Diffraction Grating (e.g., Bragg) Patents (Class 385/10)
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Patent number: 10247851Abstract: A hybrid fiber optic assembly and system for use in a well, where the system includes a hybrid fiber optic cable with at least a first transmission region and at least a first sensory region as well as an interrogator system coupled to the hybrid fiber optic cable. The hybrid fiber optic cable can have a plurality of transmission regions and sensory regions, as well as transition regions in between and coupling individual pairs of transmission regions and sensory regions.Type: GrantFiled: August 25, 2014Date of Patent: April 2, 2019Assignee: Halliburton Energy Services, Inc.Inventors: Jason Edward Therrien, John L. Maida, David Barfoot
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Patent number: 10191239Abstract: An assembly for breaking out hybrid power/fiber cable, comprising: a hybrid power/fiber cable comprising a plurality of conductors and a plurality of optical fibers, wherein first lengths of the conductors and the optical fibers are circumferentially surrounded by an armor layer, and wherein a portion of the armor layer is circumferentially surrounded by a cable jacket, and wherein second lengths of the conductors and the optical fibers are free of the armor layer and the cable jacket; a breakout sleeve having an internal bore, a portion of the cable jacket and a portion of the armor layer residing in the internal bore, and portions of the second lengths of the conductors and optical fibers residing in the internal bore; wherein the sleeve is fixed to the cable jacket.Type: GrantFiled: August 23, 2017Date of Patent: January 29, 2019Assignee: CommScope Technologies LLCInventor: Nahid Islam
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Patent number: 10156769Abstract: A two-dimensional (2D) beam steering device may include a variable refractive index panel configured to generate a prism effect, a waveguide in contact with a surface of the variable refractive index panel, and an electro-optic prism disposed on a surface of the waveguide. The variable refractive index panel may include a variable refractive index layer, a common electrode layer, and an electrode pattern layer. The common electrode layer and the electrode pattern layer may face each other with the variable refractive index layer therebetween.Type: GrantFiled: January 13, 2017Date of Patent: December 18, 2018Assignee: SAMSUNG ELELCTRONICS CO., LTD.Inventors: Jungwoo Kim, Changgyun Shin, Sunil Kim
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Patent number: 10156681Abstract: An optical waveguide display comprises: a waveguide; a source of light modulated with temporally-varying angularly-distributed information; a fold grating providing a first beam expansion; an input coupler for directing light into total internal reflection paths in a first propagation direction; and an output grating for providing a second beam expansion and extracting light from the waveguide. The input light undergoes at least two diffractions within the fold grating, each diffraction directing light into a unique total internal reflection angular range along a second propagation direction.Type: GrantFiled: November 8, 2017Date of Patent: December 18, 2018Assignees: DigiLens Inc., Rockwell Collins Inc.Inventors: Jonathan David Waldern, Alastair John Grant, Milan Momcilo Popovich, James H. Stanley, Robert D. Brown
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Patent number: 10126499Abstract: An electro-optic device may include a photonic chip having an optical grating coupler at a surface. The optical grating coupler may include a first semiconductor layer having a first base and first fingers extending outwardly from the first base. The optical grating coupler may include a second semiconductor layer having a second base and second fingers extending outwardly from the second base and being interdigitated with the first fingers to define semiconductor junction areas, with the first and second fingers having a non-uniform width. The electro-optic device may include a circuit coupled to the optical grating coupler and configured to bias the semiconductor junction areas and change one or more optical characteristics of the optical grating coupler.Type: GrantFiled: June 30, 2015Date of Patent: November 13, 2018Assignees: STMICROELECTRONICS SA, STMICROELECTRONICS (CROLLES 2) SASInventors: Jean-Robert Manouvrier, Jean-Francois Carpentier, Patrick Lemaitre
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Patent number: 10089516Abstract: A contact image sensor having an illumination source; a first SBG array device; a transmission grating; a second SBG array device; a waveguiding layer including a multiplicity of waveguide cores separated by cladding material; an upper clad layer; and a platen. The sensor further includes: an input element for coupling light from the illumination source into the first SBG array; a coupling element for coupling light out of the cores into output optical paths coupled to a detector having at least one photosensitive element.Type: GrantFiled: August 7, 2017Date of Patent: October 2, 2018Assignee: DigiLens, Inc.Inventors: Milan Momcilo Popovich, Jonathan David Waldern
