Optical Fiber Laser Patents (Class 372/6)
  • Patent number: 11899211
    Abstract: A near-eye display device comprises a pupil-expansion optic, a laser, a drive circuit coupled operatively to the first and second lasers, a spatial light modulator (SLM), and a computer. The SLM has a matrix of electronically controllable pixel elements and is configured to receive emission from the laser and to direct the emission in spatially modulated form to the pupil-expansion optic. Coupled operatively to the drive circuit and to the SLM, the computer is configured to parse a digital image, trigger the emission from the laser by causing the drive circuit to drive a periodic current through a gain structure of the laser, and control the matrix of pixel elements such that the spatially modulated form of the emission projects an optical image corresponding to the digital image, wherein the periodic current includes plural cycles of modulation driven through the gain structure while the optical image is projected.
    Type: Grant
    Filed: June 24, 2021
    Date of Patent: February 13, 2024
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Raymond Kirk Price, Michael Bleyer, Christopher Douglas Edmonds
  • Patent number: 11885746
    Abstract: One or more embodiments relates to a method of growing ultrasmooth and high quantum efficiency CsTe photocathodes. The method includes exposing a substrate of Cs using an alkali source such as an effusion cell; and controlling co-evaporating growth and co-deposition forming a CsTe growth. The method further includes monitoring a stoichiometry of the CsTe growth.
    Type: Grant
    Filed: August 26, 2022
    Date of Patent: January 30, 2024
    Assignee: United States Department of Energy
    Inventors: Dustin McIntyre, Daniel Hartzler
  • Patent number: 11815782
    Abstract: A mid-infrared broadband laser including: a femtosecond laser configured to generate a near-infrared light; nonlinear waveguide configured to broaden and/or shift a spectrum of the light from the femtosecond laser; and a nonlinear medium configured to generate a broadband light by mixing spectral components of the output from the non-linear waveguide. Optionally, at least one dispersion compensation element may be placed between the femtosecond laser and the nonlinear waveguide and/or between the nonlinear waveguide and the nonlinear medium.
    Type: Grant
    Filed: February 15, 2022
    Date of Patent: November 14, 2023
    Assignee: Thorlabs, Inc.
    Inventors: Reza Salem, Peter Fendel, Sterling Backus, Dongfeng Liu, Chenchen Wan
  • Patent number: 11811188
    Abstract: Embodiments relate to a resonator including a graphene layer formed on a support, and a tapered fiber disposed around at least part of the support, close to the graphene layer, wherein the tapered fiber has different paths along which light travels in a region extending from one end and a region extending from the other end, and a passive-mode-locked pulse laser oscillation system including the same.
    Type: Grant
    Filed: May 28, 2021
    Date of Patent: November 7, 2023
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Yong-Won Song, Sungjae Lee
  • Patent number: 11796889
    Abstract: The invention relates to a frequency conversion arrangement (100) for optimising properties of a harmonic of a laser, in particular a beam profile and/or a long-term stability, the arrangement comprising:—a first non-linear crystal (X1), which is designed to convert a first wavelength (?1) partially into a second wavelength (?2); and—an optical unit, which in particular comprises at least one prism (P), which is designed in such a way as to influence the main axes (x1, y1, x2, y2) of the beam profiles of the first wavelength (?1) and/or the second wavelength (?2) differently; and—a second non-linear crystal (X2), which is designed in such a way as to generate a third wavelength (?3) from the unconverted part of the first wavelength (?1) and/or the second wavelength (?2), the second non-linear crystal (X2) having an entry face (A1) and an exit face (A2), and the exit face (A2) running obliquely to the entry face (A1).
    Type: Grant
    Filed: November 24, 2020
    Date of Patent: October 24, 2023
    Assignee: NOVANTA EUROPE GMBH
    Inventor: Axel Reiser
  • Patent number: 11786306
    Abstract: A surgical laser system (100) includes a first laser source (140A), a second laser source (140B), a beam combiner (142) and a laser probe (108). The first laser source is configured to output a first laser pulse train (144, 104A) comprising first laser pulses (146). The second laser source is configured to output a second laser pulse train (148, 104B) comprising second laser pulses (150). The beam combiner is configured to combine the first and second laser pulse trains and output a combined laser pulse train (152, 104) comprising the first and second laser pulses. The laser probe is optically coupled to an output of the beam combiner and is configured to discharge the combined laser pulse train.
