Tuning Patents (Class 372/20)
  • Patent number: 11313667
    Abstract: The present description relates to a stabilized interferometric system comprising: a light source (210) for emitting an initial beam of coherent light; a spatial light modulator (220) configured to receive at least a first part of said initial beam and input data (203) and configured to emit a spatially modulated beam resulting from a spatial modulation of a parameter of said first part of said initial beam based on said input data; a scattering medium (230) configured to receive said spatially modulated beam; a detection unit (240) configured to acquire an interference pattern (IN0) resulting from the interferences between randomly scattered optical paths taken by the spatially modulated beam through the scattering material; a control unit (250) configured to vary the frequency of the laser source in order to at least partially compensate a change in said interference pattern resulting from a change in at least one environmental parameter.
    Type: Grant
    Filed: August 7, 2020
    Date of Patent: April 26, 2022
    Assignee: LightOn SAS
    Inventors: Kilian Müller, Laurent Daudet, Igor Carron, Gustave Pariente
  • Patent number: 11309985
    Abstract: A light source device includes: a plurality of light sources that generate rays of light with different wavelengths corresponding to a plurality of target wavelengths located on a designated wavelength grid; a plurality of photodetectors that detect output powers of the plurality of light sources; a plurality of optical bandpass filters that are provided between the plurality of light sources and the plurality of photodetectors; a temperature adjustment unit that adjusts a temperature of an area around the plurality of light sources; and a processor that controls the temperature adjustment unit based on output signals of the plurality of photodetectors. Widths of passbands of the optical bandpass filters are less than a wavelength spacing in the wavelength grid.
    Type: Grant
    Filed: December 29, 2020
    Date of Patent: April 19, 2022
    Assignee: FUJITSU OPTICAL COMPONENTS LIMITED
    Inventor: Koji Otsubo
  • Patent number: 11287516
    Abstract: A spatial light modulator and a beam steering apparatus including the same are provided. The spatial light modulator may include a distributed Bragg reflector provided on a substrate, a cavity provided on the distributed Bragg reflector, a grating reflector provided on the cavity, and a heater provided on the grating reflector.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: March 29, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sunil Kim, Junghyun Park, Duhyun Lee, Byunggil Jeong
  • Patent number: 11289877
    Abstract: An optical system can lock a wavelength of a tunable laser to a specified wavelength of a temperature-insensitive spectral profile of a spectral filter. In some examples, the spectral filter, such as a Fabry-Perot filter, can have a temperature-insensitive peak wavelength and increasing attenuation at wavelengths away from the peak wavelength. The spectral filter can spectrally filter the laser light to form filtered laser light. A detector can detect at least a fraction of the filtered laser light. Circuitry coupled to the detector and the laser can tune the tunable laser to set a signal from the detector to a specified value corresponding to a specified wavelength in the spectral profile, and thereby adjust the selectable wavelength of the tunable laser to match the specified wavelength. In some examples, the optical system can include a polarization rotator, and can use polarization to separate incident light from return light.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: March 29, 2022
    Assignee: Aurrion, Inc.
    Inventors: Brian R. Koch, Jonathan Edgar Roth
  • Patent number: 11287642
    Abstract: A device according to one example of principles described herein may include a backplane, electrochemical actuator, and an optical resonator, wherein the electrochemical actuator is located between the backplane and optical resonator. Applied energy may be used to modify the volume of the electrochemical actuator material modifying the resonant/interferometric absorption, transmission, and reflection at visible and/or infrared frequencies.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: March 29, 2022
    Assignee: Vanderbilt University
    Inventors: Jason G. Valentine, Cary L. Pint, Zachary J. Coppens, Adam P. Cohn
  • Patent number: 11287743
    Abstract: A control system for controlling a laser, comprising a sensor for sensing a physical value indicative of a characteristic of a laser beam emitted by the laser, a switch, a first controller and a second controller. Each controller is configured, to receive a further sensor value from the sensor, adjust a received setpoint value based on the received further sensor value to give an output value and cause the laser to operate in accordance with the output value. The switch is configured to switch between the controllers such that output values are provided from each controller in a cyclic fashion.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: March 29, 2022
    Assignee: ASML Netherlands B.V.
