Grating Patents (Class 385/37)
  • Patent number: 11522341
    Abstract: A tunable laser includes a reflective semiconductor optical amplifier (SOA), a grating codirectional coupler, and a reflective microring resonator. The grating codirectional coupler and the reflective microring resonator are both formed on a silicon base. An anti-reflection film is disposed on a first end surface of the reflective SOA, and the first end surface is an end surface, coupled to a first waveguide of the grating codirectional coupler, of the reflective SOA. A second waveguide of the grating codirectional coupler is coupled to the first waveguide, a first grating is disposed on the first waveguide, a second grating disposed opposite to the first grating is disposed on the second waveguide, and the first grating and the second grating constitute a narrow-band pass filter. The second waveguide is connected to the reflective microring resonator.
    Type: Grant
    Filed: May 19, 2020
    Date of Patent: December 6, 2022
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Jialin Zhao, Wei Chen, Li Zeng
  • Patent number: 11509116
    Abstract: An internal laser component of an optical device comprises: a waveguide that defines a guided mode of a first optical wave characterized by a first propagation constant associated with a first effective refractive index. An optical antenna grating comprises: a waveguide that defines a guided mode of a second optical wave characterized by a second propagation constant associated with a second effective refractive index, and a grating structure configured to emit a portion of the second optical wave in a selected direction. The internal laser component and the optical antenna grating are configured to provide a relationship between the first effective refractive index and the second effective refractive index such that the selected direction is substantially insensitive to a change in a temperature of a thermal environment in which the internal laser component and the optical antenna grating are thermally coupled.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: November 22, 2022
    Assignee: Analog Photonics LLC
    Inventors: Diedrik Vermeulen, Patrick Callahan, Michael Watts, Ehsan Hosseini, Christopher Vincent Poulton
  • Patent number: 11508089
    Abstract: A method of wheel encoder to camera calibration, including receiving a LiDAR (Light Detection and Ranging) signal, receiving a camera signal, receiving a wheel encoder signal, calibrating the camera signal to the LiDAR signal, calibrating the wheel encoder signal to the LiDAR signal and calibrating the camera signal to the wheel encoder signal based on the calibration of the camera signal to the LiDAR signal and the wheel encoder signal to the LiDAR signal.
    Type: Grant
    Filed: March 5, 2021
    Date of Patent: November 22, 2022
    Assignee: Black Sesame Technologies Inc.
    Inventors: Yu Huang, Ruihui Di, Zheng Qi, Jizhang Shan
  • Patent number: 11493691
    Abstract: An optical system is provided including a photonic integrated circuit and an optical lens system. The photonic integrated circuit includes an emission interface surface and a spatial array of apertures. The spatial array of apertures has a high numerical aperture (NA) of greater than 0.2 and includes a plurality of apertures spatially distributed across the interface surface. The optical lens system interfaces the photonic integrated circuit with free space by: receiving emitted light from the spatial array of apertures and altering a trajectory of the emitted light into the free space and receiving returning light from the free space and altering a trajectory of the returning light, such that the returning light is received by the spatial array of apertures.
    Type: Grant
    Filed: May 15, 2020
    Date of Patent: November 8, 2022
    Assignee: INSIGHT LIDAR, INC.
    Inventors: Christopher Wood, Russel E. Sibell
  • Patent number: 11487053
    Abstract: An optical element includes a substrate, an intermediate layer, a topmost layer, and a contiguous multitude of recessed and non-recessed areal regions. The intermediate layer is formed over a top surface of the substrate and has a refractive index nI. The topmost layer is formed directly on the intermediate layer and has a refractive index nT where nT?nI. The intermediate and topmost layers are substantially transparent over an operational wavelength range that includes a design wavelength ?0. A subset of areal regions has a largest transverse dimension less than about ?0. Each non-recessed areal region includes corresponding portions of the intermediate and topmost layers. Each recessed areal region extends entirely through the topmost layer and at least partly through the intermediate layer. A fill medium fills the recessed areal regions. The areal regions are variously sized and distributed transversely across the optical element.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: November 1, 2022
    Assignee: II-VI DELAWARE, INC.
    Inventors: Christoph M. Greiner, Jianji Yang, Dmitri Iazikov
  • Patent number: 11480737
    Abstract: In the wavelength selective fiber optic switch, an optical fiber with a portion of cladding removed defines a window facilitating access to the radially evanescent field present when optical power is propagating through the optical fiber, defining a first transmission path. The cladding removed optical fiber, a secondary optical waveguide, and a grating structure form a grating assisted coupler. An adjustable positioning fixture changes the relative spacing of the fiber core, grating, and output waveguide between a decoupled position and a coupled position. The switch operates, in the decoupled position, to allow optical power to propagate unperturbed through the first transmission path, including optical power at said optical wavelength, and in the coupled position, to extract and reroute optical power at the optical wavelength to propagate through the second transmission path, while leaving unperturbed other wavelengths propagating through the first transmission path.