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Patent number: 10088630Abstract: The optical device coupleable to a waveguide to receive an optical signal from the waveguide generally has at least two diffraction grating devices optically coupled to one another and having corresponding spectral responses, the spectral response of at least one of said diffraction grating devices being tunable to adjust an amount of overlapping between the spectral responses of the at least two diffraction grating devices.Type: GrantFiled: March 17, 2016Date of Patent: October 2, 2018Assignee: UNIVERSITÉ LAVALInventor: Wei Shi
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Patent number: 10075688Abstract: In an example, the present invention provides an optical engine apparatus. The apparatus has a laser diode device, the laser diode device characterized by a wavelength ranging from 300 to 2000 nm or any variations thereof. In an example, the apparatus has a lens coupled to an output of the laser diode device and a scanning mirror device operably coupled to the laser diode device. In an example, the apparatus has an un-patterned phosphor plate coupled to the scanning mirror and configured with the laser device; and a spatial image formed on a portion of the un-patterned phosphor plate configured by a modulation of the laser and movement of the scanning mirror device.Type: GrantFiled: October 9, 2017Date of Patent: September 11, 2018Assignee: Soraa Laser Diode, Inc.Inventors: Vlad Joseph Novotny, Paul Rudy
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Patent number: 10067363Abstract: Embodiments provide a polarizer and a polarization modulation system. The polarizer includes at least one MMI multi-mode waveguide, where one side of each MMI multi-mode waveguide is connected to an input waveguide, and the other side is connected to an output waveguide. An end portion of the side, on which the output waveguide is located, of the MMI multi-mode waveguide is provided with an adjustable portion, and the adjustable portion is connected to the output waveguide. The polarizer further includes a controller connected to the adjustable portion, where the controller is configured to perform control to change a material property of the adjustable portion, so that the output waveguide outputs optical signals in different polarization states.Type: GrantFiled: June 20, 2016Date of Patent: September 4, 2018Assignee: Huawei Technologies Co., LtdInventors: Xin Tu, Hongyan Fu, Wanyuan Liu
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Patent number: 10025170Abstract: Disclosed are an apparatus and method for reducing interference for a near-eye display device. The near-eye display device includes an imager, a spatial light modulator and a waveguide. The imager generates an image based on light from a coherent light source. The spatial light modulator modulates phases of a plurality of coherent light rays representing the image received from the imager. The waveguide receives and guides the light rays having varied phases such that light rays propagating within the waveguide are incoherent with each other.Type: GrantFiled: June 13, 2016Date of Patent: July 17, 2018Assignee: Microsoft Technology Licensing, LLCInventors: Jani Kari Tapio Tervo, Tuomas Heikki Sakari Vallius, Seppo Kalevi Honkanen
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Patent number: 9921256Abstract: Disclosed are various embodiments for field strength monitoring of electromagnetic fields generated by a guided surface waveguide probe. A field meter measures the field strength of the electromagnetic field. The field meter communicates the measured field strength to a probe control system coupled to the guided surface waveguide probe. Adjustments can be made to one or more operational parameters of the guided surface waveguide probe according to the measured field strength.Type: GrantFiled: September 8, 2015Date of Patent: March 20, 2018Assignee: CPG TECHNOLOGIES, LLCInventors: James F. Corum, Kenneth L. Corum, James D. Lilly, Joseph F. Pinzone
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Patent number: 9891355Abstract: A retroreflector device is described, which includes a lens component operable for focusing radiation, which is incident thereto at an angle of incidence. The retroreflector also includes a mirror component operable for reflecting the radiation focused by the lens component back along the angle of incidence. The lens component and/or the mirror component includes a quasi-periodic array of elements, each of which comprises a dimension smaller than a wavelength of the radiation.Type: GrantFiled: April 26, 2016Date of Patent: February 13, 2018Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Amir Arbabi, Andrei Faraon
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Patent number: 9893494Abstract: A laser system including a seed laser and an optical amplification subsystem, receiving an output of the seed laser and providing an amplified laser output, the optical amplification subsystem including a first plurality of amplifier assemblies, each of the first plurality of amplifier assemblies including a second plurality of optical amplifiers, and phase control circuitry including phase modulating functionality associated with each of the first plurality of amplifier assemblies.Type: GrantFiled: January 13, 2017Date of Patent: February 13, 2018Assignee: CIVAN ADVANCED TECHNOLOGIES LTD.Inventor: Eyal Shekel
