номер: US20190020419A1
Автор: Fiorentino Marco, Pelc Jason, Seyedi Ashkan
Принадлежит:

In one example, an apparatus includes e first beam splitter having a final output and a second output. A first optical waveguide is coupled to the first output, and a second optical waveguide is coupled to the second output. A first tunable phase delay is further coupled to the second optical waveguide and has a third output. A first set of phase modulators is coupled to the first optical waveguide, and a second set of phase modulators is coupled to the third output of the first tunable phase delay. At least one of the first set of phase modulators and the second set of phase modulators includes a phase modulator that is driven to three or more distinct phase states. A second beam splitter has a first input coupled to the first optical waveguide and a second input coupled to the second optical waveguide. 1. An apparatus , comprising:a first beam splitter having a first output and a second output;a first optical waveguide coupled to the first output;a first set of phase modulators coupled to the first optical waveguide;a second optical waveguide coupled to the second output;a first tunable phase delay coupled to the second optical waveguide and having a third output;a second set of phase modulators coupled to the third output of the first tunable phase delay; anda second beam splitter having a first input coupled to the first optical waveguide and a second input coupled to the second optical waveguide,wherein at least one of the first set of phase modulators and the second set of phase modulators includes a phase modulator that is driven to three or more distinct phase states.2. The apparatus of claim 1 , wherein the first set of phase modulators and the second set of phase modulators each comprise a plurality of overcoupled ring resonator modulators.3. The apparatus of claim 2 , wherein at least one of the first set of phase modulators and the second set of phase modulators includes a phase modulator that is fifty percent overcoupled.4. The apparatus of claim 1 , ...

Подробнее
Номер записи: 38
22-01-2015 дата публикации

METHOD FOR PRODUCING SEMICONDUCTOR OPTICAL DEVICE AND SEMICONDUCTOR OPTICAL DEVICE

Номер: US20150023627A1
Автор: Kimura Daisuke, Kitamura Takamitsu, YAGI Hideki
Принадлежит:

A method for producing a semiconductor optical device includes the steps of forming first and second optical waveguides; forming a first resin layer on the first and the second optical waveguides; forming an opening in the first resin layer; forming a first electrode in the opening; forming a second resin layer on the first electrode and the first resin layer; forming a groove in the second resin layer on the first electrode; forming a second electrode on the second resin layer, a side surface of the groove, and the top surface of the first electrode; and forming a third electrode on the second electrode. The second and third electrodes have a region in which the second and third electrodes pass over the second optical waveguide, and, in the region, the first and second resin layers are disposed between the second electrode and the second optical waveguide. 1. A method for producing a semiconductor optical device , comprising the steps offorming a first optical waveguide and a second optical waveguide on a principal surface of a substrate;forming a first resin layer on the principal surface of the substrate, on top surfaces of the first and the second waveguides, and on side surfaces of the first and second optical waveguides;forming an opening in the first resin layer on the first optical waveguide;forming a first electrode in a part of the opening, the first electrode being in contact with the top surface of the first optical waveguide through the opening;forming a second resin layer on the first electrode and on the first resin layer, the second resin layer filling the opening;forming a groove by etching the second resin layer until a top surface of the first electrode is exposed;forming a second electrode on the second resin layer, on a side surface of the groove, and on the top surface of the first electrode; andforming a third electrode on the second electrode,wherein the third electrode is configured to fill the groove,the second and third electrodes have a ...

Подробнее
Номер записи: 39
22-01-2015 дата публикации

METHOD FOR PRODUCING SPOT-SIZE CONVERTOR

Номер: US20150024527A1
Автор: Kitamura Takamitsu, Konishi Naoko, KONO Naoya, YAGI Hideki
Принадлежит:

A method for producing a spot-size convertor includes the steps of preparing a substrate; forming a stacked semiconductor layer including first and second core layers on the substrate; forming a mesa structure by etching the stacked semiconductor layer using a first mask, the mesa structure including a side surface and a bottom portion of the first core layer; forming a protective mask covering the side surface; etching the bottom portion using the protective mask to form a top mesa; and forming a bottom mesa by etching the second core layer using a second mask. The top mesa includes the first core layer and a portion having a mesa width gradually reduced in a first direction of a waveguide axis. The bottom mesa includes the second core layer and a portion having a mesa width gradually reduced in a second direction opposite to the first direction. 1. A method for producing a spot-size convertor , comprising the steps of:preparing a substrate having a principal surface including a first area and a second area;forming a stacked semiconductor layer on the principal surface of the substrate, the stacked semiconductor layer including a cladding layer, a first core layer, a core-separation layer, and a second core layer;forming a first mask on the stacked semiconductor layer;forming a mesa structure on the first area and the second area by etching the stacked semiconductor layer from an upper face of the stacked semiconductor layer to a middle of the first core layer using the first mask as an etching mask, the mesa structure including a side surface and a bottom portion of the first core layer, the mesa structure extending along a waveguide axis;forming a protective mask covering the side surface of the mesa structure;etching the bottom portion of the first core layer using the protective mask to form a top mesa until an upper surface of the core-separation layer is exposed;forming a second mask having a stripe-shaped pattern with a larger width than a mesa width of the ...

Подробнее
Номер записи: 40
28-01-2016 дата публикации

SEMICONDUCTOR OPTICAL DEVICE

Номер: US20160025922A1
Автор: Horino Kazuhiko, KONO Naoya
Принадлежит: Sumitomo Electric Industries, Ltd.

A semiconductor optical device including: a substrate including a first region and a second region; a first optical waveguide disposed on the first region, the first optical waveguide including a core layer and a cladding layer disposed on the core layer, the cladding layer including a first cladding region and a semiconductor layer disposed on the first cladding region, the first optical waveguide extending from an end facet of the semiconductor optical device to a boundary between the first region and the second region; a second optical waveguide disposed on the second region; and a region disposed on the cladding layer, the region having a lower refractive index than that of the first cladding region. The semiconductor layer has a higher refractive index than that of the first cladding region. The thickness of the core layer monotonically increases from the end facet toward the boundary. 1. A semiconductor optical device comprising:a substrate including a first region and a second region arranged in a first direction;a first optical waveguide disposed on the first region, the first optical waveguide including a core layer and a cladding layer disposed on the core layer, the cladding layer including a first cladding region and a semiconductor layer disposed on the first cladding region, the first optical waveguide extending in the first direction from an end facet of the semiconductor optical device to a boundary between the first region and the second region;a second optical waveguide disposed on the second region, the second optical waveguide being optically connected to the first optical waveguide at the boundary; anda region disposed on the cladding layer, the region having a lower refractive index than that of the first cladding region,wherein the semiconductor layer has a higher refractive index than that of the first cladding region,the core layer has a first thickness at a vicinity of the end facet of the semiconductor optical device and a second thickness ...

Подробнее
Номер записи: 41
26-01-2017 дата публикации

DIRECT-COUPLED DRIVER FOR MACH-ZEHNDER OPTICAL MODULATORS

Номер: US20170023805A1
Автор: POBANZ Carl
Принадлежит:

An optical modulator device directly-coupled to a driver circuit device. The optical modulator device can include a transmission line electrically coupled to an internal VDD, a first electrode electrically coupled to the transmission line, a second electrode electrically coupled to the first electrode and the transmission line. A wave guide can be operably coupled to the first and second electrodes, and a driver circuit device can be directly coupled to the transmission line and the first and second electrodes. This optical modulator and the driver circuit device can be configured without back termination. 1. An apparatus comprising:a driver circuit on a first chip including a driver power supply voltage (VDD); a transmission line electrically coupled to the VDD,', 'a first electrode electrically coupled to the transmission line,', 'a second electrode electrically coupled to the first electrode and the transmission line,', 'a wave guide operably coupled to the first and second electrodes; and, 'an optical modulator on a second chip including,'}an interface directly coupling the driver circuit and the transmission line, wherein the optical modulator and the driver circuit are configured without back termination.2. The apparatus of wherein the interface comprises a flip-chip application.3. The apparatus of wherein the interface comprises a bond wire.4. The apparatus of wherein the driver circuit comprises a driver op-amp circuit electrically coupled the transmission line claim 1 , and a bias loop circuit electrically coupled to the first and second electrodes and the driver op-amp circuit.5. The apparatus of wherein the bias loop circuit comprises a buffer op-amp claim 4 , a voltage source claim 4 , and a high impedance node claim 4 , wherein the buffer op-amp is electrically coupled to the voltage source and the high impedance node claim 4 , the high impedance node being electrically coupled to the driver op-amp circuit and the transmission line claim 4 , the voltage ...

Подробнее
Номер записи: 42
26-01-2017 дата публикации

Sub-volt drive 100 ghz bandwidth electro-optic modulator

Номер: US20170023842A1
Автор: Nadir Dagli
Принадлежит: UNIVERSITY OF CALIFORNIA

Electro-optical modulators and methods of fabrication are disclosed. An electro-optical modulator includes a Mach-Zehnder interferometer formed in a substrate removed semiconductor layer and a coplanar waveguide. Signals from the coplanar waveguide are capacitively coupled to the Mach-Zehnder interferometer through first and second dielectric layers.

Подробнее
Номер записи: 43
28-01-2016 дата публикации

MODULATOR AND PRODUCTION METHOD THEREOF

Номер: US20160026063A1
Автор: Kitamura Takamitsu, KOBAYASHI Hirohiko, KONO Naoya, YAGI Hideki
Принадлежит: Sumitomo Electric Industries, Ltd.

A modulator including: a Mach-Zehnder modulator that includes an optical waveguide disposed on a substrate, the optical waveguide including an electrode thereon; a resin layer disposed on the substrate, the resin layer embedding the optical waveguide, the resin layer having a groove arranged besides the optical waveguide; a termination resistor disposed on the substrate in the groove of the resin layer; and a first wiring disposed on the resin layer, the first wiring being connected to the termination resistor and the electrode of the optical waveguide. 1. A modulator comprising:a Mach-Zehnder modulator that includes an optical waveguide disposed on a substrate, the optical waveguide including an electrode thereon;a resin layer disposed on the substrate, the resin layer embedding the optical waveguide, the resin layer having a groove arranged besides the optical waveguide;a termination resistor disposed on the substrate in the groove of the resin layer; anda first wiring disposed on the resin layer, the first wiring being connected to the termination resistor and the electrode of the optical waveguide.2. The modulator according to claim 1 , wherein the wiring is extended from a top surface of the resin layer toward a bottom surface of the groove claim 1 , andthe first wiring is connected to the termination resistor.3. The modulator according to claim 1 , further comprising:a first insulating layer disposed on the substrate, the first insulating layer being sandwiched between the termination resistor and the substrate.4. The modulator according to claim 1 ,wherein the resin layer embeds the termination resistor.5. The modulator according to claim 1 , further comprising:a second wiring disposed on the resin layer,wherein the termination resistor has a first end and a second end opposite to the first end,the resin layer has a first inclined surface extending from a top surface of the resin layer toward a bottom surface of the groove and a second inclined surface ...

Подробнее
Номер записи: 44
28-01-2016 дата публикации

OPTICAL SEMICONDUCTOR DEVICE AND METHOD OF PRODUCING THE SAME

Номер: US20160026064A1
Автор: Kimura Daisuke, Kitamura Takamitsu, KOBAYASHI Hirohiko, KONO Naoya, MASUYAMA Ryuji, YAGI Hideki
Принадлежит: Sumitomo Electric Industries, Ltd.

An optical semiconductor device including: a substrate having a principal surface; a first and a second optical waveguides disposed on the principal surface of the substrate, the first and second optical waveguides extending in a first direction, the second optical waveguide being arranged adjacent to the first optical waveguide in a second direction intersecting with the first direction; a first and a second signal electrodes disposed on the first and second optical waveguides; a resistor disposed on the principal surface, the resistor being arranged between the first optical waveguide and the second optical waveguide, the resistor being electrically connected to the first signal electrode and the second signal electrode; a resin layer disposed on the principal surface, top surfaces of the first and second signal electrodes, and the resistor; and a capacitor disposed on the resin layer, the capacitor being electrically connected to the resistor through an opening of the resin layer. 1. An optical semiconductor device comprising:a substrate having a principal surface and a back surface opposite to the principal surface;a first optical waveguide disposed on the principal surface of the substrate, the first optical waveguide extending in a first direction;a second optical waveguide disposed on the principal surface of the substrate, the second optical waveguide extending in the first direction, the second optical waveguide being arranged adjacent to the first optical waveguide in a second direction intersecting with the first direction;a first signal electrode disposed on the first optical waveguide;a second signal electrode disposed on the second optical waveguide;a resistor disposed on the principal surface of the substrate, the resistor being arranged between the first optical waveguide and the second optical waveguide, the resistor being electrically connected to the first signal electrode and the second signal electrode;a resin layer disposed on the principal ...

