Optical Fiber Patents (Class 359/341.1)
  • Patent number: 11114811
    Abstract: An object is to improve the efficiency of amplification by rare earth ion while maintaining beam quality of output light in a multi-mode fiber doped with rare earth ion. A multi-mode fiber (11) that includes a rare-earth-ion-doped core and that has a normalized frequency of not less than 2.40 includes a filter portion (111) that is formed by bending a partial section of or entirety of the multi-mode fiber (11), the filter portion (111) having a smallest diameter (diameter R1) that is set so that (1) only LP01, LP11, LP21, and LP02 modes propagate or only LP01 and LP11 modes propagate and (2) a loss of a highest-order one of the modes that propagate is not more than 0.1 dB/m.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: September 7, 2021
    Assignee: FUJIKURA LTD.
    Inventor: Masakuni Mimuro
  • Patent number: 11108207
    Abstract: Disclosed is a laser system including a source, for generating a source signal, and an optical amplifier system. The laser system includes a pulse selection or variation device configured to select or vary the source signal so as to form a main signal composed of one or more light pulses. The main signal is temporally variable in terms of rhythm and/or amplitude. The laser system is configured to inject the main signal and a secondary signal into the optical amplifier system. The secondary signal is varied on the basis of the temporal variation in terms of rhythm and/or amplitude of the main signal so as to stabilize the power stored in the optical amplifier system in a time-dependent manner, and the laser system is configured to spatially separate the amplified main signal from the amplified secondary signal.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: August 31, 2021
    Assignee: AMPLITUDE SYSTEMES
    Inventors: Clemens Honninger, Franck Morin, Martin Delaigue
  • Patent number: 11105976
    Abstract: A terahertz (THz) waveguide and method for production allows for THz waveguides to be used in or on a printed circuit board (PCB) such that the propagation of THz waves require less power, result in less signal loss due to radiation or dispersion, and propagate more efficiently. Additionally, the position and/or geometry of a waveguide, as well as any additional antenna or coupling element, may be adjusted on or in the PCB such that the electromagnetic field of the waveguide may more efficiently couple with the electromagnetic field of the PCB.
    Type: Grant
    Filed: April 8, 2020
    Date of Patent: August 31, 2021
    Assignee: Corning Incorporated
    Inventors: Lars Martin Otfried Brusberg, Alan Frank Evans, Michael John Yadlowsky
  • Patent number: 11101621
    Abstract: A semiconductor laser source including a Mach-Zehnder interferometer including first and second arms. Each of these arms being divided into a plurality of consecutive sections. The first and second arms each include a gain-generating section forming first and second gain-generating waveguides, respectively. The laser source includes power sources able to deliver currents through the gain-generating waveguides such that the following condition is met: ? n = 1 N 2 ? L 2 , n ? neff 2 , n - ? n = 1 N 1 ? L 1 , n ? neff 1 , n = k f ? ? Si where: kf is a preset integer number higher than or equal to 1, N1 and N2 are the numbers of sections in the first and second arms, respectively, L1,n and L2,n are the lengths of the nth sections of the first and second arms, respectively, neff1,n and neff2,n are the effective indices of the nth sections of the first and second arms, respectively.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: August 24, 2021
    Assignee: Commissariat A L'Energie Atomique et aux Energies Alternatives
    Inventors: Quentin Wilmart, Karim Hassan
  • Patent number: 11031746
    Abstract: A semiconductor laser module includes a semiconductor laser device that outputs laser light; an optical fiber that includes a core portion and a cladding portion formed at an outer periphery of the core portion and that receives the laser light from one end and guides the laser light to the outside of the semiconductor laser module; an optical part disposed at an outer periphery of the optical fiber, having optical transmittance at a wavelength of the laser light, and that fixes the optical fiber; a first fixative that fixes the optical part and the optical fiber; and a housing that accommodates the semiconductor laser device and the one end of the optical fiber that receives the laser light, wherein an optical reflection reducing region treated to absorb the laser light and having a rough surface is formed around the optical part.
    Type: Grant
    Filed: August 13, 2019
    Date of Patent: June 8, 2021
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yuta Ishige, Maiko Ariga, Masaki Iwama
  • Patent number: 11005229
    Abstract: An all solid-state laser light source device comprises a diode-pump laser and the following devices sequentially arranged in an optical path direction of laser light: a coupling optical fiber, a coupling lens assembly, and a resonant cavity. An anisotropic laser crystal is provided in the resonant cavity. Absorption spectra of the anisotropic laser crystal comprise a ? polarization absorption spectrum and a ? polarization absorption spectrum. Each of the ? polarization absorption spectrum and the ? polarization absorption spectrum has a peak pump region and a left pump region and a right pump region arranged on either side of the peak pump region. Pump light outputted by diode-pump laser has a wavelength ? falling within the left pump region or the right pump region.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: May 11, 2021
    Assignee: HAN'S LASER TECHNOLOGY INDUSTRY GROUP CO., LTD.