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Patent number: 9787963Abstract: In an example, the present invention provides an optical engine apparatus. The apparatus has a laser diode device, the laser diode device characterized by a wavelength ranging from 300 to 2000 nm or any variations thereof. In an example, the apparatus has a lens coupled to an output of the laser diode device and a scanning mirror device operably coupled to the laser diode device. In an example, the apparatus has an un-patterned phosphor plate coupled to the scanning mirror and configured with the laser device; and a spatial image formed on a portion of the un-patterned phosphor plate configured by a modulation of the laser and movement of the scanning mirror device.Type: GrantFiled: October 8, 2015Date of Patent: October 10, 2017Assignee: Soraa Laser Diode, Inc.Inventors: Vlad Joseph Novotny, Paul Rudy
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Patent number: 9726540Abstract: There is provided a diffractive waveguide device comprising: a light source, at least one light detector, an SBG device comprising a multiplicity of separately switchable SBG elements sandwiched between transparent substrate to which transparent electrodes have been applied. The substrates function as a light guide. Each SBG element encodes image information to be projected on an image surface. Each SBG element when in a diffracting state diffracts light out of the light guide to form an image region on an image surface. The light detector detects light scattered from an object disposed in proximity to the image surface and illuminated by said image region.Type: GrantFiled: May 26, 2015Date of Patent: August 8, 2017Assignee: DIGILENS, INC.Inventors: Milan Momcilo Popovich, Jonathan David Waldern
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Patent number: 9711930Abstract: An apparatus includes a curved multimode polymer waveguide having at least one inflection point and a doped region being doped with an amplifying dopant. An optical pump source or electrical pump source is configured to excite the doped region and amplify the optical signal transmitting along the curved multimode polymer waveguide.Type: GrantFiled: December 1, 2015Date of Patent: July 18, 2017Assignee: Seagate Technology LLCInventors: Richard C. A. Pitwon, Alexander C. Worrall
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Patent number: 9693707Abstract: A shape sensing device, system and method include an interventional instrument (102) having regions of articulation to be configured to change shape during an interventional procedure. An optical fiber (202) is disposed on or about the areas of articulation in a pattern to provide an optical signal indicating an instantaneous change or current position or orientation of the instrument. A signal interpretation module (115) is configured to receive the optical signals and interpret the instantaneous change or current position or orientation of the instrument.Type: GrantFiled: January 25, 2012Date of Patent: July 4, 2017Assignee: Koninklijke Philips N.V.Inventors: Raymond Chan, Robert Manzke, Aleksandra Popovic, Gert Wim 'T Hooft, Heinrich Von Busch
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Patent number: 9664931Abstract: An electro-optic modulation structure comprises a first electrode and a second electrode and a first electro-optic strip; wherein the first electrode has a slab portion and a first ridge protruding from the slab portion of the first electrode, and the second electrode has a slab portion and a first ridge protruding from the slab portion of the second electrode, the first protruding ridge of the first electrode and the first protruding ridge of the second electrode being disposed on opposite sides of the first electro-optic strip and both protruding ridges abut the first electro-optic strip.Type: GrantFiled: November 15, 2013Date of Patent: May 30, 2017Assignee: HRL Laboratories, LLCInventors: Daniel Yap, James H. Shaffner
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Patent number: 9632281Abstract: A free space coupling system comprising a waveguide horizontally positioned on an integrated circuit, and a silicon housing coupled to the waveguide, wherein the silicon housing comprises a reflective surface, a first port, wherein the first port is configured to receive light from an optic source positioned substantially parallel to the waveguide at a coupling point, and a second port, wherein the second port is oriented at about ninety degrees with respect to the first port, and wherein the second port is aligned with a grating port on the waveguide.Type: GrantFiled: March 13, 2014Date of Patent: April 25, 2017Assignee: Futurewei Technologies, Inc.Inventors: Rongsheng Miao, Zongrong Liu, Qianfan Xu, Xiao Shen