Подробнее
Номер записи: 45
25-01-2018 дата публикации

Electro-optical single crystal-element, method for the preparation thereof, and systems employing the same

Номер: US20180024389A1
Автор: Pengdi Han, Welling Yan
Принадлежит: Individual

The present invention relates to an Electro-Optical (E-O) crystal elements, their applications and the processes for the preparation thereof More specifically, the present invention relates to the E-O crystal elements (which can be made from doped or un-doped PMN-PT, PIN-PMN-PT or PZN-PT ferroelectric crystals) showing super-high linear E-O coefficient γ c , e.g., transverse effective linear E-O coefficient γ T c , more than 1100 pm/V and longitudinal effective linear E-O coefficient γ l c up to 527 pm/V, which results in a very low half-wavelength voltage V l π below 200V and V T π below about 87V in a wide number of modulation, communication, laser, and industrial uses.

Подробнее
Номер записи: 46
25-01-2018 дата публикации

Optical modulator and method of manufacturing same

Номер: US20180024410A1
Автор: Junichi Fujikata, Mitsuru Takenaka, Shigeki Takahashi, Younghyun Kim
Принадлежит: PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION, University of Tokyo NUC

An optical phase modulator 100 according to an embodiment of this disclosure comprises a rib-type waveguide structure 110 comprising: a PN junction 106 comprising Si and formed in a lateral direction on a substrate; and a Si 1-x Ge x layer 108 that is doped with a p-type impurity and comprises at least one layer laminated on the PN junction 106, so as to be electrically connected to the PN junction 106.

Подробнее
Номер записи: 47
25-01-2018 дата публикации

FPC-ATTACHED OPTICAL MODULATOR AND OPTICAL TRANSMISSION DEVICE USING THE SAME

Номер: US20180024411A1
Автор: Miyazaki Norikazu, Sugamata Toru
Принадлежит: Sumitomo Osaka Cement Co., Ltd.

An optical modulator including a flexible printed circuit performing an electrical connection with an external circuit substrate, in which the flexible printed circuit includes a plurality of first pads and the like provided on one surface of the flexible printed circuit along one side of the flexible printed circuit, a plurality of second pads and the like provided on the other surface of the flexible printed circuit at locations that respectively correspond to the plurality of first pads, and a plurality of metal films and the like provided at locations that respectively correspond to the first pads on a side surface of the flexible printed circuit along the one side of the flexible printed circuit. 1. An optical modulator comprising:a flexible printed circuit performing an electrical connection with a circuit substrate, a plurality of first pads provided on one surface of the flexible printed circuit along one side of the flexible printed circuit,', 'a plurality of second pads provided on the other surface of the flexible printed circuit at locations that respectively correspond to the plurality of first pads, and', 'a plurality of metal films provided at locations that respectively correspond to the first pads on a side surface of the flexible printed circuit along the one side of the flexible printed circuit., 'wherein the flexible printed circuit includes'}2. The optical modulator according to claim 1 ,wherein each of the plurality of metal films is constituted of one metal film connecting one first pad of the plurality of first pads and one second pad of the plurality of second pads which correspond to each other, oreach of the plurality of metal films is constituted of a plurality of metal films including a metal film connected to the corresponding first pad and a metal film connected to the corresponding second pad.3. The optical modulator according to claim 1 ,wherein the flexible printed circuit includes through-holes or vias that thermally connect the ...

Подробнее
Номер записи: 48
10-02-2022 дата публикации

COUPLING MODULATED MICRO-RING RESONATOR MODULATOR

Номер: US20220043321A1
Автор: BAHADORI Meisam, Ma Yangjin, MISTRY Ajay, STRESHINSKY Matthew
Принадлежит:

An optical resonant modulator based on coupling modulation, comprising a resonant structure with an embedded Mach-Zehnder interferometer that is differentially driven to induced amplitude modulation at the output port. The principle of coupling modulation enables high data/baud rates to be achieved in a photonic integrated circuit, e.g. silicon, footprint that is considerably smaller than that of a conventional traveling-wave Mach-Zehnder modulator, in particular by utilizing space saving features, such as ring resonator phase shifters and bend waveguide arms. 1. An apparatus , comprising a first optical modulator comprising:a Mach-Zehnder optical modulator including a first optical coupler, a second optical coupler, a first optical waveguide, and a second optical waveguide, each of the first optical waveguide and the second optical waveguide connecting a corresponding optical output of the first optical coupler to a corresponding optical input of the second optical coupler; andan optical feedback waveguide connecting an optical output of the second optical coupler to an optical input of the first optical coupler; andwherein a physical length of the optical feedback waveguide is shorter than a physical length of each of the first optical waveguide and the second optical waveguide.2. The apparatus according to claim 1 , wherein the first optical waveguide comprises a first bent optical waveguide arm; and wherein the second optical waveguide comprises a second bent optical waveguide arm.3. The apparatus according to claim 2 , wherein the first bent optical waveguide arm includes a first optical waveguide section claim 2 , and a second optical waveguide section substantially parallel to the first section.4. The apparatus according to claim 3 , wherein the first bent optical waveguide arm includes a 180° bend between the first waveguide section and the second waveguide section.5. The apparatus according to claim 3 , further comprising a first phase shifter portion along ...

Подробнее
Номер записи: 49
24-01-2019 дата публикации

PRECISELY CONTROLLED CHIRPED DIODE LASER AND COHERENT LIDAR SYSTEM

Номер: US20190025431A1
Автор: Rakuljic George, Satyan Naresh
Принадлежит:

Frequency modulated lasers, LIDAR systems, and methods of controlling laser are disclosed. A laser source emits an optical beam having an optical frequency that changes in response to a signal applied to an input of the laser source. A laser driver that generates the signal applied to the input to cause the optical frequency to vary in accordance with a periodic frequency versus time function. The laser driver generates the signal for a current period of the periodic frequency versus time function based, at least in part, on optical frequency versus time measurements of one or more prior periods of the periodic frequency versus time function. 1. A frequency modulated laser , comprising:a laser source to emit an optical beam, wherein an optical frequency of the optical beam changes in response to at least one signal applied to at least one input of the laser source; anda laser driver that generates the at least one signal to cause the optical frequency to vary in accordance with a periodic frequency versus time function,wherein the laser driver generates the at least one signal for a current period of the periodic frequency versus time function based, at least in part, on optical frequency versus time measurements of one or more prior periods of the periodic frequency versus time function.2. The frequency modulated laser of claim 1 , whereinthe laser source is a semiconductor laser diode, andthe at least one signal is a drive current.3. The frequency modulated laser of claim 1 , wherein the periodic frequency versus time function is one of a linear triangular function and a linear sawtooth function.4. The frequency modulated laser of claim 1 , further comprising:an optical tap to extract a portion of the optical beam; andan optical frequency discriminator to make the optical frequency versus time measurements of the extracted portion of the optical beam.5. The frequency modulated laser of claim 4 , wherein the frequency discriminator is an asymmetric Mach-Zehnder ...

Подробнее
Номер записи: 50
24-01-2019 дата публикации

OPTICAL MODULATOR

Номер: US20190025615A1
Автор: Kawamura Yuriko, Kikuchi Kiyofumi, Tsuzuki Ken
Принадлежит:

The MZ type optical modulator of the invention includes: a Si optical modulator including an input optical waveguide, two arm waveguides branching and guiding light input from the input optical waveguide, an output optical waveguide combining the light guided through the two arm waveguides and outputting the combined light, two signal electrodes for applying radio frequency signals that are arranged in parallel to the two arm waveguides respectively, and a DC electrode for applying a bias voltage that is provided between the two signal electrodes; and at least one ground electrode arranged in parallel to the two signal electrodes. 1. An MZ type optical modulator comprising:a Si optical modulator including an input optical waveguide, two arm waveguides for branching and guiding light input from the input optical waveguide, an output optical waveguide for combining the light guided through the two arm waveguides and outputting the combined light, two signal electrodes for applying radio frequency signals that are arranged in parallel to the two arm waveguides respectively, and a DC electrode for applying a bias voltage that is provided between the two signal electrodes; andat least one ground electrode arranged in parallel to the two signal electrodes.2. The MZ type optical modulator according to claim 1 ,wherein the N Si optical modulators are arranged in parallel (N is an integer of two or more),the N+1 ground electrodes are arranged in parallel on both sides of the Si optical modulators, andthe ground electrode provided between the adjacent Si optical modulators is shared by the adjacent Si optical modulators.3. The MZ type optical modulator according to claim 1 ,wherein the radio frequency signals input to the two signal electrodes are a pair of differential signals,the at least two or more ground electrodes are arranged, andthe ground electrodes arranged on both sides of the Si optical modulators are connected to each other at a plurality of points by electrical ...

Подробнее
Номер записи: 51
29-01-2015 дата публикации

VARIABLE FOCAL LENGTH LENS

Номер: US20150029424A1
Автор: Gordon Michael S., Knickerbocker John U., LU MINHUA, Polastre Robert J.
Принадлежит:

An adjustable focal length lens structure comprising a first adjustable focal length lens. The first adjustable focal length lens comprises an inner surface of a first side having a first curvature. The first adjustable focal length lens also comprises a first transparent conducting electrode on the first side. The first adjustable focal length lens also comprises an inner surface of a second side having a second curvature. The first adjustable focal length lens also comprises a second transparent conducting electrode on the second side. The first adjustable focal length lens also comprises one or more layers of a first liquid crystal material disposed between the inner surface of the first side and the inner surface of the second side, wherein the first liquid crystal material has two or more effective indices of refraction. 1. An adjustable focal length lens structure , comprising: an inner surface of a first side having a first curvature;', 'a first transparent conducting electrode on the first side;', 'an inner surface of a second side having a second curvature;', 'a second transparent conducting electrode on the second side; and', 'one or more layers of a first liquid crystal material disposed between the inner surface of the first side and the inner surface of the second side, wherein the first liquid crystal material has two or more effective indices of refraction., 'a first adjustable focal length lens, comprising2. The adjustable focal length lens structure of claim 1 , wherein the first liquid crystal material comprises a cholesteric liquid crystal material.3. The adjustable focal length lens structure of claim 1 , wherein the first transparent conducting electrode is on the inner surface of the first side and the second transparent conducting electrode is on the inner surface of the second side.4. The adjustable focal length lens structure of claim 1 , wherein an effective index of refraction of the two or more effective indices of refraction of the first ...

Подробнее
Номер записи: 52
23-01-2020 дата публикации

LENS, LENS BLANK, AND EYEWEAR

Номер: US20200026098A1
Автор: HIKOSAKA Eiichiro, MURAMATSU Akihiro, OKADA Yoshinobu
Принадлежит:

A lens is provided with a lens body. The lens body is provided with a Fresnel lens part in which a plurality of protrusions and depressions that constitute at least parts of a plurality of concentric circles are formed. A diffracting part has a horizontally elongated outer shape when viewed in a direction in which light enters the lens body, and at least parts of first outer peripheral edges of the diffracting part located at both ends in a longitudinal direction form circular arcs that extend along concentric circles. Second outer peripheral edges of the diffracting part that are located at both ends in a lateral direction are located inward from a concentric circle that includes circular arcs formed by parts of the first outer peripheral edges, and are connected to parts of the first outer peripheral edges forming the circular arcs via bent portion. 1. A lens , comprising:a lens body; anda Fresnel lens portion provided in the lens body, the Fresnel lens portion being a portion in which a plurality of protrusions and depressions are formed, the plurality of protrusions and depressions forming at least a part of a plurality of concentric circles, wherein:the Fresnel lens portion as seen in a direction in which light enters the lens body has a laterally-elongated external shape,at least a part of first peripheral edges of the Fresnel lens portion forms a circular arc along one of the plurality of concentric circles, the first peripheral edges being positioned at both edges of the Fresnel lens portion in a longitudinal direction of the Fresnel lens portion, andsecond peripheral edges of the Fresnel lens portion are positioned inside the one of the plurality of concentric circles which includes the circular arc formed by the part of the first peripheral edges, the second peripheral edges being positioned at both edges of the Fresnel lens portion in a transverse direction of the Fresnel lens portion and being connected, via a bent portion, to the part of the first ...