    Type: Grant
    Filed: August 24, 2021
    Date of Patent: October 25, 2022
    Inventors: Garrett Smith Sylvester, David L. K. Eng, M. Craig Swan
  • Patent number: 11473943
    Abstract: An optical fiber sensor includes an optical fiber. The optical fiber includes a cladding having a cladding refractive index, and a plurality of fiber cores embedded in the cladding and extending along a longitudinal axis of the optical fiber. The plurality of fiber cores include a first subset of at least one first fiber core and a second subset of at least one second fiber core. The at least one first fiber core has a first core refractive index different from the cladding refractive index and a first core radius in a direction transverse to the longitudinal axis. The at least one second fiber core has a second core refractive index different from the cladding refractive index and a second core radius transverse to the longitudinal axis. The second core refractive index and the second core radius differ from the first core refractive index and the first core radius such that a temperature sensitivity of the at least one second fiber core differs from the temperature sensitivity of the first fiber core.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: October 18, 2022
    Assignees: FUJIKURA LTD., KONINKLIJKE PHILIPS N.V.
    Inventors: Jeroen Jan Lambertus Horikx, Gert Wim 'T Hooft, Anna Hendrika Van Dusschoten, Shingo Matsushita, Ichii Kentaro
  • Patent number: 11460694
    Abstract: An optical waveguide device for use in a head up display. The waveguide device provides pupil expansion in two dimensions. The waveguide device comprise a primary waveguide and a secondary waveguide, the secondary waveguide being positioned on a face of the primary waveguide. The secondary waveguide has a diffraction grating on a face opposite to the face which contacts the primary waveguide. The diffraction grating diffracts light into more than one diffraction order. Rays diffracted into a non-zero order are trapped in the secondary waveguide by total internal reflection.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: October 4, 2022
    Assignee: Snap Inc.
    Inventor: Ian Marshall
  • Patent number: 11448828
    Abstract: An optical device for coupling light propagating between a waveguide and an optical transmission component is provided. The optical device includes a taper portion and a grating portion. The taper portion is disposed between the grating portion and the waveguide. The grating portion includes rows of grating patterns. A first size of a first grating pattern in a first row of grating patterns is larger than a second size of a second grating pattern in a second row of grating patterns. A first distance between the first row of grating patterns and the waveguide is less than a second distance between the second row of grating patterns and the waveguide.
    Type: Grant
    Filed: February 22, 2021
    Date of Patent: September 20, 2022
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Chan-Hong Chern, Chih-Chang Lin, Chewn-Pu Jou, Chih-Tsung Shih, Feng-Wei Kuo, Lan-Chou Cho, Min-Hsiang Hsu, Weiwei Song
  • Patent number: 11451297
    Abstract: Systems and methods for reducing the variation in the power of optical signals transmitted in an upstream direction, at the inputs of an active combiner in an RFoG CATV architecture preferably configured to reduce optical beat interference, so as to increase the dynamic range of a laser in the active combiner.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: September 20, 2022
    Assignee: ARRIS Enterprises LLC
    Inventors: Zoran Maricevic, Brent D. Arnold, Zhijian Sun, Benny S. Lewandowski
  • Patent number: 11444702
    Abstract: Systems and methods for identifying a device are described. In an example, a processor can receive a first signal having a first waveform encoding data. The processor can extract the data from the first signal. The processor can determine a transformation being used to encode the data in the first waveform. The processor can generate a second signal using the determined transformation to encode the data in a second waveform. The processor can determine a difference between the first waveform and the second waveform. The processor can identify a device as a candidate device that sent the first signal, based on the determined difference.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: September 13, 2022
    Assignee: International Business Machines Corporation
    Inventors: Bodhisatwa Sadhu, Supriyo Chakraborty
  • Patent number: 11435528
    Abstract: A photonic integrated circuit assembly generates light for use in a display system or a depth sensing system. The photonic integrated circuit assembly includes optical conditioning elements integrated into a photonic integrated circuit. The photonic integrated circuit includes one or more light sources on the photonic integrated circuit. The photonic integrated circuit includes a waveguide and one or more gratings located in a core of the photonic integrated circuit. The gratings may collimate and/or collocate light emitted by the light source. The photonic integrated circuit may include a beam shaping element integrated into the photonic integrated circuit. A MEMS scanner may use the collocated and/or collimated light emitted by the photonic integrated circuit to generate a display for a user or to generate a structured light pattern for use in a depth sensing system.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: September 6, 2022
    Assignee: Meta Platforms Technologies, LLC
    Inventors: Zihe Gao, Zhaoming Zhu, Michael Hall, Guohua Wei
  • Patent number: 11428871
    Abstract: An optical device for coupling light propagating between a waveguide and an optical transmission component is provided. The optical device including a taper portion and a grating portion. The grating portion is connected to the taper portion. The grating portion includes grating patterns. Ends of the grating patterns are separated from an outer edge of the optical device by a distance.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: August 30, 2022
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventor: Chan-Hong Chern
  • Patent number: 11415673
    Abstract: A structure of a silicon photonics device for LIDAR includes a first insulating structure and a second insulating structure disposed above one or more etched silicon structures overlying a substrate member. A metal layer is disposed above the first insulating structure without a prior deposition of a diffusion barrier and adhesion layer. A thin insulating structure is disposed above the second insulating structure. A first configuration of the metal layer, the first insulating structure and the one or more etched silicon structures forms a free-space coupler. A second configuration of the thin insulating structure above the second insulating structure forms an edge coupler.