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Patent number: 9634462Abstract: An example apparatus includes an optical fiber including a core and cladding, the core being situated to propagate an optical beam along a propagation axis associated with the core, and at least one fiber Bragg grating (FBG) situated in the core of the optical fiber, the fiber Bragg grating including a plurality of periodically spaced grating portions situated with respect to the propagation axis so that light associated with Raman scattering is directed out of the core so as to reduce the generation of optical gain associated with stimulated Raman scattering (SRS).Type: GrantFiled: October 15, 2015Date of Patent: April 25, 2017Assignee: nLIGHT, Inc.Inventors: Dahv A.V. Kliner, Timothy S. McComb
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Patent number: 9632226Abstract: An optical waveguide comprises at least two TIR surface and contains a grating. Input TIR light with a first angular range along a first propagation direction undergoes at least two diffractions at the grating. Each diffraction directs light into a unique TIR angular range along a second propagation direction.Type: GrantFiled: February 12, 2015Date of Patent: April 25, 2017Assignees: DIGILENS INC., ROCKWELL COLLINS INC.Inventors: Jonathan David Waldern, Alastair John Grant, Milan Momcilo Popovich, James H. Stanley, Robert D. Brown
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Patent number: 9606291Abstract: Integrated optical structures include a first wafer layer, a first insulator layer directly connected to the top of the first wafer layer, a second wafer layer directly connected to the top of the first insulator layer, a second insulator layer directly connected to the top of the second wafer layer, and a third wafer layer directly connected to the top of the second insulator layer. Such structures include: a first optical waveguide positioned within the second wafer layer; an optical coupler positioned within the second wafer layer, the second insulator layer, and the third wafer layer; and a second optical waveguide positioned within the third wafer layer. The optical coupler transmits an optical beam from the first optical waveguide to the second optical waveguide through the second insulator layer.Type: GrantFiled: June 25, 2015Date of Patent: March 28, 2017Assignee: GLOBALFOUNDRIES INC.Inventors: John J. Ellis-Monaghan, Brendan S. Harris, Vibhor Jain, Yves T. Ngu, Sebastian T. Ventrone
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Patent number: 9584224Abstract: A laser system including a seed laser and an optical amplification subsystem, receiving an output of the seed laser and providing an amplified laser output, the optical amplification subsystem including a first plurality of amplifier assemblies, each of the first plurality of amplifier assemblies including a second plurality of optical amplifiers, and phase control circuitry including phase modulating functionality associated with each of the first plurality of amplifier assemblies.Type: GrantFiled: May 30, 2011Date of Patent: February 28, 2017Assignee: CIVAN ADVANCED TECHNOLOGIES LTD.Inventor: Eyal Shekel
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Patent number: 9551596Abstract: A manufacturing method for a high-temperature-resistant metal-packaged fiber Bragg grating sensor includes using a regenerated fiber Bragg grating obtained via high-temperature annealing as a sensitive element so that the grating will not be erased when used at high temperature. The method also includes using a magnetron sputtering method which makes an optical fiber and metal combine better to form on the surface of the optical fiber an adhesive layer and a conductive layer, thereby causing little damage to optical fiber because of the absence of the processes of coarsening, sensitization, etc. of electroless plating and the fact that the method is performed in an anhydrous environment. After magnetron sputtering, the method includes using an electroplating method to thicken and deposit a protective layer, and embedding the optical fiber in a flexible-structure metallic substrate through the electroplating method to achieve the all-metal package.Type: GrantFiled: November 19, 2012Date of Patent: January 24, 2017Assignee: East China University of Science and TechnologyInventors: Shandong Tu, Yun Tu, Yihua Qi, Peng Han, Xiancheng Zhang, Fuzhen Xuan
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Patent number: 9519163Abstract: A photonic integrated circuit (PIC) is described. This PIC includes a grating coupler for surface-normal coupling that has an alternating pattern of grating teeth and grating trenches, where the grating trenches are filled with an electro-optical material. By applying an electric potential to the grating teeth, the index of refraction of the electro-optical material can be modified.Type: GrantFiled: September 24, 2013Date of Patent: December 13, 2016Assignee: ORACLE INTERNATIONAL CORPORATIONInventors: Xuezhe Zheng, Jin Yao, Guoliang Li, Ying L. Luo, John E. Cunningham, Ashok V. Krishnamoorthy