    Type: Grant
    Filed: November 23, 2021
    Date of Patent: October 17, 2023
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Wen-Jui Ray Chia, Rongwei Jason Xuan, Thomas C. Hasenberg, Jian James Zhang, Steven Yihlih Peng, Danop Rajabhandharaks
  • Patent number: 11759886
    Abstract: A laser system is configured for providing a laser line in a working plane for line illumination of an object. The laser line extends in a first direction over a significant length and in a second direction over a small extent. The laser system comprises a laser source for providing a laser beam as basis for an elongated input laser beam propagating along a propagation direction, and a homogenization and focussing unit for homogenizing the elongated laser beam to form the laser line. The laser system is in particular suitable for providing a laser line that can be stitched to another laser line of a respective further laser system.
    Type: Grant
    Filed: June 10, 2022
    Date of Patent: September 19, 2023
    Assignee: TRUMPF LASER GMBH
    Inventors: Martin Huonker, Christoph Tillkorn, Stefan Dorer
  • Patent number: 11757247
    Abstract: A pulsed light generation device, includes: a first optical fiber through which first pulsed light and second pulsed light, having an intensity that decreases while an intensity of the first pulsed light increases, and increases while the intensity of the first pulsed light decreases, having been multiplexed and entered therein, are propagated; and a second optical fiber at which the first pulsed light, having exited the first optical fiber and entered therein, is amplified while being propagated therein, wherein: at the first optical fiber, phase modulation occurs in the first pulsed light due to cross phase modulation caused by the second pulsed light; and self-phase modulation occurring in the first pulsed light at the second optical fiber is diminished by the phase modulation having occurred at the first optical fiber.
    Type: Grant
    Filed: December 20, 2021
    Date of Patent: September 12, 2023
    Assignee: NIKON CORPORATION
    Inventor: Akira Tokuhisa
  • Patent number: 11726407
    Abstract: Provided are an integrated super-resolution laser direct-writing device and a direct-writing method. The integrated super-resolution laser direct-writing device includes a first continuous laser, a first optical fiber coupler, a mono-mode optical fiber, a second continuous laser, a second optical fiber coupler, a first annular photonic crystal fiber, a bifurcated optical fiber, a lens group, a first dichroic mirror, an LED light source, a lens, a second dichroic mirror, an auto-focusing module, a third dichroic mirror, a third optical fiber coupler, a square-law graded index fiber, a nanometer displacement table, a second lens, a CMOS camera and a control system. According to the present invention, an original large direct-writing device based on a free optical path can achieve optical fibers of key devices and integration of systems and can be better applied to the field of laser direct-writing.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: August 15, 2023
    Assignee: Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences
    Inventors: Aijun Zeng, Tiecheng Liu, Jingpei Hu, Linglin Zhu, Huijie Huang
  • Patent number: 11715930
    Abstract: A system for controlling a pulsed laser diode includes a power source configured to supply power to the pulsed laser diode and at least one driving branch between the power source and the pulsed laser diode. The at least one driving branch is configured to control power delivery from the power source to the pulsed laser diode. The at least one driving branch is connected to a cathode of the pulsed laser diode.
    Type: Grant
    Filed: November 3, 2020
    Date of Patent: August 1, 2023
    Assignee: BEIJING VOYAGER TECHNOLOGY CO., LTD.
    Inventors: Yibo Yu, Yue Lu, Vipul Chawla, Zhenghan Zhu, Lingkai Kong
  • Patent number: 11690278
    Abstract: A laser ablation apparatus includes: a laser beam generator including beam sources for generating laser beams, the laser beam generator using a solid-state laser; an output beam generator for generating an output beam using the laser beams; and a substrate stage including at least one stage on which a carrier substrate formed on the front of a panel substrate is disposed. The output beam generator may include: mixers for generating mixed laser beams having two linear-polarizations orthogonal to each other by mixing the laser beams; and a photo molding machine for generating the output beam using the mixed laser beams.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: June 27, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Joon Hyung Kim, Young Su Chae, Woo Hyun Kim, Seung Jun Lee
  • Patent number: 11677207
    Abstract: A fiber optic ring laser, and non-transitory computer readable medium for using a fiber optic ring laser are disclosed. The disclosed fiber optic ring laser includes a semiconductor booster optical amplifier (BOA), as a gain medium; a Fiber Fabry Perot Tunable Filter (FFP-TF), as a wavelength selection element; an optical isolator (ISO) to insure unidirectional operation of the fiber optic ring laser; and a polarization controller (PC) for attaining an optimized polarization state in order to achieve a stable-generated output in terms of output power and wavelength, wherein the BOA, the FFP-TF, the ISO and the PC are coupled to form a ring configuration that implements a continuously tunable booster amplifier-based fiber ring laser.
