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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

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Мониторинг СМИ

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

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Применить Всего найдено 12831. Отображено 100.
19-01-2012 дата публикации

Holographic mirror for optical interconnect signal routing

Номер: US20120014643A1
Автор: Alexandre M. Bratkovski, Michael Renne Ty Tan
Принадлежит: Hewlett Packard Development Co LP

A holographic mirror 10 for re-directing an optical signal that includes a base 14 having an outer surface 16, and a plurality of discrete nano-structures 12 formed into the outer surface of the base. Each nano-structure has an out-of-plane dimension 20 that is within an order of magnitude of one or both in-plane dimensions 22. The plurality of nano-structures are configured in a repeating pattern with a predetermined spacing 18 between nano-structures for re-directing an optical signal.

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Номер записи: 1
01-03-2012 дата публикации

Wavelength tunable optical filter and reflecting element for an optical device

Номер: US20120050873A1
Автор: Cornel Marxer
Принадлежит: Sercalo Microtechnology Ltd

The invention relates to an optical filter comprising an optical source ( 2 ), emitting a light beam comprising a plurality of wavelengths, an optical receiver ( 3 ), and, optically aligned between the source ( 2 ) and receiver ( 3 ), at least one collimating and converging optical element ( 10 ), one dispersive optical element ( 20 ) capable of angularly separating the wavelengths, and a reflecting element ( 30 ) mobile about an axis (AA) capable, depending on its orientation about the axis (AA), of reflecting a specific wavelength toward the optical receiver ( 3 ). The optical elements ( 10, 20, 30 ) are arranged so that the light beam passes at least once through the dispersive element ( 20 ) before reaching the optical receiver ( 3 ). According to the invention the reflecting element ( 30 ) includes at least two faces ( 31, 32 ) defining a first and a second plane intersecting on a line parallel to the axis (AA) of rotation of the reflecting element ( 30 ).

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Номер записи: 2
01-03-2012 дата публикации

Optical wavelength filter with wavelength characteristic variation minimized

Номер: US20120051689A1
Автор: Hideaki Okayama
Принадлежит: Oki Electric Industry Co Ltd

An optical wavelength filter has optical waveguides each of which includes a cladding layer and a core having a refractive index that is as high as that of the cladding layer by a factor of 1.4 or more. Each optical waveguide is partitioned into a reference section providing a reference and an adjustment section for adjusting phase differences. The reference section of each optical waveguide is so set that the optical waveguide in this section has a first equivalent refractive index and a first length. The adjustment section is so set that the waveguide in this adjustment section has a second equivalent refractive index and a second length. Two waves of light outputted from the output ends of adjacent two of the optical waveguides interfere with each other with a predetermined phase difference, thereby accomplishing independency of temperature and dimensional error.

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Номер записи: 3
08-03-2012 дата публикации

Deflection measuring device according to the interferometer principle

Номер: US20120057169A1
Автор: Henrik Krisch
Принадлежит: Krohne Messtechnik GmbH and Co KG

An interferometer type deflection measuring device having a radiation source, a first fiber-optic means forming a first light path, a second fiber-optic means forming a second light path, a deflection body and an evaluation circuit, the first and second fiber-optic means receiving radiation from the radiation source on an input side, and radiation guided in the first and second fiber-optic means, respectively, being brought together on an output side with interference radiation being conveyed to the evaluation circuit for evaluation. The first fiber-optic means and the second fiber-optic means are arranged only on the deflection body, at least one of the first and second fiber-optic means being connected on the input side to the beam source with a single feed optical fiber and at least one of the first and second fiber-optic means being connected on the output side to the evaluation circuit by a single evaluation optical fiber.

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Номер записи: 4
08-03-2012 дата публикации

Redundant ring resonators of varying dimensions to reduce ring resonator tuning requirements

Номер: US20120057866A1
Автор: Moray McLaren, Norman Paul Jouppi
Принадлежит: Hewlett Packard Development Co LP

Various embodiments of the present invention relate to systems for reducing the amount of power consumed in temperature tuning resonator-based transmitters and receivers. In one aspect, a system comprises an array of resonators ( 801 - 806 ) disposed adjacent to a waveguide ( 646 ) and a heating element ( 808 ). The heating element is operated to thermally tune the array of resonators so that each resonator in a subset of the array of resonators is in resonance with a wavelength of light traveling in the waveguide.

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Номер записи: 5
17-05-2012 дата публикации

Optically variable filter apparatus and filter characteristic control method thereof

Номер: US20120120475A1
Автор: Yasuki Sakurai
Принадлежит: Individual

Light from an optical fiber is incident on a frequency dispersion element. The frequency dispersion element disperses the incident light into light beams in different directions according to their frequencies and directs the dispersed light beams to a lens. The lens develops the incident light beams over an xy plane according to their frequencies in a strip-like form. A frequency selective element has pixels arranged in a frequency dispersion direction and brings pixels located at positions corresponding to the frequency to be selected into a reflective state. A light beam selected by the frequency selective element is emitted from an optical fiber through the same path. By changing reflection characteristics of the frequency selective element according to each pixel, optical filter characteristics can be desirably changed so as to achieve change of passband width and frequency shift.

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Номер записи: 6
21-06-2012 дата публикации

Multi-core optical cable to photonic circuit coupler

Номер: US20120155805A1
Автор: Christopher Doerr
Принадлежит: Alcatel Lucent SAS

An optical device includes a substrate and a plurality of three or more planar waveguides formed over the substrate. Each planar waveguide includes a corresponding grating coupler formed therein. The grating couplers are arranged in a non-collinear pattern over said substrate. The plurality of grating couplers is configured to optically couple to a corresponding plurality of fiber cores in a multi-core optical cable.

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Номер записи: 7
26-07-2012 дата публикации

Multi-laser transmitter optical subassembly

Номер: US20120189323A1
Автор: Bernd Huebner, Xiaojie Xu
Принадлежит: Finisar Corp

Multi-laser transmitter optical subassembly (TOSAs) for an optoelectronic module. In one example embodiment, a method of fabricating a multi-laser TOSA includes various acts. First, first and second optical signals are transmitted from first and second lasers, respectively. Next, the angle of a first minor actively adjusted to reflect the first optical signal toward a first filter that reflects the first optical signal and transmits the second optical signal such that the first and second optical signals are aligned and combined.

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Номер записи: 8
23-08-2012 дата публикации

Coupled Photonic Microdevices With Sub-Wavelength Feature Size

Номер: US20120213474A1
Автор: David J. DiGiovanni, Mikhail Sumetsky
Принадлежит: OFS FITEL LLC

Complex, coupled photonic microdevices are formed to include sub-wavelength-sized radial perturbations sufficient to create resonant cavities, where these devices may be formed along the length of a single optical fiber and coupled together to form relatively complex photonic devices. By carefully selecting the placement and separation of these local radius variations, and using microfibers (or other suitable arrangements) to couple optical signals into and out of the device fiber, resonances in the form of whispering gallery modes (WGMs) are created in the device fiber such that a number of coupled microstructures (such as ring resonators) may be formed.

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Номер записи: 9
13-09-2012 дата публикации

Signal light monitoring apparatus, optical amplification apparatus and optical reception apparatus, and signal light monitoring method

Номер: US20120230682A1
Автор: George Ishikawa, Kentaro Nakamura, Masahiro Yuki
Принадлежит: Fujitsu Ltd

According to an aspect of an embodiment, an apparatus includes an optical branching unit for branching an input signal light in four directions, a polarization component extraction unit extracting four polarization components having mutually different polarization parameters from lights branched in four directions by the optical branching unit, and a determination unit determining input/non-input of the signal light based on the four polarization components extracted by the polarization component extraction unit.

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Номер записи: 10
20-09-2012 дата публикации

Filtered fiber optic probe

Номер: US20120236303A1
Автор: Eric T. Marple, Kirk D. Urmey
Принадлежит: Marple Eric T, Urmey Kirk D

The invention provides improved multi-fiber, fiber optic probe assemblies in which the component parts are adapted for rapid assembly with precise alignment. Some embodiments are adapted to illuminate and collect light from a sample at a particular depth while minimizing interference arising from within the probe assembly itself. Also provided are methods for manufacturing the probe assemblies and optical apparatuses including the probe assemblies.

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Номер записи: 11
27-09-2012 дата публикации

Optical waveguide device and optical hybrid circuit

Номер: US20120243827A1
Автор: Seok-Hwan JEONG
Принадлежит: Fujitsu Ltd

The optical waveguide device includes a first optical coupler which branches input light and outputs first signal light and second signal light, an optical phase shifter including a first and a second optical waveguides of optical path lengths different from each other and giving a phase difference between the first signal light and the second signal light, and the second optical coupler coupling the first signal light outputted from the first optical waveguide and the second signal light outputted from the second optical waveguide. The first optical waveguide and the second optical waveguide have the same waveguide width and have optical waveguides bent with substantially the same radius of curvature.

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Номер записи: 12
11-10-2012 дата публикации

Device and Method for Optical Beam Combination

Номер: US20120257902A1
Автор: LI Zeng, Qi Deng, Xiaolu SONG, Yaohui Xie
Принадлежит: FutureWei Technologies Inc

An optical apparatus includes a first beam combining device arranged to receive a first optical beam having a first wavelength at a first location and a second optical beam output having a second wavelength at a second location. The second optical beam has a polarization that is substantially orthogonal to a polarization of the first optical beam. The first beam combining device configured to output a first combined beam that comprises a combination of the first optical beam and the second optical beam. An optical element is arranged to receive the first combined beam and a second combined beam and to transmit an output beam that includes a combination of the first combined beam and the second combined beam.

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Номер записи: 13
08-11-2012 дата публикации

Method and apparatus for measuring fiber twist by polarization tracking

Номер: US20120281205A1
Автор: Charles G. Askins
Принадлежит: US Department of Navy

A method of measuring fiber twist in a multi-core optical fiber bearing an FBG with polarization dependent reflectivity. The state of polarization of the launched light is adjusted until the reflected FBG wavelength is maximal, indicating that light reaching the FBG is linearly polarized, and the polarization axis of the light reaching the FBG is aligned with the slow birefringent axis of the FBG; the SOP of launched light is now measured. Bending experienced by the fiber is measured conventionally, and birefringence produced by bending of the multi-core optical fiber is calculated. A candidate amount of twist between the launch location and the FBG is proposed, and the corresponding twist-induced birefringence is calculated. When calculations show that light with the launched SOP becomes linearly polarized and aligned with the FBG after traversing a fiber section with the calculated birefringences and proposed rotation, the amount of twist has been properly identified.

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Номер записи: 14
08-11-2012 дата публикации

Mach-Zehnder Wavelength Division Multiplexer Having Flat Passband and Low Crosstalk

Номер: US20120281949A1
Автор: Hung-Chih Lu, Jen-Inn Chyi
Принадлежит: National Central University

A Mach-Zehnder wavelength division multiplexer (WDM) is provided. The WDM has a short length with flat passband and low crosstalk. Since passband is flattened, crosstalk is reduced and length of the WDM is shortened, the WDN can be used for optical communication and optical interconnection in a single chip.

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Номер записи: 15
13-12-2012 дата публикации

Optical Device Assembly Having A Cavity That Is Sealed To Be Moisture-Resistant

Номер: US20120314289A1
Автор: Eric T. Green, Gary G. Fang, Mark A. Summa, Peter G. Wigley
Принадлежит: Individual

In one embodiment, an optical device assembly is provided. The optical device includes a housing with a moisture-resistant sealed cylindrical cavity in which first and second optical surfaces are optically coupled, the first optical surface being disposed on a first optical element that is within a first end of the cylindrical cavity and the second optical surface being disposed on a second optical element that is within a second end of the cylindrical cavity that is opposite the first end.

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Номер записи: 16
14-02-2013 дата публикации

Echelle grating with cyclic free-spectral range

Номер: US20130039661A1
Автор: Ashok V. Krishnamoorthy, Guoliang Li, Kannan Raj, Xuezhe Zheng, Ying Luo
Принадлежит: Oracle International Corp

An optical de-multiplexer (de-MUX) that includes an optical device that images and diffracts an optical signal using a reflective geometry is described, where a free spectral range (FSR) of the optical device associated with a given diffraction order abuts FSRs associated with adjacent diffraction orders. Moreover, the channel spacings within diffraction orders and between adjacent diffraction orders are equal to the predefined channel spacing associated with the optical signal. As a consequence, the optical device has a comb-filter output spectrum, which reduces a tuning energy of the optical device by eliminating spectral gaps between diffraction orders of the optical device.

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Номер записи: 17
14-03-2013 дата публикации

Wavelength division multiplexing device

Номер: US20130064507A1
Автор: Duane Louderback, Mitchell HARRIS, Sven Mahnkopf
Принадлежит: Individual

A technology for wavelength division multiplexing light of a plurality of different wavelengths into one or more optical fibers is disclosed. In a first main embodiment, the light is multiplexed and turned by a designated angle using two lens arrays and a flat surface that functions as a mirror. In a second embodiment, a waveguide-based combiner structure multiplexes and turns a plurality of light beams of different wavelengths.

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Номер записи: 18
09-05-2013 дата публикации

Optical wavelength dispersion device and method of manufacturing the same

Номер: US20130114928A1
Автор: Cheng-Hao KO
Принадлежит: Photon Chip Inc

An optical wavelength dispersion device includes a first substrate, an input unit formed on the first substrate having a slit for receiving an optical signal, a grating formed on the first substrate for producing a first light beam form the optical signal for outputting, and a second substrate covered on the top of the input unit and the grating, wherein the input unit and the grating are formed from a photo-resist layer by high energy light source exposure.

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Номер записи: 19
06-06-2013 дата публикации

Method of detecting an acceleration

Номер: US20130141729A1
Автор: Gordon S. Kino, Michel J.F. Digonnet, Olav Solgaard, Onur Kilic
Принадлежит: Leland Stanford Junior University

A method detects an acceleration. The method includes providing a spatial mode filter positioned such that light emitted from the spatial mode filter is reflected by at least a portion of a reflective surface. The spatial mode filter and the portion of the reflective surface form an optical resonator having an optical resonance with a resonance lineshape. The method further includes emitting light from the spatial mode filter and irradiating the portion of the reflective surface. The portion of the reflective surface is responsive to acceleration of the optical resonator by changing curvature. The method further includes measuring a change of the resonance lineshape due to the acceleration of the optical resonator.

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Номер записи: 20
13-06-2013 дата публикации

BIDIRECTIONAL WAVELENGTH CROSS CONNECT ARCHITECTURES USING WAVELENGTH ROUTING ELEMENTS

Номер: US20130148923A1
Автор: Barthel Dirk, Bortolini Edward J., Silveira Paulo E., Weaver Samuel Paul, Weverka Robert T.
Принадлежит: Altera Corporation

Bidirectional wavelength cross connects include a plurality of ports, each configured to receive an input optical signals, each input optical signal having a plurality of spectral bands. At least one of the plurality of ports is disposed to simultaneously transmit an output optical signal having at least one of the spectral bands. A plurality of wavelength routing elements are configured to selectively route input optical signal spectral bands to output optical signals. 111-. (canceled)12. A method for routing spectral bands of optical signals using an optical system , the method comprising:receiving, by a first routing element in the optical system, a plurality of input spectral bands;receiving, by a second routing element in the optical system, one or more add spectral bands;optically combining, by a third routing element in the optical system, at least one of the plurality of input spectral bands and the one or more add spectral bands to create an express optical signal; andoutputting the express optical signal from the optical system, wherein the express optical signal is output from the first routing element and includes the at least one of the plurality of input spectral bands received at the first routing element.13. The method of claim 12 , further comprising optically dropping one or more of the plurality of input spectral bands as one or more drop spectral bands.14. The method of claim 13 , wherein the one or more drop spectral bands are output via the second routing element of the optical system claim 13 , wherein the second routing element also receives the one or more add spectral bands.15. The method of claim 14 , further comprising:transmitting the one or more add spectral bands from the second routing element to the third routing element; andreceiving the one or more drop spectral bands at the second routing element from the third routing element.16. The method of claim 12 , further comprising:receiving, at a fourth routing element from the third ...