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Patent number: 9511448Abstract: A laser machining system for machining a work-piece includes a laser scanning head, external optical subsystems, and an image acquisition device. The external optical subsystems correspond to optical channels that include a first optical channel and a second optical channel. The laser scanning head controls an optical path so that a laser beam is directed and focused on the work-piece through the first optical channel and the second optical channel at different times. The first optical channel and the second optical channel correspond to respective specific portions of the work-piece to be machined by the laser beam. The image acquisition device is positioned to view the work-piece through the optical path. The image acquisition device acquires via the first optical channel one or more images of the work-piece to determine a displacement of the work-piece with reference to a best optical focus position of the second optical channel.Type: GrantFiled: August 10, 2015Date of Patent: December 6, 2016Assignee: RESONETICS, LLCInventors: Pascal Miller, Sergey V. Broude, David L. Wall, Kenneth Todd McDaniel, David S. Holbrook
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Patent number: 9435964Abstract: In various embodiments, a beam-parameter adjustment system and focusing system alters a spatial power distribution of a radiation beams before the beam is coupled into an optical fiber or delivered to a workpiece.Type: GrantFiled: June 23, 2015Date of Patent: September 6, 2016Assignee: TeraDiode, Inc.Inventors: Parviz Tayebati, Wang-Long Zhou, Bien Chann, Bryan Lochman
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Patent number: 9417416Abstract: An optoelectrical composite cable includes an optical fiber; a resin inner cylinder that accommodates the optical fiber; a plurality of electrical lines arranged outside the inner cylinder so as to cover a surrounding of the inner cylinder, and a tubular outer cylinder that collectively covers the plurality of electrical lines. The plurality of electrical lines include pairs of electrical lines, and the electrical lines constitute at least one of the pairs of electrical lines have a larger outer diameter than the other electrical lines and are arranged at opposing positions, with the inner cylinder being interposed therebetween.Type: GrantFiled: March 13, 2014Date of Patent: August 16, 2016Assignee: HITACHI METALS, LTD.Inventors: Hiroki Yasuda, Kouki Hirano, Hiroshi Sakaguchi
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Patent number: 9335568Abstract: An optical-waveguide grating modulator is compatible with high-frequency electrical modulation signals of limited bandwidth. The modulator comprises an optical grating formed in an optical waveguide constructed from electro-optic (EO) material and an electrode that is an RF waveguide or RF transmission line that conducts a traveling-wave electromagnetic (EM) field and that contains a portion of the optical-grating waveguide with a continuous grating. The RF input modulation signal is coupled into an RF EM field that propagates through the RF waveguide or transmission line in a direction that is parallel to the direction the light propagates in the optical-grating waveguide and that EM field overlaps the optical-grating waveguide. The light travels along the optical-grating waveguide preferably at the same velocity as the RF EM field travels along the RF waveguide or transmission line.Type: GrantFiled: June 2, 2011Date of Patent: May 10, 2016Assignee: HRL Laboratories, LLCInventors: Daniel Yap, Oleg M. Efimov, James H. Schaffner
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Patent number: 9105979Abstract: An apparatus to modify an incident free space electromagnetic wave includes a block of an artificially structured material having an adjustable spatial distribution of electromagnetic parameters (e.g., ?, ?, ?, ?, and n). A controller applies control signals to dynamically adjust the spatial distribution of electromagnetic parameters in the material to introduce a time-varying path delay d(t) in the modified electromagnetic wave relative to the incident electromagnetic wave.Type: GrantFiled: October 22, 2010Date of Patent: August 11, 2015Inventors: Jeffrey A. Bowers, Roderick A. Hyde, Jordin T. Kare, Nathan Kundtz, Bruce Marshall McWilliams, John Brian Pendry, David Schurig, David R. Smith, Anthony F. Starr, Clarence T. Tegreene, Lowell L. Wood, Jr.
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Patent number: 9105978Abstract: An apparatus to modify an incident free space electromagnetic wave includes a block of an artificially structured material having an adjustable spatial distribution of electromagnetic parameters (e.g., ?, ?, ?, ?, and n). A controller applies control signals to dynamically adjust the spatial distribution of electromagnetic parameters in the material to introduce a time-varying path delay d (t) in the modified electromagnetic wave relative to the incident electromagnetic wave.Type: GrantFiled: October 22, 2010Date of Patent: August 11, 2015Inventors: Jeffrey A. Bowers, Roderick A. Hyde, Jordin T. Kare, Nathan Kundtz, Bruce Marshall McWilliams, John Brian Pendry, David Schurig, David R. Smith, Anthony F. Starr, Clarence T. Tegreene, Lowell L. Wood, Jr.