    Type: Grant
    Filed: April 8, 2022
    Date of Patent: June 13, 2023
    Assignee: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventor: Khurram Karim Qureshi
  • Patent number: 11670904
    Abstract: The present invention discloses a high-peak-power single-frequency narrow-linewidth nanosecond fiber laser based on a triangular pulse, wherein the laser includes: pulsed laser generated by the laser seed injecting into a first power pre-amplifier through a first isolator, and then injecting into a second pre-amplifier and then injecting into a power amplifier; wherein triangle-shaped pulsed laser with fast rising edge is obtained by using electro-optic and acousto-optic modulator to modulate continuous wave single-frequency laser or a single-frequency semiconductor laser directly modulated by radio frequency signal; single-frequency triangle-shaped pulsed laser is employed as the laser source according to the characteristics of narrow intrinsic linewidth and suppression of linewidth broadening caused by SPM, and the power of pulsed laser is amplified through the MOPA system.
    Type: Grant
    Filed: July 2, 2021
    Date of Patent: June 6, 2023
    Assignee: TIANJIN UNIVERSITY
    Inventors: Wei Shi, Chaodu Shi, Hao Tian, Quan Sheng, Jianquan Yao
  • Patent number: 11658454
    Abstract: A system and method for tuning and infrared source laser in the Mid-IR wavelength range. The system and method comprising, at least, a plurality of individually tunable emitters, each emitter emitting a beam having a unique wavelength, a grating, a mirror positioned after the grating to receive at least one refracted order of light of at least one beam and to redirect the beam back towards the grating, and a micro-electro-mechanical systems device containing a plurality of adjustable micro-mirrors.
    Type: Grant
    Filed: May 18, 2021
    Date of Patent: May 23, 2023
    Assignee: Panasonic Connect North America, Division of Panasonic Corporation of North America
    Inventors: Bien Chann, Robin Huang, Parviz Tayebati
  • Patent number: 11646542
    Abstract: A laser oscillator includes a housing, an optical fiber disposed in the housing and including a fused portion or a curved portion, an optical absorber positioned between the housing and the fused portion or the curved portion and configured to absorb leakage light from the optical fiber, a thermally conductive support column configured to support the optical absorber, and a cooling unit configured to cool the optical absorber via the thermally conductive support column.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: May 9, 2023
    Assignee: Fanuc Corporation
    Inventor: Tetsuya Chiba
  • Patent number: 11595126
    Abstract: A system and method for high speed communication are provided. The system comprises a laser-based system for communication, the system comprising: an acquisition module configured to acquire and characterize a plurality of laser beams; a tracking module configured to track the acquired laser beams, the tracking module comprising: a beaconing feedback and beam divergence mechanism configured to control a beam and detect a beam; an adaptive learning unit configured to implement an adaptive learning detection algorithm to identify and track a unique optical signature from at least one of the acquired laser beams; and a pointing module configured to point at least one laser beam towards a target based on the acquired laser beams.
    Type: Grant
    Filed: January 18, 2022
    Date of Patent: February 28, 2023
    Assignee: TRANSCELESTIAL TECHNOLOGIES PTE LTD
    Inventors: Mohammad Danesh, Rohit Jha
  • Patent number: 11583955
    Abstract: Method and system for a laser welding process employing the use of a single pulsed fiber laser source configured to generate a radiative output with a wavelength spectrum extending from about 1.8 microns to about 2.6 microns. In a specific case, the laser output from the single pulsed fiber laser source is focused onto the interface of the two pieces of materials at least one of which includes any of glasses, inorganic crystals, and semiconductors.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: February 21, 2023
    Assignee: ADVALUE PHOTONICS, INC.
    Inventors: Shibin Jiang, Jihong Geng, Qing Wang
  • Patent number: 11568636
    Abstract: A reflective cable system for a geophysical survey system includes a reflective cable that includes a conductive wire surrounded by an electrically insulating sheath and an exterior surface. The reflective cable includes reflective material that is on or visible through the exterior surface and that is configured to reflect a complete spectrum of light provided by a light source back to the light source. The reflective cable system also includes a connector electrically coupled to at least one end of the reflective cable and configured to couple to a geophysical survey system. The reflective cable may be used to locate the reflective cable in a physical environment and used to determine a position of the reflective cable using lidar or photogrammetry for generating geophysical survey models.
    Type: Grant
    Filed: April 28, 2020
    Date of Patent: January 31, 2023
    Assignee: ADVANCED GEOSCIENCES, INC.