    Inventors: Herman Philip Godfried, Frank Everts, Wilhelmus Patrick Elisabeth Maria Op 'T Root
  • Patent number: 11270091
    Abstract: An imaging system for capturing an object includes a plurality of light sources for illuminating the object and a plurality of optical sensors. The plurality of light sources emit light radiation and the plurality of optical sensors are arranged to detect light radiation reflected from the object.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: March 8, 2022
    Assignee: VITRONIC Dr.-Ing. Stein Bildverarbeitungssysteme GmbH
    Inventors: Jörg Ramsauer, Robert Smolorz, Burghard Hoffmann
  • Patent number: 11244932
    Abstract: A display apparatus includes a substrate in which a plurality of pads are disposed, a plurality of micro LEDs, wherein each micro LED from among the plurality of micro LEDs is electrically connected to a respective group of pads from among the plurality of pads and mounted on the substrate, and a plurality of protrusion members, wherein each protrusion member from among the plurality of protrusion members protrudes from the substrate and is formed adjacent to a respective pad from among the plurality of pads.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: February 8, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Doyoung Kwag, Eunhye Kim, Sangmoo Park, Minsub Oh, Yoonsuk Lee
  • Patent number: 11231533
    Abstract: A method for fabricating an optical element is provided. The fabrication method includes the following steps. A substrate is provided. A plurality of first dielectric layers, a plurality of metal layers of Ag or its alloy and a plurality of second dielectric layers are formed over the substrate. The plurality of first dielectric layers and the plurality of metal layers are alternately formed over the substrate. The plurality of second dielectric layers are formed on one side away from the substrate of the plurality of metal layers and located between the plurality of metal layers and the plurality of first dielectric layers. An optical element fabricated by the method is also provided.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: January 25, 2022
    Assignee: VISERA TECHNOLOGIES COMPANY LIMITED
    Inventors: Chang-Wei Chen, Chih-Yu Chen, Chen-Yi Wu
  • Patent number: 11223183
    Abstract: The present disclosure is directed to an optical device including at least one temperature-dependent tunable element for controlling a wavelength of an optical signal, a first temperature control circuit for controlling a temperature of a first region of the optical device; and a second temperature control circuit for controlling a temperature of a second region of the optical device. The second region may include a portion of the first region. The second region may be smaller than the first region. The tunable element may be positioned in the second region such that a temperature of the tunable element is controlled based on the second temperature control circuit controlling the temperature of the second region. The tunable element may be one of (i) a laser for transmitting an outgoing optical signal and (ii) an optical filter coupled to a photodetector for receiving an incoming optical signal.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: January 11, 2022
    Assignee: Go!Foton Holdings, Inc.
    Inventors: Feng Tian, Chi Kong Paul Ng
  • Patent number: 11211771
    Abstract: A mode-locked solid state laser apparatus including an optical film, a gain medium crystal, a Fabry-Perot element, a first mirror, a second mirror, a third mirror and an output coupler is disclosed. The optical film is configured to receive a pumping light having a first wavelength incident in a first direction. The gain medium crystal receives the pumping light passing the optical film, and generates an initial laser beam having a second wavelength, wherein the initial laser beam forms a first optical path starting at one end thereof from the gain medium crystal. The Fabry-Perot element is disposed on the other end of the first optical path opposite to the one end, and reflects the initial laser beam along a second optical path having one end thereof starting from the Fabry-Perot element.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: December 28, 2021
    Assignee: HONG YANG LASER SERVICE CO., LTD.
    Inventors: Yung-Fu Chen, Hsing-Chih Liang, Tzu-Lin Huang, Shu-Ching Li, Chia-Han Tsou
  • Patent number: 11204414
    Abstract: A laser radar device includes: a wavelength-tunable light source; an optical branch coupler dividing light emitted by the wavelength-tunable light source into local and transmission light; an optical phase modulator applying, to the transmission or local light, frequency shifts for wavelength discrimination of different shift amounts corresponding to respective wavelengths of light emitted by the wavelength-tunable light source; a wavelength separator switching between light paths for output, in response to wavelength of transmission light; an optical antenna emitting into space transmission light output by the wavelength separator, and receiving, as received light, backward-scattered light generated from transmission light in space in which lines of sight corresponding to respective wavelengths of the transmission light are determined; an optical heterodyne receiver receiving local light and received light, and performing heterodyne detection; and a signal processor performing frequency analysis of the optic
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: December 21, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Eisuke Haraguchi, Toshiyuki Ando
  • Patent number: 11202062