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Номер записи: 21
01-08-2013 дата публикации

Multiple Optical Channel Autocorrelator Based on Optical Circulator

Номер: US20130194580A1
Автор: Ai Zhou, Jun Yang, Libo Yuan
Принадлежит: Harbin Engineering University

A multiple optical channel autocorrelator based on an optical fiber circulator includes a broad-band light source, at least an optical-fiber sensor array, an adjustable multiple light beams generator, at least an optical fiber circulator and at least a photoelectric detector. The optical-fiber sensor array is composed of the sensing fibers connected end to end. The online mirrors are formed by the connecting end faces of the adjacent fibers. The adjustable multiple light beams generator includes a fixed arm and an adjustable arm. The optical path difference between the fixed arm and the adjustable arm is adjustable in order to match the optical path of each sensor in the sensor array. The optical fiber circulator couples the signals generated by the multiple light beams generator to the sensor array, and couples the signals returned by the sensor array to the photoelectric detector. The photoelectric detector is connected to the optical fiber circulator. The multiple optical channel autocorrelator based on the optical fiber circulator can implement the real-time online measurement of the physical quantity of multipoint strain or deformation, and has advantages of low light source power loss, high efficiency and good stability.

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Номер записи: 22
29-08-2013 дата публикации

Microbubble optical resonator

Номер: US20130219970A1
Автор: Mikhail Sumetsky
Принадлежит: OFS FITEL LLC

An optical microresonator is configured as an optical microbubble formed along a section of an optical microcapillary. The curvature of the outer surface of the microbubble creates an optical resonator with a geometry that encourages the circulating WGMs to remain confined in the central region of the bubble, creating a high Q optical resonator. The resonator may be tuned by modifying the physical properties of the microbubble, allowing the resonator to be used as an optical filter. The resonator may also be used as a sensor or laser by introducing the material to be sensed (or the active laser material) into the microcapillary along which the microbubble is formed.

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Номер записи: 23
29-08-2013 дата публикации

Methods and Apparatus for Constructing Large Wavelength Selective Switches Using Parallelism

Номер: US20130223794A1
Автор: Mark E. Boduch
Принадлежит: Tellabs Operations Inc

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

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Номер записи: 24
19-09-2013 дата публикации

Optical beam sweeper

Номер: US20130242400A1
Автор: Long Chen
Принадлежит: Alcatel Lucent SAS

An optical device, comprising an optical device, comprising an optical beam sweeper that includes a multi-wavelength laser source and an optical power splitter. The optical power splitter has an optical input optically coupled to the multi-wavelength laser source, the optical power splitter having N optical outputs, each optical output connected by a corresponding optical pathway of a parallel array to an optical output surface of the optical beam sweeper. N parallel optical paths connect the optical input to the optical output surface, each optical path including a corresponding one the optical pathways and having a different optical path length than the one or more other optical paths, the optical path lengths differing in a wavelength-dependent way.

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Номер записи: 25
14-11-2013 дата публикации

Dynamic Terahertz Switching Device Comprising Sub-wavelength Corrugated Waveguides and Cavity that Utilizes Resonance and Absorption for Attaining On and Off states

Номер: US20130301983A1
Автор: Kyungjun Song, Pinaki Mazumder
Принадлежит: Individual

A terahertz (THz) switch consisting of perfect conductor metamaterials is discussed in this invention. Specifically, we have built a THz logic block by combining two double-sided corrugated waveguides capable of slowing down the electromagnetic waves in the THz regime with a sub-wavelength cavity, having one or more grooves with shorter height than the grooves of the periodic corrugated waveguide. This new type of THz structure is called as the waveguide-cavity-waveguide (WCW). The new invention is based on our mathematical modeling and experimentation that confirms a strong electromagnetic field accumulation inside the tiny cavity which can confine EM field for a long time within a very small effective volume (V eff ) to provide high quality (Q) factor. Therefore, an efficient THz switch can be designed to achieve ON-OFF switching functionality by modulating the refractive index n or extinction coefficient α inside the switching junction. The dimensions of the periodic structure and cavity can be optimized to apply the invention to slow-EM wave devices working at other frequencies in the EM spectrum including the microwave and outside the THz domain which is generally accepted as from 0.3 THz to 3 THz.

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Номер записи: 26
14-11-2013 дата публикации

Optical multiplexer / demultiplexer

Номер: US20130302032A1
Автор: Osamu Shimakawa
Принадлежит: Sumitomo Electric Industries Ltd

An optical multiplexer/demultiplexer includes a first fiber unit having an MCF and a GRIN lens, a second fiber unit having an MCF and a GRIN lens, and an optical filter. The optical filter is disposed between the GRIN lens of the first fiber unit and the GRIN lens of the second fiber unit and makes transmitted light and reflected light emitted from a core of the MCFs incident on a core of the MCFs. A leading end of the MCF and one end of the GRIN lens are held in contact with each other in the first fiber unit, while a leading end of the MCF and one end of the GRIN lens are held in contact with each other in the second fiber unit.

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Номер записи: 27
02-01-2014 дата публикации

RECONFIGURABLE OPTICAL NETWORKS

Номер: US20140003810A1
Автор: Bernasconi Pietro, Chen Young-Kai, Dong Po, Neilson David T.
Принадлежит:

A system, e.g. a reconfigurable optical channel router, includes an input waveguide optically connected to a wavelength demultiplexer. A first input microcavity resonator set including a plurality of microcavity resonators is located adjacent the input waveguide. The microcavity resonators are configured to controllably couple to a corresponding one of a plurality of frequency channels of an optical signal propagating within said input waveguide. 1. A system comprising:a first plurality of separate sets of optical ring resonators;a second plurality of separate sets of optical ring resonators; andan optical multiplexer/demultiplexer having a set of optical inputs and a set of optical outputs; and wherein:each set of the first plurality of separate sets is optically connected to a corresponding one of the optical inputs of the optical multiplexer/demultiplexer; andeach set of the second plurality of separate sets is optically connected to a corresponding one of the optical outputs of the optical multiplexer/demultiplexer.2. The system of claim 1 , further comprising a plurality of first devices claim 1 , each first device being connected to modulate digital data streams onto optical carriers via the ring resonators of a corresponding one of the sets of the first plurality.3. The system of claim 2 , further comprising a plurality of first apparatuses claim 2 , each first apparatus being connected to demodulate digital data streams from optical carriers via the ring resonators of a corresponding one of the sets of the second plurality.4. The system of claim 1 , further comprising a plurality of first apparatuses claim 1 , each first apparatus being connected to demodulate digital data streams from optical carriers via the ring resonators of a corresponding one of the sets of the second plurality.5. The system of claim 1 , further comprising an electronic controller capable of separately adjusting resonant frequencies of some of the ring resonators of the sets of the ...

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Номер записи: 28
16-01-2014 дата публикации

Wavelength selective optical switch

Номер: US20140016079A1
Автор: Yasuki Sakurai
Принадлежит: Santec Corp

A wavelength selective optical switch includes an incidence/emergence unit that includes an input port at which signal light made up of light of numerous wavelengths is incident and an output port at which light signals of selected wavelengths are emergent, a wavelength dispersion element that spatially disperses signal light according to a wavelength of the signal light, and synthesizes reflected light, a condenser element that condenses light dispersed by the wavelength dispersion element on a two-dimensional plane, a space phase modulator arranged so as to receive incident light deployed on an xy plane made up of an x-axis direction deployed according to wavelength and a y-axis direction orthogonal to the x-axis direction, and having numerous pixels arranged in a lattice on the xy plane, and a space phase modulator drive unit.

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Номер записи: 29
16-01-2014 дата публикации

Optical unit and wavelength selective switch

Номер: US20140016209A1
Автор: Manabu Shiozaki, Satoshi Yoshikawa
Принадлежит: Sumitomo Electric Industries Ltd

In a wavelength selective switch, a holding member is used to rotate one end of optical fibers and a collimator array around a rotation axis to thereby change an incident angle of collimated light with respect to incident surfaces of a beam expander optical system. When the incident angle of the collimated light on the beam expander optical system is changed, an amount of variation in an emission angle of light from the beam expander optical system is not proportional (inversely proportional) to the magnification of the beam expander optical system. Thus, this wavelength selective switch can easily fine-tune the incident position (beam position) of light with respect to each reflecting surface of a MEMS mirror by rotating the holding member.

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Номер записи: 30
20-02-2014 дата публикации

Sagnac interferometer event sensing and locating device

Номер: US20140050473A1
Автор: Mike McNeilly, Scott V. Johnson
Принадлежит: Cleveland Electric Laboratories Co

A Sagnac interferometer event sensing device is disclosed herein. The device includes a first light source operable to emit a first light beam. The device also includes a second light source operable to emit a second light beam. The device also includes an optical fiber path including a first portion along which only the first light beam travels, a second portion along which only the second light beam from the second light source travels, and a third portion along which both of the first and second light beams travel. The device also includes a first detector disposed at an end of the first portion of the optical fiber path to receive the first light beam. The device also includes a second detector disposed at an end of the second portion of the optical fiber path to receive the second light beam. The device also includes a first plurality of depolarizers disposed along the first portion of the optical fiber path. The device also includes a second plurality of depolarizers disposed along the second portion of the optical fiber path. The first and second light beams are at first and second, different characteristic wavelengths.

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Номер записи: 31
06-03-2014 дата публикации

Polarization diverse demultiplexing

Номер: US20140064729A1
Автор: Douglas M. Gill, Solomon Assefa, William M. Green
Принадлежит: International Business Machines Corp

An optical demultiplexing device includes a first portion operative to receive an input optical signal having a first polarization, a second polarization and multiple channels, and split the input optical signal into a first optical signal having the first polarization and a second optical signal having the first polarization, and an optical demultiplexing portion communicatively connected to the polarization splitter portion, the optical demultiplexing portion operative to receive a combination of the first optical signal and the second optical signal, and output each channel of the first optical signal and the second optical signal to a photodetector device corresponding to each channel.

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Номер записи: 32
13-03-2014 дата публикации

Optical Multiplexer/Demultiplexer

Номер: US20140072260A1
Автор: Korwan David J., Targove James D., Wein Steven J.
Принадлежит: BAE Systems Information and Electronic Systems Integration Inc.

An apparatus for optical spectrometry utilizes a simplified construction, reducing the number of independent optical elements needed while providing a sizeable dispersed spectrum. The apparatus provides a spectral intensity distribution of an input source wherein individual spectral components in the source can be measured and, in some embodiments, can be manipulated or filtered. 1. A compact optical multiplexer/demultiplexer system , comprising:a grating and a two element optical system in which a focal length of said optical system is minimized over a single lens such that a round trip optical path is contained within a compact optical footprint, said optical system operating near Littrow and exhibiting telecentricity, said optical system providing that light comes in and goes out from a common direction.2. The compact optical multiplexer/demultiplexer system of claim 1 , wherein the optical footprint of said compact design is on the order of 6×8 inches.3. The compact optical multiplexer/demultiplexer system of claim 1 , wherein said apparatus includes two optical elements claim 1 , one of said optical elements providing a collimating function at one reflective surface thereof claim 1 , with both of said optical elements providing a telescope focusing function that provides said telecentricity.4. The compact optical multiplexer/demultiplexer system of claim 3 , wherein the light reflected from one of said optical elements collimates light onto said grating and wherein diffracted light exits in nearly the same direction as the collimated light claim 3 , thus to establish the Littrow condition.5. The compact optical multiplexer/demultiplexer system of claim 3 , wherein said optical multiplexer/demultiplexer has an optical centerline and wherein said grating is to one side of said centerline. This is a divisional application of U.S. application Ser. No. 12/812,615 and claims rights under 35 USC §119(e) from U.S. Application Ser. No, 61/113,377 filed Nov. 11, 2008, ...

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Номер записи: 33
27-03-2014 дата публикации

Optical filter having single reflecting total internal reflection echelle grating filter and optical waveguide device including the same

Номер: US20140086531A1
Автор: Gyungock Kim, Jaegyu PARK, Sahnggi Park, Sang Gi Kim
Принадлежит: Electronics and Telecommunications Research Institute ETRI

An optical filter of the inventive concept includes a slab waveguide disposed on a substrate, an input guide gate and an output guide gate spaced apart from each other in the slab waveguide, and an echelle grating filter disposed in the slab waveguide. The echelle grating filter has curvature and extends in a first direction. The echelle grating filter has gratings of sawtooth shape on one surface thereof. Light inputted through the input guide gate is totally reflected at the echelle grating filter by one reflecting process.

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Номер записи: 34
03-04-2014 дата публикации

Laser Machining and Mechanical Control of Optical Microresonators

Номер: US20140090425A1
Автор: "DelHaye Pascal", Diddams Scott, Papp Scott
Принадлежит: The United States of America as represented by the Secretary of Commerce

An apparatus and technique are used to fabricate optical microresonators. A fabrication chamber contains all fabrication materials and devices. The microresonators are fabricated from a glass preform mounted on a motorized spindle. A laser is focused onto the preform to partly or fully impinge on the preform. The laser's focus position is controlled by changing the positioning of a lens mounted on a translation stage. Piezoelectric control elements may be mounted to finished microresonators to control of nonlinear parametric oscillation and four-wave mixing effects of the microresonator, control of nonlinear optical stimulated Brillouin scattering and Raman effects of said microresonator and wideband tuning of the frequency spacing between the output modes of a nonlinear-Kerr-effect optical frequency comb generated with said microresonator. 1. An apparatus for the fabrication of an optical microresonator comprised of: a motorized rotating spindle;', 'a preform of glass mounted to said motorized rotating spindle;', {'sub': 1', '1', '1, 'a fabrication laser emitting a fabrication laser beam having a first beam diameter D, a first horizontal position Xand a first vertical position Y, wherein said laser beam partly or fully impinges on said glass preform;'}, {'sub': 1', 'n', '1', '1', '1', 'n', 'n', 'n', 'n, 'a movable focusing lens having a first focusing lens position Pos, wherein said movable focusing lens is movable along at least one axis perpendicular to said laser along a plurality of subsequent positions Posand wherein D, Xand Yare altered proportionately to D, Xand Yfor each of said plurality of positions Pos; and'}, 'at least one computer processing component adapted to take measurements of a shape of said glass preform wherein said laser beam partly or fully impinges on said glass preform., 'a fabrication chamber containing2. The apparatus of claim 1 , wherein said computer processing component is operatively coupled with a magnifying lens and camera which ...

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Номер записи: 35
10-04-2014 дата публикации

High-density fiber coupling and emission/detection system

Номер: US20140099124A1
Автор: Benoit Sevigny
Принадлежит: Applied Micro Circuits Corp

An optical system including an array of photonic devices that convert light signals to electrical signals or electrical signals to light signals are coupled together and optically coupled to an array of optic fibers of an information channel. A lens couples optical beams generated to at least one array of photonic devices and the array of optic fibers for an optical communication there-between. The array of photonic devices and the array of optic fibers are respectively arranged in a honeycomb configuration.

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Номер записи: 36
06-01-2022 дата публикации

INTERFEROMETER FILTERS WITH COMPENSATION STRUCTURE

Номер: US20220003928A1
Автор: Dudley Eric, RAVI Koustuban, Thompson Mark
Принадлежит: Psiquantum, Corp.

A Mach-Zehnder interferometer (MZI) filter comprising one or more passive compensation structures are described. The passive compensation structures yield MZI filters that are intrinsically tolerant to perturbations in waveguide dimensions and/or other ambient conditions. The use of n+1 waveguide widths can mitigate n different sources of perturbation to the filter. The use of at least three different waveguide widths for each Mach-Zehnder waveguide can alleviate sensitivity of filter performance to random width or temperature variations. A tolerance compensation portion is positioned between a first coupler section and a second coupler section, wherein the tolerance compensation portion includes a first compensation section having a second width, a second compensation section having a third width and a third compensation section having a fourth width, wherein the fourth width is greater than the third width and the third width is greater than the second width. 1. (canceled)2. An optical filter comprising:a first waveguide including a first region extending between a first coupler section and a second coupler section, and a second region extending between the second coupler section and a third coupler section; anda second waveguide including:a first portion extending between the first coupler section and the second coupler section, the first portion including at least two compensation sections that sequentially increase in width; anda second portion extending between the second coupler section and the third coupler section, the second portion including at least two compensation sections that sequentially increase in width.3. The optical filter of wherein the first claim 2 , second and third coupler sections and the first and second waveguides comprise a Mach-Zehnder interferometer (MZI) filter.4. The optical filter of wherein the first portion includes at least three compensation sections that sequentially increase in width.5. The optical filter of wherein the ...