Подробнее
Номер записи: 53
23-01-2020 дата публикации

IQ OPTICAL MODULATOR

Номер: US20200026145A1
Автор: Ogiso Yoshihiro, Ozaki Josuke, Ueda Yuta
Принадлежит:

An IQ optical modulator including: a parent Mach-Zehnder type (MZM) optical waveguide; child MZM optical waveguides constituting two arms of the parent MZM; two electrode transmission lines provided along the two arms of the child MZM, respectively, and receiving modulation signal to phase-modulate an optical signal; an RF extension line connected to the two electrode transmission lines, respectively; a first optical splitter branching light into the two arms of the parent MZM; a second optical splitter branching light into the two arms of the child MZM; and a first optical multiplexer multiplexing light from the two arms of the child MZM, wherein stripe direction of the child MZM optical waveguide is same as the RF extension line, the second optical splitter, and the first optical multiplexer, and is orthogonal to the first optical splitter. 1. An IQ optical modulator , comprising:a parent Mach-Zehnder type (MZM) optical waveguide functioning as a parent;child MZM optical waveguides functioning as a child that constitute two arms of the parent MZM optical waveguide;two electrode transmission lines that are provided along the two arms of the child MZM optical waveguides, respectively, and that receive a modulation signal to thereby phase-modulate an optical signal propagating in the child MZM optical waveguide;an RF extension line that is connected to the two electrode transmission lines, respectively, and that is used to input the modulation signal applied to the two electrode transmission lines;a first optical splitter for branching light into the two arms of the parent MZM optical waveguide;second optical splitters for branching light into the two arms of the child MZM optical waveguides; andfirst optical multiplexers for multiplexing light from the two arms of the child MZM optical waveguides,wherein:the child MZM optical waveguide including the two electrode transmission lines has a stripe direction that is the same as the stripe direction of the RF extension ...

Подробнее
Номер записи: 54
23-01-2020 дата публикации

OPTICAL MODULATION ELEMENT

Номер: US20200026146A1
Автор: FUJINO Tetsuya, Goto Tetsuya, MOTOYA Masayuki
Принадлежит:

In a waveguide-type optical modulation element that modulates light by applying radio frequency signals to an electrode, the realization of the additional broadening of the bandwidth by improving the degree of freedom in the design of the electrode is enabled. An optical modulation element, which includes optical waveguides provided in a substrate and electrodes that control light waves propagating through the optical waveguides and modulates light by propagating radio frequency signals to the electrodes, in which the electrodes include conductive layers made of copper or a copper alloy and protective layers made of a material other than copper and a copper alloy. 1. An optical modulation element comprising:an optical waveguide provided in a substrate; andan electrode that controls light waves propagating through the optical waveguide,the optical modulation element modulating light by propagating radio frequency signals to the electrode,wherein the electrode includesa conductive layer made of copper (Cu) or a copper alloy anda protective layer made of a material other than copper and the copper alloy.2. The optical modulation element according to claim 1 ,wherein at least a part of the protective layer is provided on the substrate, and the conductive layer is provided on the at least a part of the protective layer provided on the substrate.3. The optical modulation element according to claim 1 ,wherein at least a part of the protective layer is provided so as to cover a surface of the conductive layer.4. The optical modulation element according to claim 1 ,wherein one part of the protective layer is provided on the substrate, the conductive layer is provided on the one part of the protective layer, andan other part of the protective layer is provided so as to cover a surface of the conductive layer.5. The optical modulation element according to claim 1 ,wherein the protective layer is not provided on a region where the electrode is not provided among a region of a ...

Подробнее
Номер записи: 55
23-01-2020 дата публикации

OPTICAL WAVEGUIDE MODULATOR

Номер: US20200026147A1
Автор: Ma Yangjin, Rylyakov Alexander, Vera Villarroel Ariel Leonardo
Принадлежит:

A dual-differential optical modulator includes two optical waveguide arms, each including one or more phase modulating p/n junctions. The p/n junctions in each waveguide arm are electrically coupled between a same pair of single-ended transmission lines so as to be differentially push-pull modulated when the transmission line pair is connected to a differential driver. Either cathode or anode electrodes of the p/n junctions are AC coupled to the transmission lines and DC biased independently on the transmission line signals. 1. A modulator comprising:a first waveguide arm for guiding input light along a first path;a second waveguide arm for guiding input light along a second path;a first phase modulator (PM) formed in the first waveguide arm, the first PM comprising a first anode electrode and a first cathode electrode;a second phase modulator (PM) formed in the second waveguide arm, the second PM comprising a second anode electrode and a second cathode electrode;a first transmission line (TL) extending along the first waveguide arm and/or the second waveguide arm and electrically coupled to the first anode electrode and to the second cathode electrode; anda second transmission line (TL) extending along the first waveguide arm and/or the second waveguide arm and electrically coupled to the first cathode electrode and to the second anode electrode; anda driver configured to feed electrical drive signals into the first and second transmission lines.2. The modulator according to claim 1 , wherein the first waveguide arm and the second waveguide arm include electro-optic material; wherein the first PM comprises a p/n junction in the first waveguide; and wherein the second PM comprises a p/n junction in the second waveguide.3. The modulator according to claim 1 , wherein the first waveguide arm and the second waveguide arm include electro-optic material; wherein the first PM comprises a plurality of first p/n junctions in the first waveguide; and wherein the second PM ...

Подробнее
Номер записи: 56
29-01-2015 дата публикации

OPTICAL PULSE-GENERATOR AND OPTICAL PULSE-GENERATING METHOD

Номер: US20150029575A1
Автор: Hara Tokutaka, HOSOKAWA Youichi
Принадлежит:

Provided is an optical pulse-generator and an optical pulse-generating method which are capable of generating an optical pulse train with an arbitrary pattern. An optical pulse-generator includes a first optical modulator configured to modulate input light using a first modulation signal SIG to generate optical pulses, a second optical modulator configured to perform a modulation operation using a second modulation signal SIG synchronizing with the first modulation signal SIG and having a signal pattern that is set to output only specific part of the optical pulses, and a dispersion compensator configured to compensate a chirp of the optical pulse output from the first optical modulator 1. An optical pulse-generator comprising:a first optical modulator configured to modulate input light using a first modulation signal to generate optical pulses;a second optical modulator configured to perform a modulation operation using a second modulation signal synchronizing with the first modulation signal and having a signal pattern that is set to output only specific part of the optical pulses; anda dispersion compensator configured to compensate a chirp of the optical pulse output from the first optical modulator.2. The optical pulse-generator according to claim 1 , wherein at least one of the first optical modulator and the second optical modulator is an LN modulator.3. The optical pulse-generator according to claim 1 , wherein the dispersion compensator is disposed behind the first optical modulator and ahead of the second optical modulator.4. The optical pulse-generator according to claim 1 , further comprising:an optical pulse compressor configured to perform a soliton compression to an optical pulse output from a follower one of the second optical modulator and the dispersion compensator in an optical transmission direction.5. The optical pulse-generator according to claim 1 , further comprising:a phase adjuster configured to perform the timing synchronization between ...

Подробнее
Номер записи: 57
28-01-2021 дата публикации

OPTICAL MODULATOR AND OPTICAL TRANSMISSION DEVICE

Номер: US20210026217A1
Автор: Miyazaki Norikazu, Sugamata Toru
Принадлежит:

An optical modulator that can effectively dissipate heat generated from the inside includes: an optical modulation element which includes an optical ave aide and a radio frequency electrode for controlling light waves propagating through the optical waveguide; a termination resistor electrically connected to the radio frequency electrode; a termination resistor board on which the termination resistor is disposed; and a package case, which houses the optical modulation element and the termination resistor board, in which a plurality of protrusion portions are formed on one external surface of the package case, and at least one of the protrusion portions is formed at a position on the external surface of the package case, which faces a position inside the package case where the termination resistor board is disposed with the package case in between. 1. An optical modulator comprising:an optical modulation element which includes an optical waveguide and a radio frequency electrode for controlling light waves propagating through the optical waveguide;a termination resistor electrically connected to the radio frequency electrode;a termination resistor board on which the termination resistor is disposed; anda package case which houses the optical modulation element and the termination resistor board,wherein a plurality of protrusion portions are formed on one external surface of the package case, andat least one of the protrusion portions is formed at a position on the external surface of the package case, the position opposite to a position inside the package case where the termination resistor board is disposed with the package case in between.2. The optical modulator according to claim 1 , wherein at least one of the protrusion portions is formed at a position on the external surface of the package case claim 1 , the position opposite to a position of the termination resistor disposed on the termination resistor board inside the package case with the termination ...

Подробнее
Номер записи: 58
02-02-2017 дата публикации

PHOTONIC TRANSCEIVING DEVICE PACKAGE STRUCTURE

Номер: US20170031117A1
Автор: Kato Masaki, LI Peng-Chih, Nagarajan Radhakrishnan L.
Принадлежит:

The apparatus includes a case having a base member, two partial side members, and a lid member to provide a spatial volume with an opening at a back end of the base member. Additionally, the apparatus includes a PCB installed inside the spatial volume over the base member with a pluggable connector at the back end. The apparatus includes one or more optical transmitting devices in transmit-optical-sub-assembly package, each being mounted upside-down on the PCB and including a built-in TEC module in contact with the lid member and a laser output port aiming toward the back end. Furthermore, the apparatus includes a silicon photonics chip including a fiber-to-silicon attachment module, mounted on the PCB and coupled to a modulation driver module and a trans-impedance-amplifier module. Moreover, the apparatus includes an optical input port and output port being back connected to the fiber-to-silicon attachment module. 1. An apparatus for packaging a photonic transceiver comprising:a case, comprising a base member, two partial side members being connected by a joint piece and coupled to the base member, a lid member including a cover coupled to the two partial side members and the base member to provide a spatial volume with an opening at a back end of the base member;a PCB, installed inside the spatial volume over the base member, including a board body extended from a front edge to a back edge, the back edge being near the opening at an back end of the base member, the board body comprising an array of metallic pin stripes at the back edge to form a pluggable electrical interface connector;one or more optical transmitting devices, each being mounted upside-down on the PCB near the front edge and including a TEC module being in thermal contact with the lid member and a laser output port aiming toward the back edge;a silicon photonics chip, mounted on the PCB, including a fiber-to-silicon attachment module to couple with a first fiber from each of the laser output port; ...

Подробнее
Номер записи: 59
04-02-2016 дата публикации

Optical modulator

Номер: US20160033848A1
Автор: Junichiro Ichikawa, Katsutoshi Kondou, Toshio Kataoka
Принадлежит: SUMITOMO OSAKA CEMENT CO LTD

An aspect of the present invention is an optical modulator including a substrate, a plurality of optical waveguides, and a plurality of modulation electrodes provided on the substrate in order to modulate light propagating through the optical waveguides. The modulation electrodes include signal electrodes, to which modulation signals are supplied, and ground electrodes. The signal electrodes include first and second signal electrodes. The ground electrodes include a first ground electrode provided between the first and second signal electrodes, a second ground electrode provided on the opposite side of the first signal electrode from the first ground electrode adjacent to the first signal electrode, and a third ground electrode provided on the opposite side of the second signal electrode from the first ground electrode adjacent to the second signal electrode. A concave groove is formed in each of the first to third ground electrodes.

Подробнее
Номер записи: 60
01-02-2018 дата публикации

BEAM STEERING DEVICE AND OPTICAL APPARATUS INCLUDING THE SAME

Номер: US20180031680A1
Автор: CHOI Byounglyong, CHUNG Chilhee, HA Kyoungho, KIM Jungwoo, Lee Eunkyung, SHIN Dongjae
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

Beam steering devices and optical apparatuses including the beam steering devices are provided. A beam steering device includes a light source configured to generate input lights having first different wavelengths, a multiplexer configured to simultaneously receive the generated input lights, and multiplex the received input lights into a multiplexed light, and an optical splitter configured to split the multiplexed light. The beam steering device further includes an optical modulator configured to modulate the split light, and an emitter configured to simultaneously emit output lights having second different wavelengths to different points arranged in a first direction, based on the modulated light. 1. A beam steering device comprising:a light source configured to generate input lights having first different wavelengths;a multiplexer configured to simultaneously receive the generated input lights, and multiplex the received input lights into a multiplexed light;an optical splitter configured to split the multiplexed light;an optical modulator configured to modulate the split light; andan emitter configured to simultaneously emit output lights having second different wavelengths to different points arranged in a first direction, based on the modulated light.2. The beam steering device of claim 1 , wherein as the split light is further modulated claim 1 , the emitted output lights are moved in a second direction different from the first direction.3. The beam steering device of claim 2 , wherein the first direction is perpendicular to the second direction.4. The beam steering device of claim 2 , wherein either one or both of the emitter and the optical modulator comprises waveguides claim 2 ,the first direction is parallel to an extension direction of the waveguides, andthe second direction is perpendicular to the extension direction of the waveguides.5. The beam steering device of claim 1 , wherein either one or both of the emitter and the optical modulator comprises ...