    Abstract: A system and method for colorimetric calibration is described herein. A system for performing color calibration is described, comprising at least one broad spectrum light emitting diode, at least one light diffuser plate, at least one interference filter, and a camera, the camera comprising at least one sensor for detection of colors, wherein a spectral response within 5% error of a ground truth method can be achieved. A method for performing color calibration is described, comprising transmitting light from at least one broad spectrum light emitting diode, scattering light with at least one light diffuser plate, filtering light with at least one interference filter, detecting light at a camera sensor, mapping an intensity value for each pixel of the camera sensor, and creating a quantum efficiency curve for each of red, green, and blue channels.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: December 14, 2021
    Assignee: UNIVERSITY OF NEW HAMPSHIRE
    Inventor: Yuri Rzhanov
  • Patent number: 11183808
    Abstract: Fine-structure in the transverse mode of an excimer laser beam is minimized by having a plurality of resonator mirrors located at each end of a linear excimer laser. At one end, a highly-reflective end mirror and a partially-reflective end mirror are inclined at small angle with respect to each other. At the other end, two output-coupling mirrors are inclined at a small angle with respect to each other. This arrangement of resonator mirrors generates a composite laser beam that blurs any fine structure.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: November 23, 2021
    Assignee: Coherent LaserSystems GMBH & Co. KG
    Inventors: Igor Bragin, Timur Misyuryaev, Paul Van Der Wilt
  • Patent number: 11177886
    Abstract: A pluggable bidirectional optical amplifier module may include preamp and booster optical amplifiers and a housing. The preamp optical amplifier may be configured to amplify optical signals traveling in a first direction. The booster optical amplifier may be configured to amplify optical signals traveling in a second direction. The housing may at least partially enclose the preamp optical amplifier and the booster optical amplifier. The pluggable bidirectional optical amplifier module may have a mechanical form factor that is compliant with a pluggable communication module form factor MSA. A colorless mux/demux cable assembly may be operated with the pluggable bidirectional optical amplifier. The colorless mux/demux cable assembly may include a 1:N optical splitter a N:1 optical combiner coupled side-by-side to the 1:N optical splitter, a first fiber optic cable optic cable, and a second fiber optic cable.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: November 16, 2021
    Assignee: II-VI DELAWARE, INC.
    Inventors: Martin Williams, Yajun Wang, Eric Green, Aravanan Gurusami, Deepak Devicharan, Timothy Zahnley, Mike Burgess
  • Patent number: 11177624
    Abstract: Examples of the present disclosure include a tunable laser comprising a waveguide including gain section. The waveguide overlies and is optically coupled to another waveguide. The another waveguide has a reflector at one end. A laser cavity is formed in the waveguides.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: November 16, 2021
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Stanley Cheung, Michael Renne Ty Tan, Wayne Sorin, Joaquin Matres Abril, Sagi Mathai
  • Patent number: 11128103
    Abstract: A modulated light source includes an FP laser that emits light in a plurality of Fabry-Perot (FP) modes, a band-pass filter whose center wavelength can be modulated, a light reflector that selectively feeds only light having passed through the modulation filter back to the FP laser, and a wavelength adjustment mechanism that adjusts the center wavelength so as to coincide with one of the predetermined FP mode when the light fed back to the FP laser is used as seed light for stimulated emission of radiation to cause selective light emission at an oscillation wavelength.
    Type: Grant
    Filed: January 11, 2016
    Date of Patent: September 21, 2021
    Assignees: FUJITSU LIMITED, PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION
    Inventor: Tomoyuki Akiyama
  • Patent number: 11128098
    Abstract: A method and apparatus for characterizing an optical element. The optical element is part of a laser and is mounted on a translation stage to scan the optical element transverse to an intracavity laser beam. A performance characteristic of the laser is recorded as a function of position of the optical element.
    Type: Grant
    Filed: April 15, 2019
    Date of Patent: September 21, 2021
    Assignee: Quantum-Si Incorporated
    Inventors: Jonathan C. Schultz, Andrey V. Okishev, Craig Wenger, Brittany Lathrop, Faisal R. Ahmad
  • Patent number: 11127774
    Abstract: An image sensor is disclosed. The image sensor includes: a common node heavily doped with dopants of a first conductivity type, the common node being within the substrate and abutting the front surface of the substrate; and a sensing node heavily doped with dopants of a second conductivity type opposite to the first conductivity type, the sensing node being within the substrate and abutting the front surface of the substrate; an interconnect structure, wherein the front surface of the substrate faces the interconnect structure; a distributed Bragg reflector (DBR) between the front surface of the substrate and the interconnect structure; a first contact plug passing through the DBR and coupling the common node to the interconnect structure; and a second contact plug passing through the DBR and coupling the sensing node to the interconnect structure.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: September 21, 2021
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
    Inventor: Yuichiro Yamashita
  • Patent number: 11125618
    Abstract: A photonic integrated circuit (PIC) spectrometer for sensing the spectroscopic signature of airborne molecules, comprising a dispersive element to separate the spectral information spatially, and a tuning mechanism for said dispersive element to convert the spectral information to time-dependent information. The approach allows the PIC spectrometer to have a single (or a few) output pin(s), enabling sensing of the environment with a simple packaged chip that is compact, lightweight, energy efficient and low cost, making it suitable for platforms that have a small form factor, a small power budget, and are cost sensitive, such as mobile devices.