    Type: Grant
    Filed: November 24, 2021
    Date of Patent: August 16, 2022
    Assignee: AURORA OPERATIONS, INC.
    Inventors: Sen Lin, Andrew Steil Michaels
  • Patent number: 11412207
    Abstract: Techniques for producing an overcoat layer on slanted surface-relief structures and devices obtained using the techniques are disclosed. In some embodiments, a method of planarizing an overcoat layer over a surface-relief structure includes removing a portion of the overcoat layer using an ion beam at a glancing angle. The overcoat layer includes planar surface portions and non-planar surface portions. Each of the non-planar surface portions includes a first sloped side and a second sloped side facing the first sloped side. The glancing angle is selected such that the first sloped side of each non-planar surface portion is shadowed from the ion beam by an adjacent planar surface portion such that the ion beam does not reach at least the first sloped side of each non-planar surface portion but reaches the second sloped side of each non-planar surface portion.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: August 9, 2022
    Assignee: META PLATFORMS TECHNOLOGIES, LLC
    Inventor: Nihar Ranjan Mohanty
  • Patent number: 11404278
    Abstract: An optical grating component may include a substrate, and an optical grating, the optical grating being disposed on the substrate. The optical grating may include a plurality of angled structures, disposed at a non-zero angle of inclination with respect to a perpendicular to a plane of the substrate, wherein the plurality of angled structures are arranged to define a variable depth along a first direction, the first direction being parallel to the plane of the substrate.
    Type: Grant
    Filed: September 22, 2020
    Date of Patent: August 2, 2022
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: John Hautala, Morgan Evans, Rutger Meyer Timmerman Thijssen, Joseph C. Olson
  • Patent number: 11402577
    Abstract: A method, system, and computer program product for using photorefractive material for analog optic storage and other applications of optical neuromorphic systems. The method may include coupling electromagnetic radiation into a first optical input and a second optical input, where the first optical input and the second optical input are part of an integrated optical device, the integrated optical device including: a first optical mode coupler connected to a first pair of optical ports including a first optical input and output; a second optical mode coupler connected to a second pair of optical ports including a second optical input and output, and the first optical mode coupler connected to the second optical mode coupler using a pair of arms (including a photorefractive material). The method may also include obtaining an optical interference pattern in the photorefractive material of each arm of the integrated optical device.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: August 2, 2022
    Assignee: International Business Machines Corporation
    Inventors: Folkert Horst, Roger F. Dangel, Bert Jan Offrein
  • Patent number: 11402578
    Abstract: A manufacturing system performs a deposition of an etch-compatible film over a substrate. The etch-compatible film includes a first surface and a second surface opposite to the first surface. The manufacturing system performs a partial removal of the etch-compatible film to create a surface profile on the first surface with a plurality of depths relative to the substrate. The manufacturing system performs a deposition of a second material over the profile created in the etch-compatible film. The manufacturing system performs a planarization of the second material to obtain a plurality of etch heights of the second material in accordance with the plurality of depths in the profile created in the etch-compatible film. The manufacturing system performs a lithographic patterning of a photoresist deposited over the planarized second material to obtain the plurality of etch heights and one or more duty cycles in the second material.
    Type: Grant
    Filed: July 1, 2020
    Date of Patent: August 2, 2022
    Assignee: Meta Platforms Technologies, LLC
    Inventors: Matthew E. Colburn, Giuseppe Calafiore, Matthieu Charles Raoul Leibovici, Nihar Ranjan Mohanty
  • Patent number: 11391950
    Abstract: A surface-relief structure comprises a surface-relief grating including a first material characterized by a first refractive index, a first layer of a second material having a second refractive index conformally deposited on surfaces of the surface-relief grating, and a second layer of a third material having a third refractive index conformally deposited on the first layer. The effective refractive index of the combination of the first layer and the second layer is less than, equal to, or greater than the first refractive index, thereby increasing the duty cycle and/or modifying the overall refractive index of the surface-relief structure. The first layer and the second layer are deposited using, for example, atomic layer deposition techniques.
