Patents Examined by Eric L Bolda
  • Patent number: 10931079
    Abstract: In a Brillouin sensing system using optical microwave frequency discriminators and a scrambler provided by the present invention, a laser signal outputted by a distributed feedback laser is divided into two paths of optical signals through a coupler, one path of optical signal is modulated by a modulator to act as a pump light signal and then is transmitted to sensing fibers through a circulator; another path of optical signal is modulated by another modulator to act as a detecting light signal and then directly enters the sensing fibers. When the frequency difference between the pump light and the detecting light is equal to the Brillouin frequency shift of a certain region in the fibers, the region produces the stimulated Brillouin scattering effect, so that through determining the frequency shift and power of the Brillouin scattering signal, the temperature and stress of the sensing fibers are obtained.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: February 23, 2021
    Assignees: Zibo Qi-Red PhotoElectric Technology Co., Ltd., Beijing Qi-Red PhotoElectric Technology Co., Ltd.
    Inventors: Shudong Wu, Wenbo Wang
  • Patent number: 10921451
    Abstract: A laser device includes a light source that emits light; a first reflector that reflects the light toward a predetermined range; a second reflector that reflects the light reflected from the predetermined range; a light receiver that receives the light reflected by the second reflector; a driver that swings the first and the second reflector in an angular range corresponding to the predetermined range; and a calculator that: stores first information about the light reflected by the first reflector toward the predetermined range and second information about the light received by the light receiver; and measures movement speed and movement direction of a target reflecting the light from the first reflector based on the first and the second information.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: February 16, 2021
    Assignee: Funai Electric Co., LTD.
    Inventors: Yuichiro Masuda, Yasuo Masaki, Manabu Murayama
  • Patent number: 10917581
    Abstract: There is provided an optical distance measurement system including an image sensor and a processing unit. The processing unit is configured to generate an image to be calculated according to at least one image captured by the image sensor, wherein different image regions of the image to be calculated correspond to different exposure times thereby improving the accuracy of the distance calculation.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: February 9, 2021
    Inventors: Guo-Zhen Wang, Shiaw-Yu Jou
  • Patent number: 10916909
    Abstract: Disclosed are fiber amplifiers with multiple pumping sources including multiple optical sources or an optical comb source with multiple spectral lines. A comb source may include generating a plurality of evenly spaced or nearly evenly spaced spectral lines. The optical comb source may pump a fiber by propagating optical energy at the multiple spectral lines through the fiber. The comb source may cause gain in the fiber at in a band of wavelengths different from the spectral lines of the comb source. A weak signal injected into the fiber that propagates in the fiber will experience optical gain in the fiber producing an amplified signal at the wavelength within a band of wavelengths different from the comb source wavelengths. When the bandwidth of the multiple bands of gain is wide, the amplifier may be referred to as an ultra-wideband amplifier.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: February 9, 2021
    Assignee: Facebook, Inc.
    Inventors: Nitin Kumar Goel, Satyajeet Singh Ahuja, Gayathrinath Nagarajan, Stephen Gregory Grubb
  • Patent number: 10908286
    Abstract: Technology for light detection and ranging (LIDAR) sensor can include an optical signal source, an optical modulation array and optical detector on the same integrated circuit (IC) chip, multi-chip module (MCM) or similar solid-state package.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: February 2, 2021
    Assignee: Intel Corporation
    Inventors: Avi Feshali, Haisheng Rong
  • Patent number: 10908287
    Abstract: In described examples, an integrated circuit includes a modulator configured to modulate a driving signal for an optical transmitter with a narrow band modulation signal in which the driving signal with a fixed duration is transmitted to the optical transmitter periodically. The integrated circuit also includes a demodulator configured to receive a signal from an optical receiver that is configured to receive a reflection of light transmitted by the optical transmitter off an object, the demodulator configured to discriminate the narrow band modulation signal and estimate a distance of the object using the narrow band modulation signal.