    Type: Grant
    Filed: June 26, 2020
    Date of Patent: September 21, 2021
    Assignee: SCIDATEK INC.
    Inventors: Tomoyuki Izuhara, Louay Eldada
  • Patent number: 11119219
    Abstract: In one embodiment, a lidar system includes a light source configured to emit an optical signal and a receiver that includes one or more detectors configured to detect a portion of the emitted optical signal scattered by a target located a distance from the lidar system. The lidar system also includes a photonic integrated circuit (PIC) that includes an input optical element configured to receive the portion of the scattered optical signal and couple the portion of the scattered optical signal into an input optical waveguide. The input optical waveguide is one of one or more optical waveguides of the PIC configured to convey the portion of the scattered optical signal to the one or more detectors of the receiver. The lidar system further includes a processor configured to determine the distance from the lidar system to the target.
    Type: Grant
    Filed: February 24, 2021
    Date of Patent: September 14, 2021
    Assignee: Luminar, LLC
    Inventors: Joseph G. LaChapelle, Jason M. Eichenholz, Alex Michael Sincore, Lawrence Shah
  • Patent number: 11119213
    Abstract: An electro-optical system has a laser drive electronic circuit, a laser light source and an optical interferometer, forming a closed loop. The laser drive electronic circuit is arranged to receive a reference frequency as input, and a beat frequency as feedback. The laser drive electronic circuit generates a drive output based on a phase difference between the reference frequency and the beat frequency. The optical interferometer, coupled to the laser light, generates optical energy at the beat frequency.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: September 14, 2021
    Assignee: Aeva, Inc.
    Inventors: Bryce Bradford, Mina Rezk
  • Patent number: 11075503
    Abstract: A multi-section laser device is configured with a gain section and an integrated photodetector section. The photodetector section, rather than being a separate component, is integrated directly into the body of the laser. The integrated photodetector section absorbs photons generated by the gain section and creates a photocurrent that is proportional to the output of the multi-section laser device. The measured photocurrent is usable to calculate power output of the multi-section laser device and to identify any adjustments that may be needed to be made to the laser in order to achieve desired laser light output.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: July 27, 2021
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Raymond Kirk Price, Yarn Chee Poon, Gambhir Ranjit
  • Patent number: 11073661
    Abstract: Aspects described herein include an optical waveguide emitter that includes a first optical waveguide and a second optical waveguide that are evanescently coupled and collectively configured to selectively propagate only a first mode of a plurality of optical modes. Each of the first optical waveguide and the second optical waveguide extend through an input waveguide section, a turning waveguide section, and an output waveguide section. One or more of the input waveguide section, the turning waveguide section, and the output waveguide section includes an optically active region. The optical waveguide emitter further includes a refractive index-increasing feature in the turning waveguide section.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: July 27, 2021
    Assignee: Cisco Technology, Inc.
    Inventors: Dominic F. Siriani, Vipulkumar K. Patel, Matthew J. Traverso, Mark A. Webster
  • Patent number: 11063179
    Abstract: Disclosed herein are multi-layered optically active regions for semiconductor light-emitting devices (LEDs) that incorporate intermediate carrier blocking layers, the intermediate carrier blocking layers having design parameters for compositions and doping levels selected to provide efficient control over the carrier injection distribution across the active regions to achieve desired device injection characteristics. Examples of embodiments discussed herein include, among others: a multiple-quantum-well variable-color LED operating in visible optical range with full coverage of RGB gamut, a multiple-quantum-well variable-color LED operating in visible optical range with an extended color gamut beyond standard RGB gamut, a multiple-quantum-well light-white emitting LED with variable color temperature, and a multiple-quantum-well LED with uniformly populated active layers.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: July 13, 2021
    Assignee: Ostendo Technologies, Inc.