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Patent number: 9075184Abstract: There is provided a projection display device comprising: a light source, an SBG device comprising a multiplicity of separately SBG elements sandwich between transparent substrate to which transparent electrodes have been applied. The substrates function as a light guide. A least one transparent electrode comprises plurality of independently switchable transparent electrodes elements, each electrode element substantially overlaying a unique SBG element. Each SBG element encodes image information to be projected on an image surface. Light coupled into the light guide, undergoes total internal reflection until diffracted out to the light guide by an activated SBG element. The SBG diffracts light out of the light guide to form an image region on an image surface when subjected to an applied voltage via said transparent electrodes.Type: GrantFiled: April 17, 2012Date of Patent: July 7, 2015Inventors: Milan Momcilo Popovich, Jonathan David Waldern
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Publication number: 20150147020Abstract: An external resonator type light emitting system includes a light source oscillating a semiconductor laser light and a grating device providing an external resonator with the light source. The light source includes an active layer oscillating the semiconductor laser light. The grating device includes an optical waveguide having an incident face to which the semiconductor laser is incident and an emitting face of emitting an emitting light of a desired wavelength, a Bragg grating formed in the optical waveguide, and a propagating portion provided between the incident face and the Bragg grating. Formulas (1) to (4) are satisfied.Type: ApplicationFiled: April 22, 2014Publication date: May 28, 2015Applicant: NGK INSULATORS, LTD.Inventors: Jungo Kondo, Shoichiro Yamaguchi, Takashi Yoshino, Yukihisa Takeuchi
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Publication number: 20150125109Abstract: Grating configurations are described for creating time sequenced field of view (FOV) tiles for a waveguide display. Pairings of non-output diffraction gratings and output diffraction gratings are activated to create a number of FOV tiles in a time sequence, for example in a frame update period for the image. Examples of a non-output grating are an input grating and a fold grating. For a set of at least three gratings used to make the pairings, each non-output grating is paired with each output grating. The number of pairings, and so the number of FOV tiles, is equal to a product of the total number of non-output gratings and the total number of output gratings. At least one diffraction grating in the pairing is an active pairing. Also described is a multiplexed diffraction grating including multiplexed K-vectors which increases the overall angular bandwidth for both incidence and diffraction.Type: ApplicationFiled: November 6, 2013Publication date: May 7, 2015Inventors: Steve J. Robbins, Ian A. Nguyen
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Patent number: 9002143Abstract: A tunable Radio Frequency (RF) filter device includes a tunable optical source configured to generate an optical carrier signal, and a modulator coupled to the tunable optical source and configured to modulate the optical carrier signal with an RF input signal. The tunable RF filter device may also include first and second optical waveguides coupled to the modulator and having first and second dispersion slopes of opposite sign, and an optical-to-electrical converter coupled to the first and second optical waveguides and configured to generate an RF output signal with a frequency notch therein based upon the tunable optical source.Type: GrantFiled: September 17, 2014Date of Patent: April 7, 2015Assignee: Harris CorporationInventors: Richard Desalvo, Charles Franklin Middleton, IV
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Patent number: 8989528Abstract: Systems and methods comprise or involve optical fibers having Bragg gratings. The optical fibers can be assembled in a parallel manner into a fiber sensor configuration. Bragg gratings can be written onto different cores of optical fibers. Bragg gratings may be written at a same or nearly same axial position for all optical fibers in the configuration and may be written at the same time and may have a substantially equal index of refraction variation and unequal lengths. Spaced Bragg gratings may also have characteristic sidelobe spectrums for tagging the respective gratings. Gratings can also be written at different wavelengths and over another grating at the same location.Type: GrantFiled: September 23, 2008Date of Patent: March 24, 2015Assignee: Hansen Medical, Inc.Inventor: Eric Udd
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Publication number: 20150071584Abstract: In order to prevent non-uniformity in emission wavelength among different sites along an optical axis direction, provided is a resonator portion including: a waveguide which includes at least two areas where an effective refraction index varies in the optical axis direction; and diffraction gratings formed along the optical axis direction of the waveguide. The diffraction grating that is formed in one of the at least two areas of the waveguide where the effective refraction index is large has a pitch narrower than a pitch of the diffraction grating that is formed in another of the at least two areas of the waveguide where the effective refraction index is small.Type: ApplicationFiled: September 9, 2014Publication date: March 12, 2015Inventors: Norihito KOSUGI, Syunya YAMAUCHI, Yoriyoshi YAMAGUCHI