    Inventors: Encai Ji, Qitao Lv, Yunfeng Gao
  • Patent number: 10993003
    Abstract: This disclosure describes devices related to multiplexing optical data signals. A system may be disclosed for multiplexing one or more optical data signals. The system may comprise a forty channel dense wave division multiplexer (DWDM) configured combine one or more optical data signals. The system may comprise a booster optical amplifier configured to amplify the combined one or more optical data signals and output a first amplified optical data signal. The system may comprise a variable optical amplifier (VOA) communicatively configured to receive the amplified first optical data signal, adjust the power of the amplified first optical data signal to a first level, and output a second optical data signal. The system may comprise a WDM communicatively coupled to the VOA, the WDM configured to output a combined second optical data signal and one or more third signals to a primary fiber.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: April 27, 2021
    Assignee: Cox Communications, Inc.
    Inventor: Harjinder S. Ghuman
  • Patent number: 10951000
    Abstract: A single mode (SM) high power laser system is configured with a laser source outputting a single mode or low mode kW-power light and a passive delivery fiber spliced to an output fiber of the fiber laser source and having a double bottleneck-shaped core. The latter is configured to increase a threshold for nonlinear effects in general and in particular for stimulated Raman scattering (SRS) so that the delivery passive fiber has a fiber length at least twice the length of a delivery passive fiber with a standard uniformly dimensioned core, which may be used with the same laser source, while outputting the kW-power light with an M2 factor less than 2.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: March 16, 2021
    Assignee: IPG PHOTONICS CORPORATION
    Inventors: Anton Ferin, Valentin Fomin, Andrey Abramov
  • Patent number: 10845541
    Abstract: A cladding mode light removal structure includes: an input-side exposure portion where a covering is removed from an end of an input-side optical fiber to expose a cladding of the input-side optical fiber; an output-side exposure portion where a covering is removed from an end of an output-side optical fiber to expose an output-side cladding of the output-side optical fiber; a fusion splice portion at which the input-side exposure portion and the output-side exposure portion are connected by fusion splice; a fiber housing portion having an accommodation space that receives the input-side exposure portion, the output-side exposure portion, and the fusion splice portion; a high refractive index resin having a refractive index equal to or higher than that of the cladding exposed at the input-side exposure portion; and a low refractive index portion of a medium.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: November 24, 2020
    Assignee: Fujikura Ltd.
    Inventors: Kenji Kuniyasu, Ryokichi Matsumoto
  • Patent number: 10811837
    Abstract: A fiber amplifier system including an optical source providing an optical seed beam and an FM electro-optic modulator (EOM) that frequency modulates the seed beam to broaden its spectral linewidth. The system also includes an AM EOM that modulates the seed beam to provide an amplitude modulated seed beam that is synchronized with the frequency modulated seed beam. The system also includes a non-linear fiber amplifier receiving the AM and FM modulated seed beam, wherein the amplitude modulated seed beam causes self-phase modulation in the fiber amplifier that phase modulates the seed beam as it is being amplified by the fiber amplifier that acts to cancel the spectral linewidth broadening caused by the frequency modulation.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: October 20, 2020
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: Gregory D. Goodno
  • Patent number: 10807190
    Abstract: An apparatus and its use for laser processing along with a method and an optical component. A first laser device provides a first optical feed fiber and a second laser device provides a second optical feed fiber. A beam combining means connected to the first and second feed fibers and to a multi-core optical fiber is adapted to form a composite laser beam by having the first optical feed fiber aligned with a first core of the multi-core optical fiber and the second optical feed fiber aligned with at least one second core of the multi-core optical fiber. The first and second cores outputs a composite laser beam to a workpiece to be processed. A control unit individually controls the power density of the output laser beams.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: October 20, 2020
    Assignee: Corelase Oy
    Inventors: Arto Salokatve, Jarno Kangastupa, Tiina Amberla, Tuomo Konnunaho
  • Patent number: 10768433
    Abstract: An apparatus includes a laser system that includes a first fiber having an output end and situated to propagate a first laser beam with a first beam parameter product (bpp) and a second fiber having an input end spliced to the output end of the first fiber at a fiber splice so as to receive the first laser beam and to form a second laser beam having a second bpp that is greater than the first bpp, wherein the output end of the first fiber and the input end of the second fiber are spliced at a tilt angle so as to increase the first bpp to the second bpp.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: September 8, 2020
    Assignee: nLIGHT, Inc.