    Inventors: Hussein S. El-Ghoroury, Mikhail V. Kisin, Yea-Chuan Milton Yeh, Chih-Li Chuang, Jyh-Chia Chen
  • Patent number: 11041757
    Abstract: A tunable Fabry-Perot (FP) filter element includes a first FP filter stack arranged at a movable first carrier element, and a second FP filter stack arranged in an opposing configuration to the first FP filter stack at a second carrier element, wherein, upon an actuation, the first carrier element with the first FP filter stack is vertically movable with respect to the second carrier element with the second FP filter stack, for adjusting the distance between the first and second opposing FP filter stack and wherein the movable first carrier element is formed as an SON structure (SON=silicon-on-nothing) in an SON substrate, wherein the SON structure is movable suspended by means of a mechanical spring element to the SON substrate.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: June 22, 2021
    Assignee: INFINEON TECHNOLOGIES DRESDEN GMBH & CO. KG
    Inventor: Thoralf Kautzsch
  • Patent number: 11018475
    Abstract: Provided is a quarter-wavelength shifted distributed feedback laser diode. The laser diode includes a substrate having a laser diode section and a phase adjustment section, a waveguide layer on the substrate, a clad layer on the waveguide layer, a grating disposed in the clad layer in the laser diode section, an anti-reflection coating disposed on one side walls, of the substrate, the waveguide layer, and the clad layer, adjacent to the laser diode section, and a high reflection coating disposed on the other side walls, of the substrate, the waveguide layer, and the clad layer, adjacent to the phase adjustment section.
    Type: Grant
    Filed: September 5, 2019
    Date of Patent: May 25, 2021
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Namje Kim, O-Kyun Kwon, Miran Park, Tae-Soo Kim, Shinmo An, Won Seok Han
  • Patent number: 11018477
    Abstract: A tunable laser device is described. In one example, the tunable laser device includes an adaptive ring mirror, a gain waveguide, a loop mirror waveguide, and a booster amplifier waveguide. The gain waveguide and the boost amplifier waveguide can be formed in a semiconductor optical amplifier (SOA) region of the tunable laser device, and the adaptive ring mirror and the loop mirror waveguide can be formed in a silicon photonics region of the tunable laser device. The adaptive ring mirror includes a phase shifter optically coupled between a number of MMI couplers. By inducing a phase shift using the phase shifter, the wavelength of the output of the tunable laser device can be altered or adjusted for use in coherent fiber-optic communications, for example, among other applications.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: May 25, 2021
    Assignee: MACOM Technology Solutions Holdings, Inc.
    Inventor: Haruhisa Soda
  • Patent number: 10992107
    Abstract: The present disclosure discloses a narrow-linewidth laser. The narrow-linewidth laser comprises a passive ring waveguide, a first passive input/output waveguide which is coupled with the passive ring waveguide, a gain wavelength-selection unit which is used for providing gain for the whole laser and is configured to be capable of selecting the light with a specific wavelength to be coupled into the passive ring waveguide, and a second passive input/output waveguide which is coupled with the passive ring waveguide in order to output lasing light from the laser. The narrow-linewidth semiconductor laser provided by the present disclosure has a simple structure and does not have butt-joint coupling loss between a gain region and a waveguide external cavity region. There is no a linewidth limitation caused by butt-coupling loss in such semiconductor lasers.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: April 27, 2021
    Assignee: Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences
    Inventor: Ruiying Zhang
  • Patent number: 10942417
    Abstract: A tunable comb generator may include a light source to generate an optical signal, an intensity modulator to modulate an intensity of the optical signal from the light source based on a RF drive signal, a frequency-locking loop (FLL) to maintain an optical frequency of the optical signal received from the intensity modulator at a target optical frequency corresponding to a resonance frequency of a periodic optical filter in the FLL, and an optoelectronic oscillator (OEO) loop. The OEO loop may include a photodetector to generate the RF drive signal based on the optical signal from the FLL, a tunable phase shifter to select a resonance frequency of the OEO loop corresponding to a harmonic of the resonance frequency of the periodic optical filter, and one or more phase modulators to generate an optical comb signal by modulating a portion of the optical signal from the FLL.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: March 9, 2021
    Assignee: University of Central Florida Research Foundation, Inc.