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Номер записи: 37
06-01-2022 дата публикации

OPTICAL SCANNER

Номер: US20220003933A1
Автор: DIEPPEDALE Christel, FANGET Stephane, Fowler Daivid, MOLLARD Laurent
Принадлежит: Commissariat A L'Energie Atomique Et Aux Energies Alternatives

The present invention relates to a scanner provided with a plurality of elementary scanners each able to scan a different surface by means of a light beam. 1. Optical scanner that comprises:a support having a first plane face;at least one optical source able to emit a main optical beam with a wavelength λ;a plurality of elementary scanners that each comprise:a beam that comprises a movable part and a fixed part, said fixed part resting on the first face;a plurality of waveguides disposed on or in the movable part and intended to divide the main optical beam into a plurality of secondary optical beams;a phase-control optical array that comprises a plurality of optical phase shifters each coupled to a waveguide, disposed on or in an emission section of the movable part and which extends from a free end of the beam opposite to a fixed end; the movable part of at least one of the beams has, at rest, a deflection different from the deflections at rest of the movable parts of the other beams.2. Optical scanner according to claim 1 , wherein the movable parts of each of the beams all have claim 1 , at rest claim 1 , a different deflection.3. Optical scanner according to claim 1 , wherein each beam comprises claim 1 , from a first face towards a second face parallel to the first face claim 1 , a first layer claim 1 , a second layer and a third layer claim 1 , the deflection of movable part of each of the beams being imposed by a stress level of one or other or both of the first layer and of the third layer claim 1 , advantageously the stress level of one or other or both of the first layer and the third layer is a function of the thickness of the layer concerned.4. Optical scanner according to claim 3 , wherein the first layer and the third layer each comprise a dielectric material claim 3 , advantageously the dielectric material comprises silicon dioxide.5. Optical scanner according to claim 1 , wherein each optical phase shifter comprises a diffraction grating coupled to ...

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Номер записи: 38
01-01-2015 дата публикации

Beam Combiner

Номер: US20150003773A1
Автор: Bulthuis Hendrik F., Dekker Ronald, Klein Edwin Jan
Принадлежит:

A beam combiner is disclosed that comprises a planar lightwave circuit that is based on undoped silicon nitride-based surface waveguides, wherein the planar lightwave circuit comprises a plurality of input ports, a mixing region, and an output port, and wherein the mixing region comprises a plurality of directional couplers that are arranged in a tree structure. Embodiments of the present invention are capable of combining a plurality of light signals characterized by disparate wavelengths on irregular spacings with low loss. Further, the present invention enables high-volume, low cost production of beam combiners capable of combining three or more light signals into a single composite output beam. 1. A beam combiner that includes a planar lightwave circuit , the planar lightwave circuit comprising:a plurality of input ports, the plurality of input ports including a first input port;a mixing region, the mixing region comprising a plurality of directional couplers that are arranged in a first arrangement comprising a tree structure;a first output port that is optically coupled with the plurality of input ports via the mixing region;a first polarization filter that is optically coupled with the first input port, the first polarization filter being dimensioned and arranged to (1) receive a first light signal that comprises a first polarization mode and a second polarization mode and (2) selectively reduce the magnitude of the first polarization mode.2. The beam combiner of wherein the plurality of directional couplers comprises:a first directional coupler that is dimensioned and arranged to enable a first light signal in a first waveguide to substantially completely couple into a second waveguide and substantially disable a second light signal in the second waveguide from coupling into the first waveguide;a second directional coupler that is dimensioned and arranged to enable a third light signal in a third waveguide to substantially completely couple into a fourth ...

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Номер записи: 39
05-01-2017 дата публикации

Backside binary grated lens coupled to front side waveguide

Номер: US20170003452A1
Автор: Ashleigh R. KREIDER, Brennan J. Brown, John J. Ellis-Monaghan, Yoba Amoah
Принадлежит: International Business Machines Corp

A wafer structure includes a diffractive lens disposed on a backside of a wafer and coupled to a front side waveguide, the diffractive lens being configured to receive light and focus the light to the front side waveguide.

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Номер записи: 40
07-01-2016 дата публикации

OPTICAL FIBER FLEXIBLE MULTI-WAVELENGTH FILTER AND METHOD OF CONTROLLING WAVELENGTH OF SPECTRUM USING THE SAME

Номер: US20160004013A1
Автор: Lee Yong Wook, PARK Kyoung Soo
Принадлежит:

An optical fiber flexible multi-wavelength filter based on a polarization-diversity loop includes a pair of high-birefringence optical fibers, a polarization beam splitter connected to the pair of high-birefringence optical fibers and dividing light incident from a broadband light source into two polarized beams, and a polarization controller connected to the high-birefringence optical fibers or the polarization beam splitter and controlling the two polarized beams divided by the polarization beam splitter. The polarization controller includes a ½ wave plate or a ¼ wave plate, and the polarization controller disposed between the high-birefringence optical fibers controls an angle difference between principal axes of the high-birefringence optical fibers and visibility. Interference in the high-birefringence optical fibers is controlled via changing polarized light incident from the broadband light source using the polarization controller. 1. An optical fiber flexible multi-wavelength filter based on a polarization-diversity loop , comprising:a pair of high-birefringence optical fibers;a polarization beam splitter connected to the pair of high-birefringence optical fibers and dividing light incident from a broadband light source into two polarized beams; anda polarization controller connected to the high-birefringence optical fibers or the polarization beam splitter and controlling the two polarized beams divided by the polarization beam splitter,wherein the polarization controller includes a ½ wave plate or a ¼ wave plate, and the polarization controller disposed between the high-birefringence optical fibers controls an angle difference between principal axes of the high-birefringence optical fibers and visibility, andinterference in the high-birefringence optical fibers is controlled by changing polarized light incident from the broadband light source using the polarization controller.2. The optical fiber flexible multi-wavelength filter of claim 1 , wherein the ...

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Номер записи: 41
02-01-2020 дата публикации

ADIABATIC POLARIZATION ROTATOR COMBINER

Номер: US20200003953A1
Автор: Mahgerefteh Daniel, Park Bryan, Poon Joyce Kai See, Yong Zheng
Принадлежит:

A system may include a polarization rotator combiner. The polarization rotator combiner may include a first stage, a second stage, and a third stage. The first stage may receive a first component of light with a TE00 polarization and a second component of light with the TE00 polarization. The first stage may draw optical paths of the first and second components together. The second stage may receive the first component and the second component from the first stage. The second stage may convert the polarization of the second component from the TE00 polarization to a TE01 polarization. The third stage may receive the first component and the second component from the second stage. The third stage may convert polarization of the second component from the TE01 polarization to a TM00 polarization. The third stage may output the first component and output the second component. 1. A system comprising: [ receive a first component of light with a TE00 polarization in a first input of the PRC and receive a second component of light with the TE00 polarization in a second input of the PRC;', 'output the first component with the TE00 polarization via a first intermediate output; and', 'output the second component with the TE00 polarization via a second intermediate output different than the first intermediate output, wherein a distance between the first and second intermediate output is less than a distance between the first and second input;, 'a first stage configured to, receive from the first stage the first component with the TE00 polarization and the second component with the TE00 polarization;', 'convert the polarization of the second component from the TE00 polarization to a TE01 polarization; and', 'output the first component with the TE00 polarization and the second component with the TE01 polarization;, 'a second stage configured to, receive from the second stage the first component with the TE00 polarization and the second component with the TE01 polarization;', ' ...

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Номер записи: 42
02-01-2020 дата публикации

Method and System to Passively Align and Attach Fiber Array to Laser Array or Optical Waveguide Array

Номер: US20200003955A1
Автор: FANTO Michael, Kulick Jason M., Lu Tian, PREBLE Stefan, Qian Yi, STEIDLE Jeffrey
Принадлежит:

Disclosed is a method and system for passively aligning optical fibers (), a first waveguide array (), and a second waveguide array () using chip-to-chip vertical evanescent optical waveguides () and (), that can be used with fully automated die bonding equipment. The assembled system () can achieve high optical coupling and high process throughput for needs of high volume manufacturing of photonics, silicon photonics, and other applications that would benefit from aligning optical fibers to lasers efficiently. 1. A method comprising:(a) providing a first waveguide having a tapered end;(b) providing a second waveguide having a tapered end;(c) positioning the tapered ends of the first and second waveguide overlapping in spaced parallel or substantially parallel relation;(d) providing an optical fiber positioned in optical alignment with an end of the second waveguide opposite the tapered end;(e) propagating light toward the tapered end of the first waveguide producing evanescent light that is received by the tapered end of the second waveguide;(f) propagating evanescent light received by the tapered end of the second waveguide through the second waveguide; and(g) transferring the light propagating through the second waveguide to the optical fiber.2. The method of claim 1 , wherein the tapered ends of the first and second waveguide overlapping in spaced substantially parallel relation have their longitudinal axes aligned ±2°.3. The method of claim 1 , wherein the tapered ends of the first and second waveguide overlap by 300 micrometers±30 micrometers.4. The method of claim 1 , wherein:the optical fiber is disposed on a first substrate having a first end including interconnect nodules; andthe first waveguide is disposed on a second substrate having a first end including interconnect nodules, wherein:the method further includes positioning the interconnect nodules on the first ends of the first and second substrates in contact with or mating with each other. This ...

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Номер записи: 43
02-01-2020 дата публикации

OPTICAL FILTER AND OPTICAL TRANSMISSION DEVICE

Номер: US20200003957A1
Автор: Hasegawa Makoto
Принадлежит: FUJITSU LIMITED

An optical filter includes a spectroscopic element configured to disperse input light, and emit the dispersed input light as spectrum light; and an optical fiber including an end face having a recess, a core having a first face in contact with a bottom of the recess and a second face sandwiched between the first face and a circumference end of the recess, and a clad surrounding the core, wherein in the optical fiber, the recess is irradiated with the spectrum light, the second face is inclined such that a second portion incident from the second face to the core out of the irradiated spectrum light is emitted to the clad, and a first portion incident from the first face to the core out of the irradiated spectrum light is outputted. 1. An optical filter comprising:a spectroscopic element configured to disperse input light, and emit the dispersed input light as spectrum light; andan optical fiber including:an end face having a recess;a core having a first face in contact with a bottom of the recess and a second face sandwiched between the first face and a circumference end of the recess; anda clad surrounding the core,wherein in the optical fiber,the recess is irradiated with the spectrum light,the second face is inclined such that a second portion incident from the second face to the core out of the irradiated spectrum light is emitted to the clad, anda first portion incident from the first face to the core out of the irradiated spectrum light is outputted.2. The optical filter according to claim 1 , wherein a part of the second portion is refracted on an interface between the core and the clad and emitted to the clad claim 1 , and other part of the second portion is reflected on the interface.3. The optical filter according to claim 1 , wherein the circumference end overlaps a boundary between the clad and the core on the end face claim 1 , or surrounds the boundary.4. The optical filter according to claim 1 , wherein the recess is hemispherical.5. The optical filter ...

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Номер записи: 44
02-01-2020 дата публикации

OPTICAL BRANCH MODULE

Номер: US20200003969A1
Автор: Kikuchi Takayuki, Nishimura Hidetomo, SATOU Fumiyasu, Yamashita Yuto
Принадлежит:

An optical branch module including a glass block, an input/output gradient index lens, an output gradient index lens, a beam splitter film, a mirror film, an input optical fiber, a first output optical fiber that extracts input light from the input optical fiber reflected by the beam splitter film as first output light, and a second output optical fiber that extracts light passed through the beam splitter film passed through the glass block, reflected by the mirror film, passed through the glass block again, and input from the other end of the output gradient index lens as second output light. 1. An optical branch module comprising:a glass block configured to transmit light;an input/output gradient index lens arranged at one end of the glass block and having a length of a quarter of a period of input light;an output gradient index lens arranged at one end of the glass block and having a length of a quarter of a period of input light;a beam splitter film arranged between the other end of the input/output gradient index lens and one end of the glass block and configured to transmit and reflect light at a constant rate;a mirror film arranged at the other end of the glass block and configured to reflect light;an input optical fiber connected to one end of the input/output gradient index lens and configured to input input light to the input/output gradient index lens;a first output optical fiber connected to a position, where the input light from the input optical fiber is converged after being reflected by the beam splitter film, at one end of the input/output gradient index lens and configured to extract the reflected light as first output light; anda second output optical fiber connected to a position, where the light passed through the beam splitter film is converged after passing through the glass block, being reflected by the mirror film, passing through the glass block again, and being input from the other end of the output gradient index lens, at one end of the ...

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Номер записи: 45
02-01-2020 дата публикации

Hermetic optical subassembly

Номер: US20200003974A1
Автор: Jeremy Burke, Rand Dannenberg, Robert Ryan Vallance
Принадлежит: Cudoquanta Florida Inc

A hermetic optical subassembly includes an optical bench having a mirror directing optical signals to/from an optical waveguide, a carrier supporting a photonic device, and an intermediate optical bench having a mirror directing optical signals between the photonic device and the optical bench. The optical bench and the intermediate optical bench optically aligns the photonic device to the waveguide along a desired optical path. In one embodiment, the photonic device is an edge emitting laser (EML). The mirror of the optical bench may be passively aligned with the mirror of the intermediate optical bench. The assembled components are hermetically sealed. The body of the optical benches are preferably formed by stamping a malleable metal material to form precise geometries and surface features. In a further aspect, the hermetic optical subassembly integrates a multiplexer/demultiplexer, for directing optical signals between a single optical fiber and a plurality of photonic devices.

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Номер записи: 46
07-01-2021 дата публикации

Photonic Integrated Circuit Outcoupling Array for Imaging-Based Beam Steering

Номер: US20210003784A1
Автор: Renshaw Christopher, Saghaye Polkoo Sajad
Принадлежит:

A coupler array device may include an array of couplers arranged in a coupler plane, where each of the couplers couples light between the coupler plane and one or more directions outside of the coupler plane. A coupler array device may further include a pixel switch network to selectively couple light into or out of a selected subset of the plurality of couplers, where the pixel switch network may include one or more pixel-network waveguides and pixel-network switches to couple light between couplers and pixel-network waveguides. The coupler array device may further include one or more feed networks including a feed-line waveguide and one or more feed-network switches to couple light between the feed-line waveguide and at least some of the pixel-network waveguides. Light may be routable between selected couplers and selected feed-line waveguides along selected paths by controlling the pixel-network switches and the feed-network switches along the selected paths. 1. A coupler array device comprising:a plurality of couplers arranged in a coupler plane, wherein each of the plurality of couplers is configured to couple light between the coupler plane and one or more directions outside of the coupler plane; one or more pixel-network waveguides; and', 'a plurality of pixel-network switches, wherein each of the plurality of pixel-network switches is configured to selectively couple light between one of the plurality of couplers and one of the one or more pixel-network waveguides; and, 'a pixel switch network to selectively couple light into or out of a selected subset of the plurality of couplers, wherein the pixel switch network comprises a feed-line waveguide; and', 'one or more feed-network switches to selectively couple light between the feed-line waveguide and at least some of the plurality of pixel-network waveguides, wherein light is routable between selected couplers of the plurality of couplers and selected feed-line waveguides of the one or more feed networks ...

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Номер записи: 47
03-01-2019 дата публикации

OPTICAL ARRANGEMENT FOR MANAGING DIVERSITY AND ISOLATION BETWEEN PORTS IN A WAVELENGTH SELECTIVE SWITCH

Номер: US20190004250A1
Автор: Ishikawa Takaaki, Soccolich Carl Edmund, Wagener Jefferson L.
Принадлежит:

An optical device includes an optical port array, an optical arrangement, a dispersion element, a focusing element and a programmable optical phase modulator. The optical port array has at least one optical input port for receiving an optical beam and a plurality of optical output ports. The optical arrangement allows optical coupling between the input port and each of the output ports and prevents optical coupling between any one of the plurality of optical output ports and any other of the plurality of optical output ports. The dispersion element receives the optical beam from the input port after traversing the optical arrangement and spatially separates the optical beam into a plurality of wavelength components. The focusing element focuses the plurality of wavelength components. The programmable optical phase modulator receives the focused plurality of wavelength components and steers them to a selected one of the optical outputs. 1. An optical device , comprising:an optical port array having at least one optical input port for receiving an optical beam and a plurality of optical output ports;an optical arrangement for allowing optical coupling between the at least one optical input port and each of the optical output ports and preventing optical coupling between any one of the plurality of optical output ports and any other of the plurality of optical output ports;a dispersion element receiving the optical beam from the at least one optical input after traversing the optical arrangement and spatially separating the optical beam into a plurality of wavelength components;a focusing element for focusing the plurality of wavelength components; anda programmable optical phase modulator for receiving the focused plurality of wavelength components, the modulator being configured to steer the wavelength components to a selected one of the optical outputs.2. The optical device of claim 1 , wherein the optical arrangement is configured to selectively allow and prevent ...