    Inventor: Markus Lagmanson
  • Patent number: 11569632
    Abstract: Embodiments discussed herein refer to LiDAR systems and methods that enable substantially instantaneous power and frequency control over fiber lasers. The systems and methods can simultaneously control seed laser power and frequency and pump power and frequency to maintain relative constant ratios among each other to maintain a relatively constant excited state ion density of the fiber laser over time.
    Type: Grant
    Filed: February 17, 2022
    Date of Patent: January 31, 2023
    Assignee: Innovusion, Inc.
    Inventors: Rui Zhang, Yimin Li, Junwei Bao, Yufeng Li
  • Patent number: 11502476
    Abstract: A laser oscillator includes a first structure disposed with an optical section, a second structure disposed with a power source section, and an electric cable that electrically connects the optical section and the power source section. The first structure is removably coupled to the second structure, the electric cable is removably connected to at least one of the power source section and the optical section, and the optical section is allowed to be replaced.
    Type: Grant
    Filed: October 23, 2020
    Date of Patent: November 15, 2022
    Assignee: Fanuc Corporation
    Inventors: Masahiro Honda, Yuuta Sugimachi
  • Patent number: 11493605
    Abstract: Provided are a depth information camera module and a base assembly, a projection assembly, an electronic device and a manufacturing method thereof. The depth information camera module includes: a projection assembly to project a laser to a to-be-detected object; a receiving assembly, including a photosensitive element for receiving the laser reflected from the to-be-detected object; and a base assembly, the base assembly including a circuit board and a base body, the base body being supported by the circuit board, where the photosensitive element is electrically connected to the circuit board, the projection assembly circuit board is supported on a top side of the base body such that the circuit board and the projection assembly circuit board are respectively at different heights of the base assembly. Here, the projection assembly has an integral structure to facilitate assembly of the projection assembly.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: November 8, 2022
    Assignee: NINGBO SUNNY OPOTECH CO., LTD.
    Inventors: Feifan Chen, Zhongwei Wang, Qi Rong, Junjie Zeng, Hangang Wei, Beibei Dai, Minjie Pan
  • Patent number: 11482834
    Abstract: A laser system produces pulses having wavelengths between 2000 nm and 2100 nm, peak output powers greater than 1 kW, average powers greater than 10 W, pulse widths variable from 0.5 to 10 nsec, pulse repetition frequencies variable from 0.1 to over 2 MHz, and a pulse extinction of at least 60 dB. Pulses from a diode laser having a wavelength between 1000 nm and 1100 nm are amplified by at least one fiberoptic amplifier and applied as the pump input to an Optical Parametric Amplifier (OPA). A cw laser provides an OPA seed input at a wavelength between 2000 nm and 2200 nm. The idler output of the OPA having difference frequency wavelength between 2000 nm and 2100 nm is further amplified by a crystal amplifier. The fiberoptic amplifier can include Ytterbium-doped fiberoptic. The crystal amplifier can include a Ho:YAG, Ho:YLF, Ho:LuAG, and/or a Ho:Lu2O3 crystal.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: October 25, 2022
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Leonard A. Pomeranz, Scott D. Setzler, Jojit C. Torcedo
  • Patent number: 11473982
    Abstract: Disclosed herein is a method for measuring temperature via distributed temperature sensing comprising transmitting light through a fiber optic cable; detecting backscattered light in the fiber optic cable, wherein the backscattered light comprises an anti-Stokes band and a Stokes band; calculating a ratio between an intensity of the anti-Stokes band and an intensity of the Stokes band; and using the calculated ratio to determine a temperature being sensed in the fiber optic cable; wherein the fiber optic cable comprises, from the center to the periphery; a central core having a refractive index that decreases progressively from a center of the central core to an edge of the core, wherein the refractive index follows an alpha profile; wherein a bandwidth-length product of the multimode optical fiber has a value greater than 2000 MHz-km at 1550 nm.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: October 18, 2022
    Assignee: OFS FITEL, LLC
    Inventors: David D Braganza, Jie Li, Xiaoguang Sun
  • Patent number: 11467266
    Abstract: In one embodiment, a lidar system includes a light source configured to emit local-oscillator light and pulses of light, where each emitted pulse of light is (i) coherent with a corresponding portion of the local-oscillator light and (ii) includes a spectral signature of one or more different spectral signatures. The lidar system also includes a receiver configured to detect the local-oscillator light and a received pulse of light, the received pulse of light including light from one of the emitted pulses of light scattered by a target located a distance from the lidar system, the one of the emitted pulses of light including a particular spectral signature of the one or more spectral signatures. The local-oscillator light and the received pulse of light are coherently mixed together at the receiver. The receiver includes one or more detectors and a frequency-detection circuit.