    Inventors: David Logan, Ryan Hawke, David R. Balsley, Ron Stevens
  • Patent number: 10666010
    Abstract: A pump reflector for efficiently recycling unabsorbed pump radiation in a diode-pumped fiber laser includes a core for guiding a laser beam, a pump cladding, and a tapered capillary tube. Pump radiation is adiabatically guided in the tapered capillary tube, which includes a mirror that is reflective for the pump radiation. The pump reflector may be packaged as a fiber component for co-propagating or counter-propagating fiber laser amplifiers and resonators.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: May 26, 2020
    Assignee: Corelase Oy
    Inventors: Jari Näppi, Arto Salokatve
  • Patent number: 10634842
    Abstract: A multi-clad optical fiber design is described in order to provide low optical loss, a high numerical aperture (NA), and high optical gain for the fundamental propagating mode, the linearly polarized (LP) 01 mode in the UV and visible portion of the optical spectrum. The optical fiber design may contain dopants in order to simultaneously increase the optical gain in the core region while avoiding additional losses during the fiber fabrication process. The optical fiber design may incorporate rare-earth dopants for efficient lasing. Additionally, the modal characteristics of the propagating modes in the optical core promote highly efficient nonlinear mixing, providing for a high beam quality (M2<1.5) output of the emitted light.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: April 28, 2020
    Assignee: Nuburu, Inc.
    Inventors: Mark S. Zediker, Robert A. Stegeman, James P. Tucker, Jean-Philippe Feve
  • Patent number: 10554298
    Abstract: The present disclosure relates to a method for testing a fiber optic network including a fiber distribution hub. The method includes providing a test splitter within the fiber distribution hub to provide optical connectivity between an F1 fiber and at least a portion of an F2 fiber network. The method also includes testing sending a test signal from the F1 fiber through the test splitter to the F2 fiber network, and replacing the test splitter after testing has been completed.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: February 4, 2020
    Assignee: CommScope Technologies LLC
    Inventor: Trevor D. Smith
  • Patent number: 10528195
    Abstract: Disclosed is a touch device including a display to display a screen image, and a radar system under the display to detect a touch.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: January 7, 2020
    Assignee: LG Innotek Co., Ltd.
    Inventors: Tae Jin Lee, Sang Young Lee
  • Patent number: 10511401
    Abstract: An apparatus includes a first reconfigurable optical add/drop multiplexer (ROADM) to receive a first optical signal and a second ROADM to receive a second optical signal. The apparatus also includes a reconfigurable optical switch that includes a first switch, switchable between a first state and a second state, to transmit the first optical signal at the first state and block the first optical signal at the second state. The reconfigurable optical switch also includes a second switch, switchable between the first state and the second state, to transmit the second optical signal at the first state and block the second optical signal at the second state. The reconfigurable optical switch also includes an output port to transmit an output signal that is a sum of possible optical signals transmitted through the first switch and the second switch.
    Type: Grant
    Filed: September 30, 2017
    Date of Patent: December 17, 2019
    Assignee: Juniper Networks, Inc.
    Inventor: Kevan Peter Jones
  • Patent number: 10447002
    Abstract: A monomode optical fiber, and a process for manufacturing such a fiber, that comprises a monomode core and at least one cladding encircling the core. The monomode core comprises at least two zones, a first zone with at least one first refractive index and a second zone with at least one second refractive index different from the first refractive index. The difference between the first refractive index and the second refractive index is of the same order of magnitude as the variation in the refractive index of the second zone between the inactive state and the active state of the fiber.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: October 15, 2019
    Assignees: Universite de Limoges, Centre National de la Recherche Scientifique
    Inventors: Philippe Roy, Romain Dauliat, Raphael Emmanuel Jamier
  • Patent number: 10340655
    Abstract: The invention relates to an optical waveguide (3) as a laser medium or as a gain medium for high-power operation, wherein the optical waveguide (3) is an optical fiber, the light-guiding core of which, at least in sections, is doped with rare earth ions. It is an object of the invention to provide an optical waveguide as a laser or a gain medium, and a laser/amplifier combination realized therewith, in which the output signal of the laser or gain medium is better stabilized. The invention achieves this object by virtue of the maximum small signal gain of the optical waveguide (1) being up to 60 dB, preferably up to 50 dB, more preferably up to 40 dB, even more preferably up to 30 dB, on account of the concentration of the rare earth ions and/or the distribution thereof in the light-guiding core. Moreover, the invention relates to the use of such an optical waveguide as an amplifier fiber (3) in a laser/amplifier combination.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: July 2, 2019
    Assignees: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V., FRIEDRICH-SCHILLER-UNIVERSITÄT
    Inventors: Hans Jurgen Otto, Cesar Jauregui Misas, Jens Limpert, Andreas Tunnermann
  • Patent number: 10333615
    Abstract: An optoelectronic module management system includes a network connection communicatively coupled to an optoelectronic module, a memory, and a processing device operatively coupled to the memory. The processing device is configured to perform or control performance of operations that include identify the optoelectronic module via a management network. The optoelectronic module includes a management communication element that is communicatively coupled to the management network and an optical communication element that is communicatively coupled to a fiber optic cable. The operations further include add the optoelectronic module to a list of monitored devices, monitor the optoelectronic module, provide a service to the optoelectronic module in response to the monitoring, and generate a report of the service provided to the optoelectronic module.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: June 25, 2019
    Assignee: FINISAR CORPORATION
    Inventors: Giuliano Coli, Rafik Ward
  • Patent number: 10333269
    Abstract: A laser system includes a master oscillator, which emits a train of optical seed pulses with variable intervals between the pulses. An optical power amplifier includes an optical gain medium, which receives and amplifies the optical seed pulses from the master oscillator, and a pump, which applies pump radiation to the optical gain medium. A pulse generator applies a control input to the master oscillator, which causes the intervals between the optical seed pulses to vary by at least 50% at a rate of change that is greater than a response frequency of the optical gain medium. A control unit drives the pump responsively to predicted intervals between the optical seed pulses, at a variable pump power selected so that the pulse amplitudes of the output pulses vary by no more than 20% irrespective of the varying intervals between the optical seed pulses.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: June 25, 2019
    Assignee: APPLE INC.