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Номер записи: 48
13-01-2022 дата публикации

WAVELENGTH DEMULTIPLEXING DEVICE IN PARTICULAR FOR OUT-OF-PLANE DEMULTIPLEXING

Номер: US20220011516A1
Автор: Boutami Salim, MONPEURT Cyrielle
Принадлежит: Commissariat A L'Energie Atomique Et Aux Energies Alternatives

A wavelength demultiplexing device configured so as to spatially distributing the spectral contributions of an incident light beam, when in use, and which includes a linear waveguide and a planar waveguide, formed in a coplanar way and adapted to be optically coupled with one another along a coupling line, by evanescent coupling. Such a device may further include diffraction gratings located in the planar waveguide, to extract light out of the latter. 1. A wavelength demultiplexing device configured to spatially distribute the spectral contributions of an incident light beam when in use , wherein:a linear waveguide, adapted to perform an optical guidance along a guide line and over a use wavelength range; anda planar waveguide, adapted to perform an optical guidance in a guide plane and over said use wavelength range;with the linear waveguide and the planar waveguide formed in a coplanar way, and configured so as to be optically coupled with one another by evanescent coupling along a coupling line, when in use,a distance between the linear waveguide and the planar waveguide varying decreasingly, along the coupling line and in the direction of propagation of light in the linear waveguide, when in use.2. The device according to claim 1 , wherein the planar waveguide comprises a core layer an edge of which opposite the coupling line is bent upon itself so as to form an indentation claim 1 , and wherein the linear waveguide is bent upon itself claim 1 , and located inside the indentation formed in the planar waveguide.3. The device according to claim 1 , further comprising:an extraction assembly located in the planar waveguide, and consisting of a plurality of diffraction grating each configured to extract light out of the planar waveguide;with each of the diffraction gratings of the extraction assembly configured so as to extract light at a different wavelength called extraction wavelength.4. The device according to claim 3 , wherein the diffraction gratings of the ...

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Номер записи: 49
03-01-2019 дата публикации

WAVELENGTH-TUNABLE III-V/Si HYBRID OPTICAL TRANSMITTER

Номер: US20190004340A1
Автор: Krishnamoorthy Ashok V., Luo Ying, Yao Jin, Zheng Xuezhe
Принадлежит: ORACLE INTERNATIONAL CORPORATION

An optical transmitter includes a reflective semiconductor optical amplifier (RSOA) coupled to an input end of a first optical waveguide. An end of the first optical waveguide provides a transmitter output for the optical transmitter. Moreover, a section of the first optical waveguide between the input end and the output end is optically coupled to a ring modulator that modulates an optical signal based on an electrical input signal. A passive ring filter (or a 1×N silicon-photonic switch and a bank of band reflectors) is connected to provide a mirror that reflects light received from the second optical waveguide back toward the RSOA to form a lasing cavity. Moreover, the ring modulator and the passive ring filter have different sizes, which causes a Vernier effect that provides a large wavelength tuning range for the lasing cavity in response to tuning the ring modulator and the passive ring filter. 1. An optical transmitter , comprising:a reflective semiconductor optical amplifier (RSOA);a ring modulator that modulates an optical signal based on an electrical input signal;a first optical waveguide with an input end and an output end, wherein the input end is coupled to the RSOA, wherein the output end provides a transmitter output for the optical transmitter, and wherein a section of the first optical waveguide between the input end and the output end is optically coupled to the ring modulator;an array of N narrow-band reflectors, wherein each narrow-band reflector has a different center wavelength;a 1×N silicon-photonic switch, having an input port and N output ports, wherein each output port is coupled to a different narrow-band reflector in the array of N narrow-band reflectors;a second optical waveguide with a first end optically coupled to the ring modulator and a second end coupled to the input port of the 1×N silicon-photonic switch; andan adjustment mechanism that facilitates adjusting a frequency of the optical transmitter in discrete increments by ...

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Номер записи: 50
05-01-2017 дата публикации

Optical Channel Monitor With Integral Optical Switch

Номер: US20170005729A1
Автор: Bartolini Glenn, Cahill Michael, Jasapara Jayesh, Koeppen Christopher S.
Принадлежит: II-VI Incorporated

A multiport optical switch (such as an N×1 switch) is used to controllably select a specific incoming optical signal that is to be processed by an associated optical channel monitor (OCM). The OCM includes a tunable optical filter and photodetector arrangement, and is configured to measure the optical spectrum of the incoming optical signal and extract information associated with the various optical channels (wavelengths) forming the incoming optical signal (i.e., power, wavelength, OSNR and the like for each channel). The OCM also includes a signal processing component that generates a pair of output control signals, a first signal to control the wavelength scanning process of the tunable optical filter and a second signal to control the setting of the multiport optical switch. 1. An optical channel monitoring system comprising:a multiport optical switch including a plurality of input ports and a single output port, each input port receiving a separate optical input signal, with each separate optical input signal including a plurality of separate wavelength channels, the multiport optical switch controlled to selectively couple one input port from the plurality of input ports to the single output port;a tunable optical filter coupled to the single output port of the multiport optical switch for receiving the selected optical input signal, the tunable optical filter controlled to selectively pass different wavelength channels at different points in time;an optical photodetector coupled to the output of the tunable optical filter for converting each wavelength channel into an electrical signal equivalent; anda processor component responsive to the electrical signal equivalent for extracting optical characteristic data therefrom for monitoring the performance of the selected optical signal applied as an input to the tunable optical filter, the processor component further configured to generate a first control signal applied as an input to the multiport switch to ...

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Номер записи: 51
07-01-2016 дата публикации

OPTICAL ELEMENT, LIGHT TRANSMITTING DEVICE, AND LIGHT RECEIVING DEVICE

Номер: US20160006533A1
Автор: Jeong Seokhwan
Принадлежит:

An optical element includes: a first delayed interferometer; and a second delayed interferometer and a third delayed interferometer cascaded to the first delayed interferometer. The first delayed interferometer includes: a first optical coupler and a second optical coupler; a first waveguide between the first optical coupler and the second optical coupler; a second waveguide between the first optical coupler and the second optical coupler, the second waveguide being longer than the first waveguide; and a ring waveguide that is coupled to the first waveguide. A difference between a length of the first waveguide and a length of the second waveguide differs from a difference in lengths corresponding to a channel spacing by a length corresponding to a phase displacement caused by loading of the ring waveguide. 1. An optical element , comprising:a first delayed interferometer; anda second delayed interferometer and a third delayed interferometer cascaded to the first delayed interferometer, wherein a first optical coupler and a second optical coupler;', 'a first waveguide between the first optical coupler and the second optical coupler;', 'a second waveguide between the first optical coupler and the second optical coupler, the second waveguide being longer than the first waveguide; and', 'a ring waveguide that is coupled to the first waveguide, and, 'the first delayed interferometer comprisesa difference between a length of the first waveguide and a length of the second waveguide differs from a difference in lengths corresponding to a channel spacing by a length corresponding to a phase displacement caused by loading of the ring waveguide.2. The optical element according to claim 1 , whereineach of the second delayed interferometer and the third delayed interferometer includes two delayed interferometers cascaded to each other, anddelay amounts in the two delayed interferometers are respectively 0.5 times and 1 time of a delay amount in the first delayed interferometer.3 ...

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Номер записи: 52
04-01-2018 дата публикации

High-q optical resonator with monolithically integrated waveguide

Номер: US20180006424A1
Автор: Dong Yoon OH, Kerry Vahala, Kiyoul Yang, Seung Hoon Lee
Принадлежит: California Institute of Technology CalTech

A ring optical resonator is formed on a substrate. An outer circumferential surface of the resonator substantially confines one or more circumferential resonant optical modes. The resonator is positioned above a void formed in the substrate and is supported above the void by a portion of a material layer on the substrate that extends radially inward above the void from an outer circumferential edge of the void to the outer circumferential surface of the resonator. An optical waveguide can be integrally formed on the substrate and traverses a portion of the material layer above the void. The optical waveguide and the ring optical resonator are arranged and positioned so as to establish evanescent optical coupling between them. Q-factors of 10 8 or more have been achieved with a silica resonator and silicon nitride waveguide integrally formed on a silicon substrate.

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Номер записи: 53
20-01-2022 дата публикации

VARIABLE BANDWIDTH MICRORING OPTICAL FILTER DEVICE AND METHOD WITH FREQUENCY TUNING

Номер: US20220019023A1
Автор: Jiang Zhiping, Ren Yang, Van Vien
Принадлежит:

Methods and devices that provide a variable-bandwidth optical filter with frequency tuning are disclosed. A universal variable bandwidth optical filter architecture is disclosed, based on microring resonators that can vary both operation wavelength and bandwidth with no extra complexity relative to conventional wavelength tunable filters. The filter architecture provides a universal filter design for any arbitrary shape of filter response, such as second-order, fourth-order, sixth-order, and so on. The filter characteristics—insertion loss, in-band ripple, and out-of-band rejection level—may be maintained over the bandwidth tuning range. There is no need for extra heaters to tune the filter's operating bandwidth, as the same heaters used to tune the filter frequency can be used to tune filter bandwidth. The device can be used as an add/drop filter. 1. A device comprising:an optical interferometer configured to split an optical input into a first path defined by a first arm and a second path defined by a second arm;a first-arm microring resonator (MRR) operably coupled to the first arm for imparting a first-arm MRR frequency-dependent phase to an optical signal passing through the first arm;a second-arm MRR operably coupled to the second arm for imparting a second-arm MRR frequency-dependent phase to an optical signal passing through the second arm; the first-arm MRR and second-arm MRR share a common coupling coefficient; and', 'the first-arm MRR frequency-dependent phase is equal to the negative of the second-arm MRR frequency-dependent phase;, 'a first-arm MRR tuner and a second-arm MRR tuner configured to tune the first-arm MRR frequency-dependent phase and the second-arm MRR frequency-dependent phase, respectively, such that an additional first-arm MRR operably coupled to the first arm in series with the first-arm MRR for imparting an additional first-arm MRR frequency-dependent phase to an optical signal passing through the first arm;', 'an additional second-arm ...

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Номер записи: 54
20-01-2022 дата публикации

Photothermally Actuated Self-Tuning Optical Light Valve

Номер: US20220019048A1
Автор: David Torres Reyes, Harris J Hall, Michael E McConney
Принадлежит: US Air Force

A tunable optical filter for a detector is presented including a plate having a top side and a bottom side. The plate has material properties making it transparent to a range of optical frequencies. A transparent metasurface is proximate the top side of the plate. The transparent metasurface is configured to have a transmissive pass band and a stop band. An undercarriage support structure is proximate the bottom side of the plate. The undercarriage support is responsive to photothermal heating. The undercarriage support is configured to deform from the photothermal heating caused by an undesired signal thereby shifting the stop band in frequency toward the undesired signal to block reception of the undesired signal by the detector.

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Номер записи: 55
27-01-2022 дата публикации

A TUNABLE FILTER HAVING DIFFERENT GAPS

Номер: US20220026274A1
Автор: LEVIN Peleg
Принадлежит:

A tunable filter that may include a pair of optical components, wherein there is an optical gap between the pair of optical components; and a pair of actuating elements that are configured, once supplied with at least one actuating signal, to be positioned at an actuation gap from each other and to define the optical gap; and wherein the optical gap is substantially smaller than the actuation gap. 157-. (canceled)58. A tunable filter , comprising:a moveable member and a stationary member, the moveable member is configured to move with respect to the stationary member;the moveable member comprises a first optical component and a first actuation element and the stationary member comprises a second optical component and a second actuation element, wherein there is an optical gap between the first and second optical components; andthe first and second actuation elements are configured, once supplied with at least one actuating signal, to be positioned at an actuation gap from each other and to define the optical gap, wherein the optical gap is substantially smaller than the actuation gap;wherein the moveable member either comprises the first optical component or is mechanically coupled to the first optical component and; wherein the moveable member is formed of or comprises silicon and the stationary member is formed of or comprises glass and an inner surface of the first actuating element is positioned within a recess formed by etching of the moveable member;wherein the moveable member is physically connected to a flexible member that allows movement of the moveable member upon application of the actuation signal.59. The tunable filter of claim 58 , wherein the flexible member is undulated/corrugated shaped.60. The tunable filter of claim 58 , wherein the moveable member claim 58 , the flexible member and the stationary member claim 58 , enclose a gas-tight sealed chamber.61. The tunable filter of does not include a cap otherwise used for sealing.62. The tunable filter ...

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Номер записи: 56
12-01-2017 дата публикации

Optical spot array pitch compressor

Номер: US20170010418A1
Автор: Andy Fenglei Zhou, Yao Li, Yuanji Tang
Принадлежит: Alliance Fiber Optic Products Co Ltd

An apparatus including a passive wavelength division multiplexing (WDM) demultiplexer (DeMUX) or a passive WDM multiplexer (MUX), an active photo diode (PD) array or an active laser diode (LD) array, and a compressing device disposed between the passive WDM DeMUX or the passive WDM MUX and the active PD array or the active LD array. The compressing device changes the optical spot pitch of the passive WDM DeMUX or the passive WDM MUX o match the pitch of the active PD array or the active LD array. A compression ratio can be adjusted by changing the incident angle of the incident beam to the compressing device.

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Номер записи: 57
12-01-2017 дата публикации

APPARATUS AND METHOD FOR TUNING AND SWITCHING BETWEEN OPTICAL COMPONENTS

Номер: US20170010419A1
Автор: Jiang Zhiping
Принадлежит: Huawei Technologies Co., Ltd.

Apparatuses and methods for tuning and switching between optical components are provided. The apparatuses and methods may be used in the context of optical communication. An example apparatus may include a first optical path having a first tunable component and a second optical path having a second tunable component. The apparatus may also include a first switch component for selectively connecting the first optical path to an output, and a second switch component for selectively connecting the second optical path to the output. The first and second switch components may be semiconductor optical amplifiers (SOAs). The apparatus may have a controller that controls the first switch component and the second switch component to select which optical path is connected to the output and controls tuning of the tunable component in the optical path that is not connected to the output. 1. An apparatus comprising:a first optical path having a first tunable component and a second optical path having a second tunable component;a first switch component for selectively connecting the first optical path to an output;a second switch component for selectively connecting the second optical path to the output;a controller that controls the first switch component and the second switch component to select which optical path is connected to the output and controls tuning of the tunable component in the optical path that is not connected to the output.2. The apparatus of claim 1 , further comprising an optical coupler that couples the first switch component and the second switch component to the output.3. The apparatus of claim 2 , wherein the optical coupler is a 3 dB directional coupler.4. The apparatus of claim 1 , wherein each switch component is a semiconductor optical amplifier (SOA).5. The apparatus of claim 4 , wherein each SOA is selectively configurable by the controller for reverse biasing.6. The apparatus of claim 1 , wherein each switch component has a switching time of less ...

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Номер записи: 58
12-01-2017 дата публикации

APPARATUS AND METHOD FOR TUNING OPTICAL COMPONENTS

Номер: US20170010420A1
Автор: Jiang Zhiping
Принадлежит: Huawei Technologies Co., Ltd.

An apparatus and method for tuning optical components are provided. The apparatus and method may be used for wavelength selection in the context of optical communication. An example apparatus may include a plurality of tunable components, each having an optical output. The apparatus may also include a switch that during each period of a plurality of periods has a switch output that contains a selected one of the optical outputs. The apparatus may operate such that during each period of the plurality of periods, at least one of the tunable components other than the tunable component having the selected optical output is available for tuning. 1. An apparatus comprising:a first optical path having a first tunable component and a second optical path having a second tunable component;a switch for selectively connecting the first optical path or the second optical path to an output;a controller that controls the switch to select which optical path is connected to the output and controls tuning of the tunable component in the optical path that is not connected to the output.2. The apparatus of claim 1 , wherein each tunable component is tunable in frequency.3. The apparatus of claim 2 , wherein each tunable component is a tunable laser.4. The apparatus of claim 2 , wherein each tunable component is a tunable filter.5. The apparatus of claim 2 , wherein:each tunable component comprises a respective plurality of tunable filters.6. The apparatus of claim 4 , further comprising a multi-wavelength source having an output coupled to the tunable components.7. The apparatus of claim 6 , further comprising:an optical splitter that couples the output of the multi-wavelength source to each tunable component.8. The apparatus of claim 7 , wherein:the optical splitter is a variable power optical splitter; andthe variable power optical splitter directs a first portion of light to the selected tunable component and directs a second smaller portion of light to the tunable component that is ...