Подробнее
Номер записи: 61
01-02-2018 дата публикации

SEMICONDUCTOR OPTICAL APPARATUS

Номер: US20180031764A1
Автор: Lealman Ian, Moodie David
Принадлежит:

A semiconductor optical apparatus is disclosed, wherein the semiconductor optical apparatus comprises a first waveguide region defining a first mode size and a second active waveguide region defining a second mode size being smaller than the first mode size. The second active waveguide region is optically coupled to the first waveguide region and the second active waveguide region comprises a lower multiple quantum well layer and an upper multiple quantum well layer located above the lower multiple quantum well layer. The lower multiple quantum well layer is physically separated from the upper multiple quantum well layer by a spacer layer. The upper multiple quantum well layer comprises a mode transformation region configured to reduce the size of an optical mode from the first mode size to the second mode size. 1. A semiconductor optical apparatus , comprising:a first waveguide region defining a first mode size; anda second active waveguide region defining a second mode size smaller than the first mode size, wherein the second active waveguide region is optically coupled to the first waveguide region and wherein the second active waveguide region comprises a lower multiple quantum well layer and an upper multiple quantum well layer located above the lower multiple quantum well layer,wherein the lower multiple quantum well layer is physically separated from the upper multiple quantum well layer by a spacer layer, andwherein the upper multiple quantum well layer comprises a mode transformation region configured to reduce a size of an optical mode from the first mode size to the second mode size.2. The semiconductor optical apparatus of claim 1 , wherein the first waveguide region is a first waveguide active region comprising a further multiple quantum well layer and wherein a modal index defined by the further multiple quantum well layer is substantially equal to a modal index defined by the lower multiple quantum well layer.3. The semiconductor optical apparatus of ...

Подробнее
Номер записи: 62
01-02-2018 дата публикации

OPTICAL MODULATOR THAT IS FORMED USING FERROELECTRIC SUBSTRATE

Номер: US20180031869A1
Автор: DOI Masaharu, Kubota Yoshinobu, Yoshida Yoshihiko
Принадлежит: FUJITSU OPTICAL COMPONENTS LIMITED

An optical modulator includes: a ferroelectric substrate in which an input optical waveguide, a pair of branched optical waveguides, and an output optical waveguide are formed; a signal electrode that is formed in a vicinity of at least one of the pair of branched optical waveguides; a first protection member that is attached to an input end of the ferroelectric substrate in which the input optical waveguide is formed; and a second protection member that is attached to an output end of the ferroelectric substrate in which the output optical waveguide is formed. The first protection member and the second protection member have a Mohs hardness that is less than or equal to a Mohs hardness of the ferroelectric substrate, and are formed of a glass material that does not have a pyroelectric effect. 1. An optical modulator comprising:a ferroelectric substrate in which an input optical waveguide, a pair of branched optical waveguides that are optically coupled to the input optical waveguide, and an output optical waveguide that is optically coupled to the pair of branched optical waveguides are formed;a signal electrode that is formed in a vicinity of at least one of the pair of branched optical waveguides;a first protection member that is attached to an input end of the ferroelectric substrate in which the input optical waveguide is formed; anda second protection member that is attached to an output end of the ferroelectric substrate in which the output optical waveguide is formed, whereinthe first protection member and the second protection member have a Mohs hardness that is less than or equal to a Mohs hardness of the ferroelectric substrate, and are formed of a glass material that does not have a pyroelectric effect.2. The optical modulator according to claim 1 , whereinthe glass material that forms the first protection member and the second protection member has an abrasion level of 600 or lower.3. The optical modulator according to claim 2 , whereinthe glass ...

Подробнее
Номер записи: 63
01-02-2018 дата публикации

Dither Free Bias Control

Номер: US20180031870A1
Автор: Griffin Robert, Heffner Brian L.
Принадлежит: OCLARO TECHNOLOGY LIMITED

A Mach-Zehnder modulator for modulating optical signals, and comprising: a plurality of modulating waveguide sections; at least one bias electrode in electrical communication with at least one modulating waveguide section and configured to apply at least one electrical bias signal to one or more of the modulating waveguide sections; and an output optical combiner comprising a plurality of inputs and a plurality of outputs, wherein the plurality of inputs of the combiner are in optical communication with output sides of the plurality of modulating waveguide sections, and wherein a plurality of the outputs of the combiner are monitor outputs. 1. A Mach-Zehnder , MZ , modulator for modulating optical signals , and comprising:a plurality of modulating waveguide sections;at least one bias electrode in electrical communication with at least one modulating waveguide section and configured to apply at least one electrical bias signal to one or more of the modulating waveguide sections; andan output optical combiner comprising a plurality of inputs and a plurality of outputs, wherein the plurality of inputs of the combiner are in optical communication with output sides of the plurality of modulating waveguide sections, and wherein a plurality of the outputs of the combiner are monitor outputs.2. The modulator according to claim 1 , further comprising a bias signal determiner configured to determine an error in the at least one electrical bias signal based on a signal received from the plurality of monitor outputs of the combiner.3. The modulator according to claim 2 , wherein the bias signal determiner is configured to determine the error based on a difference between two of the monitor outputs of the combiner.4. The modulator according to claim 1 , wherein the combiner is an n×n combiner and n is greater than 2.5. The modulator according to claim 4 , wherein the combiner is a 3×3 combiner claim 4 , and wherein one of the plurality of inputs of the 3×3 combiner is in optical ...

Подробнее
Номер записи: 64
01-02-2018 дата публикации

Electro-optic modulator, microwave photonic link including an electro-optic modulator, and method of communicating a signal with an electro-optic modulator

Номер: US20180031946A1
Автор: Arash HOSSEINZADEH, Christopher T. Middlebrook
Принадлежит: MICHIGAN TECHNOLOGICAL UNIVERSITY

An electro-optic modulator coupled to an optical source providing an optical power and a radio frequency source providing a radio frequency power. The electro-optic modulator includes a waveguide to receive the optical power, a first ring resonator modulator, and a second ring resonator modulator. The first ring resonator modulator and the second ring resonator modulator receives the radio frequency power, and are coupled to the waveguide for modulating the optical power with the radio frequency power. The first ring resonator modulator and the second ring resonator modulator, with the waveguide, substantially suppress third order intermodulation distortion of a combined power. Also disclosed are a microwave photonic link having the electro-optic modulator and a method of communicating a signal with the electro-optic modulator.

Подробнее
Номер записи: 65
05-02-2015 дата публикации

PIEZOELECTRIC ELEMENT AND METHOD OF PRODUCING THE SAME

Номер: US20150036200A1
Автор: AKAI Daisuke, ISHIDA Makoto, Matsushita Noriyuki, Wado Hiroyuki
Принадлежит:

A piezoelectric element includes a substrate having a first surface with a predetermined orientation; a lower electrode layered on the first surface of the substrate; a piezoelectric thin film layered on the lower electrode and having a piezoelectric body; and an upper electrode layered on the piezoelectric thin film. A voltage is to be impressed between the lower electrode and the upper electrode to deform the piezoelectric thin film. The piezoelectric thin film is epitaxially grown on the lower electrode using a physical vapor deposition or a chemical vapor deposition. 1. A piezoelectric element comprising:a substrate having a first surface with a predetermined orientation;a lower electrode layered on the first surface of the substrate;a piezoelectric thin film layered on the lower electrode and having a piezoelectric body; andan upper electrode layered on the piezoelectric thin film, the piezoelectric thin film being deformed by impressing voltage between the lower electrode and the upper electrode, whereinthe piezoelectric thin film is epitaxially grown on the lower electrode using a physical vapor deposition or a chemical vapor deposition.2. The piezoelectric element according to claim 1 , wherein a base member comprising a single crystal of Si, and', {'sub': 2', '3, 'a buffer layer comprising a single crystal of γ-AlOformed on the base member as a film,'}], 'the substrate has'}the lower electrode is formed on the buffer layer as a film of a single crystal, andthe piezoelectric thin film includes a lead zirconate titanate as a main component of the piezoelectric body.3. The piezoelectric element according to claim 2 , whereinthe base member has an interface adjacent to the buffer layer,the piezoelectric thin film has an interface adjacent to the upper electrode,the interface of the base member has an orientation of (001),the first surface of the substrate has an orientation of (001) by forming the buffer layer using a physical vapor deposition or a chemical ...

Подробнее
Номер записи: 66
02-02-2017 дата публикации

PHOTONIC VECTOR SIGNAL GENERATION WITHOUT PRECODING

Номер: US20170033872A1
Автор: LI Xinying, Wang Yuanquan, Yu Jianjun
Принадлежит:

A novel and simple photonic vector signal generation scheme at radio frequency (RF) bands enabled by a single-drive Mach-Zehnder modulator (MZM)-based optical carrier suppression (OCS) without precoding techniques and optical filter, which can reduce the complexity of transmitter digital signal processing (DSP), is described. The generation and reception of 16/20/22-Gbaud quadrature-phase-shift-keying (QPSK) vector signals at 16/20/22 GHz are experimentally demonstrated, respectively. The measured bit-error ratio for 16 G-baud QPSK vector signals after transmitting over 10-km standard single mode fiber (SSMF) can be under 7% hard-decision forward-error-correction (HD-FEC) threshold of 3.8×10. Moreover, compared to the conventional precoding scheme, the receiver sensitivity can be enhanced by 4 dB at both back-to-back (BTB) and after 10-km SSMF transmission cases, which demonstrates the feasibility of this technique, and show its potential promising application in radio over fiber (RoF) system. 1. A method of optical communication , implemented at a transmitter in an optical communication network , comprising:receiving information bits;modulating the information bits using a first modulation scheme to generate a modulated intermediate signal at a first frequency;generating a combined signal by adding an unmodulated carrier having a second frequency to the modulated intermediate signal; anddriving a single electro-optical modulator by the combined signal to produce a vector signal for transmission of the information bits.2. The method of claim 1 , wherein the electro-optical modulator is of a Mach-Zehnder modulator (MZM) type.3. The method of claim 1 , wherein the electro-optical modulator is an external electro-optical modulator.4. The method of claim 1 , wherein the first modulation scheme uses a quadrature amplitude modulation (QAM) constellation of size four or higher.5. The method of claim 1 , wherein the combined signal is generated without precoding amplitudes ...

Подробнее
Номер записи: 67
05-02-2015 дата публикации

LIGHT SOURCE CIRCUIT AND LIGHT SOURCE DEVICE EQUIPPED WITH SAME

Номер: US20150036964A1
Автор: HATORI Nobuaki, ISHIZAKA Masashige, MORI Masahiko, Okano Makoto, SHIMIZU Takanori
Принадлежит:

A light source circuit transmits light incident from a semiconductor laser source to a plurality of optical devices. At least one optical branch section is formed to branch one input-side optical waveguide at least into a first output-side optical waveguide terminal and a second output-side optical waveguide terminal. A light path length (L1) between the optical branch section and a next-stage optical branch section or the optical device is connected to the first output-side optical waveguide extending from the optical branch section and a light path length (L2) between the optical branch section and the next-stage optical branch section selected such that the absolute value of a difference between (L1) and (L2) is (¼+i/2) times (i is zero or a positive integer) the wavelength of the light transmitted through the light source circuit. 1. A light source circuit in which at least one optical branch section for branching one input side optical waveguide into at least a first output side optical waveguide and a second output side optical waveguide is formed on a substrate , and light incident from a semiconductor laser light source is transmitted to a plurality of optical devices ,{'sub': 1', '2', '1', '2, 'wherein a light path length Lof an optical waveguide between the optical branch section and a next-stage optical branch section or an optical device which is connected to the first output side optical waveguide extending from the optical branch section, and a light path length Lof an optical waveguide between the optical branch section and a next-stage optical branch section or an optical device which is connected to the second output side optical waveguide are selected such that an absolute value of a difference between the light path length Land the light path length Lis (¼+i/2) times (i is 0 or a positive integer) a wavelength of the light propagated through the light source circuit.'}2. A light source circuit in which at least one optical branch section for ...

Подробнее
Номер записи: 68
05-02-2015 дата публикации

MACH-ZEHNDER OPTICAL MODULATOR WITH EMBEDDED ACTIVE ELEMENTS

Номер: US20150036965A1
Автор: HAGLEY Andre, Prosyk Kelvin
Принадлежит: TERAXION INC.

A Mach-Zehnder optical modulator is provide and has a travelling wave electrode extending over two optical waveguide branches and modulating the relative phase of the optical beam components propagating in those branches. The travelling wave electrode has transmission line conductors and pairs of waveguide electrodes, the waveguide electrodes of each pair being coupled to one of the optical waveguide branches, respectively. The travelling wave electrode further includes active devices having a high impedance input electrically connected to one of the transmission line conductors and a low impedance output electrically connected to one of the waveguide electrodes. Each active device transfers the electrical modulation signal from the associated transmission line conductor onto the associated waveguide electrode according to a voltage transfer function. 1. A Mach-Zehnder optical modulator for modulating an input optical beam according to an electrical modulation signal , the Mach-Zehnder modulator comprising an optical structure dividing the input optical beam into two optical beam components propagating in two parallel optical waveguide branches , respectively , and recombining said optical beam components downstream the optical waveguide branches , the Mach-Zehnder modulator further comprising:a travelling wave electrode extending over the optical waveguide branches and modulating a relative phase of the optical beam components, said travelling wave electrode comprising:transmission line conductors conveying the electrical modulation signal;a plurality of pairs of waveguide electrodes, the waveguide electrodes of each pair being coupled to one of the optical waveguide branches, respectively; anda plurality of active devices each having an input electrically connected to one of the transmission line conductors and an output electrically connected to one of the waveguide electrodes, the input having a higher impedance than the output, each active device transferring ...