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Patent number: 8971671Abstract: A tunable Radio Frequency (RF) filter device includes a tunable optical source generating an optical carrier signal, and a modulator coupled to the tunable optical source and modulating the optical carrier signal with an RF input signal. The tunable RF filter device may include first and second optical waveguide paths coupled to the modulator and having first and second dispersion slopes of opposite sign from each other, one or more of the first and second optical waveguide paths comprising an optical splitter and combiner pair therein, and an optical-to-electrical converter coupled to the first and second optical waveguide paths and generating an RF output signal with a frequency notch therein based upon the tunable optical source.Type: GrantFiled: July 25, 2011Date of Patent: March 3, 2015Assignee: Harris CorporationInventors: Richard DeSalvo, Charles Middleton
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Publication number: 20150010264Abstract: An optical semiconductor device is provided as one achieving reduction of power in phase control. The optical semiconductor device has: a first optical waveguide having a plurality of segments each of which has a diffraction grating region with a diffraction grating and a space portion coupled to the diffraction grating region, having two ends interposed between the diffraction grating regions, and having a constant optical length, wherein at least one of the segments is provided with a phase shift structure; a first phase control device for adjusting a phase of light in each segment with the phase shift structure; and a second phase control device for adjusting a phase of light in each segment without the phase shift structure.Type: ApplicationFiled: June 26, 2014Publication date: January 8, 2015Inventor: Toshimitsu KANEKO
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Publication number: 20150010265Abstract: A contact image sensor having: an illumination; a first SBG array device; a transmission grating; a second SBG array device; a waveguiding layer having a multiplicity of waveguide cores separated by cladding material; an upper clad layer; and a platen. The sensor also including an optical device for coupling light from an illumination source into the first SBG array; and an optical coupler for coupling light out of the cores into output optical paths coupled to a detector having at least one photosensitive element.Type: ApplicationFiled: January 7, 2013Publication date: January 8, 2015Inventors: Milan, Momcilo POPOVICH, Jonathan, David WALDERN
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Patent number: 8909012Abstract: A hybrid cable includes a guide in the center of the cable, elements stranded side-by-side with one another around the guide, fiber optic elements including optical fibers, a metal armor, and a polymeric jacket of the cable surrounding the metal armor. The elements stranded side-by-side with one another around the guide include electrical-conductor elements, which themselves include stranded metal wires insulated in a jacket of the electrical-conductor elements. The electrical-conductor elements are round and have the same diameter as one another. Furthermore, the electrical-conductor elements are each within the range of 10 American wire gauge (AWG) to 1\0 AWG. The fiber optic elements may be included in or integrated with the group of elements stranded side-by-side with one another around the guide. The metal armor surrounds the elements stranded side-by-side with one another around the guide, and serves as a grounding conductor and an electro-magnetic interference shield.Type: GrantFiled: March 6, 2013Date of Patent: December 9, 2014Assignee: Corning Cable Systems LLCInventors: James Arthur Register, III, David Henry Smith
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Patent number: 8897607Abstract: A tunable Radio Frequency (RF) filter device includes a tunable optical source configured to generate an optical carrier signal, and a modulator coupled to the tunable optical source and configured to modulate the optical carrier signal with an RF input signal. The tunable RF filter device may also include first and second optical waveguides coupled to the modulator and having first and second dispersion slopes of opposite sign, and an optical-to-electrical converter coupled to the first and second optical waveguides and configured to generate an RF output signal with a frequency notch therein based upon the tunable optical source.Type: GrantFiled: July 25, 2011Date of Patent: November 25, 2014Assignee: Harris CorporationInventors: Richard DeSalvo, Charles Middleton
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Patent number: 8865078Abstract: An apparatus for detecting an object capable of emitting light. The apparatus includes a light source and a waveguide. The waveguide includes a core layer and a first cladding layer. At least one nanowell is formed in at least the first cladding layer. The apparatus further includes a light detector. The light detector can detect a light emitted from a single molecule object contained in the at least one nanowell.Type: GrantFiled: July 29, 2010Date of Patent: October 21, 2014Assignee: Industrial Technology Research InstituteInventors: Chung-Fan Chiou, Rung-Ywan Tsai, Yu-Tang Li, Chih-Tsung Shih, Ming-Chia Li, Chang-Sheng Chu, Shuang-Chao Chung, Jung-Po Chen, Ying-Chih Pu
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Patent number: 8842956Abstract: A non-kink, non-hockling optical cable comprising an optical fiber capable of propagating light along its longitudinal axis. A buffer layer made of a soft plastic material surrounds the silica core and cladding, and a supplemental layer surrounds the buffer layer. The supplemental layer consists essentially of a liquid crystal polymer (LCP) material to enhance the tensile strength of the optical fiber. Finally, an encasing polymer layer with a breaking strain greater than 30%, surrounds the supplemental layer, to increase the flexibility of the optical cable.Type: GrantFiled: March 20, 2012Date of Patent: September 23, 2014Assignee: Linden Photonics, Inc.Inventors: Stephen M. O'Riorden, Amaresh Mahapatra