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Номер записи: 59
12-01-2017 дата публикации

Integrated Lens-Array-On-Substrate For Optical Coupling System And Fabrication Method Thereof

Номер: US20170010427A1
Автор: Pan Dong, Shi Tuo, Yan Shipeng, Zhang Nai
Принадлежит:

An imprinting method for forming an integrated optical coupling device on wafer level may include: providing a substrate, with a reflection coating disposed thereon; providing an imprinting mold, with void regions shaped according to a designed lens profile; forming a molding material on the substrate; pressing the imprinting mold on the molding material on the substrate; curing the molding material into a cured molding material; removing the imprinting mold; depositing an anti-reflection film on the cured molding material; and dicing to form an integrated optical coupling device. 1. An imprinting method for forming an integrated optical coupling device on wafer level , comprising:providing a substrate, with a reflection coating disposed thereon;providing an imprinting mold, with void regions shaped according to a designed lens profile;forming a molding material on the substrate;pressing the imprinting mold on the molding material on the substrate;curing the molding material into a cured molding material;removing the imprinting mold;depositing an anti-reflection film on the cured molding material; anddicing to form an integrated optical coupling device.2. The imprinting method of claim 1 , wherein the substrate comprises a glass substrate claim 1 , a silicon substrate claim 1 , a silicon-on-insulator substrate claim 1 , a silica substrate claim 1 , a sapphire substrate claim 1 , a gallium-arsenide substrate claim 1 , or an indium-phosphide substrate.3. The imprinting method of claim 1 , wherein a material of the imprinting mold comprises silicon claim 1 , tungsten carbide claim 1 , silicon carbide claim 1 , silicon nitride claim 1 , titanium carbide claim 1 , tungsten-cobalt alloy carbide claim 1 , sapphire claim 1 , or a combination thereof.4. The imprinting method of claim 1 , wherein a material of the molding material comprises polymer claim 1 , resin claim 1 , polyimide claim 1 , epoxy claim 1 , or a combination thereof.5. The imprinting method of claim 1 , ...

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Номер записи: 60
14-01-2016 дата публикации

BROADBAND OR MID-INFRARED FIBER LIGHT SOURCES

Номер: US20160010971A1
Автор: Islam Mohammed N.
Принадлежит:

An optical system includes a tunable semiconductor light emitter that generates an input beam having a wavelength shorter than about 2.5 microns, an optical isolator coupled to the emitter and configured to block reflected light into the emitter, an optical amplifier receiving the input beam and outputting an intermediate beam, and optical fibers receiving the intermediate beam and forming an output beam. A subsystem includes lenses or mirrors that deliver the output beam to a sample. The subsystem may include an Optical Coherence Tomography (OCT) apparatus having a sample arm and a reference arm, the output beam having a temporal duration greater than approximately 30 picoseconds, a repetition rate between continuous wave and Megahertz or higher, and a time averaged intensity less than approximately 50 MW/cm. The system may also include a light detection system collecting any of the output beam that reflects or transmits from the sample. 1. An optical system comprising:one or more tunable semiconductor light emitters configured to generate an input beam, wherein at least a portion of the input beam comprises a wavelength shorter than about 2.5 microns;one or more optical isolators coupled to the one or more tunable semiconductor light emitters and configured to substantially prevent a reflected light into the one or more tunable semiconductor light emitters;one or more optical amplifiers configured to receive at least a part of the portion of the input beam and to output an intermediate beam from one of the one or more optical amplifiers;one or more optical fibers configured to receive at least a portion of the intermediate beam and to form an output beam with an output beam wavelength;{'sup': '2', 'a subsystem comprising one or more lenses or mirrors configured to receive a received portion of the output beam, the one of more lenses or mirrors configured to deliver a delivered portion of the output beam to a sample, wherein the subsystem comprises an Optical ...

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Номер записи: 61
14-01-2016 дата публикации

OPTICAL WAVEGUIDE ELEMENT

Номер: US20160011370A1
Автор: OKAYAMA Hideaki
Принадлежит: OKI ELECTRIC INDUSTRY CO., LTD.

An optical waveguide element includes a waveguide core formed of silicon, and a cladding layer formed of a material identical to the waveguide core for enveloping the waveguide core. The optical waveguide element comprising: a high-order propagation mode waveguide; a single input tapered waveguide that is provided on an input terminal of the high-order propagation mode waveguide; a plurality of output tapered waveguides that are provided on an output terminal of the high-order propagation mode waveguide; and an optical feedback elimination waveguide that is provided on the input terminal and disposed alongside the input tapered waveguide. In the optical waveguide element, the input tapered waveguide and the output tapered waveguides are tapered waveguides in which a waveguide width becomes gradually narrower the greater the separation from a terminal of connection to the high-order propagation mode waveguide, and the optical feedback elimination waveguide eliminates reflected light into the cladding layer. 1. An optical waveguide element including a waveguide core formed of silicon , and a cladding layer formed of a material identical to the waveguide core for enveloping the waveguide core , the optical waveguide element comprising:a high-order propagation mode waveguide;a single input tapered waveguide that is provided on an input terminal of the high-order propagation mode waveguide;a plurality of output tapered waveguides that are provided on an output terminal of the high-order propagation mode waveguide; andan optical feedback elimination waveguide that is provided on the input terminal and disposed alongside the input tapered waveguide;whereinthe input tapered waveguide and the output tapered waveguides are tapered waveguides in which a waveguide width becomes gradually narrower the greater the separation from a terminal of connection to the high-order propagation mode waveguide, andthe optical feedback elimination waveguide eliminates reflected light into the ...

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Номер записи: 62
14-01-2016 дата публикации

Waveguide resonator component and method for the production thereof

Номер: US20160011374A1
Автор: Oliver G. Schmidt, Stefan BOETTNER
Принадлежит: Leibniz Institut fuer Festkorper und Werkstofforschung Dresden eV

The invention pertains to the field of electrical engineering/electronics and relates to a waveguide resonator component, which can be used, for example, in integrated circuits. The problem addressed by the invention is that of producing a waveguide resonator component simply and economically. The problem is solved by a waveguide resonator component in which a substrate ( 1 ) having two waveguides ( 3 ) is present and a microtube ( 2 ) is present as resonator, wherein the resonator has a respective recess ( 4 ) in the region of each waveguide in order to form an intermediate space between the waveguide and the resonator. The aim is additionally achieved by a method in which a sacrificial layer is applied to a substrate having two waveguides and at least a second layer is applied to the sacrificial layer, and thereafter the sacrificial layer is at least partially removed and the resonator is produced in the form of a microtube by rolling up the second layer and possible additional layers.

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Номер записи: 63
14-01-2016 дата публикации

On-chip optical polarization controller

Номер: US20160011438A1
Автор: Peng Sun, Qiang Xu, Ronald M. Reano
Принадлежит: Ohio State Innovation Foundation

An example optical polarization controller can include a substantially planar substrate and a waveguide unit cell formed on the substantially planar substrate. The waveguide unit cell can include a first out-of-plane waveguide portion and a second out-of-plane waveguide portion coupled to the first out-of-plane waveguide portion. Each of the first and second out-of-plane waveguide portions can respectively include a core material layer arranged between a first optical cladding layer having a first stress-response property and a second optical cladding layer having a second stress-response property. The first and second stress-response properties can be different such that each of the first and second out-of-plane waveguide portions is deflected by a deflection angle.

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Номер записи: 64
14-01-2016 дата публикации

GENERATING OPTICAL PULSES VIA A SOLITON STATE OF AN OPTICAL MICRORESONATOR

Номер: US20160011489A1
Автор: GORODETSKY Michael L., HERR Tobias, KIPPENBERG Tobias
Принадлежит:

A light pulse source (), being adapted for generating repetitive optical pulses, comprises a continuous wave (cw) laser () being arranged for providing cw laser light, an optical microresonator () being made of a resonator material, which has a third order (Kerr) nonlinearity and an anomalous resonator dispersion, wherein the cw laser () is arranged for coupling the cw laser light into the optical microresonator (), which, at a predetermined relative detuning of the cw laser () and the optical microresonator (), is capable of including a light field in a soliton state, wherein soliton shaped pulses can be coupled out of the optical microresonator () for providing the repetitive optical pulses, and a tuning device () being arranged for creating and maintaining the predetermined relative detuning of the cw laser () and the optical microresonator () based on a tuning time profile being selected in dependency on a thermal time constant of the optical microresonator () such that the soliton state is achieved in a thermal equilibrium state of the optical microresonator (). Furthermore, a method of generating repetitive optical pulses is described based on soliton shaped pulses coupled out of an optical microresonator () is described. 1. A light use source adapted for generating repetitive optical pulses , comprising:a continuous wave (cw) laser arranged for providing cw laser light,an optical microresonator comprising a resonator material, which has a third order (Kerr) nonlinearity and an anomalous resonator dispersion, wherein the cw laser is arranged for coupling the cw laser light into the optical microresonator, which, at a predetermined relative detuning of the cw laser and the optical microresonator, is capable of including a light field in a soliton state, wherein soliton shaped pulses can be coupled out of the optical microresonator for providing the repetitive optical pulses, anda tuning device arranged for creating and maintaining the predetermined relative ...

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Номер записи: 65
10-01-2019 дата публикации

DISTRIBUTED MEASURING DEVICE AND METHOD FOR SIMULTANEOUSLY MEASURING STRAIN AND TEMPERATURE BASED ON OPTICAL FREQUENCY DOMAIN REFLECTION

Номер: US20190011253A1
Автор: Ding Zhenyang, Du Yang, Jiang Junfeng, LIU Kun, Liu Tiegen, XU Zhexi, Yang Di
Принадлежит: TIANJIN UNIVERSITY

The present invention discloses a distributed device for simultaneously measuring strain and temperature based on optical frequency domain reflection, comprising a tunable laser, a 1:99 beam splitter, a main interferometer system, a light source phase monitoring system based on an auxiliary interferometer, an acquisition device and a computer processing unit, wherein the main interferometer system comprises two Mach-Zehnder interferometers, and two optical fibers having different cladding diameters are arranged in parallel as sensing fibers. Due to the difference in temperature and strain coefficients of optical fibers of the same diameter, the temperature and strain values during changing the temperature and strain simultaneously can be obtained by matrix operation, thereby achieving an effect of eliminating cross sensitivity of temperature and strain sensing in optical frequency domain reflection. 2. The distributed device for simultaneously measuring strain and temperature based on optical frequency domain reflection according to claim 1 , wherein the two optical fibers that constitute the sensing fiber are not limited to a standard optical fiber and a small-diameter optical fiber claim 1 , where a relational expression of KK−KK≠0 claim 1 , between the temperature sensing coefficients Kand Kand the strain sensing coefficients Kand Kof the two optical fibers is met claim 1 , the temperature and the strain change parameters can be measured simultaneously.4. The distributed device for simultaneously measuring strain and temperature based on optical frequency domain reflection according to claim 3 , wherein the two optical fibers that constitute the sensing fiber are not limited to the standard optical fiber and the small-diameter optical fiber claim 3 , where a relational expression of KK−KK≠0 between the temperature sensing coefficients Kand Kand the strain sensing coefficients Kand Kof the two optical fibers is met claim 3 , the temperature and the strain change ...

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Номер записи: 66
10-01-2019 дата публикации

DISPLACEMENT SENSOR WITH SEGMENTED RING MICRORESONATOR

Номер: US20190011261A1
Автор: Boutami Salim, DURAFFOURG Laurent, TAUREL Boris
Принадлежит: Commissariat A L'Energie Atomique Et Aux Energies Alternatives

An optical sensor includes an optical device including a microresonator, laid out to guide a light beam along a closed loop optical path, and an injection and/or extraction waveguide, optically coupled to the microresonator; a photodetector, arranged at the output of the injection and/or extraction waveguide; and an analysis device, receiving a signal supplied by the photodetector, and deducing therefrom information relative to a displacement. The microresonator is constituted of a plurality of elementary waveguides spaced apart from each other, and arranged one after the other according to a loop shaped layout. The optical sensor offers increased sensitivity to the measurement of nanometric displacements. 1. An optical sensor comprising:an optical device comprising a waveguide microresonator, laid out to guide a light beam along a closed loop optical path, and an injection and extraction waveguide, or an injection waveguide and an extraction waveguide, optically coupled to the microresonator for the injection and the extraction of said light beam;a photodetector, arranged at the output of the injection and extraction waveguide, respectively at the output of the extraction waveguide; andan analysis device, receiving at the input a signal supplied by the photodetector, configured to compare said signal with reference data, and to deduce therefrom information relative to a displacement within the optical device;wherein the microresonator is constituted of a plurality of elementary waveguides spaced apart from each other, and arranged one after the other according to a loop shaped layout.2. The optical sensor according to claim 1 , comprising an ancillary moveable element claim 1 , adapted to move relative to the microresonator so as to traverse partially or totally a free space between two neighbouring elementary waveguides.3. The optical sensor according to claim 1 , wherein the elementary waveguides of the microresonator are suspended above a substrate claim 1 , and ...

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Номер записи: 67
14-01-2021 дата публикации

NON-PLANAR WAVEGUIDE STRUCTURES

Номер: US20210011220A1
Автор: Bian Yusheng, JACOB Ajey Poovannummoottil
Принадлежит:

The present disclosure relates to semiconductor structures and, more particularly, to non-planar waveguide structures and methods of manufacture. The structure includes: a first waveguide structure; and a non-planar waveguide structure spatially shifted from the first waveguide structure and separated from the first waveguide structure by an insulator material. 1. A structure comprising:a first non-planar waveguide structure comprising semiconductor material; anda second non-planar waveguide structure comprising the semiconductor material and spatially shifted in a vertical orientation from the first non-planar waveguide structure such that lower horizontal sections of the first non-planar waveguide and the second non-planar waveguide are in a different plane and separated from one another in both the vertical orientation and a horizontal orientation by an insulator material.2. The structure of claim 1 , wherein the first non-planar waveguide structure crosses the second non-planar waveguide structure.3. The structure of claim 2 , wherein the crossing occurs at a non-planar portion of the second non-planar waveguide structure.4. (canceled)5. (canceled)6. The structure of claim 1 , wherein the first non-planar waveguide structure is vertically shifted and crosses over the second non-planar waveguide structure.7. The structure of claim 6 , wherein the first non-planar waveguide structure is vertically shifted by 180 degrees from the non-planar waveguide structure.820.-. (canceled)21. The structure of claim 1 , wherein the second non-planar waveguide structure includes rounded corners transitioning between vertical sections and the horizontal sections.22. The structure of claim 21 , wherein the first non-planar waveguide structure and the second non-planar waveguide structure cross between vertical sections of the second non-planar waveguide structure and the lower horizontal sections of the second non-planar waveguide are on a same plane as upper horizontal sections ...

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Номер записи: 68
14-01-2021 дата публикации

OPTICAL FILTER CONTROL

Номер: US20210011221A1
Автор: JANSSEN Adrian Perrin
Принадлежит:

An optical filter assembly comprising: 1. An optical filter assembly comprising:a tuneable optical filter;a beam splitter assembly configured to split an input beam into an output beam, a reference beam, and a probe beam and to direct the output beam and the probe beam through the tuneable optical filter such that the probe beam is at an angle relative to the output beam;a first detector configured to measure an intensity of the reference beam;a second detector configured to measure an intensity of the probe beam after it has passed through the tuneable optical filter; anda controller configured to adjust the tuneable optical filter based on the measured intensity of the reference beam and the measured intensity of the probe beam.2. The optical filter assembly of claim 1 , wherein the beam splitter assembly is further configured to direct the probe beam and output beam such that the probe beam and output beam intersect within the tuneable optical filter.3. The optical filter assembly of claim 2 , further comprising:a beam separation assembly configured to separate the output beam and probe beam after they have passed through the tuneable optical filter and direct the probe beam to the second detector.4. The optical filter assembly of claim 3 , wherein the beam separation assembly comprises a lens and an optical fibre having a core and an angled reflective surface at one end claim 3 ,wherein the lens is configured to focus the output beam and the probe beam onto a focal plan,wherein the optical fibre is positioned such that an end of the fibre is located at the focal plane,wherein a corresponding end of the core is located at a focal point of the output beam and the angled reflective surface is located at a focal point of the probe beam.5. The optical filter assembly of claim 1 , whereinthe beam splitter assembly is further configured to receive the input beam polarised with a first polarisation and a secondary beam polarised with a second, orthogonal polarisation, ...

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Номер записи: 69
10-01-2019 дата публикации

Optical splitter circuit

Номер: US20190011636A1
Автор: Morio Takahashi
Принадлежит: NEC Corp

Provided is an optical splitter circuit capable of solving a problem that stability of an optical splitting ratio is low. An optical splitter 201 splits an input light beam. Arm waveguides 202 and 203 each have a width that decreases in a direction in which a light beam propagates and a tapered structure that propagates the light beam split by the optical splitter 201. Taper angles of these tapered structures differ from each other. The optical multiplexer 204 multiplexes the light beams from the arm waveguides 202 and 203 and then outputs them.