    Inventors: Ido Luft, Andrew J. Sutton, Ronen Akerman
  • Patent number: 10302873
    Abstract: A bridge adapter that includes a first end and a second end. The bridge adapter further including a first ferrule connection on the first end and a second ferrule connection on the second end. The bridge adapter also including an optical path optically connecting the first ferrule connection and the second ferrule connection. Also, a method of connection optical cable having multiple pitches, the method including connecting a first optical cable having a first fiber pitch to a bridge adapter and connection having a second fiber pitch to the bridge adapter. The method further including directing an optical signal through the first optical cable, the bridge adapter, and the second optical cable, wherein the directing includes sending the optical signal through an optical wave bridge in the bridge adapter and having the first fiber pitch on a first end and the second fiber pitch on the second end.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: May 28, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Kevin Leigh, John Norton, Sagi Mathai
  • Patent number: 10281647
    Abstract: The invention relates to an optical waveguide with at least one core region (1) extending along the longitudinal extent of the optical waveguide, and with a first jacket (2) which, viewed in the cross section of the optical waveguide, surrounds the core region (1). The invention further relates to an optical arrangement with such an optical waveguide, and to a method for producing the optical waveguide. The object of the invention is to make available an optical waveguide for high-performance operation, which is improved in relation to the prior art in terms of mode instability. The invention achieves this object by virtue of the fact that the optical waveguide consists of crystalline material at least in the core region (1).
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: May 7, 2019
    Assignees: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V., Friedrich-Schiller-Universitat Jena
    Inventors: Cesar Jauregui Misas, Andreas Tunnermann, Jens Limpert, Christian Gaida
  • Patent number: 10277000
    Abstract: A novel broadband light source composed of supercontinuum light source and high-power single-wavelength semiconductor laser diodes. It includes an electronics control board, a supercontinuum light source, and a series of single-wavelength semiconductor laser diodes. The frequency of each single-wavelength semiconductor laser diodes is adjusted to integer times or division times of a frequency of the supercontinuum light source by using the electronics control board. Weaknesses of the supercontinuum light source that it is difficult to cover a wavelength less than 400 nm and power density at a wavelength of 400-2400 nm is less than 10 mW/nm are compensated by using the single-wavelength semiconductor lasers.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: April 30, 2019
    Assignee: WUHAN YANGTZE SOTON LASER CO. LTD.