    Type: Grant
    Filed: June 26, 2020
    Date of Patent: October 11, 2022
    Assignee: Luminar, LLC
    Inventors: Joseph G. LaChapelle, Jason M. Eichenholz, Alex Michael Sincore
  • Patent number: 11460554
    Abstract: A method for expanding a dynamic range of a light detection and ranging (LiDAR) system is provided. The method comprises transmitting, using a light source of the LiDAR system, a sequence of pulse signals consisting of two or more increasingly stronger pulse signals. The method further comprises receiving, using a light detector of the LiDAR system, one or more returned pulse signals corresponding to the transmitted sequence of pulse signals. The one or more returned pulse signals are above the noise level of the light detector. The method further comprises selecting a returned pulse signal within the dynamic range of the light detector, identifying a transmitted pulse signal of the transmitted sequence that corresponds to the selected returned pulse signal, and calculating a distance based on the selected returned signal and the identified transmitted signal.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: October 4, 2022
    Assignee: INNOVUSION, INC.
    Inventors: Rui Zhang, Yimin Li, Junwei Bao
  • Patent number: 11422307
    Abstract: A cladding mode stripper, includes: a resin part that covers a coating-removed section of an optical fiber and has a refractive index not less than that of an outermost shell of the optical fiber in the coating-removed section. A surface of the resin part includes an incident angle reducing structure. The surface is opposite to an interface between the resin part and the outermost shell. The incident angle reducing structure reduces a first incident angle or a first average incident angle at which cladding mode light that has entered the resin part from the optical fiber enters the surface.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: August 23, 2022
    Assignee: Fujikura Ltd.
    Inventor: Ryokichi Matsumoto
  • Patent number: 11411367
    Abstract: Multi-stage fiber amplifiers can amplify signals from a few Watts to several kilowatts. These amplifiers are limited in power by intensity instabilities resulting from a sequence of nonlinear optical effects. These nonlinear optical effects include stimulated Brillouin scattering (SBS), with produces a high-intensity pulse close to the signal wavelength that propagates backward up the amplifier chain, causing permanent damage to the upstream components. This SBS pulse can be blocked by an optical isolator that blocks backward-propagating light at or near the signal wavelength. At high enough power levels, the SBS pulse can also induce backward-propagating light at wavelengths tens to hundreds of nanometers away from the signal wavelength. This SBS-Pulse Induced Non-linear Spectrum light is outside the isolator's reject band, so it can propagate upstream and de-stabilize the upstream amplifier stages.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: August 9, 2022
    Assignee: Massachusetts Institute of Technology
    Inventors: Andrew Benedick, Kevin Creedon, John J. Zayhowski
  • Patent number: 11387622
    Abstract: A fiber laser system based in solitonic passive mode-locking, including a laser diode to emit and deliver an optical signal of a first wavelength; a single-fiber laser cavity including a dichroic mirror, a SESAM and a polarization maintaining highly-doped active fiber, to receive the emitted signal and to emit a pulsed optical signal of a second wavelength, generating laser light in the form of mode-locked ultrashort pulses; a unit coupling the laser diode to the single-fiber laser cavity; and an isolator device protecting the cavity from back reflections. The solitonic mode-locked ultrashort pulses are comprised in a range of 100 fs<10 ps with repetition rates of hundreds MHz to tens of GHz.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: July 12, 2022
    Assignee: FYLA LASER, S. L.
    Inventors: Pere Pérez Millán, Javier Abreu Afonso, Salvador Torres Peiró, Viorel Otgon, Héctor Muñoz Marco
  • Patent number: 11307350
    Abstract: The single mode optical fiber disclosed herein has a core, an inner cladding, a trench and an outer cladding, along with a non-glass protective coating. The refractive index profile of the optical fiber is such that the optical fiber has relatively low bend loss at both small and large bend diameters. The relative refractive indices of the inner cladding, trench and outer cladding are such that a tunneling point that arises during bending is pushed out beyond the trench and thus sufficiently far away from the core so that bending losses for both small and large radius bends are relatively small.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: April 19, 2022
    Assignee: Corning Incorporated
    Inventors: Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon
  • Patent number: 11303091
    Abstract: A pulsed light generation device, includes: a first optical fiber through which first pulsed light and second pulsed light, having an intensity that decreases while an intensity of the first pulsed light increases, and increases while the intensity of the first pulsed light decreases, having been multiplexed and entered therein, are propagated; and a second optical fiber at which the first pulsed light, having exited the first optical fiber and entered therein, is amplified while being propagated therein, wherein: at the first optical fiber, phase modulation occurs in the first pulsed light due to cross phase modulation caused by the second pulsed light; and self-phase modulation occurring in the first pulsed light at the second optical fiber is diminished by the phase modulation having occurred at the first optical fiber.