    Type: Grant
    Filed: June 23, 2020
    Date of Patent: July 19, 2022
    Assignee: META PLATFORMS TECHNOLOGIES, LLC
    Inventor: Giuseppe Calafiore
  • Patent number: 11385410
    Abstract: A millimeter scale weak grating coupler comprising a silicon waveguide having bars of overlay material of length (a) disposed periodically at a period (?) adjacent the silicon waveguide whereby a uniform grating output is achieved.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: July 12, 2022
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Michal Lipson, Aseema Mohanty, Christopher T. Phare, Moshe Zadka, Samantha P. Roberts, You-Chia Chang
  • Patent number: 11378743
    Abstract: Structures including a grating coupler and methods of fabricating a structure including a grating coupler. The structure includes structure includes a dielectric layer on a substrate, a first waveguide core positioned in a first level over the dielectric layer, and a second waveguide core positioned in a second level over the dielectric layer. The second level differs in elevation above the dielectric layer from the first level. The first waveguide core includes a tapered section. The structure further includes a grating coupler having a plurality of segments positioned in the second level adjacent to the second waveguide core. The segments of the grating coupler and the tapered section of the first waveguide core are positioned in an overlapping arrangement.
    Type: Grant
    Filed: January 12, 2021
    Date of Patent: July 5, 2022
    Assignee: GlobalFoundries U.S. Inc.
    Inventors: Yusheng Bian, Roderick A. Augur, Kenneth J. Giewont, Karen Nummy, Edward Kiewra, Steven M. Shank
  • Patent number: 11356191
    Abstract: Embodiments of the invention describe apparatuses, optical systems, and methods for utilizing a dynamically reconfigurable optical transmitter. A laser array outputs a plurality of laser signals (which may further be modulated based on electrical signals), each of the plurality of laser signals having a wavelength, wherein the wavelength of each of the plurality of laser signals is tunable based on other electrical signals. An optical router receives the plurality of (modulated) laser signals at input ports and outputs the plurality of received (modulated) laser signals to one or more output ports based on the tuned wavelength of each of the plurality of received laser signals. This reconfigurable transmitter enables dynamic bandwidth allocation for multiple destinations via the tuning of the laser wavelengths.
    Type: Grant
    Filed: October 7, 2020
    Date of Patent: June 7, 2022
    Assignee: Juniper Networks, Inc.
    Inventors: Brian Robert Koch, Daniel Sparacin, Alexander W. Fang
  • Patent number: 11336374
    Abstract: Optical communication modules, optical communication cables, and associated methods of manufacturing are provided. An example optical communication module includes a substrate supporting a first optical transceiver and a second optical transceiver. The first optical transceiver includes a first optical transmitter that generates optical signals having a first wavelength and a first optical receiver that receives optical signals having a second wavelength. The second optical transceiver includes a second optical transmitter that generates optical signals having the second wavelength and a second optical receiver that receives optical signals having the first wavelength. One or more lens assemblies coupled with the respective transceivers may be used to direct optical signal generated by and directed to the respective transceivers.
    Type: Grant
    Filed: February 5, 2021
    Date of Patent: May 17, 2022
    Assignee: Mellanox Technologies, Ltd.
    Inventors: Yaakov Gridish, Lion Bassat, Elad Mentovich, Dimitrios Kalavrouziotis, Hanan Shumacher
  • Patent number: 11320720
    Abstract: Systems and embodiments for an integrated photonics mode splitter and converter are provided herein. In certain embodiments, a system includes a substrate having a first index of refraction. Additionally, the system includes a waveguide layer on the substrate, wherein the waveguide has a second index of refraction different from the first index of refraction. Also, the waveguide layer includes one or more mode splitters that receive at least one of a first photon in a first mode and a second photon in a second mode through an input port and provide one of the first photon through a first output port and the second photon through a second output port. The waveguide layer also includes a mode converter coupled to the second output of a mode splitter, wherein the mode converter receives the second photon through a port and outputs the second photon in the first mode through the port.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: May 3, 2022
    Assignee: Honeywell International Inc.
    Inventors: Matthew Wade Puckett, Chad Fertig, Steven Tin
  • Patent number: 11320571
    Abstract: One embodiment provides an apparatus for displaying an image comprising: a first optical substrate comprising at least one waveguide layer configured to propagate light in a first direction, wherein the at least one waveguide layer of the first optical substrate comprises at least one grating lamina configured to extract the light from the first substrate along the first direction; and a second optical substrate comprising at least one waveguide layer configured to propagate the light in a second direction, wherein the at least one waveguide layer of the second optical substrate comprises at least one grating lamina configured to extract light from the second substrate along the second direction; wherein the at least one grating lamina of at least one of the first and second optical substrates comprises an SBG in a passive mode.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 3, 2022
    Assignees: ROCKWELL COLLINS, INC., DIGILENS INC.