    Inventors: Weijia Yang, Kangkang Chen
  • Patent number: 10239749
    Abstract: An electrical cross-point switch N inputs, each at least 10 Gbps, connected to input transmission lines; M outputs, each at least 10 Gbps, connected to output transmission lines; at least two Radio Frequency (RF) Microelectromechanical systems (MEMS) switches selectively interconnecting each input transmission line and each output transmission line; and control and addressing circuitry configured to selectively control interconnection of each input transmission line and each output transmission line via the at least two RF MEMS switches. The at least two RF MEMS switches can be embedded in each input transmission line and each output transmission line. The input transmission lines and the output transmission lines can each be partially shielded microwave transmission lines.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: March 26, 2019
    Assignee: Ciena Corporation
    Inventors: Michael Y. Frankel, John P. Mateosky
  • Patent number: 10235307
    Abstract: An optical transceiver that shortens an elapsed time for loading data from an external device, and a method of loading data are disclosed. The optical transceiver includes an inner memory, a central processing unit (CPU), and a serial communication line connecting the CPU with the external device. The CPU actively loads data stored in the external device into the inner memory through the serial communication line by operating as a master device in the serial communication line.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: March 19, 2019
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Hiromi Tanaka, Ryutaro Futami
  • Patent number: 10203265
    Abstract: An optical characteristic of a coupled multi-core optical fiber is evaluated without core alignment, one of plural cores thereof being arranged as a center core at the center of a cladding thereof, a total number of spatial modes being a number of the cores or greater, (a fiber length)×(a power coupling coefficient between the cores) being 10 or greater. The coupled multi-core optical fiber is joined to a dummy fiber, having a core at the center of a cladding having the same shape and dimension as those of the coupled multi-core optical fiber, by causing one ends of the fibers to face each other and aligning the fibers with reference to the circumferences of the fibers. Light is launched to the coupled multi-core optical fiber joined to the dummy fiber, and a light measurement unit measures the light passing through the fibers.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: February 12, 2019
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Tetsuya Hayashi
  • Patent number: 10135219
    Abstract: A device may include a transient optical amplifier having stored energy associated with a lower boundary and an upper boundary of a dynamic equilibrium, and a target level defining stored energy for amplifying a high energy input pulse to a higher energy output pulse. The device may include a pump to increase the amplifier's stored energy, and a source to pass low energy control pulses or the high energy input pulse to the amplifier. The device may include a controller configured to maintain the amplifier's stored energy in the dynamic equilibrium by requesting low energy control pulses for the amplifier at a high repetition frequency. The controller may wait to receive a trigger. Based on receiving the trigger, the device may stop passing low energy control pulses to the amplifier, and may pass the high energy input pulse to the amplifier when the amplifier's stored energy reaches the target level.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: November 20, 2018
    Assignee: Lumentum Operations LLC
    Inventors: Hubert Ammann, Marco Benetti
  • Patent number: 10101467
    Abstract: This invention relates to a sensor device consisting of long period gratings made of rare-earth doped double clad fiber, which is written by CO2 laser irradiation while the fiber is held static, for gamma dose measurement in the range of 150 Gy-2.5 kGy, extendable to 20 kGy, which measurements are real-time and can be from remote locations. The sensor device has high wavelength dip shift sensitivity of at least 2.8 nm/kGy, and its radiation-induced changes are near permanent. The gratings demonstrate negligible temperature sensitivity and the shifts recorded show negligible annealing at room temperature.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: October 16, 2018
    Assignee: SECRETARY, DEPARTMENT OF ATOMIC ENERGY, GOVERNMENT OF INDIA
    Inventors: Sanjay Kher, Smita Chaubey, Jai Kishore, Srikant M. Oak
  • Patent number: 10036850
    Abstract: This disclosure relates to polarizing optical fibers and polarization maintaining optical fibers, including active and/or passive implementations. An embodiment includes a polarizing (PZ) optical fiber that includes stress applying parts (SAPs) disposed in a first cladding region, the SAPs comprising a material with a thermal expansion coefficient, ?SAP. A core region is at least partially surrounded by cladding features and the SAPs. The core includes glass with a thermal expansion coefficient, ?core. The arrangement of the SAPs satisfies: Rsc=dSAP/Dsc, where Dsc is the SAP center to core center distance, and dSAP is the average SAP diameter, and d?=|?SAP??core|, and where Rsc and d? may be sufficiently large to induce stress birefringence into the core and to provide for polarized output. Active fibers in which a portion of the fiber is doped may be implemented for application in fiber lasers, fiber amplifiers, and/or optical pulse compressors.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: July 31, 2018
    Assignee: IMRA America, Inc.
    Inventors: Shigeru Suzuki, Hugh A. McKay, Martin E. Fermann
  • Patent number: 10033515
    Abstract: Systems and Methods for RF Energy Multiplexers are provided. In one embodiment, a multiplexer comprises: a multiplexer stage that includes: a first three port device coupled to a first port of the multiplexer and a first reflective filter, wherein the first reflective filter has a pass band that passes energy at a first frequency, and reflects energy at at least one of a second frequency outside of the pass band back into the first three port device; and a first filtered-load sub-stage coupled to the first three port device, the sub-stage comprising a second three port device coupled to a second reflective filter and a first absorbing load, where the second reflective filter passes energy at the first frequency to the first absorbing load and reflects energy at the at least one of a second frequency outside of the first pass band back into the second three port device.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: July 24, 2018
    Assignee: Honeywell International Inc.
    Inventor: Adam M. Kroening
  • Patent number: 10014658
    Abstract: Described herein are photonic integrated circuits (PICs) comprising a semiconductor optical amplifier (SOA) to output a signal comprising a plurality of wavelengths, a sensor to detect data associated with a power value of each wavelength of the output signal of the SOA, a filter to filter power values of one or more of the wavelengths of the output signal of the SOA, and control circuitry to control the filter to reduce a difference between a pre-determined power value of each filtered wavelength of the output signal of the SOA and the detected power value of each filtered wavelength of the output signal of the SOA.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: July 3, 2018
    Assignee: Aurrion, Inc.