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Номер записи: 70
10-01-2019 дата публикации

ATHERMAL SILICON PHOTONICS WAVELENGTH LOCKER AND METER

Номер: US20190011638A1
Автор: Soda Haruhisa
Принадлежит:

A wavelength locker includes first and second waveguides to guide light. The wavelength locker also includes a multimode interference (MMI) coupler having a number of inputs and outputs. First and second inputs of the MMI coupler are coupled to outputs of the first and second waveguides. The MMI coupler merges light from the first and second waveguides to generate an interference pattern of light. The MMI coupler then outputs a plurality of phase shifted versions of the interference pattern. The wavelength locker also includes an interference pattern selector configured to receive signals corresponding, respectively, to light output from the outputs of the MMI coupler. The interference pattern selector is also configured to select one or more outputs of the MMI coupler based on power levels of the interference patterns output from the MMI coupler and a predetermined frequency of a telecommunications frequency grid. 1. A wavelength locker , comprising:a first multimode interference (MMI) coupler, at least one input of the first MMI coupler being coupled to a coherent source of light;a first waveguide having an input coupled to a first output of the first MMI coupler;a second waveguide having an input coupled to a second output of the first MMI coupler;a second MMI coupler having a plurality of inputs and a plurality of outputs, a first of the plurality of inputs of the second MMI coupler being coupled to an output of the first waveguide, and a second of the plurality of inputs of the second MMI coupler being coupled to an output of the second waveguide; and receive a plurality of signals corresponding, respectively, to light output from the plurality of outputs of the second MMI coupler; and', 'select a pair of the plurality of outputs of the second MMI coupler based on a predetermined frequency of a telecommunications frequency grid., 'an interference pattern selector configured to2. The wavelength locker according to claim 1 , wherein the interference pattern ...

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Номер записи: 71
10-01-2019 дата публикации

RECONFIGURABLE SPECTROSCOPY SYSTEM

Номер: US20190011639A1
Автор: Abediasl Hooman, Nagra Amit Singh, Rickman Andrew George, Schrans Thomas Pierre, Srinivasan Pradeep, TRITA Andrea, Zilkie Aaron John
Принадлежит:

A reconfigurable spectroscopy system comprises tunable lasers and wavelength lockers to lock to accurate reference wavelengths. Band combiners with differently optimized wavelength ranges multiplex the optical signal over the time domain, to emit a plurality of reference wavelengths for spectroscopy applications. The power requirements are greatly reduced by multiplexing over the time domain in time slots which do not affect sampling and receiving of the spectroscopy data. 1. A device comprising:a plurality of tunable lasers generating a plurality of wavelengths;a plurality of wavelength lockers to reduce wavelength noise from the plurality of wavelengths;a plurality of band combiners each configured to combine a different wavelength range than other band combiners of the plurality of band combiners;a plurality of switches, each switch receiving an output of a corresponding band combiner of the plurality of band combiners, each switch outputting a plurality of switched wavelengths;a plurality of broadband combiners receiving outputs of the plurality of switches; anda plurality of emitters to emit a plurality of reference wavelengths, each emitter receiving an output of a corresponding broadband combiner of the plurality of broadband combiners.2. The device of claim 1 , wherein each wavelength locker of the plurality of wavelength lockers is between a tunable laser of the plurality of tunable lasers and a band combiner of the plurality of band combiners.3. The device of claim 1 , wherein the plurality of wavelength lockers comprises a plurality of optical channel monitors located after the plurality of band combiners claim 1 , and feeding back to the plurality of tunable lasers.4. The device of claim 1 , wherein each band combiner of the plurality of band combiners is configured to operate within a wavelength range of 100 nm.5. The device of claim 1 , wherein each wavelength locker of the plurality of wavelength lockers comprises feed-forward or feedback noise ...

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Номер записи: 72
10-01-2019 дата публикации

WAVELENGTH LOCKING FILTER

Номер: US20190011732A1
Автор: Guzzon Robert Silvio
Принадлежит:

An optical system can automatically lock an adjustable spectral filter to a first wavelength of an incoming light signal, and can automatically filter an additional incoming light signal at the first wavelength. A tunable filter can have a filtering spectrum with an adjustable peak wavelength and increasing attenuation at wavelengths away from the adjustable peak wavelength. The tunable filter can receive first input light, having a first wavelength, and can spectrally filter the first input light to form first output light. A detector can detect at least a fraction of the first output light. Circuitry coupled to the detector and the tunable filter can tune the tunable filter to maximize a signal from the detector and thereby adjust the peak wavelength to match the first wavelength. The tunable filter further can receive second input light and spectrally filter the second input light at the first wavelength. 1. An optical system , comprising:a first input waveguide configured to deliver first input light having a first wavelength;a tunable filter coupled to the first input waveguide to receive the first input light, the tunable filter having a filtering spectrum with an adjustable peak wavelength and increasing attenuation at wavelengths away from the adjustable peak wavelength, the tunable filter configured to adjust the peak wavelength to match the first wavelength; anda tunable light source configured to produce second input light having a second wavelength and deliver the second input light to the tunable filter, the tunable light source further configured to adjust the second wavelength to match the peak wavelength of the tunable filter and thereby match the first wavelength.2. The optical system of claim 1 , wherein the tunable filter is configured to spectrally filter the first input light to form first output light claim 1 , the topical system further comprising:a first detector configured to detect at least a fraction of the first output light; andfirst ...

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Номер записи: 73
10-01-2019 дата публикации

OPTICAL SOLID-STATE BEAM STEERING USING NON-LINEAR CONVERTER

Номер: US20190011803A1
Автор: Ketteridge Peter A., Moffitt Paul R., Schunemann Peter G.
Принадлежит:

A solid state optical beam steering device and method of operation includes converting a frequency or wavelength of a signal in a non-linear converter associated with one channel just before launch. A second channel has a similar constructions and operation. A processor compares the phase difference between the two channels and uses the difference to horizontally steer a beam without moving mechanical parts. This establishes the solid-state nature of the present disclosure. The non-linear converter may be a quasi-phase matched non-linear converter with alternating crystal domains. 1. A solid state optical beam steering device comprising:a first waveguide carrying a first optical wavelength;a phase modulator modulating the first wavelength;a second waveguide carrying an optical pump signal, wherein the first waveguide is evanescently coupled to the second waveguide; anda non-linear converter optically aligned with the second waveguide to amplify or convert the first optical wavelength to a different wavelength band or frequency and establish a second optical wavelength from the optical pump signal adapted to be steered based on the different wavelength band or frequency.2. The solid state optical beam steering device of claim 1 , wherein the non-linear converter is a quasi-phase matched (QPM) third waveguide comprising:a plurality of aligned sections formed from a conversion material, wherein adjacent sections alternate directions to reverse a sign of the second optical wavelength moving along the QPM third waveguide.3. The solid state optical beam steering device of claim 2 , further comprising a cladding layer positioned intermediate the first waveguide and the QPM third waveguide.4. The solid state optical beam steering device of claim 2 , further comprising:a core of the first waveguide adjacent a cladding layer;wherein the non-linear converter is evanescently coupled to the first waveguide.5. The solid state optical beam steering device of claim 4 , wherein the ...

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Номер записи: 74
14-01-2021 дата публикации

SYSTEMS AND METHODS FOR PARALLEL PHOTONIC COMPUTING

Номер: US20210011508A1
Автор: Chang Matthew, Nahmias Mitchell A.
Принадлежит:

A system for parallel photonic computation, preferably including one or more source modules, a plurality of multiplication modules, and a plurality of summation modules. In one embodiment, each multiplication module can include a set of input modulators, a splitter, and a plurality of multiplication banks. Each summation module can include one or more detectors. Each summation module preferably receives an output from multiple multiplication modules and computes the sum of all channels of all the received outputs. A method for parallel photonic computation, preferably including generating input signals, computing products, and computing sums. 1. A method for photonic computing comprising , at a photonic computing system comprising a first plurality of multiplication modules (MMs) and a second plurality of summation modules (SMs) , each MM of the first plurality comprising a respective plurality of multiplication banks: for each multiplication bank of the respective plurality, at the multiplication bank, receiving a respective control signal representative of a respective plurality of multiplier values;', 'generating a respective plurality of optical input signals, each optical input signal comprising input signal light within each of a plurality of optical channels, wherein the input signal light of each optical channel of the plurality is representative of a respective multiplicand value; and', providing the optical input signal to a respective multiplication bank of the MM;', 'at the respective multiplication bank, generating a filtered signal by filtering the optical input signal based on the control signal, the filtered signal comprising filtered light within each of the plurality of optical channels; wherein, for each optical channel of the plurality, the filtered light within the optical channel is representative of a respective product of: a multiplier value of the respective plurality and the respective multiplicand value associated with the input signal ...

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Номер записи: 75
09-01-2020 дата публикации

METHOD AND DEVICE FOR NON-RECIPROCAL TRANSMISSION OF ELECTROMAGNETIC RADIATION BEAM

Номер: US20200012048A1
Автор: REGELSKIS Kestutis
Принадлежит:

An electromagnetic radiation beam is inputted into a ring interferometer rotating at the angular velocity Ω where the beam is split into two equally intensive counter—propagating electromagnetic beams. The Sagnac Effect results in the phase shift of ±Pi/2 radians, which may be either positive or negative depending on the direction in which the counter-propagating electromagnetic radiation beams propagate with regard to the rotation direction of the ring interferometer. An additionally phase shift of Pi/2 radians is induced between the counter-propagating electromagnetic radiation beams inside the ring interferometer results in a total phase shift of either Pi radians or 0. The counter-propagating electromagnetic radiation beams inside the ring interferometer are then combined into one single electromagnetic radiation (EMR) beam which outputted from the rotating ring interferometer by using a different path than the one through which the EMR beam is inputted into it. 1. A method for non-reciprocal transmission of an electromagnetic radiation (EMR) beam intended to transmit the EMR beam forward and prevent reverse transmission by directing forward and reverse propagating EMR beams along different paths comprising:{'b': 1', '2', '3', '4', '12, 'a) inputting the EMR beam through any preselected path of input/output paths (, , , ) into a rotating ring interferometer (), which rotates at an angular velocity Ω;'}{'b': 12', '6', '7', '12', '6', '7', '12, 'b) splitting the EMR beam inside the rotating ring interferometer () into two equally or nearly equally intensive split counter-propagating EMR beams travelling along counter-paths (), () inside the rotating ring interferometer () and because of a Sagnac Effect, a phase shift of ±Pi/2+m*Pi radians, where m is any integer number, is induced between two split counter-propagating EMR beams, which may be either positive or negative, with respect to the phase shift m*Pi radians, depending on a direction in which the counter- ...

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Номер записи: 76
09-01-2020 дата публикации

Bi-directional optical sub-assembly, optical network unit, optical line terminal, and passive optical network system

Номер: US20200012055A1
Автор: Jian Chen, Shengping Li, Zhicheng Ye
Принадлежит: Huawei Technologies Co Ltd

Embodiments relate to the field of optical communications technologies. The bi-directional optical sub-assembly includes a transmitter optical path sub-assembly, a receiver optical sub-assembly, a wavelength division multiplexing sub-assembly, and an optical fiber interface. The transmitter optical path sub-assembly is configured to: generate emitted light and provide the emitted light for the wavelength division multiplexing sub-assembly; the wavelength division multiplexing sub-assembly is configured to: transparently transmit, to the optical fiber interface, the emitted light from the transmitter optical path sub-assembly, and reflect, to the receiver optical sub-assembly, received light from the optical fiber interface; the optical fiber interface is configured to: transmit, to the outside, the emitted light from the wavelength division multiplexing sub-assembly, and transmit, to the wavelength division multiplexing sub-assembly, received light received from the outside; and the receiver optical sub-assembly is configured to receive the received light reflected by the wavelength division multiplexing sub-assembly.

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Номер записи: 77
09-01-2020 дата публикации

TOROIDAL MICRO LENS ARRAY FOR USE IN A WAVELENGTH SELECTIVE SWITCH

Номер: US20200012165A1
Автор: Haller Mitchell E.
Принадлежит: Molex, LLC

An optical device includes a plurality of optical ports for receiving optical beams. The optical device also includes a plurality of toric micro lenses each receiving one of the optical beams from a respective one of the optical ports. A dispersion element is provided for spatially separating in a dispersion plane the optical beam into a plurality of wavelength components. At least one focusing element is provided for focusing the plurality of wavelength components. A programmable optical phase modulator is also provided for receiving the focused plurality of wavelength components. The modulator is configured to selectively direct the wavelength components to prescribed ones of the optical ports. The toric lenses impart positive power to the optical beams in the port plane and negative optical power to the optical beams in a plane orthogonal to the port plane. 1. An optical device , comprising:a plurality of optical ports for receiving optical beams;a plurality of toric micro lenses each receiving one of the optical beams from a respective one of the optical ports, thea dispersion element for spatially separating in a dispersion plane the optical beam into a plurality of wavelength components;at least one focusing element for focusing the plurality of wavelength components; anda programmable optical phase modulator for receiving the focused plurality of wavelength components, the modulator being configured to selectively direct the wavelength components to prescribed ones of the optical ports, wherein the toric lenses impart positive power to the optical beams in the port plane and negative optical power to the optical beams in a plane orthogonal to the port plane.2. The optical device of claim 1 , wherein the toric lenses are aspheric toric lenses.3. The optical device of claim 1 , wherein the toric micro lenses are positioned relative to the optical ports from which the optical beams are respectively received such that a beam waist of the optical beams in the ...

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Номер записи: 78
11-01-2018 дата публикации

OPTICAL ELEMENT

Номер: US20180013512A1
Автор: AKIYAMA Tomoyuki
Принадлежит:

An optical element includes a gain chip, a ring modulator, which is a band-pass filter, a first optical waveguide and a second optical waveguide that are optically connected to the ring modulator, and a heater, wherein the first optical waveguide and the second optical waveguide are formed to be equal in optical path length (have no difference in optical path length) between a first light coupling point and a second light coupling point and equal in shape and length between the first light coupling point and the second light coupling point (to be symmetrical with the ring modulator interposed therebetween (with respect to the ring modulator)). 1. An optical element comprising:a band-pass filter whose center wavelength can be modulated;a first optical waveguide and a second optical waveguide configured to be optically coupled to the band-pass filter; anda gain waveguide configured to have one waveguide end connected to the first optical waveguide or the second optical waveguide and have the other waveguide end on which a reflective film is provided, whereinthe first optical waveguide and the second optical waveguide are formed so as to be optically coupled at a first point of one waveguide ends thereof and optically coupled at a second point of the other waveguide ends thereof, and the difference in optical path length from the first point to the second point between the first optical waveguide and the second optical waveguide is an integral multiple of the optical wavelength.2. The optical element according to claim 1 , whereinthe first optical waveguide and the second optical waveguide are equal in optical path length between the first point and the second point.3. The optical element according to claim 1 , whereinthe first optical waveguide and the second optical waveguide are equal in shape between the first point and the second point.4. The optical element according to claim 1 , whereinthe first optical waveguide and the second optical waveguide are formed to be ...

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Номер записи: 79
09-01-2020 дата публикации

Transceiver with multi-wavelength coexistence

Номер: US20200014484A1
Автор: Chen Peijuan
Принадлежит:

A transceiver with multi-wavelength coexistence is disclosed. A BOSA (bi-direction optical sub-assembly), a PCB () and a fiber receptacle () are disposed within a transceiver housing; the PCB () is horizontally arranged in the transceiver housing; the fiber receptacle () is disposed on the BOSA; the BOSA comprises multiple transmitters () and multiple receivers () all of which are optically coupled with the fiber receptacle () and electrically connected with the PCB (); two or more BOSAs, which are stacked in parallel or perpendicular to the PCB (), are disposed in the transceiver housing and respectively connected with an external fiber through multiple fiber receptacles (). 1: A transceiver with multi-wavelength coexistence , wherein:a BOSA (bi-direction optical sub-assembly), a PCB (printed circuit board) and a fiber receptacle are disposed within a transceiver housing; the PCB is horizontally placed in the transceiver housing; the fiber receptacle is disposed on the BOSA; the BOSA comprises N transmitters and N receivers all of which are optically coupled with the fiber receptacle and electrically connected with the PCB; M BOSAs, which are stacked vertically or horizontally, are disposed in the transceiver housing and respectively connected with an external fiber through M fiber receptacles, wherein M≥2 and N≥2.2: The transceiver with multi-wavelength coexistence claim 1 , as recited in claim 1 , wherein: every BOSA further comprises a WDM (wavelength division multiplexing) system and a single fiber bidirectional optical interface claim 1 , N transmitters respectively transmit N emitted light beams with different wavelengths claim 1 , N receivers respectively receive N incident light beams with different wavelengths claim 1 , the emitted light beams and the incident light beams respectively enter and exit from the fiber receptacles claim 1 , and share the WDM system and the single fiber bidirectional optical interface in a transmission path.3: The transceiver ...

