Patents Examined by Xinning Niu
  • Solid-state laser
    Patent number: 9438003
    Abstract: A solid-state laser arrangement includes a plate-like solid body including a laser-active medium, a heat sink, a layer of adhesive between a carrier face of the heat sink and the plate-like solid body, and a reflective coating on a side of the plate-like solid body facing the adhesive layer, in which the adhesive layer is completely shielded from radiation from the plate-like solid body by a radiation-impermeable region between the side of the plate-like solid body facing the adhesive layer and the carrier face of the heat sink.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: September 6, 2016
    Assignee: TRUMPF LASER GMBH
    Inventors: Sven-Silvius Schad, Elke Dolores Kaiser
  • Laser drive device that drives laser diode, method of controlling the same, and storage medium
    Patent number: 9425584
    Abstract: A laser drive device capable of easily reducing influence of bias light emission and thereby preventing variation in threshold current. A light amount of a laser beam emitted from a laser diode is detected by a photodiode. A drive current supplied to the laser diode is controlled according to the detected light amount to thereby control the amount of light emitted from the laser diode to a plurality of set light amounts. A threshold current is calculated according to the detected light amount and the drive current. The light amounts are changed and selected, and threshold currents calculated with respect to respective set light amounts are compared. A light amount corresponding to a difference in threshold current not less than a predetermined value is set as a set light amount for use in light amount control of the laser diode.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: August 23, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Daisuke Akagi
  • Optical fiber and laser oscillator using same
    Patent number: 9425577
    Abstract: An optical fiber includes a first optical fiber body, a second optical fiber body and a first end cap. The first optical fiber body includes a first core and a first cladding. The second optical fiber body includes a second core and a second cladding, and is joined at a first end surface thereof to a first end surface of the first optical fiber body. The first end cap has light permeability and is joined to a second end surface of the second optical fiber body. The first core is doped with a laser medium. A mass content of the laser medium in the second core is lower than that of the laser medium in the first core.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: August 23, 2016
    Assignee: Mitsuboshi Diamond Industrial Co., LTD.
    Inventors: Christian Schaefer, Masanao Murakami
  • Optical semiconductor device and method for controlling driving circuit
    Patent number: 9419410
    Abstract: An optical semiconductor device includes: an electric-optic conversion element that is provided with a diode; and a driving circuit that drives the diode in a forward direction, the driving circuit including a first switching circuit that is provided with a first switch, and a second switching circuit that is provided with a second switch, wherein the first switching circuit constitutes a first signal line that charges the electric-optic conversion element with an electric charge by bringing the first switch into an ON state and the second switch into an OFF state, and the second switching circuit constitutes a second signal line that discharges the electric charge stored in the electric-optic conversion element by bringing the second switch into an ON state and the first switch into an OFF state.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: August 16, 2016
    Assignee: FUJITSU LIMITED
    Inventor: Tatsuya Usuki
  • Package structure and manufacturing method thereof
    Patent number: 9418931
    Abstract: A manufacturing method of a package structure includes the following steps. A substrate including a core layer, first and second patterned metal layers is provided. The first and second patterned metal layers are respectively disposed on two opposite surfaces of the core layer. A through cavity penetrating the substrate is formed. The substrate is disposed on a tape carrier. A semiconductor component is disposed in the through cavity. An inner wall of the through cavity and a side surface of the semiconductor component define a groove. The filling compound is dispensed above the groove. A heating process is performed for the filling compound to flow toward the tape carrier and comprehensively fill the groove. First and second stacked layers are respectively laminated onto the first and second patterned metal layers and cover at least a part of the semiconductor component.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: August 16, 2016
    Assignee: Subtron Technology Co., Ltd.
    Inventor: Chien-Ming Chen
  • Method of controlling wavelength tunable laser, control data structure of wavelength tunable laser, and wavelength tunable laser
    Patent number: 9413138
    Abstract: A method of controlling a wavelength tunable laser to control an oscillation wavelength based on a difference between a detection result of a wavelength by a wavelength detecting unit and a target value, the method includes: acquiring a first drive condition of the wavelength tunable laser to make the wavelength tunable laser oscillate at a first wavelength from a memory; calculating a second drive condition to drive the wavelength tunable laser at a second wavelength by referring to the first drive condition and a wavelength difference between the first wavelength and the second wavelength, the second wavelength differing from the first wavelength; and driving the wavelength tunable laser based on the second drive condition calculated at the calculating of the second drive condition.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: August 9, 2016
    Assignee: SUMITOMO ELECTRIC DEVICE INNOVATIONS, INC.