    Inventors: Robert D. Brown, Alastair John Grant, Wyatt L. Hendrick, Milan Momcilo Popovich, James H. Stanley, Jonathan David Waldern
  • Patent number: 11320586
    Abstract: In accordance with an embodiment, a bandpass transmission filter having a center wavelength of transmission includes: a waveguide structure comprising a grating structure having changing grating pitch values configured to diffract radiation in the waveguide structure having a first wavelength lower than the center wavelength of transmission, and configured to reflect radiation in the waveguide structure having a second wavelength higher than the center wavelength of transmission; and a radiation absorbing structure configured to absorb radiation guided by the waveguide structure having a third wavelength higher than the second wavelength, wherein the radiation absorbing structure is an integrated part of the waveguide structure or comprises a layer arranged adjacent to the waveguide structure.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: May 3, 2022
    Assignee: INFINEON TECHNOLOGIES AG
    Inventors: Andreas Tortschanoff, Cristina Consani, Thomas Grille, Bernhard Jakoby, Christian Ranacher
  • Patent number: 11310570
    Abstract: Disclosed herein are multi-layer wavelength-division multiplexing (WDM) devices that include a first optical signal router to route first demultiplexed signals from a common layer to a first channel layer and a second optical signal router to route second demultiplexed signals from the common layer to a second channel layer.
    Type: Grant
    Filed: October 6, 2020
    Date of Patent: April 19, 2022
    Assignee: Alliance Fiber Optic Products, Inc.
    Inventors: Dong Gui, Yao Li, Shudong Xiao, Andy Fenglei Zhou
  • Patent number: 11307345
    Abstract: Embodiments of the present disclosure are directed to techniques for manufacturing an eyepiece (or eyepiece layer) by applying multiple, different diffraction gratings to a single side of an eyepiece substrate instead of applying different gratings to different sides (e.g., opposite surfaces) of the substrate. Embodiments are also directed to the eyepiece (or eyepiece layer) that is arranged to have multiple, different diffraction gratings on a single side of the eyepiece substrate. In some embodiments, two or more grating patterns are superimposed to create a combination pattern in a template (e.g., a master), which is then used to apply the combination pattern to a single side of the eyepiece substrate. In some embodiments, multiple layers of patterned material (e.g., with differing refraction indices) are applied to a single side of the substrate. In some examples, the combined grating patterns are orthogonal pupil expander and exit pupil expander grating patterns.
    Type: Grant
    Filed: March 8, 2021
    Date of Patent: April 19, 2022
    Assignee: Magic Leap, Inc.
    Inventors: Shuqiang Yang, Vikramjit Singh, Kang Luo, Nai-Wen Pi, Frank Y. Xu
  • Patent number: 11300449
    Abstract: An image capturing device (202) can include a sensor array (210), a lens (230) positioned at a first distance from an intermediate image (235), and apolychromat (220) positioned at a second distance from the lens (230). The polychromat (220) can diffract the intermediate image (235) according to a transform function (207) to produce a dispersed sensor image (215) onto the sensor array (210). The dispersed sensor image (215) can represent a spatial code of the intermediate image (235).
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: April 12, 2022
    Assignee: University of Utah Research Foundation
    Inventors: Rajesh Menon, Peng Wang
  • Patent number: 11290188
    Abstract: An optical communications system includes a laser transmitter to generate an optical signal and a first optical fiber network coupled to transmit the optical signal from the laser transmitter system. A first latchable, asymmetric coupler is disposed along the first optical fiber network to receive the optical signal, and has a first tap output that receives a selected and alterable first fraction of the optical signal. A second latchable, asymmetric coupler is disposed along the first optical fiber network to receive the optical signal from the first latchable asymmetric coupler and has a second tap output that receives a selected and alterable second fraction of the optical signal incident at the second latchable. In certain embodiments the first and second couplers are capable of operating at any of at least three tapping fractions.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: March 29, 2022
    Assignee: COMMSCOPE TECHNOLOGIES LLC
    Inventors: Jan Watté, Salvatore Tuccio, Vivek Panapakkam Venkatesan, Saurav Kumar
  • Patent number: 11262857
    Abstract: A rendering device that renders a three-dimensional object displayed in a virtual reality space on a display includes a processor and a memory storing instructions that, when executed by the processor, cause the processor to render the 3D object as a 3D object of 3D displaying in a virtual reality space coordinate system, render the 3D object as a 3D object of 2D displaying in a plane coordinate system, and update displaying of the display based on a result of the 3D object being rendered as the 3D object of 3D displaying in the virtual reality space coordinate system and a result of the object being rendered as the 3D object of 2D displaying in the plane coordinate system. The rendering device enables intuitive drawing with high accuracy in the virtual reality space.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: March 1, 2022
    Assignee: Wacom Co., Ltd.