    Type: Grant
    Filed: December 31, 2016
    Date of Patent: February 2, 2021
    Inventors: Nirmal C. Warke, David P. Magee, Baher S. Haroun
  • Patent number: 10901074
    Abstract: Methods and systems for providing eye-safe compatible receiver for a light detection and ranging system. The light detection and ranging system comprises; an emitting unit comprising a light source configured to emit a sequence of light pulses of a first wavelength into a three-dimensional environment; and a receiving module comprising a detector for detecting light pulses of a second wavelength, in which the second wavelength is shorter than the first wavelength, the receiving module further comprising a wavelength converter coupled to the detector and configured to convert an echo signal of the emitted light pulses into the light pulses of the second wavelength.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: January 26, 2021
    Inventors: Zhengqing Pan, Shixiang Wu, Shaoqing Xiang, Kai Sun
  • Patent number: 10897117
    Abstract: A multi-path optical amplification system includes a modulated light source emitting ?1 modulated light, a first signal splitter coupled to receive the modulated ?1 light providing a first ?1 modulated light signal and second ?1 modulated light signal. A first optical amplifier is for receiving the first ?1 modulated light signal and generating a first amplified output signal, and a second optical amplifier is for receiving the second ?1 modulated light signal and generating a second amplified output signal. A first collimator assembly is coupled to receive the first amplified output signal and provide a first output beam having a first beam divergence (D1) and a second collimator assembly is coupled to receive the second amplified output signal and provide a second output beam having a second beam divergence (D2).
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: January 19, 2021
    Inventors: Efstratios Kehayas, Leontios Stampoulidis
  • Patent number: 10897115
    Abstract: Methods and systems are disclosed for using a chromatic lens system to provide a “flying focus”—i.e., an advanced focusing scheme enabling spatiotemporal control of a focal location. In a method, a photon beam is emitted from a source at a wavelength. The photon beam may have more than one wavelength. The photon beam is focused to a focal location using a chromatic lens system. The focal location is at a first longitudinal distance along an optical axis from the chromatic lens system. The wavelength of the photon beam is changed as a function of time to change the focal location as a function of time. The wavelength may be changed such that the focal location changes with a focal velocity.
    Type: Grant
    Filed: September 30, 2017
    Date of Patent: January 19, 2021
    Assignee: University of Rochester
    Inventors: Dustin H. Froula, Terrance Kessler
  • Patent number: 10890662
    Abstract: A distance from an apparatus to at least one object is determined by generating a first signal and generating light modulated by the first signal to be emitted from the apparatus. Light reflected by the at least one object is detected using a Time-of-flight detector array, wherein each array element of the Time-of-flight detector array generates an output signal from a series of photon counts over a number of consecutive non-overlapping time periods. The output signals are compared to the first signal to determine at least one signal phase difference. From this at least one signal phase difference a distance from the apparatus to the at least one object is determined.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: January 12, 2021
    Assignee: STMicroelectronics (Research & Development) Limited
    Inventors: John Kevin Moore, Neale Dutton, Jeffrey M. Raynor
  • Patent number: 10884107
    Abstract: A laser scanning sensor (100) includes: a head part (110) having a shape inscribed in a virtual cube, wherein the head part has a wiring hole (122) oriented to an intersection of three mutually orthogonal planes in the cube, and attachment portions (123a-123c) provided one each at inscribed points in the three planes, and wherein the head part is further configured to acquire range information in each measurement direction by containing a laser range finder (111) and a scanning mechanism (112) for changing a measurement direction by the laser range finder (111); a base part (140) configured to be mounted on an installation surface; and a joint part (130) configured to join any one of the attachment portions (123a-123c) in the head part (110) with the base part (140).
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: January 5, 2021
    Assignee: OPTEX CO., LTD.
    Inventor: Keisuke Katsumi
  • Patent number: 10887015
    Abstract: A radio frequency (RF) photonic equalizer may include a first electro-optic (E/O) modulator configured to modulate an optical carrier based upon an RF input signal, a stimulated Brillouin scattering (SBS) medium coupled to the first E/O modulator, and a second E/O modulator configured to modulate the optical carrier based upon an equalizing function waveform. An optical circulator may be coupled to the SBS medium and the second E/O modulator, and a photodetector may be coupled to the optical circulator.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: January 5, 2021
    Inventors: Charles F. Middleton, Anthony C. Klee, Elliott J. Grafer, John Richard Desalvo, Alexander D. Cramer
  • Patent number: 10879665
    Abstract: The present disclosure relates to systems and methods for reducing thermal effects in double-clad clad optical fiber amplifying systems via control of the pump absorption. One optical fiber amplifying system for reducing thermal effects includes one or more first optical pump sources, each configured to output radiation of a pump wavelength, a bridge optical fiber, having an input configured to receive the radiation of the pump wavelength output by the one or more first optical pump sources and an output, and an active optical fiber that has a first end substantially directly coupled to the output of the bridge optical fiber and a second end. The active optical fiber is configured to amplify radiation of the first active wavelength when pumped with radiation of the pump wavelength.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: December 29, 2020
    Assignee: Nufern
    Inventors: Clemence Jollivet, Kevin Farley, Kanishka Tankala, John Edgecumbe
  • Patent number: 10859676
    Abstract: A time of flight based depth detection system is disclosed that includes a projector configured to sequentially emit multiple complementary illumination patterns. A sensor of the depth detection system is configured to capture the light from the illumination patterns reflecting off objects within the sensor's field of view. The data captured by the sensor can be used to filter out erroneous readings caused by light reflecting off multiple surfaces prior to returning to the sensor.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: December 8, 2020
    Assignee: Magic Leap, Inc.