    Inventors: Michael Plascak, Ricardo Bustos Ramirez, Peter Delfyett
  • Patent number: 10944025
    Abstract: A light-emitting diode including: a first n-doped semiconductor layer configured to form a cathode, and a second p-doped semiconductor layer configured to form an anode, and together forming a p-n junction of the diode; an active zone located between the first layer and the second layer, including at least two emissive layers including a semiconductor capable of forming quantum wells, and a plurality of semiconductor barrier layers such that each emissive layer is located between two barrier layers; an n-doped semiconductor buffer layer located between the first layer and the active zone, the n-dope semiconductor of the buffer layer having a band gap energy less than or equal to about 97% of the band gap energy of the p-doped semiconductor of the second layer.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: March 9, 2021
    Assignee: Commissariat a l'energie atomique et aux energies alternatives
    Inventors: Ivan-Christophe Robin, Hubert Bono
  • Patent number: 10935482
    Abstract: In one aspect, the present teachings provide a system for performing cytometry that can be operated in three operational modes. In one operational mode, a fluorescence image of a sample is obtained by exciting one or more fluorophore(s) present in the sample by an excitation beam formed as a superposition of a top-hat-shaped beam with a plurality of beams that are radiofrequency shifted relative to one another. In another operational mode, a sample can be illuminated successively over a time interval by a laser beam at a plurality of excitation frequencies in a scanning fashion. The fluorescence emission from the sample can be detected and analyzed, e.g., to generate a fluorescence image of the sample. In yet another operational mode, the system can be operated to illuminate a plurality of locations of a sample concurrently by a single excitation frequency, which can be generated, e.g., by shifting the central frequency of a laser beam by a radiofrequency.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: March 2, 2021
    Assignee: Becton, Dickinson and Company
    Inventors: Eric D. Diebold, Keegan Owsley, Jonathan Lin
  • Patent number: 10892593
    Abstract: A laser device for laser resonance ionization includes a wavelength variable grating-type titanium-doped sapphire laser and includes a titanium (Ti) doped titanium sapphire crystal disposed within a resonator. The titanium sapphire crystal is fixedly disposed on a stage. The titanium-doped sapphire crystal can be moved in the optical axis direction by the stage, thereby changing the position of the titanium-doped sapphire crystal. The switching between the wideband mode and the high-output mode can be performed by changing the position of the titanium-doped sapphire crystal.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: January 12, 2021
    Assignees: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, KOGAKUIN UNIVERSITY
    Inventors: Hideki Tomita, Daiki Matsui, Tetsuo Sakamoto
  • Patent number: 10862267
    Abstract: A method for controlling the emission frequency of a laser comprises: recording a first spectrum by passing a laser light emitted by the laser through a sample onto a detector, the detector being connected to a multichannel analyzer which assigns pulses detected by the detector to a channel; determining a first channel to which the maximum of a first signal in the first spectrum has been assigned; determining a second channel to which the maximum of a second signal in the first spectrum has been assigned; recording a second spectrum in analog fashion like the first spectrum; determining whether the maximum of the first signal in the second spectrum has been assigned to the first channel and whether the maximum of the second signal in the second spectrum has been assigned to the second channel; adjusting the operating temperature of the laser in the event of deviations determined in the previous step.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: December 8, 2020
    Assignee: HUMEDICS GMBH
    Inventors: Axel Luchterhand, Alexander Helmke, Tom Rubin, Karsten Heyne
  • Patent number: 10861682
    Abstract: An apparatuses relating generally to a test wafer, processing chambers, and method relating generally to monitoring or calibrating a processing chamber, are described. In one such an apparatus for a test wafer, there is a platform. An optical fiber with Fiber Bragg Grating sensors is located over the platform. A layer of material is located over the platform and over the optical fiber.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: December 8, 2020
    Assignee: iSenseCloud, Inc.
    Inventors: William J. O'Banion, An-Dien Nguyen, Huy D. Nguyen
  • Patent number: 10859888
    Abstract: Disclosed is a system for generating short or ultra-short light pulses, including a light source configured to emit temporally continuous-wave light radiation, an electrical generator configured to operate at a tunable frequency in a passband included between 5 and 100 GHz and to emit an analogue modulating electrical signal including at least one electrical pulse of duration included between 10 ps and 100 ps, and an electro-optical modulator having electrodes and an electrical passband that are suitable for receiving the analog modulating electrical signal, the electro-optical modulator being configured to optically amplitude modulate the continuous-wave light radiation depending of the analog modulating electrical signal and to generate modulated light radiation including at least one light pulse of duration included between 10 ps and 100 ps.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: December 8, 2020
    Assignee: IRISIOME
    Inventors: Romain Royon, Romain Dubrasquet
  • Patent number: 10855379
    Abstract: A communication device includes a transmitter configured to generate a data signal, and a controller configured to stop an operation of the transmitter in response to an optical transmission stop instruction. The optical transmission stop instruction preferably has a predetermined bit pattern.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: December 1, 2020
    Assignee: Sony Corporation
    Inventors: Toshihisa Hyakudai, Masanari Yamamoto, Takeshi Ogura, Tsugita Komatsu, Hiroshi Morita, Gen Ichimura
  • Patent number: 10847948
    Abstract: A system and methods are drawn to a self-injection locked tunable laser using an InGaN/GaN gain chip to produce precise laser output at visible wavelengths. An external cavity length is adjusted by motorized stage to tune a resonance frequency of the external cavity to match the resonance frequency of the laser and self-injection lock the mode of the wavelength. Fine tuning is provided by adjusting the tilt angle of the partially reflective mirror. The laser diode may be operated at a range of injection currents and temperatures and provides precise control of output laser wavelengths and linewidths.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: November 24, 2020