Подробнее
Номер записи: 69
31-01-2019 дата публикации

OPTICAL SCANNING DEVICE THAT INCLUDES MIRRORS AND OPTICAL WAVEGUIDE REGION

Номер: US20190033574A1
Автор: HASHIYA AKIRA, HIRASAWA TAKU, INADA YASUHISA
Принадлежит:

An optical scanning device includes: a first mirror; a second mirror; two non-waveguide regions; an optical waveguide region; and a first adjusting element. The optical waveguide region propagates light. The optical waveguide region and the two non-waveguide regions include respective first regions in which a common material exists. The optical waveguide region or each of the two non-waveguide regions further includes a second region in which a first material having a refractive index different from a refractive index of the common material exists. The first mirror allows part of the light propagating through the optical waveguide region to be emitted through the first mirror. The first adjusting element changes at least either the average refractive index of the optical waveguide region or a thickness of the optical waveguide region to change a direction of the light emitted through the first mirror. 1. An optical scanning device comprising:a first mirror that has a first reflecting surface;a second mirror that has a second reflecting surface, and that faces the first mirror;two non-waveguide regions that are disposed between the first and second mirrors and that are spaced apart from each other in a first direction parallel to at least either the first reflecting surface or the second reflecting surface;an optical waveguide region that is disposed between the first and second mirrors and that is sandwiched between the two non-waveguide regions, the optical waveguide region having a higher average refractive index than an average refractive index of each of the non-waveguide regions; anda first adjusting element that changes at least either the average refractive index of the optical waveguide region or a thickness of the optical waveguide region,wherein the optical waveguide region propagates light in a second direction that is parallel to at least either the first reflecting surface or the second reflecting surface and that crosses the first direction,wherein the ...

Подробнее
Номер записи: 70
31-01-2019 дата публикации

HIGH-RATE HIGH-SWING DRIVE CIRCUIT APPLIED TO SILICON PHOTONIC MODULATOR

Номер: US20190033629A1
Автор: Zhang David, Zhao Lei, ZHU Wenrui
Принадлежит: Huawei Technologies Co., Ltd.

A high-rate high-swing drive circuit applied to a silicon photonic modulator is disclosed. The drive circuit is connected to a drive pre-stage circuit and a modulator load. The drive circuit includes at least one output circuit, and the output circuit includes: a first inverter, a first voltage bias module, a second inverter, a second voltage bias module, and an inductor. The drive circuit formed by using such a circuit connection increases an output swing of a drive while ensuring a high rate. 1. A high-rate high-swing drive circuit applied to a silicon photonic modulator , wherein the drive circuit is connected to a drive pre-stage circuit and a modulator load , the drive circuit comprises at least one output circuit , and the output circuit comprises: an input end of the first inverter is connected to an output end of the drive pre-stage circuit;', 'an output end of the first inverter is connected to an input end of the first voltage bias circuit;', 'an output end of the first voltage bias circuit is connected to an input end of the second inverter;', 'an output end of the second inverter is connected to an input end of the second voltage bias circuit;', 'an output end of the second voltage bias circuit is connected to an input end of the inductor; and', 'an output end of the inductor is connected to an input end of the modulator load., 'a first inverter, a first voltage bias circuit, a second inverter, a second voltage bias circuit, and an inductor;'}2. The drive circuit according to claim 1 , wherein the first inverter comprises a core P-type metal-oxide semiconductor field-effect transistor (PMOS) and a core N-type metal-oxide semiconductor field-effect transistor (NMOS) claim 1 , whereina gate electrode of the core PMOS is connected to the output end of the drive pre-stage circuit and a gate electrode of the core NMOS;a drain electrode of the core PMOS is connected to a drain electrode of the core NMOS and the input end of the first voltage bias circuit;a ...

Подробнее
Номер записи: 71
04-02-2016 дата публикации

Liquid crystal lens imaging method and apparatus

Номер: US20160037024A1
Автор: Chunhui Cui, Mao Ye, Rui BAO, Shuda YU
Принадлежит: Shenzhen Mercury Optoelectronics Research Institute

The present invention provides a liquid crystal lens imaging apparatus and method. Wherein, the imaging apparatus comprises a lens group including at least a liquid crystal lens, a drive circuit, an image collecting unit and an image processing unit. The drive circuit is connected to the liquid crystal lens to drive the liquid crystal lens respectively into an in-focus state or into an out-of-focus state. The image collecting unit is configured to collect light signal passing through the liquid crystal lens to generate an image. When the liquid crystal lens is in the in-focus state, the image collecting unit generates an in-focus image of the light signal and, when the liquid crystal lens is in the out-of-focus state, the image collecting unit generates an out-of-focus image of the light signal as a reference image. Further, the image processing unit is connected to the image collecting unit to receive both the in-focus image and the reference image, to process the in-focus image using the reference image to generate a processed image, and to deconvolute the processed image to generate a final image.

Подробнее
Номер записи: 72
30-01-2020 дата публикации

OPTICAL MODULATION DEVICE AND METHOD FOR CONTROLLING OPTICAL MODULATION DEVICE

Номер: US20200033691A1
Автор: ENOKI Kentaro, Shimakura Yasuhisa, YAGYU Eiji, Yoshida Tsuyoshi
Принадлежит: Mitsubishi Electric Corporation

A superposition circuitry superposes a dither signal on a reference DC bias voltage and outputs a resultant voltage as a bias voltage to an MZ modulator, during control of a driving voltage amplitude. During the control of the driving voltage amplitude to the MZ modulator, an amplitude setter determines, by varying the amplitude of an output voltage from an amplifier, a plurality of amplitudes of output curves from a synchronous detector, each of which is obtained by varying the reference DC bias voltage output from a bias controller, and the amplitude setter sets the amplification factor of the amplifier, based on an amplitude of the output voltage from the amplifier that corresponds to an amplitude satisfying a predetermined condition, out of the plurality of the amplitudes of the output curves from the synchronous detector. 1. An optical modulation device comprising:an MZ modulator for modulating light output continuously from a light source, based on a driving voltage and a bias voltage, to generate a light signal;a splitter for splitting the light signal;a photodiode for converting a light signal output from the splitter into an electrical signal;a log detector for detecting a difference between a local maximum value and a local minimum value of the signal output from the photodiode;a dither-signal generator for generating a dither signal during control of a driving voltage amplitude;a synchronous detector for performing synchronous detection by multiplying an output signal from the log detector by the dither signal;a bias controller for outputting a reference DC bias voltage;a superposition circuitry for superposing the dither signal on the reference DC bias voltage and outputting a resultant voltage as the bias voltage during the control of the driving voltage amplitude and for outputting the reference DC bias voltage as the bias voltage during other operations than the control of the driving voltage amplitude;a data-signal generator for generating a data ...

Подробнее
Номер записи: 73
30-01-2020 дата публикации

OPTICAL WAVEGUIDE DEVICE

Номер: US20200033692A1
Автор: Katou Kei, Miyazaki Norikazu
Принадлежит:

An optical waveguide device includes a substrate on which an optical waveguide is formed, and an object that is disposed on the substrate. The optical waveguide includes a mode conversion/branching portion that converts a mode of a light wave propagating through the optical waveguide and branches the light wave, and the object is disposed to cover a part or the whole of the mode conversion/branching portion or not to cover the mode conversion/branching portion when the substrate is viewed in a plan view. In a case where the object is disposed to cover a part of the mode conversion/branching portion, the object is disposed not to consecutively cover a section over a length of a predetermined value or higher in an advancing direction of a light wave. 1. An optical waveguide device comprising:a substrate on which an optical waveguide is formed; andan object that is disposed on the substrate,wherein the optical waveguide includes a portion that converts a mode of a light wave propagating through the optical waveguide and branches the light wave,wherein the object is disposed to cover a part or the whole of the portion or not to cover the portion at all when the substrate is viewed in a plan view, andwherein, in a case where the object is disposed to cover a part of the portion, the object is disposed not to consecutively cover a section over a length of a predetermined value or higher in an advancing direction of a light wave.2. The optical waveguide device according to claim 1 ,wherein the predetermined value is 40 μm, andwherein, in a case where the object is disposed to cover a plurality of discontinuous sections, a clearance of 20 μm or higher is provided between the sections.3. The optical waveguide device according to claim 1 ,wherein the object is an electrode controlling a light wave propagating through the optical waveguide, or a reinforcing member reinforcing connection between an optical fiber through which a light wave is input to the optical waveguide and ...

Подробнее
Номер записи: 74
30-01-2020 дата публикации

VARIFOCAL SYSTEM USING HYBRID TUNABLE LIQUID CRYSTAL LENSES

Номер: US20200033693A1
Автор: Lanman Douglas, Lu Lu, Peng Fenglin
Принадлежит:

A varifocal system comprises a stacked first-type liquid crystal (LC) lens structure and a stacked second-type LC lens structure in optical series. The stacked first-type LC lens structure includes a plurality of first-type LC lenses, and a first-type LC lens provides continuously variable optical states in a first step resolution. The stacked second-type LC lens structure includes a plurality of second-type LC lenses and provides a plurality of optical states in a second step resolution. The first step resolution is smaller than the second step resolution, such that when the stacked second-type LC lens structure is switched between two optical states, the first-type LC lenses provide a continuous adjustment of optical power between the two optical states. The stacked first-type LC lens structure and the stacked second-type LC lens structure together provide a continuous adjustment range of optical power for the varifocal system. 1. A varifocal system , comprising:a stacked first-type liquid crystal (LC) lens structure including a plurality of first-type LC lenses, wherein a first-type LC lens of the plurality of first-type LC lenses provides continuously variable optical states in a first step resolution; anda stacked second-type LC lens structure including a plurality of second-type LC lenses arranged in optical series with the stacked first-type LC lens structure, wherein the stacked second-type LC lens structure provides a plurality of optical states in a second step resolution,wherein:the first step resolution is smaller than the second step resolution, such that when the stacked second-type LC lens structure is switched between two optical states, the first-type LC lenses provide a continuous adjustment of optical power between the two optical states, andthe stacked first-type LC lens structure and the stacked second-type LC lens structure together provide a continuous adjustment range of optical power for the varifocal system.2. The varifocal system according ...

Подробнее
Номер записи: 75
30-01-2020 дата публикации

LIQUID CRYSTAL LENS, CONTROL METHOD THEREOF, LIQUID CRYSTAL LENS MODULE AND DISPLAY DEVICE

Номер: US20200033694A1
Автор: GAO JIAN
Принадлежит: BOE Technology Group Co., Ltd.

A liquid crystal lens, a control method thereof, a liquid crystal lens module and a display device are provided. The liquid crystal lens includes a first transparent substrate and two liquid crystal cells arranged at two opposite sides of the first transparent substrate. Each liquid crystal cell includes a first transparent electrode layer and a second transparent electrode layer; and a liquid crystal layer therebetween. The second transparent electrode layer includes a first electrode sub-layer and a second electrode sub-layer. The first electrode sub-layer includes N concentric first annular electrodes, and the second electrode sub-layer includes N concentric second annular electrodes. The first annular electrodes and the second annular electrodes are alternately arranged in a direction parallel with the first transparent electrode layer. Initial alignment orientations of liquid crystal molecules in liquid crystal layers in the two liquid crystal cells are perpendicular to each other. 1. A liquid crystal lens , comprising a first transparent substrate and two liquid crystal cells arranged at two opposite sides of the first transparent substrate , wherein each of the two liquid crystal cells comprises:a first transparent electrode layer and a second transparent electrode layer that are stacked; anda liquid crystal layer between the first transparent electrode layer and the second transparent electrode layer;wherein the second transparent electrode layer comprises a first electrode sub-layer and a second electrode sub-layer that are stacked in sequence; andthe first transparent electrode layer is of a plate-like structure, the first electrode sub-layer comprises N concentric first annular electrodes, and the second electrode sub-layer comprises N concentric second annular electrodes, wherein N is a positive integer, and the first annular electrodes and the second annular electrodes are alternately arranged in a direction parallel with the first transparent electrode ...