    Type: Grant
    Filed: January 3, 2020
    Date of Patent: April 12, 2022
    Assignee: NIKON CORPORATION
    Inventor: Akira Tokuhisa
  • Patent number: 11276982
    Abstract: A doped fiber amplifier is proposed that includes both a Ho-doped amplifier (used as a preamplifier) and a Tm-doped amplifier (used as a power amplifier). The Ho-doped preamplifier typically uses a single clad (SC) optical fiber as the gain element, with both the propagating signal and pump beam introduced into the Ho-doped core of the SC fiber. The Tm-doped power amplifier typically utilizes a double clad (DC) optical fiber as the gain element, which allows for a multimode pump to propagate within the Tm-doped core region and inner cladding, providing efficient high power amplification of the signal received at its input.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: March 15, 2022
    Assignee: Cybel, LLC.
    Inventors: Jean-Marc Delavaux, Robert E. Tench, Clement Romano
  • Patent number: 11217961
    Abstract: Embodiments relate to a noise suppressor for suppressing noise of an optical signal, including a core through which the optical signal travels, a clad that is wrapped around the core and configured to expose part of the core, and a graphene layer formed on the part of the core, and a digital optical signal generation system including the same.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: January 4, 2022
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Yong-Won Song, Sungjae Lee
  • Patent number: 11217958
    Abstract: A semiconductor laser diode light source package includes: a seed light source for outputting signal beams; a pump beam source for outputting pump beams; and at least one mirror for transmitting the signal beams to a core of an output optical fiber and transmitting the pump beams to first cladding of the output optical fiber, wherein the seed light source, the pump beam source, and the at least one mirror are realized in a semiconductor chip, and the output optical fiber is connected to an end terminal of the semiconductor laser diode light source package.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: January 4, 2022
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hong-Seok Seo, Bongki Mheen, Gyu Dong Choi
  • Patent number: 11183812
    Abstract: A tunable source includes a short-cavity laser optimized for performance and reliability in SSOCT imaging systems, spectroscopic detection systems, and other types of detection and sensing systems. The short cavity laser has a large free spectral range cavity, fast tuning response and single transverse, longitudinal and polarization mode operation, and includes embodiments for fast and wide tuning, and optimized spectral shaping. Disclosed are both electrical and optical pumping in a MEMS-VCSEL geometry with mirror and gain regions optimized for wide tuning, high output power, and a variety of preferred wavelength ranges; and a semiconductor optical amplifier, combined with the short-cavity laser to produce high-power, spectrally shaped operation. Several preferred imaging and detection systems make use of this tunable source for optimized operation are also disclosed.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: November 23, 2021
    Assignees: Thorlabs, Inc., Praevium Research, Inc.
    Inventors: Alex Ezra Cable, Vijaysekhar Jayaraman, Benjamin Michael Potsaid
  • Patent number: 11156848
    Abstract: In various embodiments, optical repositioners and/or angled dispersive elements are utilized to manipulate portions of an input laser beam emitted by a group of laser emitters in order to form a multi-wavelength output beam having a high beam quality factor.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: October 26, 2021
    Assignee: TERADIODE, INC.