    Inventors: Hiroshi Munakata, Hiroshi Tamano, Yuanhao Chen
  • Patent number: 11231489
    Abstract: A signal processing system includes a time domain processing module to receive samples of a range-dependent time domain baseband signal in a frequency modulated continuous wave (FMCW) LIDAR system, and to generate and select time domain subband signals based on time domain subband selection criteria, a time domain to frequency domain converter coupled with the time domain processing module, to generate range-dependent frequency outputs from the selected time domain subbands, and a frequency domain processing module coupled with the time domain to frequency domain converter, to generate and select frequency domain subbands based on frequency domain subband collection criteria, and to detect energy peaks corresponding to target ranges in the field of view of the LIDAR system.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: January 25, 2022
    Assignee: Aeva, Inc.
    Inventors: Kumar Bhargav Viswanatha, Rajendra Tushar Moorti, Jose Krause Perin, Mina Rezk
  • Patent number: 11231579
    Abstract: A waveguide assembly is provided. The waveguide assembly includes a pair of pupil-replicating waveguides. The first pupil-replicating waveguide is configured for receiving an input beam of image light and providing an intermediate beam comprising multiple offset portions of the input beam. The second pupil-replicating waveguide is configured for receiving the intermediate beam from the first pupil-replicating waveguide and providing an output beam comprising multiple offset portions of the intermediate beam. The input beam may be expanded by the waveguide assembly in such a manner that pupil gaps are reduced or eliminated.
    Type: Grant
    Filed: January 18, 2019
    Date of Patent: January 25, 2022
    Assignee: FACEBOOK TECHNOLOGIES, LLC
    Inventors: Giuseppe Calafiore, Ningfeng Huang, Andrew Maimone, Andrew Ouderkirk, Hee Yoon Lee, Maxwell Parsons, Scott Charles McEldowney, Babak Amirsolaimani, Pasi Saarikko, Wanli Chi, Alexander Koshelev, Barry David Silverstein, Lu Lu, Wai Sze Tiffany Lam, Gang Li, Stephan Lutgen, Francois Gerard Franck Olivier, David Massoubre
  • Patent number: 11221264
    Abstract: The invention relates to an optical fiber sensing device (1) for sensing the distribution of the compression/deformation of a compressible/deformable element (2), comprising: an incompressible/undeformable tubular element (3) with a recess (4) extending in a length direction (X) thereof, the recess being enclosed by the tubular element, an optical fiber (5) arranged in the recess, comprising one or more light distortion structures (6), and being expandable in the length direction of the recess, one or more expandable elements (8), having a higher compressibility/deformability than the tubular element in a transverse direction (Y), arranged at one or both ends (9) of the tubular element, the optical fiber being enclosed in the expandable elements, which are arranged for expanding/contracting in the length direction, along with the optical fiber, when the expandable elements are subjected to a transverse load (F).
    Type: Grant
    Filed: July 4, 2018
    Date of Patent: January 11, 2022
    Assignee: Compass Instruments (CI) B.V.
    Inventor: Marinus Jacobus Van Der Hoek
  • Patent number: 11215759
    Abstract: An integrated optoelectronic or optical device is formed by a polarization-splitting grating coupler including two optical waveguides, a common optical coupler and flared optical transitions between the optical coupler and the optical waveguides. The optical coupler is configured for supporting input/output of optical waves. A first region of the optical coupler lies at a distance from the flared optical transitions. The first region includes a first recessed pattern. Second regions of the optical coupler lie between the first region and the flared optical transitions, respectively, in an adjoining relationship. The second regions include a second recessed pattern different from the first recessed pattern.
    Type: Grant
    Filed: June 1, 2020
    Date of Patent: January 4, 2022
    Assignee: STMicroelectronics SA
    Inventors: Frederic Gianesello, Ophelie Foissey, Cedric Durand
  • Patent number: 11215770
    Abstract: The present disclosure provides for two-dimensional mode matching by receiving an optical signal traveling in a first direction; and scattering the optical signal according to a scattering strength that progressively changes in the first direction. In various embodiments, the scattering strength progressively changes by increasing or decreasing in the first direction. A plurality of scatterers disposed in a path of the optical signal change in widths that progressively increase or decrease along the first direction. In various embodiments, a second optical signal is received in the grating coupler from a second direction; and is scattered into a surface of a photonic chip via a grating coupler. In some embodiments, the second direction is perpendicular to the first direction.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: January 4, 2022
    Assignee: Luxtera LLC
    Inventors: Roman Bruck, Attila Mekis
  • Patent number: 11209243
    Abstract: Certain aspects of a novel weapon sight system combine a direct view, a visible light video view, and an infrared (IR) video view mode. Each of the view modes may be viewed individually or simultaneously with one or more of the other view modes through a single viewing aperture. Further, the one or more view-modes may be provided while providing a bore-sighted reticle superimposed on the selected view. Further, the reticle may be powered separately from the video view electronics enabling use of the reticle regardless of the power status video view electronics.