Подробнее
Номер записи: 76
04-02-2021 дата публикации

LENS UNIT

Номер: US20210033890A1
Автор: Aono Akifumi, HIKOSAKA Eiichiro, KAN Ryuki, MURAMATSU Akihiro
Принадлежит:

This lens unit comprises: a lens having a liquid crystal lens; a rim part that covers the peripheral edge section of the lens; a control unit that controls the liquid crystal lens; a conductive part that electrically connects the control unit and an electrode end section of the liquid crystal lens which is exposed at the peripheral edge section of the lens, and that is disposed between the rim part and the peripheral edge section of the lens; and a knob part that protrudes from the lens or rim part. 1. A lens unit , comprising:a lens having an electrical element;a rim portion covering a peripheral edge portion of the lens;a control unit for controlling the electrical element;an electric power supply unit for supplying electric power to the electrical element;a conductive portion being disposed between the rim portion and the peripheral edge portion of the lens and electrically connecting between an end portion of an electrode of the electrical element and the control unit, the end portion of the electrode being exposed to the peripheral edge portion; anda knob portion protruding from the lens or the rim portion.2. The lens unit according to claim 1 , wherein the conductive portion includes a conductive wire connected to the control unit claim 1 , and a conductive piece for electrically connecting between the electrode end portion and the conductive wire.3. The lens unit according to claim 2 , wherein a plurality of the conductive pieces electrically connect between a plurality of electrode end portions and the conductive wires claim 2 , respectively claim 2 , and are disposed apart from each other in a direction along the peripheral edge portion of the lens4. The lens unit according to claim 3 , wherein the plurality of conductive pieces are insulated from each other.5. The lens unit according to claim 2 , wherein:the rim portion comprises an opening in which the knob portion is disposed, andthe conductive piece is disposed to avoid the opening.6. The lens unit ...

Подробнее
Номер записи: 77
04-02-2021 дата публикации

OPTICAL DEVICE THAT INCLUDES OPTICAL MODULATOR

Номер: US20210033897A1
Автор: SUGIYAMA Masaki
Принадлежит: FUJITSU OPTICAL COMPONENTS LIMITED

An optical device includes an optical modulator on an optical IC chip. The optical modulator includes an optical waveguide, first and second wiring patterns that are formed along the optical waveguide and a polymer pattern. A portion of the polymer pattern is formed on the optical waveguide and located in a region between the first and second wiring patterns. Each of the first and second wiring patterns includes a modulation portion that is formed parallel to the optical waveguide, a pad portion, and a transition portion that connects the modulation portion and the pad portion. A shape of a region between the transition portion of the first wiring pattern and the transition portion of the second wiring pattern is a curve. The polymer pattern has a curved portion in the region between the transition portion of the first wiring pattern and the transition portion of the second wiring pattern. 1. An optical device that includes an optical modulator formed on an optical IC (Integrated Circuit) chip , wherein an optical waveguide,', 'a first wiring pattern that is formed on one side of the optical waveguide,', 'a second wiring pattern that is formed on the other side of the optical waveguide,', 'a first polymer pattern that is formed along one edge of the IC chip, and', 'a second polymer pattern that is connected to the first polymer pattern, at least a portion of the second polymer pattern being formed on the optical waveguide and located in a region between the first wiring pattern and the second wiring pattern,, 'the optical modulator includes'} a first modulation portion that is formed parallel to the optical waveguide,', 'a first pad portion that is formed at an end portion of the first wiring pattern, and', 'a first transition portion that connects the first modulation portion and the first pad portion,, 'the first wiring pattern includes'} a second modulation portion that is formed parallel to the optical waveguide,', 'a second pad portion that is formed at an end ...

Подробнее
Номер записи: 78
31-01-2019 дата публикации

System for optical linear sampling and coherent detection of an optical signal

Номер: US20190036612A1
Автор: Alexandre Shen, Jean-Guy Provost
Принадлежит: Alcatel Lucent SAS

A system for optical linear sampling and coherent detection of an optical signal OS comprises a source emitting a pulsed optical signal SP and an optical coupler that splits the pulsed optical signal SP into two replicas, the first replica of the pulsed optical signal SP is sent to a first optical hybrid circuit and the second replica of the pulsed optical signal SP is send to a second optical hybrid circuit, a source emitting an optical signal OS and optical coupler that splits the incoming optical signal OS into two replicas, the first replica of the incoming optical signal OS is sent to the first optical hybrid circuit and the second replica of the incoming optical signal OS is sent to to a wavelength recovery device WVLR, whose output is a continuous-waveform optical signal CW at the central wavelength of the incoming optical signal OS, which sends it to the second optical hybrid circuit. such that the optical signal OS is sampled within the first hybrid circuit and the continuous waveform optical signal CW is sampled in the second hybrid circuit, and a device BDADC comprising balanced photodectors detecting optical signals at the output of the two optical hybrid circuits and an analog/digital converter ADC.

Подробнее
Номер записи: 79
31-01-2019 дата публикации

LOW-CROSSTALK ELECTRO-OPTICAL MACH-ZEHNDER SWITCH

Номер: US20190037287A1
Автор: Dupuis Nicolas, Lee Benjamin G., RYLYAKOV ALEXANDER V., Soyuer Mehmet
Принадлежит:

Optical switches include a first hybrid coupler configured to accept an input and to provide two branches. A phase tuner on a first branch includes a phase shifter. A first heater is positioned on the first branch and a second heater is positioned on the second branch, each configured to compensate for phase error. A second hybrid coupler configured to recombine the two branches. A first photodetector and a second photodetector are positioned at outputs of the second hybrid coupler and are configured to measure crosstalk between the outputs of the second hybrid coupler. A controller is configured to activate the first heater or the second heater to reduce the measured crosstalk. 1. An optical switch , comprising:a first hybrid coupler configured to accept an input and to provide two branches;a phase tuner on a first branch comprising a phase shifter;a first heater on the first branch and a second heater on the second branch, each configured to compensate for phase error;a second hybrid coupler configured to recombine the two branches;a first photodetector and a second photodetector at outputs of the second hybrid coupler configured to measure crosstalk between the outputs of the second hybrid coupler; anda controller configured to activate the first heater or the second heater to reduce the measured crosstalk.2. The switch of claim 1 , wherein the phase shifter is push-pull driven.3. The switch of claim 1 , wherein the second branch further comprises an attenuator.4. The switch of claim 3 , wherein the attenuator is a variable optical attenuator.5. The switch of claim 3 , wherein the attenuator is a section of waveguide on the second branch that is doped.6. The switch of claim 3 , wherein the attenuator comprises a forward biased pin diode.7. The switch of claim 1 , wherein only the first branch comprises a tunable phase shifter.8. The switch of claim 1 , further comprising a third photodetector on either the first branch or the second branch claim 1 , configured to ...

Подробнее
Номер записи: 80
09-02-2017 дата публикации

Slow-light silicon optical modulator

Номер: US20170038609A1
Автор: Ashok V. Krishnamoorthy, Shiyun Lin, Xuezhe Zheng, Ying L. Luo
Принадлежит: Oracle International Corp

An optical modulator is described. This optical modulator may be implemented using silicon-on-insulator (SOI) technology. In particular, a semiconductor layer in an SOI platform may include a photonic crystal having a group velocity of light that is less than that of the semiconductor layer. Moreover, an optical modulator (such as a Mach-Zehnder interferometer) may be implemented in the photonic crystal with a vertical junction in the semiconductor layer. During operation of the optical modulator, an input optical signal may be split into two different optical signals that feed two optical waveguides, and then subsequently combined into an output optical signal. Furthermore, during operation, time-varying bias voltages may be applied across the vertical junction in the optical modulator using contacts defined along a lateral direction of the optical modulator.

Подробнее
Номер записи: 81
08-02-2018 дата публикации

VIRTUAL AND AUGMENTED REALITY SYSTEMS AND METHODS

Номер: US20180039084A1
Автор: Schowengerdt Brian T.
Принадлежит: Magic Leap, Inc.

A system for displaying virtual content to a user includes at least one light source to multiplex a plurality of light beams to display a respective plurality of light patterns associated with one or more frames of image data. The system also includes a plurality of waveguides to receive the plurality of light beams and to direct the plurality of light beams toward an exit pupil, wherein the plurality of waveguides are stacked along an optical axis of the user. The system further includes at least one optical element to modify a focus of a light beam of the plurality of light beams directed by the plurality of waveguides. 1. A system for displaying virtual content to a user , comprising:at least one light source to multiplex a plurality of light beams to display a respective plurality of light patterns associated with one or more frames of image data;a plurality of waveguides to receive the plurality of light beams and to direct the plurality of light beams toward an exit pupil, wherein the plurality of waveguides are stacked along an optical axis of the user; andat least one optical element to modify a focus of a light beam of the plurality of light beams directed by the plurality of waveguides.2. The system of claim 1 , wherein the at least one optical element modifies the light beam in a manner such that a wavefront curvature is created claim 1 , andwherein the created wavefront curvature corresponds to a focal plane when the light beam is viewed by the user.3. The system of claim 1 , wherein a waveguide of the plurality of waveguides is switchable between on and off states.4. The system of claim 1 , wherein a waveguide of the plurality of waveguides is a static waveguide.5. The system of claim 1 , wherein an optical element of the at least one optical elements is switchable between on and off states.6. The system of claim 1 , wherein an optical element of the at least one optical elements is a static optical element.7. The system of claim 1 , wherein an optical ...

Подробнее
Номер записи: 82
08-02-2018 дата публикации

OPTICAL WAVEGUIDE DEVICE

Номер: US20180039104A1
Автор: HOSOKAWA Youichi, Miyazaki Norikazu
Принадлежит:

Object 1. An optical waveguide device comprising:a substrate having an electro-optic effect;an optical waveguide formed on the substrate; anda control electrode having a signal electrode and ground electrodes for controlling light waves that propagate through the optical waveguide,wherein the signal electrode has, in an intersection portion in which the signal electrode is disposed on the optical waveguide, a narrow portion at which a width of the signal electrode is narrower than those of portions before and after the intersection portion.2. The optical waveguide device according to claim 1 ,wherein an interval between the ground electrodes that put the narrow portion therebetween is substantially equal to an interval between the ground electrodes that put the signal electrode therebetween in the portions before and after the narrow portion.3. The optical waveguide device according to claim 1 ,wherein a width of the narrow portion is 0.75 times or less widths of the portions before and after the intersection portion.4. The optical waveguide device according to claim 1 ,wherein a length of the narrow portion is 1.5 times or more mode field diameters of light waves that propagate through the optical waveguide.5. The optical waveguide device according to claim 1 ,wherein a width of the signal electrode gradually narrows toward the narrow portion.6. The optical waveguide device according to claim 1 ,wherein an angle at which a central line of the signal electrode and a central line of the optical waveguide intersect with each other in the intersection portion is 45 degrees or more and 90 degrees or less. The present invention relates to an optical waveguide device and particularly to an optical waveguide device in which electrodes are formed near part of optical waveguides.In recent years, in the field of optical communication or optical measurement, optical waveguide devices such as waveguide-type optical modulators in which optical waveguides are formed on a ...

Подробнее
Номер записи: 83
08-02-2018 дата публикации

SEGMENTED TRAVELING WAVE OPTICAL MODULATORS AND RELATED METHODS

Номер: US20180039151A1
Автор: Aroca Ricardo, Chen Long, Doerr Christopher
Принадлежит: Acacia Communications, Inc.

A segmented traveling wave Mach Zehnder optical modulator is described. The segmented traveling wave Mach Zehnder optical modulator may comprise two or more radio frequency (RF) segments, and each RF segment may be configured to support a modulating RF signal. The modulating RF signals may be configured to modulate an optical signal propagating along an optical path of the segmented traveling wave Mach Zehnder optical modulator. The RF modulating signal in the second RF segment may be generated by amplifying the modulating RF signal of the first RF segment, using an RF amplifier. The RF amplifier may be configured to amplify a band-pass spectral portion of the modulating RF signal. 1. A traveling wave optical modulator comprising:tandem optical and radio frequency (RF) paths, the optical path having a first length and a second length and being configured to support an optical signal and the RF path being a segmented RF path configured to support an RF signal and having a first RF segment disposed along the first length of the optical path and a second RF segment disposed along the second length of the optical path, wherein the first RF segment is configured to provide the RF signal to the second RF segment; andan RF amplifier coupled to an input of the second RF segment.2. The apparatus of claim 1 , wherein the RF amplifier is coupled to the input of the second RF segment through a coupler claim 1 , the coupler comprising:a first input connected to an output of the RF amplifier;a second input coupled to an output of the first RF segment; andan output coupled to the input of the second RF segment.3. The apparatus of claim 2 , wherein the coupler comprises a transformer.4. The apparatus of claim 2 , wherein the coupler comprises an electromagnetic coupler.5. The apparatus of claim 2 , wherein the optical path is integrated on a first chip and the RF amplifier is integrated on a second chip.6. The apparatus of claim 5 , wherein the first chip and the second chip are ...