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Patent number: 8805136Abstract: A method and apparatus for tunable on-fiber Bragg gratings for DWDM and other applications on a small section of the core of single mode communication of an optical fiber. The method comprises etching most of the cladding on a small section of the fiber; coating the etched portion with a metallic electrode material and then with a layer of an electrooptic material; coating the electrooptic material with a photoresist; producing the Bragg grating pattern using a holographic process or on-axis interferometry; dissolving the non-exposed photoresist,; etching the grating pattern into the electrooptic material, and coating the Bragg gratings with a metallic material constructing the outer electrode. The presence of an electric signal on the electrodes will change the optical properties of the electrooptic material, as well as the diffraction/reflection properties of the Bragg gratings.Type: GrantFiled: May 8, 2006Date of Patent: August 12, 2014Assignee: Photonics On-Fiber Devices, Inc.Inventor: Mahmoud A. El-Sherif
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Patent number: 8798414Abstract: A deterministic design and manufacturing of an ultrahigh Q-factor, wavelength-scale optical cavity is invented and experimentally demonstrated. The design can be implemented on photonic crystal nanobeam cavities, which are based on 1D optical waveguides. The waveguide has dielectric index alternations that provide constructive interference and produces optical resonance.Type: GrantFiled: September 29, 2011Date of Patent: August 5, 2014Assignee: President and Fellows of Harvard CollegeInventors: Qimin Quan, Marko Loncar
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Patent number: 8766092Abstract: An energy collection system is provided. The system can include an energy collection device and an energy concentration device disposed proximate at least a portion of the energy collection device. The energy concentration device includes a non-periodic, sub-wavelength, dielectric grating.Type: GrantFiled: October 14, 2009Date of Patent: July 1, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Zhen Peng, Marco Fiorentino, David A. Fattal, Nathaniel J. Quitoriano
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Patent number: 8759744Abstract: A method of operating a spectrometer to determine the wavelength of an optical signal, in particular for determining the resonant wavelength of an optical fiber Bragg grating. The spectrometer comprises an array of photosensitive pixels each of which generates an output signal in response to the intensity of light incident on the pixel, and a refractive element arranged to direct light to a particular position in the array depending on the wavelength of the light. The method involves selecting a first group of pixels in the array by reference to an expected wavelength distribution of the optical signal and monitoring the output signals from the first group of pixels. On the basis of the output signals from the first group of pixels a second group of pixels is selected and the wavelength of the optical signal is determined from the output signals of the second group of pixels.Type: GrantFiled: October 14, 2009Date of Patent: June 24, 2014Assignee: Moog Insensys LimitedInventors: Mark Volanthen, Glynn Lloyd
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Publication number: 20140169725Abstract: A waveguide lens includes a substrate, a planar waveguide, a media grating, a modulating electrode, and two ground electrodes. The planar waveguide is formed on the substrate and is coupled to a laser light source which emits a laser beam into the planar waveguide. The media grating is formed on the planar waveguide and arranged along a direction that is substantially parallel with an optical axis of the laser beam. The modulating electrode is positioned on and covers the media grating. The ground electrodes are positioned on two sides of the planar waveguide and opposite to each other. The modulating electrode and the ground electrodes cooperatively change an effective refractive index of the planar waveguide to change an effective focal length of the diffractive waveguide lens, utilizing an electro-optical effect, when an electric field is applied thereto.Type: ApplicationFiled: January 9, 2013Publication date: June 19, 2014Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventor: HSIN-SHUN HUANG
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Publication number: 20140169726Abstract: A waveguide lens includes a substrate, a planar waveguide, a media grating, a modulating electrode, and two ground electrodes. The planar waveguide is formed on the substrate and is coupled with a laser light source which emits a laser beam into the planar waveguide. The media grating is formed on the planar waveguide. The modulating electrode is positioned on and covers the media grating. The ground electrodes are positioned on the planar waveguide and arranged at opposite sides of the media grating. The modulating electrode and the ground electrodes cooperatively change an effective refractive index of the planar waveguide to alter the effective focal length of the diffractive waveguide lens, utilizing an electro-optical effect, when an electric field is applied thereto.Type: ApplicationFiled: January 9, 2013Publication date: June 19, 2014Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventor: HSIN-SHUN HUANG