    Type: Grant
    Filed: April 28, 2021
    Date of Patent: December 28, 2021
    Assignee: Maztech Industries, LLC
    Inventors: David Michael Masarik, Michael Raymond Masarik, Matthew James Masarik, David Alexander Steinweg, Gregory Philip Petersen
  • Patent number: 11204277
    Abstract: The present disclosure relates to a spectrometer arrangement for analyzing optical radiation from a light source comprising an echelle grating for dispersion of the radiation entering the spectrometer arrangement in a main dispersion direction, a dispersion element for dispersing the radiation in a cross-dispersion direction, the main dispersion direction and the cross-dispersion direction having a predeterminable angle to each other, and a detector unit for acquiring a first spectrum of a first part of the radiation comprising a first predeterminable wavelength range. According to the present disclosure, the spectrometer arrangement comprises a first optical element, which is arranged or configured in such a way that a second spectrum of a second part of the radiation comprising a second predeterminable wavelength range differing from the first can be acquired by means of the detector unit.
    Type: Grant
    Filed: May 21, 2020
    Date of Patent: December 21, 2021
    Assignee: Analytik Jena GmbH
    Inventors: Stefan Münch, Michael Okruss, Marco Braun
  • Patent number: 11204540
    Abstract: A projection display device comprising a light source and an SBG device having a multiplicity of separate SBG elements sandwiched between transparent substrates to which transparent electrodes have been applied. The substrates function as a light guide. A least one transparent electrode comprises a plurality of independently switchable transparent electrode 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: Grant
    Filed: September 5, 2019
    Date of Patent: December 21, 2021
    Assignee: DigiLens Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern
  • Patent number: 11204463
    Abstract: Embodiments of the disclosure provide an integrated circuit (IC) structure, including an optical medium for light signals; and an optical grating coupler coupled to the optical medium. The optical grating coupler is configured to reorient light from the optical medium. A cladding material is over the optical grating coupler. An absorber layer is over the cladding material, and vertically above the optical grating coupler.
    Type: Grant
    Filed: July 17, 2020
    Date of Patent: December 21, 2021
    Assignee: GlobalFoundries U.S. Inc.
    Inventors: Benjamin V. Fasano, Andreas D. Stricker, Hanyi Ding, Yusheng Bian, Bo Peng
  • Patent number: 11194099
    Abstract: Embodiments of the present disclosure provide a silicon-based optical antenna with a reflective layer and a preparation method therefor. The silicon-based optical antenna comprises: an SOI substrate, the SOI substrate at least comprises a bottom silicon layer, a buried oxide layer, and a top silicon layer, the buried oxide layer is located between the bottom silicon layer and the top silicon layer, the top silicon layer is etched to form a row of waveguides, spacings between the waveguides in the row of the waveguides are in an uneven distribution, each waveguide of the row of the waveguides is etched with gratings, the bottom silicon layer is formed with a groove directly reaching a surface of the buried oxide layer facing the bottom silicon layer, and the surface of the buried oxide layer in the groove is formed with a metal reflective layer.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: December 7, 2021
    Assignee: VANJEE TECHNOLOGY CO., LTD.
    Inventors: Pengfei Wang, Yang Xu, Zhaosong Li, Zhibo Li, Yejin Zhang, Hongyan Yu, Jiaoqing Pan, Qingfei Wang, Linyan Tian
  • Patent number: 11169314
    Abstract: A waveguide apparatus has in combination: a light pipe with an optical axis for guiding light therethrough; a light coupling element in optical contact with an elongate portion of the reflecting surface of the light guide; and an optical waveguide in optical contact with the coupling element.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: November 9, 2021
    Assignee: DigiLens Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern, Alastair John Grant
  • Patent number: 11169426
    Abstract: A Liquid Crystal Waveguide (LCW) system can provide sub-aperture incoupling or outcoupling of light having an input wavelength and input beamsize defining an aperture characteristic of the system. A Liquid Crystal Waveguide (LCW) can include a generally planar LCW core to receive light via a light input zone for communication toward a light output zone. Sub-aperture interfacial light couplers can be planarly arranged in or parallel to the planar LCW core in the light input zone or the light output zone. Sub-aperture interfacial light couplers can include teeth, prisms, or facets, a photonic crystal metasurface, or a geometric-phased holograph (GPH)). Overall LCW thickness can be reduced, which can be helpful in space-limited applications or for reducing material costs.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: November 9, 2021
    Assignee: Analog Devices, Inc.