    Inventors: Erik Johan Norberg, John M. Garcia, Brian Koch, Gregory Alan Fish
  • Patent number: 9971094
    Abstract: An optical module adapted to combine a first and a second light beam into a mixed light beam is provided. The optical module includes a base, an optoelectronic element and an optical dichroic element. The base has an accommodating space. The optoelectronic element is adapted in the accommodating space. The optical dichroic element is adapted on the base. The optical dichroic element includes a transparent element, a first reflector and a second reflector. The transparent element is adapted to let the first light beam and the second light beam pass through. The first and second reflector are disposed on the transparent element. The first reflector is adapted to reflect the first light beam to the second reflector. The second reflector is adapted to reflect the first light beam and let the second light beam pass through. The first and the second reflector are opposite and not parallel to each other on the transparent element, and there is an angle between the first and the second reflector.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: May 15, 2018
    Assignee: ELASER TECHNOLOGIES CO., LTD.
    Inventors: Chu-Liang Cheng, Chi-Hua Wang
  • Patent number: 9967047
    Abstract: A method for transmitting digital data by a primary optical signal between a transmitter terminal and a receiver terminal, involves the following steps: determining a magnitude characterizing optical-wave degradation between the transmitter terminal and the receiver terminal, determining a number of transmission channels by a decreasing function of the magnitude characterizing optical-wave degradation, distributing the digital data over the transmission channels, modulating optical signals of different wavelengths using digital data distributed over the transmission channels, generating the primary optical signal by wavelength multiplexing of the optical signals, and sending a transmission configuration, including at least the number of transmission channels, from the transmitter terminal to the receiver terminal.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: May 8, 2018
    Assignee: THALES
    Inventors: Arnaud Le Kernec, Mathieu Dervin, Michel Sotom
  • Patent number: 9935708
    Abstract: A coherent optical spectrum analyzer for monitoring a spectrum of a fiber link is provided. The coherent optical spectrum analyzer comprises an input connectable to the fiber link, the input being connected to a first input of a coherent detector having at least two input, the first and a second input, and an output. The coherent optical spectrum analyzer further comprises a local oscillator having an output connected to the second input of the coherent detector, wherein the output of the coherent detector is connected to a first input of a processing unit, the processing unit also being connected to an input of the local oscillator, the processing unit being configured for analyzing information from the coherent detector. The local oscillator comprises a semiconductor laser tuned by temperature to a specific wavelength and swept by changing a bias current, the local oscillator being controlled by the processing unit.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: April 3, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Chantal Vilà, Gregori Azcarate, Robert Pous
  • Patent number: 9935419
    Abstract: In an optical fiber device having a configuration in which an optical fiber is joined to a side surface of another optical fiber, a joint portion is suppressed from reaching a high temperature. The optical fiber device includes a first fluoride fiber, a second fluoride fiber, and a heat dissipation member. The first fluoride fiber guides light. The second fluoride fiber has a first end on or from which light is incident or output and a second end at which an end surface of the second fluoride fiber is obliquely joined to a side surface of the first fluoride fiber.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: April 3, 2018
    Assignees: MITSUBOSHI DIAMOND INDUSTRIAL CO., LTD., OSAKA UNIVERSITY
    Inventors: Masanao Murakami, Christian Schaefer, Satoshi Hattori, Takahisa Hayashi, Seiji Shimizu, Shigeki Tokita
  • Patent number: 9927621
    Abstract: A method and apparatus for combining a plurality of laser beamlets to form a single annular beam using spectral beam combination. This invention includes a plurality of laser sources that emit a plurality of beamlets, wherein each one of the plurality of beamlets has a different wavelength; a beam annularizer that includes a plurality of optical units arranged to receive the beamlets, and configured to convert each beamlet into a respective annular beam that has an annular cross-sectional power profile; a beam-intersection transform element configured to point each respective one of the plurality of annular beams in an angular intersection arrangement toward a first location; and a spectral beam combiner at the first location configured to combine the plurality of wavelengths in the plurality of annular beams into a first annular spectrally combined beam.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: March 27, 2018
    Assignee: Lockheed Martin Corporation
    Inventors: Eric C. Honea, Yongdan Hu
  • Patent number: 9874666
    Abstract: An optical film, a display device including the same, and a method of manufacturing the optical film, the film including a first refractive index layer including a plurality of protrusions; a second refractive index layer covering the plurality of protrusions, the second refractive index layer having a refractive index that is different from a refractive index of the first refractive index layer; and a support layer on the first refractive index layer or the second refractive index layer, wherein a ratio of a height to a width of the protrusion is 0.5 or more.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: January 23, 2018
    Assignees: SAMSUNG DISPLAY CO., LTD., SEKONIX CO., LTD