    Inventors: Parviz Tayebati, Wang-Long Zhou, Bien Chann, Robin Huang, Michael Cruz
  • Patent number: 11158990
    Abstract: The present disclosure relates to optical fiber amplifying systems having operability at a wide variety of ambient temperatures and to methods for using them. One aspect of the disclosure is an optical fiber system configured to provide amplified radiation. The system includes an active optical fiber; a plurality of grating-locked pump sources, each having an output optically coupled to the active optical fiber; one or more temperature sensors, configured to measure a temperature associated with one or more of the grating-locked pump sources; and a control system configured to accept measurements from the one or more temperature sensors and, for a desired total pump power output, to provide to one or more of the grating-locked pump sources a set of drive currents suitable to provide the desired total pump power output.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: October 26, 2021
    Assignee: Nufern
    Inventor: Daniel J. Creeden
  • Patent number: 11126018
    Abstract: Embodiments include apparatuses, methods, and systems including a dynamic polarization controller (DPC) to receive a first light beam and a second light beam, to adjust a rotation of a state of polarization (SOP) of the first light beam and the second light beam to generate a third light beam and a fourth light beam, under the control of a first control signal, a second control signal, and a third control signal. The first control signal may be related to a phase difference between the third light beam and the fourth light beam, the second control signal may be related to an intensity difference between the third light beam and the fourth light beam, and the third control signal may be related to a rotation of a SOP of the third light beam and the fourth light beam. Other embodiments may also be described and claimed.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: September 21, 2021
    Assignee: INTEL CORPORATION
    Inventors: Taehwan Kim, Ganesh Balamurugan, Hao Li, Hasitha Jayatilleka
  • Patent number: 11112614
    Abstract: A light-emitting device improves the beam quality of emission light from a single emitter light source in the slow-axis direction, and includes a light source 10 having a single emitter and a beam shaping module that splits the emission light from the light source into to a plurality of split-lights in the slow-axis direction, and shapes the split-lights as a shaped-beam arrayed in the fast-axis direction, and outputs the shaped-beam.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: September 7, 2021
    Assignee: SHIMADZU CORPORATION
    Inventors: Akiyuki Kadoya, Ichiro Fukushi, Koji Tojo
  • Patent number: 11106046
    Abstract: Beam combining optical systems include a fiber beam combiner having multiple inputs to which output fibers of laser diode sources are spliced. Cladding light stripping regions are situated at the splices, and include exposed portions of fiber claddings that are at least partially encapsulated with an optical adhesive or a polymer. A beam combiner fiber that is optically downstream of a laser source has an exposed cladding secured to a thermally conductive support with a polymer or other material that is index matched to the exposed cladding. This construction permits attenuation of cladding light propagating toward a beam combiner from a splice.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: August 31, 2021
    Assignee: nLIGHT, Inc.
    Inventors: Chris A. Rivera, Dahv A. V. Kliner, Joseph Emery
  • Patent number: 11067872
    Abstract: A doubly resonant optical parametric oscillator (1) includes a fan-out crystal (5, 55, 105) having an optical non-linearity of order 2 and placed in an optical cavity (6) able to reflect a pump (2). The crystal (5, 55, 105) has an entrance face (59) and an exit face (60), through which faces the optical axis passes, an upper face (57) and a lower face (58).
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: July 20, 2021
    Assignee: BLUE INDUSTRY AND SCIENCE
    Inventors: Johann Georges Des Aulnois, Benjamin Szymanski
  • Patent number: 11048042
    Abstract: A photonic integrated circuit may include a substrate and an optical waveguide integrated with the substrate. The optical waveguide may include a bend section, wherein a bend shape of the bend section is defined by a curvature function to suppress waveguide mode conversion.
    Type: Grant
    Filed: December 30, 2019
    Date of Patent: June 29, 2021
    Assignee: Lumentum Operations LLC
    Inventors: Shibnath Pathak, Konstantin Petrovich Petrov, Brian Daniel, Hossein Hodaei, Michael C. Larson, Amit Mizrahi
  • Patent number: 11043786
    Abstract: Aspects of the present disclosure describe systems, methods, and structures that advantageously amplify optical signals through the effect of optical pump signals generated by a multicore laser diode and multicore rare-earth doped optical fiber in optical communication with a 3D waveguide structure and a multicore input signal fiber providing a plurality of optical signals for amplification.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: June 22, 2021
    Inventors: Fatih Yaman, Shaoliang Zhang, Eduardo Mateo Rodriguez, Kohei Nakamura, Yoshihisa Inada, Takanori Inoue
  • Patent number: 11043785
    Abstract: Methods for synthesizing fibers having nanoparticles therein are provided, as well as preforms and fibers incorporating nanoparticles. The nanoparticles may include one or more rare earth ions selected based on fluorescence at eye-safer wavelengths, surrounded by a low-phonon energy host. Nanoparticles that are not doped with rare earth ions may also be included as a co-dopant to help increase solubility of nanoparticles doped with rare earth ions in the silica matrix. The nanoparticles may be incorporated into a preform, which is then drawn to form fiber. The fibers may beneficially be incorporated into lasers and amplifiers that operate at eye safer wavelengths. Lasers and amplifiers incorporating the fibers may also beneficially exhibit reduced Stimulated Brillouin Scattering.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: June 22, 2021