Подробнее
Номер записи: 84
09-02-2017 дата публикации

Enhanced Visual Perception Through Distance-Based Ocular Projection

Номер: US20170039906A1
Автор: Jepsen Mary Lou
Принадлежит:

A display device includes a two-dimensional array of tiles. Each tile includes a two-dimensional array of pixels and an electro-optic element of a two-dimensional array of electro-optic elements. The device includes one or more processors configured to: obtain an image of an object; activate at least a subset of the two-dimensional array of tiles for outputting a collective pattern of light that includes at least a portion of the image of the object; and activate at least a subset of the two-dimensional array of electro-optic elements for projecting the collective pattern of light. At least the subset of the two-dimensional array of electro-optic elements is configured to have a focal length, that is selected based on proximity of the object in a distance model, for projecting the collective pattern of light. 1. A display device , comprising:a two-dimensional array of tiles, each tile comprising:a two-dimensional array of pixels, wherein each pixel is configured to output light so that the two-dimensional array of pixels outputs a respective pattern of light; andan electro-optic element, of a two-dimensional array of electro-optic elements, configured to direct at least a portion of the respective pattern of light from the two-dimensional array of pixels to a pupil of an eye of a user; and obtain an image of an object;', 'activate at least a subset of the two-dimensional array of tiles for outputting, from at least the subset of the two-dimensional array of tiles, a collective pattern of light that includes at least a portion of the image of the object; and', 'activate at least a subset of the two-dimensional array of electro-optic elements for projecting the collective pattern of light, wherein at least the subset of the two-dimensional array of electro-optic elements is configured to have a focal length, that is selected based on proximity of the object in a distance model, for projecting the collective pattern of light., 'one or more processors coupled with the ...

Подробнее
Номер записи: 85
12-02-2015 дата публикации

OPITCAL PULSE-GENERATOR

Номер: US20150043864A1
Автор: Hara Tokutaka, SUDO Masaaki
Принадлежит:

Provided is an optical pulse-generator capable of efficiently using by a low driving voltage an entire band of an optical frequency comb input to a chirp compensator for the formation of an optical pulse. According to a graph shown in FIG. , dispersion compensation amounts (dispersion characteristics) necessary for a chirp (dispersion) compensator to efficiently compress an optical frequency comb which sinusoidally changes become an inverse of a parabolic coefficient. It is found that the dispersion compensation amount required at the center frequency is 2/π of that of a chirp being approximate to a linear chirp, and the required dispersion compensation amount increases as the frequency shift increases. 1. An optical pulse-generator comprising at least: an optical modulation unit being a phase modulator; and', 'a modulation signal-generating unit configured to generate a modulation signal for modulating light,, 'an optical frequency comb generator comprisingthe optical frequency comb generator being configured to generate an optical frequency comb; anda chirp compensator configured to compress and output the optical frequency comb output from the optical frequency comb generator in accordance with the dispersion characteristics in which the dispersion values of frequencies increase with increasing the distance from the center frequency of the optical frequency comb.2. The optical pulse-generator according to claim 1 ,wherein the optical modulation unit is configured to modulate a phase with a sinusoidal waveform.4. The optical pulse-generator according to claim 1 , further comprising a band-pass filter provided between the optical frequency comb generator and the chirp compensator or behind the chirp compensator claim 1 , andthe band-pass filter having a bandwidth which removes the optical frequency comb components in a frequency range in which chirp characteristics in a frequency range away from the center frequency and dispersion characteristics of the chirp ...

Подробнее
Номер записи: 86
12-02-2015 дата публикации

MACH-ZEHNDER MODULATOR ARRANGEMENT AND METHOD FOR OPERATING A MACH-ZEHNDER MODULATOR ARRANGEMENT

Номер: US20150043865A1
Автор: Velthaus Karl-Otto
Принадлежит:

A Mach-Zehnder modulator arrangement includes at least one electro-optic Mach-Zehnder modulator having a first optical waveguide forming a first modulator arm and a second optical waveguide forming a second modulator arm. A travelling wave electrode arrangement includes first waveguide electrodes for applying a voltage across the first optical waveguide and second waveguide electrodes for applying a voltage across the second optical waveguide. The first waveguide electrodes are capacitively coupled to the second waveguide electrodes. A driver unit supplies an alternating voltage to the travelling wave electrode arrangement. The driver unit includes a first output port coupled to the first waveguide electrodes and a second output port coupled to the second waveguide electrodes. The driver unit supplies a first varying signal to the first waveguide electrodes via the first output port and a second varying signal to the second waveguide electrodes via the second output port.

Подробнее
Номер записи: 87
12-02-2015 дата публикации

Electro-Optic Silicon Modulator With Capacitive Loading In Both Slots Of Coplanar Waveguides

Номер: US20150043866A1
Автор: Chen Changhua, Pan Dong, Su Tzungi, Zhang Yanwu
Принадлежит: SIFOTONICS TECHNOLOGIES CO., LTD.

Embodiments of the present disclosure provide a high-speed silicon modulator without the microwave mode conversion and provide 50-ohm impedance matching to drivers simultaneously. In one aspect, a device may include an input waveguide region, an optic splitter, two optic phase shifters, an optic splitter, and an output waveguide. The device may include two curved waveguides. Either or both of the curved waveguides may have specially doped regions including PN junctions or MOS capacitors. The PN junctions or MOS capacitors may be alternatively connected to both slots of a coplanar waveguide forming the electrodes.

Подробнее
Номер записи: 88
12-02-2015 дата публикации

Semiconductor optical device and method for manufacturing semiconductor optical device

Номер: US20150043867A1
Автор: Hideki Yagi, Naoya KONO, Takamitsu Kitamura
Принадлежит: Sumitomo Electric Industries Ltd

A method for manufacturing a semiconductor optical device includes the steps of growing a stacked layer including lower and upper core layers, a first upper region including a non-doped layer, a second upper region including a p-type layer, and a cap layer; forming an upper mesa by etching the stacked layer; selectively etching the cap layer in the upper mesa on the first and second regions; forming a mask on the upper mesa in the second and third regions; and etching the upper mesa using the mask so as to form first to fourth mesa portions. The first and fourth mesa portions are formed by etching the first and second upper regions, and the second upper region and the cap layer, respectively. The second and third mesa portions are formed by etching the first and second upper regions, and the second upper region and the cap layer, respectively.

Подробнее
Номер записи: 89
08-02-2018 дата публикации

IMAGE DISPLAY DEVICE, PROJECTOR, AND TRANSMISSION TYPE DISPLAY DEVICE

Номер: US20180041739A1
Автор: OTANI Makoto
Принадлежит: SEIKO EPSON CORPORATION

An image display device capable of being incorporated into a projector, an HMD, or the like and capable of adjusting an image formation position for each image area, a projector, and a transmission type display device into which the image display device is incorporated. In an image display device, a refractive index distribution regarding a passing area of light emitted from an optical modulation device is changed by a pixel unit of a refractive index distribution variable panel. In a projector in which the image display device is incorporated, the refractive index distribution variable panel is inserted immediately after the optical modulation device so as to make it possible to perform focusing at all areas even for a screen (surface to be irradiated) having any shape. 110-. (canceled)11. A projector comprising:an image display device which includes an illumination optical system which emits light, an optical modulation device which modulates light emitted from the illumination optical system, and a refractive index distribution variable panel which is disposed at a rear stage in an optical path of the optical modulation device and which changes a refractive index in a pixel unit or in an area unit including a plurality of pixels depending on a passing area of light emitted from the optical modulation device;a projection optical system which projects light from the image display device;a shape obtaining portion which obtains information of a surface shape of a surface to be irradiated by the projection optical system; anda refractive index distribution controller which controls refractive index distribution in the refractive index distribution variable panel based on information obtained in the shape obtaining portion.12. The projector according to claim 11 ,wherein the refractive index distribution variable panel is a light transmission type liquid crystal panel.13. The projector according to claim 11 , further comprising:an emission side polarization plate which ...

Подробнее
Номер записи: 90
24-02-2022 дата публикации

SEMICONDUCTOR ELECTRO-OPTICAL MODULATOR

Номер: US20220057690A1
Автор: Anderson Sean P., Zhu Haike
Принадлежит: MACOM Technology Solutions Holdings, Inc.

Semiconductor electro-optical modulators which receives an input optical signal and provides a modulated output optical signal based on an input electrical signal are disclosed. The semiconductor electro-optical modulator may comprise at least one electrical transmission line adapted to carry the input electrical signal and a semiconductor electro-optical phase shifter waveguide electrically coupled to the at least one electrical transmission line. An optical path length of the semiconductor electro-optical phase shifter waveguide between a modulation begin plane of the semiconductor electro-optical modulator and a modulation end plane of the semiconductor electro-optical modulator may be greater than an electrical path length of the electrical transmission line between the modulation begin plane of the semiconductor electro-optical modulator and the modulation end plane of the semiconductor electro-optical modulator. 1. A semiconductor electro-optical modulator which receives an input optical signal and provides a modulated output optical signal based on an input electrical signal , the semiconductor electro-optical modulator comprising:at least one electrical transmission line adapted to carry the input electrical signal;a semiconductor electro-optical phase shifter waveguide having a p-doped portion and a n-doped portion, an input end adapted to receive the input optical signal, and an output end whereat the modulated output optical signal exits the semiconductor electro-optical phase shifter waveguide; anda plurality of electrical connectors electrically coupling the at least one electrical transmission line to the semiconductor electro-optical phase shifter waveguide, the semiconductor electro-optical phase shifter waveguide having a modulation begin plane corresponding to a connection of a first electrical connector of the plurality of electrical connectors to the semiconductor electro-optical phase shifter waveguide and a modulation end plane corresponding to ...

Подробнее
Номер записи: 91
07-02-2019 дата публикации

OPTICAL MODULATOR AND OPTICAL TRANSMISSION DEVICE USING SAME

Номер: US20190041717A1
Автор: Sugamata Toru
Принадлежит:

To provide a highly-reliable low-cost small optical modulator in which temperature drift is suppressed and an optical transmission device using the same. An optical modulator including an optical waveguide substrate on which an optical waveguide is formed, a signal electrode which is provided on the optical waveguide substrate and applies an electric field to the optical waveguide, a termination substrate provided with a termination resistor that terminates the signal electrode, and a housing in which the optical waveguide substrate and the termination substrate are mounted, in which, in order to suppress conduction of heat generated from the termination resistor to the optical waveguide substrate through the housing, a groove is formed in the housing between the termination substrate and the optical waveguide substrate 1. An optical modulator comprising:an optical waveguide substrate on which an optical waveguide is formed;a signal electrode which is provided on the optical waveguide substrate and applies an electric field to the optical waveguide;a termination substrate provided with a termination resistor that terminates the signal electrode; anda housing in which the optical waveguide substrate and the termination substrate are mounted,wherein, in order to suppress conduction of heat generated from the termination resistor to the optical waveguide substrate through the housing,a groove is formed in the housing between the termination substrate and the optical waveguide substrate.2. An optical modulator comprising:an optical waveguide substrate on which an optical waveguide is formed;a signal electrode which is provided on the optical waveguide substrate and applies an electric field to the optical waveguide;a termination substrate provided with a termination resistor that terminates the signal electrode; anda housing in which the optical waveguide substrate and the termination substrate are mounted,wherein, in order to suppress conduction of heat generated from ...

Подробнее
Номер записи: 92
06-02-2020 дата публикации

HEAD-MOUNTED DISPLAY AND IMAGING APPARATUS FOR DISPLAYING IMAGE THEREOF

Номер: US20200041806A1
Автор: Chen Yu-Heng, Choi Iok Kan, Ding Ling-Yi, Yang Po-Sen
Принадлежит: HTC CORPORATION

A head-mounted display and an imaging apparatus for displaying image thereof are provided. The imaging apparatus includes a first display, a second display, and a first focus adjusting apparatus. The first display generates a first sub-image; wherein the first sub-image is located on a first imaging plane, and is then projected to the target system. The second display generates a second sub-image; wherein the second sub-image is located on a second imaging plane, and is then projected to the target system. The first focus adjusting apparatus is in front of the second display, and is used to adjust the position of the second imaging plane. The first imaging surface and a second imaging surface are overlapped or non-overlapped. 1. An imaging apparatus for displaying image , comprising:a first display, generating a first sub-image on a first imaging plane;a second display, generating a second sub-image on a second imaging plane; anda first focus adjusting apparatus, disposed in front of the second display, configured to adjust a position of the second imaging plane;wherein the first imaging plane and the second imaging plane are overlapped or non-overlapped.2. The imaging apparatus for displaying image as claimed in claim 1 , further comprising:a controller, coupled to the first focus adjusting apparatus, the controller transmitting a control signal to the first focus adjusting apparatus,wherein the first focus adjusting apparatus adjusts the position of the second imaging plane according to the control signal.3. The imaging apparatus for displaying image as claimed in claim 1 , wherein the first sub-image comprises a plurality of first display pixels claim 1 , the second sub-image comprises a plurality of second display pixels claim 1 , and the first display pixels and the second display pixels are arranged in an alternating manner when the first imaging plane and the second imaging plane are overlapped.4. The imaging apparatus for displaying image as claimed in claim ...