    Inventors: Duk Jin Lee, Nam Seok Baik, Jang Seok Ma, Jung Hee Son, Gyeong-Im Lee, Jung Chul Seo, Seok Il Yoon, Chan Hee Lee
  • Patent number: 9868631
    Abstract: A Microelectromechanical systems (MEMS)-based N×M cross-point switch, a MEMS-based system, and a method provide MEMS-based cross-point electrical switching for a Layer 0 flow-based switch. The N×M cross-point switch includes N inputs each at least 10 Gbps, M output each at least 10 Gbps, a plurality of Radio Frequency (RF) MEMS switches selectively interconnecting the N inputs to the M outputs; and control and addressing circuitry to selectively control the plurality of RF MEMS switches to switch each of the N inputs to a corresponding output of the M outputs. The systems and methods provide an electrical switching fabric for flow-based switching of wavelengths that can be part of a Reconfigurable Electrical Add/Drop Multiplexer (READM) with similar functionality as a ROADM in the electronic domain.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: January 16, 2018
    Assignee: Ciena Corporation
    Inventors: Michael Y. Frankel, John P. Mateosky
  • Patent number: 9791618
    Abstract: A hollow-core waveguide structure for guiding an electromagnetic signal, comprising: a core material comprising a predetermined refractive index; and a cladding structure disposed about the core material, wherein the cladding structure has a refractive index that is less than unity; wherein the cladding structure comprises an Epsilon-near-zero (ENZ) metamaterial. The core material comprises air or the like. The cladding structure comprises one of substantially planar sheets disposed about the core material and a substantially tubular structure disposed about the core material. Optionally, the ENZ metamaterial comprises a plurality of nanostructures disposed in a host medium. The plurality of nanostructures comprise a transparent conducting oxide. Alternatively, the cladding structure is manufactured via a self-assembly method.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: October 17, 2017
    Assignee: The University of North Carolina at Charlotte
    Inventors: Hossein Alisafaee, Michael Fiddy
  • Patent number: 9784913
    Abstract: Optical waveguide cores having refractive index profiles that vary angularly about a propagation axis of the core can provide single-mode operation with larger core diameters than conventional waveguides. An optical waveguide includes a core that extends along a propagation axis and has a refractive index profile that varies angularly about the propagation axis. The optical waveguide also includes a cladding disposed about the core and extending along the propagation axis. The refractive index profile of the core varies angularly along a length of the propagation axis.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: October 10, 2017
    Assignee: nLIGHT, Inc.
    Inventors: Joona Koponen, Changgeng Ye, Ossi Kimmelma
  • Patent number: 9764563
    Abstract: Disclosed a laser marking machine, method, equipment and system. The method comprises steps of: the control main board receiving coordinate and gray scale value of the target image pixel dot; calculating output power of the target image pixel dot by using the gray scale value; and controlling the laser device to use corresponding output power according to displacement of the galvanometer, and outputting laser specific to each target image pixel dot. By adjusting the output power of target image pixel dot (marking point), a separate pixel dot may reflect the change of gray scale value, so as to represent the image gray scale value. The coordinate of each pixel dot in the gray scale image may be calculated according to the predetermined resolution, such that, the coordinate of pixel dot is no longer adjusted, ensuring the DPI and the resolution of the gray scale image.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: September 19, 2017
    Assignee: MAXPHOTONICS CORPORATION
    Inventors: Jun Song, Gaofeng He, Xiaobo Hu, Feng Jiang
  • Patent number: 9766070
    Abstract: An interferometric measurement device includes a broad-spectrum spontaneous emission light source; a measurement interferometer, receiving a light signal with input light power and delivering a modulated light signal with output light power, the modulated light signal being modulated at a modulation frequency, depending on a physical parameter to be measured and being proportional to the input light power; an optical radiation detector, receiving the modulated light signal exiting from the measurement interferometer and delivering a modulated electrical signal representative of the output light power; a filtering interferometer, insensitive to the physical parameter to be measured, having a free spectral range ISL and a finesse F selected such that an interval of frequencies, centerd around an optimal frequency foptim equal to (2k+1)ISL/2, k being a natural number, and of width ?f equal to [0.9?(3/2F)]ISL, includes the modulation frequency of the modulated light.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: September 19, 2017
    Assignee: IXBLUE
    Inventors: Joachin Honthaas, Herve Lefevre, Eric Ducloux, Jean-Jacques Bonnefois
  • Patent number: 9733424
    Abstract: A multicore fiber according to an embodiment of the present invention includes a plurality of cores and a cladding that encloses the plurality of the cores. The external form of the cladding in a cross section is formed of an arc portion that is formed in an arc shape relative to the center axis of the cladding and a non-arc portion that is pinched between two ends of the arc portion and not formed in an arc shape relative to the center axis of the cladding. The non-arc portion is formed with a pair of projections projecting from two ends of the arc portion on the opposite side of the center axis relative to a straight line connecting the both ends of the arc portion and one or more of recesses pinched between the pair of the projections.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: August 15, 2017
    Assignee: FUJIKURA LTD.