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Colin C. Baker, Edward J. Friebele, Woohong Kim, L. Brandon Shaw, Jasbinder S. Sanghera
  • Patent number: 11038596
    Abstract: Consistent with the present disclosure, codewords indicative of a super Gaussian distribution may be encoded and decoded using the encoders and decoders disclosed herein. Based on such codewords, symbols may be transmitted in accordance or in conformance with a super Gaussian distribution to tailor the SE of an optical signal or subcarrier for a given link having non-linear degradations and shaping gain. Such tailed SE may not be achievable with a Gaussian symbol transmission probability distribution.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: June 15, 2021
    Assignee: Infinera Corporation
    Inventor: Mohsen N. Tehrani
  • Patent number: 11035720
    Abstract: A warning device for preventing underground cables against accidental excavation comprises an optical fiber vibration sensor having a mode recognition function, a signal processing unit, a wireless communication unit and a power supply unit, wherein the signal processing unit is connected to the optical fiber vibration sensor, the wireless communication unit and the power supply unit, and the optical fiber vibration sensor is installed within a set range of a cable and is used to monitor vibration signals around the cable, so that once a behavior possibly endangering the cable occurs, an alarm is given out in time to reduce power transmission and transformation accidents. Compared with the prior art, the warning device has the advantages of low false alarm rate, rapid response and accurate localization region.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: June 15, 2021
    Assignee: STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER COMPANY
    Inventors: Lijun Zhou, Yunjie Zhou, Xiaojuan Jiang, Hong Min, Tiecheng Lou, Jinhua Yu, Jia Chen, Kaibo Ma, Dekang Wen, Ting Ye, Qinqin Han, Ran An, Tianyu Yang, Chenyang Xuan, Yin Zhou, Chenbin Wu
  • Patent number: 11029476
    Abstract: Examples herein relate to optical systems. In particular, implementations herein relate to an optical system including an optical transmitter configured to transmit optical signals. The optical transmitter includes a first optical source configured to emit light having different wavelengths, a waveguide, and an optical coupler configured to couple the emitted light from the first optical source to the waveguide. The optical transmitter further includes an array of two or more second optical sources coupled to the waveguide, each of the two or more second optical sources configured to be injection locked to a different respective wavelength of the emitted light transmitted via the waveguide from the first optical source. In some implementations, the first optical source is a master comb laser and the two or more second optical sources are slave ring lasers.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: June 8, 2021
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Di Liang, Zhixin Liu
  • Patent number: 10985519
    Abstract: A laser system based on nonlinear pulse compression and a LMA optical fiber therefor are provided. The LMA optical fiber is configured to amplify seed light pulses and promote the onset of nonlinear spectral broadening. The LMA optical fiber includes a first section having constant core and cladding diameters and receiving and supporting propagation of the light pulses in multiple transversal modes. The first section is configured to suppress high order modes propagating therealong. The LMA optical fiber further includes a tapered second section receiving the fundamental mode from the first section, the core and cladding diameters increasing gradually along said second section so as to provide an adiabatic transition of the fundamental mode. The LMA optical fiber further includes an optional third section having constant core and cladding diameters. Dispersive compression of the light pulses outputted by the LMA optical fiber provides excellent beam quality and high peak powers.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: April 20, 2021
    Assignee: Institut National D'Optique
    Inventors: Vincent Roy, Claude Paré, Louis Desbiens
  • Patent number: 10903087
    Abstract: A laser processing method for processing a substrate having a device formed on the front side, an electrode pad being formed on the device. The method includes applying a pulsed laser beam to the back side of the substrate at a position corresponding to the electrode pad, thereby forming a fine hole in the substrate so that the fine hole reaches the electrode pad, detecting first plasma light generated from the substrate by the application of the pulsed laser beam to the substrate and also detecting second plasma light generated from the electrode pad by the application of the pulsed laser beam to the electrode pad, and stopping the laser beam when the second plasma light is detected. Time intervals of the pulsed laser beam repeatedly applied to the same fine hole are set to 0.1 ms or more.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: January 26, 2021
    Assignee: DISCO CORPORATION
    Inventor: Hiroshi Morikazu
  • Patent number: 10879666
    Abstract: The present invention comprises a core (11) and a primary coating (12) that is lower in refractive index than the core (11) and that covers the side surface of the core (11) except in a coating-removed section (I0). The side surface of the core (11), in at least part of the coating-removed section (I0), is covered with an intermediate-refractive-index resin part (14) that is lower in refractive index than the core (11) and that is higher in refractive index than the primary coating (12).
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: December 29, 2020
    Assignee: FUJIKURA LTD.
    Inventor: Ryokichi Matsumoto
  • 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
    Assignee: MPB COMMUNICATIONS INC.
    Inventors: Alaa Al-Kadry, Vladimir Karpov, Wallace Raymond Lovett Clements