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Номер записи: 80
03-02-2022 дата публикации

WAVEGUIDE-BASED PROJECTOR

Номер: US20220035159A1
Автор: Calafiore Giuseppe, Koshelev Alexander
Принадлежит:

A projector includes an illumination waveguide layer, a collimation waveguide layer, and a spatial modulator. The illumination waveguide layer expands a light beam which is coupled to the spatial modulator. The spatial modulator modulates the expanded light beam to provide a line of light points of controllable brightness. The collimation waveguide collimates light of the light points to obtain a fan of collimated light beams. Each collimated light beam of the fan has an angle corresponding to a coordinate of the corresponding light point of the line. A tiltable reflector may be placed at the exit pupil to scan the fan of light beams in a plane non-parallel to the plane of the fan, thus providing a 2D image in angular domain. An array of Mach-Zehnder interferometers may be used in place of the illumination waveguide layer and the spatial modulator to provide the line of light points. 1. A projector comprising:an illumination waveguide layer comprising a first input port for receiving a first light beam, a slab waveguide portion optically coupled to the first input port for expanding the first light beam, and an output surface for outputting the first light beam expanded in the slab waveguide portion;a spatial modulator optically coupled to the output surface of the illumination waveguide layer for spatially modulating the expanded first light beam to provide a line of light points; anda collimation waveguide layer optically coupled to the spatial modulator for receiving and collimating light of the light points to obtain a fan of collimated light beams at an exit pupil of the collimation waveguide layer, each collimated light beam of the fan having an angle corresponding to a coordinate of the corresponding light point of the line.2. The projector of claim 1 , wherein the slab waveguide portion of the illumination waveguide layer comprises a curved reflector for collimating the first light beam in a plane of the slab waveguide portion.3. The projector of claim 1 , ...

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Номер записи: 81
19-01-2017 дата публикации

Optical Apparatus

Номер: US20170017037A1
Автор: SUN CHIA-TSE, Yang Bin-Huang, Yang Bo-Syung
Принадлежит:

An optical apparatus includes a prism, a plurality of filter elements, a plurality of lenses, a light receiver array, a collimator lens and a base. The prism includes a light entering surface and a light exit surface parallel to each other. The filter elements are disposed on the light exit surface. The lenses correspond to the filter elements. The light receiver array includes a plurality of light receivers which correspond to the lenses. The light signal including a plurality of sub-signals enters the prism through the light entering surface. The sub-signals are separated from the light signal by the filter elements and exit from the light exit surface of the prism, and each of the sub-signals is transmitted through one of the lenses to one of the light receivers. The base is a continuous-unitary piece for positioning other elements. 1. An optical apparatus , comprising:a prism comprising a light entering surface and a light exit surface, wherein a light signal enters the prism through the light entering surface, and is totally reflected between the light entering surface and the light exit surface a plurality of times;a plurality of filter elements disposed on the light exit surface;a plurality of lenses corresponding to the filter elements;a light receiver array comprising a plurality of light receivers which correspond to the lenses;a collimator lens; anda base comprising a main body and a first support portion, wherein the first support portion supporting the collimator lens is disposed on and formed with the main body to be a continuous unitary piece.2. The optical apparatus as claimed in claim 1 , wherein the optical apparatus further comprises a second support portion which supports the prism.3. The optical apparatus as claimed in claim 2 , wherein the second support portion is integrally formed with the prism to be the continuous unitary piece.4. The optical apparatus as claimed in claim 2 , wherein:the light signal from the collimator lens enters the ...

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Номер записи: 82
19-01-2017 дата публикации

MULTIPLEXER/DEMULTIPLEXER BASED ON DIFFRACTION AND REFLECTION

Номер: US20170017038A1
Автор: Greiner Christoph M., Iazikov Dmitri, Mossberg Thomas W.
Принадлежит:

Transmissive diffraction grating(s), reflector(s), and multiple optical sources/receivers are arranged such that each one of multiple optical signals at corresponding different wavelengths co-propagating along a multiplexed beam path would: (i) be transmissively, dispersively diffracted at a multiplexed transmission region of a grating; (ii) propagate between the multiplexed transmission region and multiple demultiplexed transmission regions of a grating undergoing reflection(s) from the reflector(s); (iii) be transmissively, dispersively diffracted at the demultiplexed transmission regions; and (iv) propagate between the demultiplexed transmission regions and the sources/receivers along multiple demultiplexed beam paths. 1. A method for either demultiplexing or multiplexing a set of multiple optical signals , the method comprising either:(A) directing a multiplexed optical signal to propagate along a multiplexed beam path to a multiplexed transmission region of one or more diffractive optical elements of an optical apparatus, wherein the multiplexed optical signal comprises a corresponding optical signal at each one of multiple different corresponding wavelengths in an operational wavelength range, and receiving each corresponding optical signal at a corresponding one of multiple optical receivers of the optical apparatus, wherein each corresponding optical signal propagates from a corresponding demultiplexed transmission region of a corresponding one of the one or more diffractive optical elements along a corresponding demultiplexed beam path to the corresponding optical receiver;or(B) emitting a corresponding optical signal from each one of multiple optical sources at each one of the multiple different corresponding wavelengths to propagate along the corresponding demultiplexed beam path to the corresponding demultiplexed transmission region, wherein the corresponding optical signals propagate from the multiplexed transmission region along or substantially ...

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Номер записи: 83
19-01-2017 дата публикации

Optical Interconnector, Optoelectronic Chip System, and Optical Signal Sharing Method

Номер: US20170017039A1
Автор: Fei Zhao, Hongyan Fu, Xin TU
Принадлежит: Huawei Technologies Co Ltd

An optical interconnector ( 915 ) includes: a first vertical coupled cavity ( 100 ), a first optical waveguide ( 102 ), and a second optical waveguide ( 103 ). The first vertical coupled cavity ( 100 ) includes N identical micro-resonant cavities that are equidistantly stacked, where a center of each micro-resonant cavity is located on a first straight line that is perpendicular to a plane on which the micro-resonant cavity is located, the first optical waveguide ( 102 ) and a first micro-resonant cavity ( 11 ) are in a same plane, the second optical waveguide ( 103 ) and a second micro-resonant cavity ( 13 ) are in a same plane, the first optical waveguide ( 102 ) is an input optical waveguide, the second optical waveguide ( 103 ) is a first output optical waveguide, and an optical signal having a first resonant wavelength in the first optical waveguide ( 102 ) enters the second optical waveguide ( 103 ) through the first vertical coupled cavity ( 100 ).

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Номер записи: 84
19-01-2017 дата публикации

WDM MUX/DEMUX ON CABLE AND METHODS OF MAKING THE SAME

Номер: US20170017053A1
Автор: Li Yao, Xiao Charlie
Принадлежит: Alliance Fiber Optic Products, Inc.

Techniques for WDM Mux/DeMux on cable and methods of making the same are described According to one aspect of the present application, a unit designed to provide multiplexing or demultiplexing (Mux/Demux) functions is implemented on cable. In other words, the Mux/Demux unit is coupled by a multi-fiber cable to a system (e.g., a system rack for router or switch that has multiple pluggable transceiver slots). 1. An optical device comprising:a first enclosure, including a box housing passive optical components to provide multiplexing or demultiplexing (Mux/Demux) functions, having first and second ends disposed on two opposite ends of the first enclosure, wherein a multi-fiber cable secured on the first end is coupled to a plurality of fibers connected respectively to the passive optical components, and a duplex fiber cable secured on the second end includes at least two fibers, one from an input to the Mux/Demux functions and the other from an output of the Mux/Demux functions, wherein the duplex fiber cable is extended from the second end of the first enclosure to a duplex cable connector; anda second enclosure in a form factor to be received in one of multiple pluggable transceiver slots in a system rack, the second enclosure including a transceiver;wherein the first enclosure accommodates a first transition area at the first end of the first enclosure for the plurality of fibers and a second transition area at the second end of the first enclosure for the at least two fibers to isolate the plurality of fibers and the at least two fibers from experiencing undesired forces.2. The optical device of claim 1 , wherein the passive optical components are fixed to a substrate housed in the first enclosure.3. The optical device of claim 2 , wherein the passive optical components and the substrate are epoxy sealed claim 2 , soldered or laser welded in a unit so that moisture would not enter into the unit or degrade performance of each of the passive optical components.4. The ...

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Номер записи: 85
21-01-2016 дата публикации

ENERGY SYSTEM MONITORING

Номер: US20160018319A1
Автор: Hegyi Alex, Kiesel Peter, Raghavan Ajay
Принадлежит:

An optical coupler includes at least one input waveguide and a plurality of output waveguides. The optical coupler spatially disperses optical signals carried on the input waveguide according to wavelength to the output waveguides. The input waveguides and the output waveguides are arranged to provide crosstalk between optical signals carried on the output waveguides. 1. A monitoring system for an energy system , comprising:N>1 optical sensors, each optical sensor operating within a different wavelength range and emanating output light in response to input light, the output light having a centroid wavelength that changes in response to a sensed parameter of the energy system;a plurality of photodetectors, each photodetector configured to generate an electrical signal in response to light incident on a light sensitive surface of the photodetector; andan optical coupler including at least one input waveguide configured to receive light from the optical sensors and a plurality of output waveguides, the optical coupler configured to disperse light from the input waveguide to the output waveguides according to wavelength of light so that sensor output light emanating from each optical sensor is optically coupled through at least one output waveguide to at least one photodetector, wherein the electrical signal generated by the photodetector in response to the sensor output light provides information about the sensed parameter of the energy system.2. The system of claim 1 , wherein the optical coupler comprises an arrayed waveguide grating.3. The system of claim 1 , wherein the optical coupler comprises a linear variable filter.4. The system of claim 1 , wherein:the plurality of output waveguides comprises N pairs of output waveguides;the plurality of photodetectors comprises N pairs of photodetectors; andthe optical coupler is configured to spatially disperse light from the input waveguide according to wavelength so that the output light emanating from each optical sensor ...

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Номер записи: 86
21-01-2016 дата публикации

OPTICAL DEVICE USING ECHELLE GRATING THAT PROVIDES TOTAL INTERNAL REFLECTION OF LIGHT

Номер: US20160018595A1
Автор: Barkai Assia, Frish Harel, HAREL OSHRIT, HSIEH I-WEI, Krishnamurthi Mahesh, Lin Wenhua, Rong Haisheng
Принадлежит:

Embodiments of the present disclosure are directed toward techniques and configurations for an optical device having a semiconductor layer to propagate light and a mirror disposed inside the semiconductor layer and having echelle grating reflective surface to substantially totally internally reflect the propagating light inputted by one or more input waveguides, to be received by one or more output waveguides. The waveguides may be disposed in the semiconductor layer under a determined angle relative to the mirror reflective surface. The determined angle may be equal to or greater than a total internal reflection angle corresponding to the interface, to provide substantially total internal reflection of light by the mirror. The mirror may be formed by an interface of the semiconductor layer comprising the mirror reflective surface and another medium filling the mirror, such as a dielectric. Other embodiments may be described and/or claimed. 1. An optical apparatus comprising:a semiconductor layer to propagate light from at least one light source;a mirror disposed inside the semiconductor layer, and having echelle grating reflective surface to reflect and refocus the propagating light;at least one input optical waveguide disposed inside the semiconductor layer to spatially disperse the propagating light onto the mirror; andat least one output optical waveguide disposed inside the semiconductor layer to receive at least a portion of light reflected by the mirror,wherein the input and output optical waveguides are disposed under a determined angle relative to the mirror reflective surface, to provide substantially total internal reflection of light by the mirror.2. The optical apparatus of claim 1 , wherein the mirror is formed in a trench disposed in the semiconductor layer.3. The optical apparatus of claim 2 , wherein the mirror reflective surface is etched on at least one facet of the trench.4. The optical apparatus of claim 3 , wherein the trench is filled with a ...

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Номер записи: 87
21-01-2016 дата публикации

DELAY LINE INTERFEROMETER MULTIPLEXER

Номер: US20160018600A1
Автор: Huebner Bernd, Matsui Yasuhiro, Roxlo Charles B.
Принадлежит:

In an embodiment, a delay line interferometer (DLI) multiplexer (MUX) includes a first stage and a second stage. The first stage includes a first DLI and a second DLI. The first DLI includes a first left input, a first right input, and a first output and has a free spectral range (FSR) that is about four times a nominal channel spacing. The second DLI includes a second left input, a second right input, and a second output and has an FSR that is about four times the nominal channel spacing. The second stage is coupled to the first stage and includes a third DLI. The third DLI includes a third left input optically coupled to the first output, a third right input optically coupled to the second output, and a third output. An FSR of the third DLI is about two times the nominal channel spacing.

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Номер записи: 88
18-01-2018 дата публикации

INTEGRATED POLARIZING AND ANALYZING OPTICAL FIBER COLLIMATOR DEVICE AND METHODS OF USE THEREOF

Номер: US20180017734A1
Автор: Pradhan Atul, Stelick Scott
Принадлежит:

An integrated optical collimator device includes an optical fiber extending from a first end to a second end. The first end of the optical fiber is configured to be coupled to a light source or a light receiver. A housing is coupled to the ferrule and extends radially over the ferrule. A collimating lens is positioned in the housing proximate the second end of the optical fiber. A polarizer element is positioned within the housing proximate the collimating lens. 1. An integrated optical collimator device comprising:an optical fiber extending between a first end to a second end, wherein the first end is configured to be coupled to a light source or a light receiver;a housing configured to receive at least a portion of the optical fiber including the second end;a collimating lens positioned in the housing and optically coupled to the optical fiber; anda polarizer element positioned in the housing and optically coupled to the collimating lens.2. The device as set forth in further comprising a ferrule surrounding the at least a portion of the optical fiber claim 1 , wherein the ferrule is bonded to the optical fiber proximate the second end of the optical fiber.3. The device as set forth in claim 2 , wherein the ferrule is cylindrical.4. The device as set forth in claim 2 , wherein the ferrule is formed from glass or ceramic.5. The device as set forth in claim 2 , wherein the housing extends radially over the ferrule and the ferule is bonded to the housing.6. The device as set forth in claim 1 , wherein the housing is formed from glass or ceramic.7. The device as set forth in claim 1 , wherein the housing extends radially over the collimating lens and the collimating lens is bonded to the housing.8. The device as set forth in claim 1 , wherein the polarizer element comprises one of a polarizer chip or a polarizer film.9. The device as set forth in claim 1 , wherein the polarizer element is bonded to an output clear aperture of the collimating lens.10. The device as set ...

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Номер записи: 89
18-01-2018 дата публикации

Wavelength Division Multiplexer/Demultiplexer with Flexibility of Optical Adjustment

Номер: US20180017735A1
Автор: Bai Yu Sheng, Miao Rongsheng
Принадлежит:

Multiplexer and demultiplexer apparatuses are disclosed herein. In various embodiments, a demultiplexer apparatus comprises a receptacle having a collimate lens and configured to receive an inlet light, a substrate, a reflector mounted to the substrate and configured to reflect the inlet light. The reflector is either fixed or adjustable during assembly. The demultiplexer apparatus also includes a demultiplexer block coupled to the substrate and configured to receive the inlet light from the reflector and separate the inlet light into multiple wavelengths, a folding prism coupled to the substrate that receives and refracts the multiple wavelengths through the substrate, and a focal lens array coupled to the substrate to receive the focus of the multiple wavelengths. 1. An optical wavelength division demultiplexer , comprising:a receptacle having a collimate lens and configured to receive an inlet light;a substrate;a reflector mounted to the substrate and configured to reflect the inlet light;a demultiplexer block coupled to the substrate and configured to receive the inlet light from the reflector, wherein the demultiplexer block separates the inlet light into multiple wavelengths;a folding prism coupled to the substrate and configured to receive the multiple wavelengths from the demultiplexer block and refract the multiple wavelengths through the substrate; anda focal lens array coupled to the substrate substantially opposite the folding prism and configured to receive and focus the refracted multiple wavelengths.2. The optical wavelength division demultiplexer of claim 1 , wherein the reflector is a fixed reflector or an adjustably-affixed reflector.3. The optical wavelength division demultiplexer of claim 1 , wherein the reflector is either an external reflector or an internal reflector.4. The optical wavelength division demultiplexer of claim 3 , wherein a surface of the reflector is coated with at least one of a high reflective coating or a metal layer.5. The ...