    Inventors: Itaru Ishida, Shoichiro Matsuo
  • Patent number: 9647413
    Abstract: Provided are a high-efficiency parallel-beam laser optical fiber drawing method and optical fiber, the method including the steps of: S1: providing base planes on the side surfaces of both a gain optical fiber preform and a pump optical fiber preform, inwardly processing the base plane of the gain optical fiber preform to make a plurality of ribs protrude, and inwardly providing a plurality of grooves on the base plane of the pump optical fiber preform; S2: embedding the ribs into the grooves, tapering and fixing one end of the combination of the ribs and the grooves to form a parallel-beam laser optical fiber preform; S3: drawing the parallel-beam laser optical fiber preform into parallel-beam laser optical fibers. The process has high repeatability, and the obtained parallel-beam laser achieves peelability of pump optical fibers in a set area, thus facilitating multi-point pump light injection of parallel-beam laser optical fibers.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: May 9, 2017
    Assignee: Fiberhome Telecommunication Technologies Co., Ltd.
    Inventors: Cheng Du, Wei Chen, Shiyu Li, Yili Ke, Qi Mo, Tao Zhang, Wenyong Luo, Kun Du, Rong Dan
  • Patent number: 9645309
    Abstract: Holey fibers provide optical propagation. In various embodiments, a large core holey fiber comprises a cladding region formed by large holes arranged in few layers. The number of layers or rows of holes about the large core can be used to coarse tune the leakage losses of the fundamental and higher modes of a signal, thereby allowing the non-fundamental modes to be substantially eliminated by leakage over a given length of fiber. Fine tuning of leakage losses can be performed by adjusting the hole dimension and/or spacing to yield a desired operation with a desired leakage loss of the fundamental mode. Resulting holey fibers have a large hole dimension and spacing, and thus a large core, when compared to traditional fibers and conventional fibers that propagate a single mode. Other loss mechanisms, such as bend loss and modal spacing can be utilized for selected modes of operation of holey fibers.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: May 9, 2017
    Assignee: IMRA America, Inc.
    Inventors: Liang Dong, Donald J. Harter, William Wong
  • Patent number: 9620923
    Abstract: A device for laterally coupling pump light into a fiber. A fiber runs in a longitudinal direction, having an optically active medium to be pumped and a lateral wall running approximately in the longitudinal direction, and at least one light coupler, at least some part of which runs parallel to the fiber along the lateral wall. The light coupler is an optical waveguide which is optically coupled to the fiber such that pump light propagating in the optical waveguide can be coupled into the fiber via the lateral wall. The efficiency of the pump light coupling is improved by a plurality of windings of the fiber being located alternately with waveguides on a substrate. The pump light can be coupled into all waveguides simultaneously, for example by a prism.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: April 11, 2017
    Assignee: Rosenberger Hochfrequenztechnik GmbH & Co. KG
    Inventors: Benjamin Weigand, Christian Theobald, Johannes Albert L'huillier, Clemens Wurster
  • Patent number: 9577400
    Abstract: Provided is a frequency shifting optical swept light source system. The system includes a light source that emits light; an amplifier that amplifies the light output from the light source; an optical converter that shifts a frequency of the amplified light and compresses a spectrum of the amplified light; and a controller that controls a current signal applied to the light source such that a repetition rate of the light output from the light source is adjusted, so that an intensity of the amplified light is adjusted, to thereby adjust a position of the compressed spectrum with respect to a predetermined frequency band.
    Type: Grant
    Filed: March 18, 2014
    Date of Patent: February 21, 2017
    Assignees: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
    Inventors: Hong-sig Kim, Yoon-chan Jeong, Young-chul Kwon, Luis Alonso Vazquez Zuniga, Woo-young Jang
  • Patent number: 9547176
    Abstract: The invention relates to a device for generating laser radiation (3) having a linear intensity distribution (11), comprising a plurality of laser light sources for generating laser radiation (3) and optical means for transforming laser radiation (3) exiting from the laser light sources into laser radiation (14) that has a linear intensity distribution (11) in a working plane (9), wherein the laser light sources are constructed as fundamental mode lasers and the device is designed such that each of the laser beams (3) exiting from the laser light sources does not overlap with itself.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: January 17, 2017
    Assignee: LIMO PATENTVERWALTUNG GMBH & Co. KG
    Inventors: Vitalij Lissotschenko, Paul Alexander Harten
  • Patent number: 9515765
    Abstract: Implementing a laser into a system that uses a remote powered combiner or an aggregating combiner (AC) with one or more in-range contributing combiners may provide power to the downstream contributing combiners (CC). The power may be provided on the same fiber that downstream signals and the upstream signals traverse.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: December 6, 2016
    Assignee: ARRIS Enterprises, Inc.
    Inventors: Venkatesh G. Mutalik, Marcel F. Schemmann