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Mohammed Zahed Mustafa Khan, Md. Hosne Mobarok Shamim, Tien Khee Ng, Boon S. Ooi
  • Patent number: 10830954
    Abstract: An optical coupling device is described herein. The optical coupling device comprises a first waveguide and a second waveguide that are formed on a common substrate, and a resonator that is positioned out of plane with the two waveguides. The resonator and waveguides are positioned such that light traveling in each of the waveguides evanescently couples to the resonator but not to the other of the waveguides. The optical coupling device can be used in connection with improving linewidth of a laser source for a lidar sensor. In another example, the optical coupling device can be used in connection with wavelength division multiplexing.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: November 10, 2020
    Assignee: GM Cruise Holdings LLC
    Inventors: Jacob Levy, Vala Fathipour, Lutfollah Maleki, Vladimir S. Ilchenko
  • Patent number: 10827152
    Abstract: Disclosed herein is a novel a tunable Micro-Electro-Mechanical (MEMS) Etalon system including: a functional layer patterned to define a suspension structure for suspending a first mirror being an aperture mirror of the Etalon, an aperture mirror coupled to the suspension structure, and a back layer including a second mirror, being a back mirror of the Etalon. The functional layer may be located above the back layer and the back layer may include spacer structures protruding therefrom towards the aperture mirror to define a minimal gap between the aperture mirror and the back mirror and prevent collision between them. The aspect ratio between the width of the etalon/mirrors may be high (e.g. at least 500), and the minimal gap/distance between the mirrors may be small in the order of tens of nanometers (nm).
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: November 3, 2020
    Assignee: TECHNOLOGY INNOVATION MOMENTUM FUND (ISRAEL) LIMITED PARTNERSHIP
    Inventors: Viacheslav Krylov, Ariel Raz, David Mendlovic
  • Patent number: 10826272
    Abstract: An optical source may include an optical gain chip that provides an optical signal and that is optically coupled to an SOI chip. The optical gain chip may include a reflective layer. Moreover, the SOI chip may include: a first optical waveguide, a first ring resonator that selectively optically coupled to a second optical waveguide and that performs phase modulation and filtering of the optical signal, the second optical waveguide, an amplitude modulator, and an output port. Note that the reflective layer in the optical gain chip and the amplitude modulator may define an optical cavity. Furthermore, a resonance of the first ring resonator may be aligned with a lasing wavelength, and the resonance of the first ring resonator and a resonance of the amplitude modulator may be offset from each other. Additionally, modulation of the first ring resonator and the amplitude modulator may be in-phase with each other.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: November 3, 2020
    Assignee: Axalume, Inc.
    Inventors: Jock Bovington, Xuezhe Zheng, Saman Saeedi, Ashok V. Krishnamoorthy
  • Patent number: 10816463
    Abstract: A laser spectrometer includes a tunable laser assembly, a periodically-poled nonlinear optical crystal, with parallel polished input and output end faces, and a mechanism for controlling an entrance location of a pump input beam of the tunable laser on the input end face of the periodically-poled nonlinear optical crystal, such that the pump input beam traverses different grating periods of the periodically-poled nonlinear optical crystal.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: October 27, 2020
    Assignee: United States of America as represented by the Administrator of NASA
    Inventors: Kenji Numata, Haris Riris, Stewart T. Wu, Xiaoli Sun
  • Patent number: 10788633
    Abstract: In example implementations, an apparatus is provided. The apparatus includes an optical transmission component and an optical reception component. The optical transmission component includes a plurality of lasers and a transmit filter. The plurality of lasers each emit a different wavelength of light. The transmit filter includes a plurality of different regions that correspond to one of the different wavelengths of light emitted by the plurality of lasers. The optical reception component includes a plurality of photodiodes and a complementary reverse order (CRO) filter. The CRO filter includes a same plurality of different regions as the transmit filter in a reverse order.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: September 29, 2020
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Kevin B. Leigh, Paul Kessler Rosenberg, Sagi Mathai, Wayne Victor Sorin, Michael Renne Ty Tan, Georgios Panotopoulos
  • Patent number: 10781096
    Abstract: A MEMS device includes a substrate, a MEMS element portion disposed on a surface of the substrate, a cap having a cavity formed to oppose the MEMS element portion, and a diffusion prevention layer formed on at least a portion of the cap, wherein at least one of the cap and the substrate includes a bonding layer disposed outside of the cavity, and wherein the cap includes a spreading prevention portion disposed between the bonding layer and the cavity and having a V-shape in cross-section.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: September 22, 2020
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Tae Hun Lee, Kwang Su Kim, Tae Yoon Kim
  • Patent number: 10784652
    Abstract: There is disclosed a DBR laser and a method of use. The DBR laser comprises a phase section in a cavity of the DBR laser and configured to adjust an optical path length of the cavity. A DBR section comprises a frequency tuning system configured to adjust a Bragg frequency of the DBR section. A detector is configured to detect laser light transmitted through the DBR section.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: September 22, 2020
    Assignee: Lumentum Technology UK Limited
    Inventors: Samuel Davies, Andrew John Ward, Andrew Cannon Carter
  • Patent number: 10749314
    Abstract: A method of determining initial parameters and target values for tuning an emission wavelength of a wavelength tunable laser capable of emitting laser light in a substantial wavelength range is disclosed. The method iterates an evaluation of initial parameters and target values at target wavelengths in a preset order. The evaluation includes steps of supplying empirically obtained parameters to the t-LD, confirming whether the t-LD generates an optical beams, determining the initial parameters and the target values by carrying out feedback loops of the AFC and the APC when the t-LD generates the optical beam, or shifting the wavelength range so as to exclude the current target wavelength when the t-LD generates no optical beam.