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Номер записи: 90
18-01-2018 дата публикации

OPTICAL MODULE

Номер: US20180017746A1
Автор: ENYA Yohei, Ishihara Kuniaki, NAKANISHI Hiromi
Принадлежит:

An optical module includes a light-forming part and a protective member. The light-forming part includes a base member, a semiconductor light-emitting device, a lens, and a light-receiving device mounted on the base member and disposed, in the emission direction of the semiconductor light-emitting device, between the semiconductor light-emitting device and the lens. The light-receiving surface of the light-receiving device inclines toward the emission portion of the semiconductor light-emitting device such that an inclination angle θ is more than 0° and 90° or less, the inclination angle θ being an angle formed between the optical axis of the semiconductor light-emitting device and a plane including the light-receiving surface of the light-receiving device. 1. An optical module comprising:a light-forming part configured to form light; anda protective member that includes an output window configured to transmit light from the light-forming part and that is disposed so as to surround the light-forming part, a base member,', 'a semiconductor light-emitting device mounted on the base member,', 'a lens mounted on the base member and configured to convert, in terms of spot size, light emitted from the semiconductor light-emitting device, and', 'a light-receiving device that is mounted on the base member, that is disposed, in an emission direction of the semiconductor light-emitting device, between the semiconductor light-emitting device and the lens, that includes a light-receiving surface, and that is configured to directly receive, at the light-receiving surface, light from the semiconductor light-emitting device, and, 'wherein the light-forming part includes'}wherein the light-receiving surface inclines toward an emission portion of the semiconductor light-emitting device such that an inclination angle is more than 0° and 90° or less, the inclination angle being an angle formed between an optical axis of the semiconductor light-emitting device and a plane including the ...

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Номер записи: 91
18-01-2018 дата публикации

WAVELENGTH-TUNABLE TYPE ETALON COMPRISING LCD-LAYER AND PREPARATION METHOD THEREOF

Номер: US20180017824A1
Автор: SONG Jang Kun
Принадлежит: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVER SITY

The present invention relates to a wavelength-tunable type etalon comprising a liquid crystal layer, which comprises: a first substrate; a second substrate; a reflective coating film; a transparent electrode; an alignment layer, which is independently formed while covering the opposing surface of the transparent electrode; a liquid crystal layer, which is disposed in a space between each of the alignment layer s; and a sealing member, which is provided for sealing of the liquid crystal layer; and a method for manufacturing the same. 1. A wavelength-tunable type etalon comprising a liquid crystal layer , comprising:a first substrate;a second substrate;a pair of reflective coating films, which is provided at inner surface side of the first and second substrate, respectively;a pair of transparent electrodes, which is provided at intermediate of the first and second substrate;a pair of alignment layers, which is provided at intermediate of the first and second substrate;a liquid crystal layer, which is disposed in a cavity between each of the alignment layers; anda sealing member, which is provided for sealing of the liquid crystal layer.2. The wavelength-tunable type etalon of claim 1 , wherein the first and second substrates comprise at least one selected from glass claim 1 , quartz claim 1 , and silicon wafer so as to be substantially transparent in the band of 1300 nm to 1700 nm.3. The wavelength-tunable type etalon of claim 2 , wherein the alignment layer comprises an inorganic insulating film.4. The wavelength-tunable type etalon of claim 3 , wherein the inorganic insulating film comprises SiOor SiN.5. The wavelength-tunable type etalon of claim 3 , wherein the inorganic insulating film has a thickness in the range of 30 nm to 200 nm claim 3 , respectively.6. The wavelength-tunable type etalon of claim 3 , wherein the sealing member is provided along the periphery of the liquid crystal layer between the first and second substrates claim 3 , and is provided in ...

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Номер записи: 92
17-01-2019 дата публикации

ATHERMALIZED MULTI-PATH INTERFERENCE FILTER

Номер: US20190018196A1
Автор: TRITA Andrea
Принадлежит:

A multi-path interference filter. The multi-path interference filter includes a first port waveguide, a second port waveguide, and an optical structure connecting the first port waveguide and the second port waveguide. The optical structure has a first optical path from the first port waveguide to the second port waveguide, and a second optical path, different from the first optical path, from the first port waveguide to the second port waveguide. The first optical path has a portion, having a first length, within hydrogenated amorphous silicon. The second optical path has a portion, having a second length, within crystalline silicon, and the second optical path has either no portion within hydrogenated amorphous silicon, or a portion, having a third length, within hydrogenated amorphous silicon, the third length being less than the first length. 1. An arrayed waveguide grating , comprising:a first star coupler;a second star coupler;an array of waveguides connecting the first star coupler and the second star coupler;one or more first port waveguides connected to the first star coupler; andone or more second port waveguides connected to the second star coupler, a first optical path, from a first waveguide of the first port waveguides, through a first waveguide of the array of waveguides, to a first waveguide of the second port waveguides, includes a portion, having a first length, within hydrogenated amorphous silicon,', 'the remainder of the first optical path is within crystalline silicon,', 'a second optical path, from the first waveguide of the first port waveguides, through a second waveguide of the array of waveguides, to the first waveguide of the second port waveguides, includes a portion, having a second length, within hydrogenated amorphous silicon,', 'the remainder of the second optical path is within crystalline silicon, and', 'the second length is different from the first length., 'wherein2. The arrayed waveguide grating of claim 1 , wherein a rate of ...

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Номер записи: 93
19-01-2017 дата публикации

OPTICAL WAVEGUIDE, AND OPTICAL COMPONENT AND VARIABLE WAVELENGTH LASER WHICH USE THE SAME

Номер: US20170018907A1
Автор: Kobayashi Naoki, Sato Kenji
Принадлежит: NEC Corporation

Provided are: an optical waveguide that relatively easily expands a spot size and that can suppress an increase in optical coupling loss with another optical waveguide element; and an optical component and variable-wavelength laser that use the optical waveguide. The optical waveguide is provided with: a cladding member; and a core layer that is disposed within the cladding member and that is formed as an elongated body having a rectangular cross-sectional shape from a material having a higher refractive index than the material configuring the cladding member. Here, the cross-sectional shape of the core layer is characterized in having a rectangular shape in which the length in the lateral direction is at least 10 times the length in the vertical direction. 1. An optical waveguide comprising:a cladding member; anda core layer which is disposed in the cladding member and is formed into an elongated body having a rectangular cross-sectional shape from a material having a refractive index higher than that of a material constituting the cladding member, wherein{'b': '10', 'the cross-sectional shape of the core layer is a rectangle having a length in the lateral direction times or more as long as a length in the vertical direction.'}2. The optical waveguide according to claim 1 , wherein{'sub': '2', 'the cladding member is formed from SiO, and'}the core layer is formed from silicon.3. The optical waveguide according to claim 1 , wherein an end region of the core layer is formed into a tapered shape having a decreasing the length in the lateral direction.4. The optical waveguide according to claim 1 , wherein the cross-sectional shape of the core layer is a rectangle having the length in the lateral direction of 0.8 to 1.4 μm and the length in the vertical direction of 0.02 to 0.08 μm.5. An optical component comprising the optical waveguide according to .6. The optical component according to claim 5 , which is a ring oscillator claim 5 , and further comprising:two or more ...

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Номер записи: 94
21-01-2021 дата публикации

PHASED ARRAY LIDAR TRANSMITTING CHIP OF MIXED MATERIALS, MANUFACTURING METHOD THEREOF, AND LIDAR DEVICE

Номер: US20210018597A1
Автор: PAN Jiaoqing, TIAN Linyan, Wang Pengfei, WANG Qingfei, Xu Yang, YU Hongyan, ZHANG Yejin
Принадлежит:

The present disclosure provides a phased array LiDAR transmitting chip of mixed materials, a manufacturing method thereof, and a LiDAR device. The phased array LiDAR transmitting chip of mixed materials includes: a first material structure layer and an SOI silicon waveguide structure layer, the first material structure layer is optically connected to the SOI silicon waveguide structure layer through a coupling connection structure; the first material structure layer is configured to couple input light into the chip; the coupling connection structure is configured to split a light wave coupled to the chip, and couple each of split light waves into a corresponding silicon waveguide in the SOI silicon waveguide structure layer; where a non-linear refractive index of the first material in the first material structure layer is lower than a non-linear refractive index of silicon material. 1. A phased array light detection and ranging (LiDAR) transmitting chip of mixed materials , comprising: a first material structure layer and an SOI silicon waveguide structure layer , wherein an overlapping region of a rear end of the first material structure layer and a front end of the SOI silicon waveguide structure layer forms a coupling connection structure;the first material structure layer is optically connected to the SOI silicon waveguide structure layer through the coupling connection structure;the first material structure layer is configured to couple input light to the chip;the coupling connection structure is configured to split a light wave coupled into the chip, and couple each of split light waves into a corresponding silicon waveguide in the SOI silicon waveguide structure layer; anda non-linear refractive index of a first material in the first material structure layer is lower than a non-linear refractive index of a silicon material.2. The phased array LiDAR transmitting chip of mixed materials according to claim 1 , wherein the SOI silicon waveguide structure layer ...

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Номер записи: 95
21-01-2021 дата публикации

INTEGRATED TWO-DIMENSIONAL MULTI-BEAM LIDAR TRANSMITTER BASED ON BUTLER MATRIX

Номер: US20210018603A1
Автор: Chen Jianping, Liu Jiao, Lu Liangjun, Zhou Linjie, Zhu Chen
Принадлежит:

Integrated two-dimensional multi-beam LiDAR transmitter based on the Butler matrix, comprising an tunable laser array, a frequency modulated continuous wave modulator array, an N×N Butler optical matrix network, an N×M optical beam expanding network, an M-path phase shifter array, and an M-path two-dimensional LiDAR emitters. N-path narrow linewidth continuous light output by the tunable laser array passes through the frequency modulated continuous wave modulator array to generate N-path frequency modulated continuous light signals; after processed by the N×N Butler matrix and the N×M optical beam expanding network, energy of each path of the frequency modulated continuous optical signal is evenly distributed to the M-path output ports, and the M-path phase shifter array generates equal-difference phases with continuously tunable phase differences for M-path optical signals, which, with continuously tunable phase differences, are transmitted by M-path two-dimensional LiDAR emitters to realize no more than N different two-dimensional steerable transmitting optical beams. 1. An integrated two-dimensional multi-beam LiDAR transmitter based on a Butler matrix , comprisinga tunable laser array,a frequency modulated continuous wave modulator array,an N×N Butler optical matrix network,an N×M optical beam expanding network,an M-path phase shifter array, andan M-path two-dimensional LiDAR emitters,wherein the tunable laser array is a narrow linewidth laser array, and N-path narrow linewidth continuous light output by the tunable laser array passes through the frequency modulated continuous wave modulator array to generate N-path frequency modulated continuous wave signals;after being processed by the N×N Butler matrix network and the N×M optical beam expanding network, the energy of each path of the frequency modulated continuous optical signal is evenly distributed to M-path output ports, and output signals of adjacent output ports have equal phase differences;the M-path ...

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Номер записи: 96
21-01-2021 дата публикации

PROCESSING TECHNOLOGY FOR SINGLE-COLUMN AND MULTI-ROW EQUIVALENT NEGATIVE REFRACTIVE INDEX PLATE LENS

Номер: US20210018658A1
Автор: FAN Chao, HAN Dongcheng, ZHANG Liangliang
Принадлежит: ANHUI DONGCHAO SCIENCE AND TECHNOLOGY COMPANY LIMITED

Provided is a processing method for a single-column and multi-row equivalent negative refractive flat lens, including: processing an optical material into parallel plates including upper and lower surfaces each being a polished surface; cutting the parallel plates into strip-shaped optical waveguides; plating each polished surface with an aluminum film; attaching and gluing the surfaces together to form a single-column and multi-row strip-shaped optical waveguide array; curing the strip-shaped optical waveguide array through heating treatment; cutting the plate of the strip-shaped optical waveguide array into two sets of plates of strip-shaped optical waveguide array arranged in a direction of 45 degrees; and gluing the two sets of plates in such a manner that arrangement directions of the two sets of plates are perpendicular to each other, and then adding protective window sheets on both sides of the glued plates. 1. A processing method of a single-column and multi-row equivalent negative refractive flat lens , comprising:processing an optical material into parallel plates, the parallel plates comprising upper and lower surfaces each being a polished surface;cutting the parallel plates into strip-shaped optical waveguides along one edge thereof, each of the strip-shaped optical waveguides having a length greater than 10 mm and smaller than 200 mm, a width greater than 0.1 mm and smaller than 5 mm, and a thickness greater than 0.1 mm and smaller than 5 mm;plating each of two polished surfaces of each of the strip-shaped optical waveguides with an aluminum film;attaching and gluing the surfaces plated with the aluminum film of the strip-shaped optical waveguides together to form a single-column and multi-row strip-shaped optical waveguide array;taking out the optical waveguide array, and curing the strip-shaped optical waveguide array through heating treatment to form a plate of the strip-shaped optical waveguide array;processing two surfaces of the plate of the ...

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Номер записи: 97
21-01-2021 дата публикации

Tunable filter and optical communication apparatus

Номер: US20210018663A1
Автор: Yasuki Sakurai
Принадлежит: Santec Corp

A tunable filter includes: a first transparent substrate including a first reflective surface; a second transparent substrate including a second reflective surface that opposes the first reflective surface; and a supporting member, connected to the first transparent substrate, that supports the second transparent substrate on the first transparent substrate so that the second reflective surface is disposed at a position separated from the first reflective surface in a normal direction of the first reflective surface. A cavity between the first reflective surface and the second reflective surface forms an etalon. A relative position of the second transparent substrate with respect to the first transparent substrate changes due to thermal expansion of the supporting member, and a length of the cavity changes in the normal direction.

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Номер записи: 98
03-02-2022 дата публикации

Wavelength division multiplexing with parallel arrayed signal paths for increased channel density

Номер: US20220038201A1
Автор: Qijun Xiao
Принадлежит: Alliance Fiber Optic Products Co Ltd

Disclosed herein is wavelength-division multiplexing (WDM) and demultiplexing with signal entry and exit in a common routing surface to increase channel density. In particular, disclosed is a WDM assembly including a plurality of common ports and a plurality of channel sets having one or more channel ports. The WDM assembly includes a first routing surface with a first WDM passband and a second routing surface offset from the first routing surface. The second routing surface is configured to reflect at least one signal passed through the first routing surface back through the first routing surface at a laterally different location. Optical signal paths of at least a portion of the common ports are parallel to and offset from one another. In certain embodiments, such a configuration may increase channel density and decrease a form factor (e.g., footprint).

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Номер записи: 99
21-01-2021 дата публикации

ENDOSCOPIC LED LIGHT SOURCE HAVING A FEEDBACK CONTROL SYSTEM

Номер: US20210018703A1
Автор: FEINGOLD Benjamin Hyman, HUI Simon S., NAMBAKAM Vasudev
Принадлежит: STRYKER CORPORATION

A method for providing light to an endoscope includes emitting light from a plurality of light emitting diodes, filtering the light with a plurality of dichroic filter elements, collimating and mixing light received from the dichroic filter elements into a combined light, sensing the combined light at a color sensor and determining a sensed color balance of the combined light, comparing the sensed color balance with a predetermined color balance, and varying at least one power signal to control a light intensity output by at least one of the plurality of light emitting diodes so that the sensed color balance corresponds to the predetermined color balance. 1. (canceled)2. A method for providing light to an endoscope , the method comprising:emitting light from a plurality of light emitting diodes;filtering the light with a plurality of dichroic filter elements;collimating and mixing light received from the dichroic filter elements into a combined light;sensing the combined light at a color sensor and determining a sensed color balance of the combined light;comparing the sensed color balance with a predetermined color balance; andvarying at least one power signal to control a light intensity output by at least one of the plurality of light emitting diodes so that the sensed color balance corresponds to the predetermined color balance.3. The method of claim 2 , wherein the plurality of light emitting diodes comprises at least one each of red claim 2 , green and blue light emitting diodes.4. The method of claim 2 , wherein the plurality of light emitting diodes comprises a combination of white and red light emitting diodes.5. The method of claim 2 , comprising conveying the combined light to the color sensor via at least one optical fiber.6. The method of claim 2 , wherein the color sensor is located in an illuminator that comprises the plurality of light emitting diodes.7. The method of claim 2 , wherein the color sensor comprises an image sensor of an endoscopic camera ...

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Номер записи: 100