    Inventors: David Cohen, Assaf Pellman, Robert D. TeKolste, Shlomo Felzenshtein, Giora Yahav
  • Patent number: 10859679
    Abstract: A sample and hold system, for capturing and reading a sequence of traces of an input signal. The sample and hold system comprising a readout device, a controller, and a sample and hold array of unit cells. The controller is configured for controlling the sample and hold system, such that during an acquisition phase a trace of samples is taken from the input signal in an original sample order and such that the samples are held in the unit cells wherein the samples are assigned to the unit cells in an acquisition order, such that during a consecutive readout phase the samples are read out from the unit cells wherein the order in which the unit cells are read out corresponds with a readout order, and such that the acquisition order and/or the readout order differs from trace to trace.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: December 8, 2020
    Assignee: Melexis Technologies NV
    Inventors: Saad Ahmad, Volodymyr Seliuchenko, Sharath Patil, Darrell Livezey, Marcelo Mizuki
  • Patent number: 10862263
    Abstract: Good femtosecond fiber laser performance is achieved by producing picosecond Raman shifted pulses of sufficient intensity to undergo self-phase modulation (SPM), thus causing the pulses to advantageously spread spectrally, which then makes it possible to temporally compress the pulses with an optical compressor to produce femtosecond pulses with high peak power.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: December 8, 2020
    Inventors: Alaa Al-Kadry, Vladimir Karpov, Wallace Raymond Lovett Clements
  • Patent number: 10855044
    Abstract: An optical amplifier includes an input port for receiving an input optical signal; a wavelength division multiplexer (204) having a first input coupled to the input port, a second input coupled to a pump source (206), and an output coupled to an amplification fiber (208); and an integrated component (210) configured to provide output monitoring and isolation, wherein the integrated component (210) is configured to separate a first portion of a light signal received from the amplification fiber (208), direct the first portion to a photo detector, direct a second portion of the input light from the amplification fiber (208) to an output port, and attenuate light signals received from the output port.
    Type: Grant
    Filed: September 7, 2015
    Date of Patent: December 1, 2020
    Assignee: Molex, LLC
    Inventors: Fengqing Zhou, Tian Zhu, Haifeng Lv, Yu Hu
  • Patent number: 10855045
    Abstract: A multiple-output laser component is described with a plurality of diode lasers in a common package, each of the diode lasers having distinct electrical control and optically coupled to a distinct output fiber, the component configured such that up to a maximum total output power can be selectively and dynamically partitioned among said diode lasers. The dynamic allocation can be based on demand for laser power in a fiber optic coupled to each diode laser. The multi-output laser component can be used to drive amplifiers associated with a multicast switch in some embodiments.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: December 1, 2020
    Assignee: NeoPhotonics Corporation
    Inventors: Ilya Vorobeichik, Edward C. Vail, Anthony J. Ticknor
  • Patent number: 10855051
    Abstract: What is shown is a method for manufacturing a semiconductor light source. The semiconductor light source has a substrate and a layer sequence arranged above the substrate, the same having a light-emitting layer and an upper boundary layer arranged above the light-emitting layer. The layer sequence is patterned in order to form a light-emitting stripe for defining the semiconductor light source and an alignment stripe, extending in parallel thereto, as a horizontal alignment mark at the same time. Then, a cover layer is applied on the patterned layer sequence and a part of the cover layer is removed in order to expose the alignment stripe and expose a region of the layer sequence outside the light-emitting stripe and spaced apart from a light-entrance edge or a light-exit edge of the light-emitting stripe as a vertical alignment mark.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: December 1, 2020
    Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
    Inventors: Martin Möhrle, Michael Theurer, Ariane Sigmund, Ute Troppenz
  • Patent number: 10852396
    Abstract: Examples relate to a turntable peripheral for three dimensional (3D) scanning. In some examples, 3D scan data of a real-world object is obtained while the object is rotated by the turntable peripheral. Positioning commands are sent to the turntable peripheral to rotate the object. The 3D scan data is collected while the turntable peripheral is in an untilted and/or tilted position.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: December 1, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: David Bradley Short, Jinman Kang, Stephen George Miller, Jordi Morillo Peres, Eric Monsef, Ben Wynne, Matthew Leck, Daniel Jordan Kayser, Eddie Licitra, Christopher S Tanner