    Type: Grant
    Filed: September 5, 2019
    Date of Patent: August 18, 2020
    Assignee: Sumitomo Electric Device Innovations, Inc.
    Inventor: Hirokazu Tanaka
  • Patent number: 10741999
    Abstract: Methods, systems, and apparatus, including a laser including a layer having first and second regions, the first region including a void; a mirror section provided on the layer, the mirror section including a waveguide core, at least part of the waveguide core is provided over at least a portion of the void; a first grating provided on the waveguide core; a first cladding layer provided between the layer and the waveguide core and supported by the second region of the layer; a second cladding layer provided on the waveguide core; and a heat source configured to change a temperature of at least one of the waveguide core and the grating, where an optical mode propagating in the waveguide core of the mirror section does not incur substantial loss due to interaction with portions of the mirror section above and below the waveguide core.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: August 11, 2020
    Assignee: Infinera Coropration
    Inventors: Peter W. Evans, Mingzhi Lu, Fred A. Kish, Jr., Vikrant Lal, Scott Corzine, John W. Osenbach, Jin Yan
  • Patent number: 10727938
    Abstract: Systems, methods, and structures for overcoming Rayleigh backscatter in wavelength division multiplexed fiber optic systems and in particular fiber optic sensor systems along with method(s) for detecting faults in optical networks employing the intentional temporal separation of share wavelength noise and demarcation signals in conjunction with the use of accumulated Rayleigh noise signal(s) to detect a fault location.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: July 28, 2020
    Assignee: Luna Innovations Incorporated
    Inventors: Todd Christian Haber, Justin Stay, Joel Leslie Mock, Daniele Costantini
  • Patent number: 10720746
    Abstract: An optical element includes an optical waveguide layer. The optical waveguide includes a periodic structure of grooves. The optical waveguide layer has a layer-thickness equal to or greater than 1.5 ?m and is made of material selected from a group consisting of Ta2O5, Al2O3, LiNbO3, LiTaO3, AlN, GaN, SiC, and Yttrium aluminum garnet (YAG). (D/0.5?)?2.5 is satisfied where D indicates the depth of groove; and ? indicates the pitch of the arranged grooves in the periodic structure. The unit of ? is identical to the unit of D.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: July 21, 2020
    Assignee: NGK Insulators, Ltd.
    Inventors: Kousuke Niwa, Jungo Kondou, Shoichiro Yamaguchi, Keiichiro Asai
  • Patent number: 10714895
    Abstract: An optical source may include an optical gain chip that provides an optical signal and that is optically coupled to an SOI chip. The optical gain chip may include a reflective layer. Moreover, the SOI chip may include: a common optical waveguide, a splitter that splits the optical signal into optical signals, a first pair of resonators that are selectively optically coupled to the common optical waveguide and that are configured to perform modulation and filtering of the optical signals, and a first bus optical waveguide that is selectively optically coupled to the first pair of resonators. Furthermore, resonance wavelengths of the resonators may be offset from each other with a (e.g., fixed) separation approximately equal or corresponding to a modulation amplitude, and a reflectivity of the first pair of resonators may be approximately independent of the modulation.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: July 14, 2020
    Assignee: Axalume, Inc.
    Inventors: Ashok V. Krishnamoorthy, Jock Bovington, Xuezhe Zheng, Saman Saeedi