    Inventors: Michael Ziemkiewicz, Michael Howard Anderson, Tyler Adam Dunn, David Edward Fish, Scott Dennis Rommel, Andrew William Sparks, Scott Robert Davis
  • Patent number: 11158950
    Abstract: A plurality of tapered core waveguides which may be configured as a spectral component splitter, a spectral component combiner, and various combinations thereof, form a compact antenna array which may receive and/or transmit energy, act to form and steer a transmitted beam, act to discern received signals, and offer capability of multi frequency operation as well as controlled polarization.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: October 26, 2021
    Assignee: Shalom Wertsberger
    Inventor: Shalom Wertsberger
  • Patent number: 11137548
    Abstract: A grating coupler reflector (retro reflector) is formed within a photonics chip and includes a vertical scattering region, an optical waveguide, and a reflector. The optical waveguide is optically coupled to the vertical scattering region. The reflector is positioned at an end of the optical waveguide. The reflector is configured to reflect light that propagates through the optical waveguide from the vertical scattering region back toward the vertical scattering region. The location of the grating coupler reflector on the photonics chip is determinable by scanning a light emitting active optical fiber over the chip and detecting when light is reflected back into the active optical fiber from the grating coupler reflector. The determined location of the grating coupler reflector on the photonics chip is usable as a reference location for aligning optical fiber(s) to corresponding optical grating couplers on the photonics chip.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: October 5, 2021
    Assignee: Ayar Labs, Inc.
    Inventors: John Fini, Roy Edward Meade, Derek Van Orden, Forrest Sedgwick
  • Patent number: 11125940
    Abstract: A method of fabricating a waveguide device is disclosed. The method includes providing a substrate having an elector-interconnection region and a waveguide region and forming a patterned dielectric layer and a patterned redistribution layer (RDL) over the substrate in the electro-interconnection region. The method also includes bonding the patterned RDL to a vertical-cavity surface-emitting laser (VCSEL) through a bonding stack. A reflecting-mirror trench is formed in the substrate in the waveguide region, and a reflecting layer is formed over a reflecting-mirror region inside the waveguide region. The method further includes forming and patterning a bottom cladding layer in a wave-tunnel region inside the waveguide region and forming and patterning a core layer and a top cladding layer in the waveguide region.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: September 21, 2021
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Chun-Hao Tseng, Wan-Yu Lee, Hai-Ching Chen, Tien-I Bao
  • Patent number: 11119280
    Abstract: Disclosed are grating couplers having a high coupling efficiency for optical communications. In one embodiment, an apparatus for optical coupling is disclosed. The apparatus includes: a substrate; a grating coupler comprising a plurality of coupling gratings over the substrate, wherein each of the plurality of coupling gratings extends in a first lateral direction and has a cross-section having a middle-raised shape in a second lateral direction, wherein the first and second lateral directions are parallel to a surface of the substrate and perpendicular to each other in a grating plane; and a cladding layer comprising an optical medium, wherein the cladding layer is filled in over the grating coupler.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: September 14, 2021
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Feng-Wei Kuo, Lan-Chou Cho, Huan-Neng Chen, Chewn-Pu Jou, Wen-Shiang Liao
  • Patent number: 11106033
    Abstract: A head-mounted display system is configured to project light to an eye of a user wearing the head-mounted display system to display content in a vision field of said user. The head-mounted display system comprises at least one diffusive optical element, at least one out-coupling optical element, at least one mask comprising at least one mask opening, at least one illumination in-coupling optical element configured to in-couple light from at least one illumination source into a light-guiding component, an image projector configured to in-couple an image and an at least one illumination source is configured to in-couple light into at least one illumination in-coupling optical element, an eyepiece, a curved light-guiding component, a light-guiding component comprising a portion of a frame, and/or two light-guiding components disposed on opposite sides of at least one out-coupling optical element.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: August 31, 2021
    Assignee: Magic Leap, Inc.
    Inventors: Lionel Ernest Edwin, Ivan Li Chuen Yeoh, Zhiheng Jia, Adam C. Carlson
  • Patent number: 11092806
    Abstract: An image display apparatus includes a first waveguide, a second waveguide positioned at one side of the first waveguide, a first diffraction grating positioned at an other side of the first waveguide, a second diffraction grating positioned between the first waveguide and the second waveguide and a display engine configured to control a shape of the second diffraction grating according to a quantity of light diffracted from the first diffraction grating, wherein at least a portion of light incident on the first waveguide is diffracted from the first diffraction grating, and at least a portion of light incident on the second waveguide, is diffracted from the second diffraction grating.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: August 17, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Wonjun Lee, Kyusub Kwak, Kyookeun Lee, Myongjo Choi
  • Patent number: 11092741
    Abstract: A temperature compensation module mounted in an arrayed waveguide grating (AWG) comprises a base attached to the AWG and a moving member attached to the base, wherein the base comprises: a first fixing part attached to a first sub chip of the AWG; a second fixing part attached to a second sub chip of the AWG; a hole which is a gap between the first fixing part and the second fixing part, and is disposed to include, within the gap, a cut surface for dividing the AWG into the first sub chip and the second sub chip; and a ‘’-shaped elastic part, wherein the moving member is attached to the first fixing part so as to horizontally move the first sub chip of the AWG in the direction of decreasing central wavelength changes caused by temperature changes.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: August 17, 2021
    Assignee: Polslab Inc.
    Inventor: Jin Bong Kim