Подробнее
Номер записи: 93
06-02-2020 дата публикации

OPTICAL MODULATOR, OPTICAL MODULATOR MODULE, AND OPTICAL TRANSMITTER MODULE

Номер: US20200041824A1
Автор: DOI Masaharu, Kubota Yoshinobu, Ohmori Yasuhiro, Takeuchi Shintaro, Yoshida Yoshihiko
Принадлежит: FUJITSU OPTICAL COMPONENTS LIMITED

An optical modulator includes an optical waveguide of a ridge type formed of a thin film of a dielectric material having an electro-optic effect over a substrate, a buffer layer covering the optical waveguide, and a signal electrode provided over the optical waveguide via the buffer layer, wherein a width of the signal electrode is greater than a ridge width of the optical waveguide and wherein the signal electrode covers at least one of sidewalls of a ridge of the optical waveguide. 1. An optical modulator comprising:an optical waveguide of a ridge type formed of a thin film of a dielectric material having an electro-optic effect over a substrate;a buffer layer covering the optical waveguide; anda signal electrode provided over the optical waveguide via the buffer layer,wherein a width of the signal electrode is greater than a ridge width of the optical waveguide and wherein the signal electrode covers at least one of sidewalls of a ridge of the optical waveguide.2. The optical modulator as claimed in claim 1 ,wherein the signal electrode covers, via the buffer layer, both sidewalls of the ridge of the optical waveguide symmetrically with respect to a center in a width direction of the ridge.3. The optical modulator as claimed in claim 1 ,wherein the signal electrode covers, via the buffer layer, both sidewalls of the ridge of the optical waveguide asymmetrically with respect to a center in a width direction of the ridge.4. The optical modulator as claimed in claim 1 ,wherein the signal electrode covers, via the buffer layer, one of the sidewalls of the ridge of the optical waveguide, andwherein a sidewall of the signal electrode is in alignment with a surface of the buffer layer at another of the sidewalls of the ridge of the optical waveguide.5. The optical modulator as claimed in claim 1 , further comprising:a ground electrode provided over the thin film at a predetermined distance from the signal electrode,wherein the thin film located under the ground ...

Подробнее
Номер записи: 94
06-02-2020 дата публикации

LIQUID LENS AND CAMERA MODULE INCLUDING THE SAME

Номер: US20200041863A1
Автор: Eom Jun Phill, KIM Ui Jun
Принадлежит: LG INNOTEK CO., LTD.

A liquid lens includes a cavity in which a conductive liquid and a non-conductive liquid are disposed and at least one first through-hole in which at least one of a conductive material or an adhesive material is disposed, a first electrode disposed on the first plate, a second electrode disposed under the first plate, the second electrode including a plurality of electrode sectors, a second plate disposed on the first electrode, and a third plate disposed under the second electrode. 1. A liquid lens , comprising:a first plate comprising a cavity in which a conductive liquid and a non-conductive liquid are disposed and at least one first through-hole in which at least one of a conductive material or an adhesive material is disposed;a first electrode disposed on the first plate;a second electrode disposed under the first plate, the second electrode comprising a plurality of electrode sectors;a second plate disposed on the first electrode; anda third plate disposed under the second electrode.2. The liquid lens according to claim 1 , wherein the at least one first through-hole is formed so as to penetrate the first plate in an upward-and-downward direction of the first plate.3. The liquid lens according to claim 1 , comprising a trench in inch the adhesive material is disposed claim 1 , the trench being disposed at the first plate.4. The liquid lens according to claim 1 , wherein the conductive material is disposed on an inner circumferential surface of the at least one first through-hole.5. The liquid lens according to claim 4 , wherein the adhesive material disposed in the at least one first through-hole is disposed on an inner circumferential surface of the conductive material.6. The liquid lens according to claim 5 , wherein the at least one first through-hole is disposed at a position corresponding to the first electrode or the second electrode.7. The liquid lens according to claim 1 , wherein the third plate comprises at least one second through-hole corresponding ...

Подробнее
Номер записи: 95
06-02-2020 дата публикации

SYSTEMS AND METHODS FOR LASER SYSTEMS WITH VARIABLE BEAM PARAMETER PRODUCT UTILIZING THERMO-OPTIC EFFECTS

Номер: US20200041864A1
Автор: Chann Bien, Deutsch Michael, Nguyen Dat, Tayebati Parviz, VILLARREAL-SAUCEDO Francisco
Принадлежит:

In various embodiments, a beam-parameter adjustment system and focusing system alters a spatial power distribution of a radiation beam, via thermo-optic effects, before the beam is coupled into an optical fiber or delivered to a workpiece. 126.-. (canceled)27. A beam-parameter adjustment system and focusing system for receiving and altering a spatial power distribution of a radiation beam from a beam source and focusing the radiation with the altered spatial power distribution onto a workpiece , the system comprising:a thermo-optic element for receiving the radiation beam and propagating the radiation beam toward the workpiece;spaced apart from the thermo-optic element, a heat source for heating portions of the thermo-optic element to alter refractive indices thereof, thereby forming an optical distortion pattern within the thermo-optic element;one or more first optical elements for receiving heat from the heat source and directing the heat to the thermo-optic element, whereby the optical distortion pattern is formed within the thermo-optic element;focusing optics for receiving the radiation beam from the thermo-optic element and focusing the radiation beam on the workpiece; anda controller for controlling the thermo-optic element and/or the heat source to achieve a target altered spatial power distribution on the workpiece, the target altered spatial power distribution resulting at least in part from interaction between the radiation beam and the optical distortion pattern within the thermo-optic element.28. The system of claim 27 , further comprising a second optical element for directing the radiation beam onto the thermo-optic element.29. The system of claim 28 , wherein the second optical element comprises one or more lenses and/or one or more mirrors.30. The system of claim 28 , wherein at least one said first optical element is disposed within an optical path between the second optical element and the thermo-optic element.31. The system of claim 30 , wherein ...

Подробнее
Номер записи: 96
18-02-2021 дата публикации

LENS UNIT AND SEE-THROUGH TYPE DISPLAY APPARATUS INCLUDING THE SAME

Номер: US20210048677A1
Автор: HONG Jongyoung, LEE Byoungho, Lee Changkun, Lee Hongseok, MOON Seokil, SUNG Geeyoung
Принадлежит:

A see-through type display apparatus includes a see-through type optical system configured to transmit a first image via a first-path light, which is light traveling on a first path, to an ocular organ of a user, and a second image via a second-path light, which is light traveling on a second path, to the ocular organ of the user; and an incident light-dependent lens unit provided between the see-through type optical system and the ocular organ of the user and having different refractive powers according to characteristics of incident light, where the incident light-dependent lens unit has a positive first refractive power with respect to the first-path light and has a second refractive power different from the first refractive power with respect to the second-path light. 1. A see-through type display apparatus comprising:a see-through type optical system configured to transmit a first image by a first-path light, which is light traveling on a first path, to an ocular organ of a user, and a second image by a second-path light, which is light traveling on a second path, to the ocular organ of the user; andan incident light-dependent lens unit provided between the see-through type optical system and the ocular organ of the user and having different characteristics according to polarization directions of incident light, a first lens having a focal length varying according to the polarization directions of the incident light; and', 'a second lens joined to the first lens and having a constant focal length regardless of the polarization directions of the incident light., 'wherein the incident light-dependent lens unit comprises2. The see-through type display apparatus of claim 1 , wherein the incident light-dependent lens unit is configured to function as a convex lens with respect to the first-path light and to function as a flat plate with respect to the second-path light.3. The see-through type display apparatus of claim 1 , wherein the first lens has a positive first ...

Подробнее
Номер записи: 97
16-02-2017 дата публикации

OPTICAL MODULATOR

Номер: US20170045688A1
Автор: DOI Masaharu
Принадлежит: FUJITSU OPTICAL COMPONENTS LIMITED

An optical modulator includes a modulating unit, an optical fiber, and a combining unit. The modulating unit outputs first and second optical beams with the electric signal superimposed thereon in a first direction. The optical fiber is placed along a second direction perpendicular to the first direction. The combining unit combines the first and second optical beams output by the modulating unit and outputs an optical beam obtained by the first and second optical beams being combined to the optical fiber. The combining unit includes a polarized light rotating element and a polarized light combining element. The polarized light rotating element rotates the polarization direction of the first optical beam. The polarized light combining element reflects the first optical beam of which the polarization direction has been rotated and the second optical beam in the second direction, and combines the first and second optical beams reflected in the second direction. 1. An optical modulator comprising:a modulating unit that superimposes an electric signal on light, and outputs first and second optical beams with the electric signal superimposed thereon in a first direction;an optical fiber that is placed along a second direction perpendicular to the first direction; anda combining unit that combines the first and second optical beams output by the modulating unit and outputs an optical beam obtained by the first and second optical beams being combined to the optical fiber, wherein a polarized light rotating element that rotates a polarization direction of the first optical beam; and', 'a polarized light combining element that reflects the first optical beam of which the polarization direction has been rotated by the polarized light rotating element and the second optical beam in the second direction, and combines the first and second optical beams reflected in the second direction., 'the combining unit includes2. The optical modulator according to claim 1 , wherein a first ...

Подробнее
Номер записи: 98
07-02-2019 дата публикации

SEMICONDUCTOR LIGHT-EMITTING DEVICE

Номер: US20190044301A1
Автор: ADACHI Koichiro
Принадлежит:

The first transmission line has a width perpendicular to a transmission direction. The first electrode has a width not exceeding the width. The first electrode is opposed to the first transmission line. The ground layer has a positional relationship with each portion of the first transmission line. The ground layer is next to the first transmission line on at least one side consisting of a first side along a thickness direction of the mounting substrate, and a second side and a third side with the first transmission line interposed therebetween. The first transmission line is bonded to the first electrode and has the width equivalently, at least, at a portion of the first transmission line. The portion equivalently has the positional relationship with the ground layer. The portion is next to the ground layer in an equivalent shape along the transmission direction. 1. Semiconductor light-emitting device comprising:a light source;a modulator for modulating output light from the light source, the modulator having a first electrode and a second electrode; anda mounting substrate on which the light source and the modulator are mounted, the mounting substrate having a first transmission line electrically connected to the first electrode, the mounting substrate having a second transmission line electrically connected to the second electrode, the mounting substrate having a ground layer connected to a ground potential,whereinthe first transmission line and the second transmission line constitute a pair of differential signal lines,the first transmission line has a width perpendicular to a transmission direction,the first electrode has a width not exceeding the width of the first transmission line, the first electrode being opposed to the first transmission line,the ground layer has a positional relationship with each portion of the first transmission line, where the ground layer is next to the first transmission line on at least one side consisting of a first side along a ...

Подробнее
Номер записи: 99
15-02-2018 дата публикации

VIRTUAL AND AUGMENTED REALITY SYSTEMS AND METHODS

Номер: US20180045965A1
Автор: Schowengerdt Brian T.
Принадлежит: Magic Leap, Inc.

A method for displaying virtual content to a user, the method includes determining an accommodation of the user's eyes. The method also includes delivering, through a first waveguide of a stack of waveguides, light rays having a first wavefront curvature based at least in part on the determined accommodation, wherein the first wavefront curvature corresponds to a focal distance of the determined accommodation. The method further includes delivering, through a second waveguide of the stack of waveguides, light rays having a second wavefront curvature, the second wavefront curvature associated with a predetermined margin of the focal distance of the determined accommodation. 1. A method for displaying virtual content to a user , the method comprising:determining an accommodation of the user's eyes;delivering, through a first waveguide of a stack of waveguides, light rays having a first wavefront curvature based at least in part on the determined accommodation, wherein the first wavefront curvature corresponds to a focal distance of the determined accommodation; anddelivering, through a second waveguide of the stack of waveguides, light rays having a second wavefront curvature, the second wavefront curvature associated with a predetermined margin of the focal distance of the determined accommodation.2. The method of claim 1 , wherein the margin is a positive margin.3. The method of claim 1 , wherein the margin is a negative margin.4. The method of claim 1 , wherein delivering the light rays having the second wavefront curvature through the second waveguide increases a focal range in which the user can accommodate.5. The method of claim 1 , wherein the first waveguide is coupled to a variable focus element (VFE) claim 1 , wherein the VFE varies a focus at which the first waveguide focuses the light rays.6. The method of claim 5 , wherein the focus is varied based at least in part on the determined accommodation of the users' eyes.7. The method of claim 1 , wherein the ...

Подробнее
Номер записи: 100