    Inventors: Hirokazu Tanaka, Masao Shibata, Hiromitsu Kawamura, Mitsuyoshi Miyata
  • Method for adjusting light emitting device
    Patent number: 9397475
    Abstract: Light with a short pulse width is emitted using a simple structure. A light source 101, a differentiation circuit 102, and a switch 103 are connected in series. When the switch 103 is switched on, inrush current flows in a capacitor 102b forming the differentiation circuit 102, and accordingly the light source 101 is supplied with electric current and thereby emits light. When the capacitor 102b is charged, electric current flows in a resistor 102a, and voltage drops at the resistor 102a. Then, the voltage applied to the light source 101 is decreased, whereby the light source 101 stops emitting light. The values of the resistor 102a and the capacitor 102b are adjusted so that the above phenomenon occurs.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: July 19, 2016
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Yoshiaki Goto, Yoshikatsu Tokuda
  • Fiber laser assembly and method of generating light
    Patent number: 9397464
    Abstract: A modal instability of a fiber amplifier may be reduced by coupling, e.g. splicing, a length of passive multimode optical fiber to an active multimode optical fiber of the fiber amplifier. Upon launching light into the passive optical fiber, some higher order transversal modes may be excited in the passive optical fiber. The higher-order modes may interfere with the fundamental mode in the passive multimode optical fiber. However, the intermodal interference of the launched modes does not cause thermal gradients in the passive optical fiber. Upon propagation in the passive multimode optical fiber, the excited optical modes may lose mutual coherence, causing a reduction of contrast of the intermodal interference pattern along the doped core of the active optical fiber, effectively reducing modal instability in the active optical fiber.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: July 19, 2016
    Assignee: Lumentum Operations LLC
    Inventors: Martin H. Muendel, Xiuquan Ma, Kai-Hsiu Liao, Matthew Kutsuris
  • Laser package having multiple emitters configured on a support member
    Patent number: 9371970
    Abstract: A method and device for emitting electromagnetic radiation at high power using nonpolar or semipolar gallium containing substrates such as GaN, AlN, InN, InGaN, AlGaN, and AlInGaN, is provided. In various embodiments, the laser device includes plural laser emitters emitting green or blue laser light, integrated a substrate.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: June 21, 2016
    Assignee: Soraa Laser Diode, Inc.
    Inventors: Eric Goutain, James W. Raring, Paul Rudy, Hua Huang
  • System and methods for reduced power consumption and heat removal in optical and optoelectronic devices and subassemblies
    Patent number: 9370123
    Abstract: A heat removal system for use in optical and optoelectronic devices and subassemblies is provided. The heat removal system lowers the power consumption of one or more active cooling components within the device or subassembly, such as a TEC, which is used to remove heat from heat generating components within the device or subassembly. For any particular application, the heat removal system more efficiently removes the heat from the active cooling component, by using a heat transfer assembly, such as a planar heat pipe type assembly. The heat transfer assembly employs properties like, but not limited to, phase transition change and thermal conductivity to move heat without external power. In some embodiments, the heat transfer assembly can be used to allow the active cooling component, such as a TEC to be removed, leaving the heat transfer assembly to remove the heat from the device or subassembly.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: June 14, 2016
    Assignee: OE SOLUTIONS AMERICA, INC.
    Inventor: Daniel Jacob Blumenthal
  • Laser resonator for generating frequency-converted laser radiation
    Patent number: 9362704
    Abstract: The invention relates to a laser resonator for generating frequency-converted laser radiation, comprising a laser-active solid-state medium and a wavelength conversion crystal. A transmissive optical element having a concavely curved surface for generating collimated laser radiation is arranged in the laser resonator.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: June 7, 2016
    Assignee: Trumpf Laser Marking Systems AG
    Inventors: Carsten Ziolek, Sven Joosten, Dietmar Kruse
  • Supercontinuum system with microstructured photonic crystal fibers based on fluoride glass
    Patent number: 9362707
    Abstract: A fiber-based supercontinuum system including: a pump laser; a ZBLAN or other fluoride-based microstructured glass fiber; and control electronics; wherein the control electronics control the pump laser to generate laser pulses into the ZBLAN or other fluoride-based microstructured glass fiber. The fabrication of a ZBLAN photonic crystal fiber with sub-micron features and large air-filling fraction and the use of the fiber to generate a stable supercontinuum (200 to 2500 nm) from 140 fs, 1 nJ pulses at 1042 nm are disclosed.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: June 7, 2016
    Assignee: Max-Planek-Gesellschaft Zur Foderung der Wissenschaften EV.
    Inventors: Xin Jiang, Fehim Babic, Nicolas Y. Joly, Philip St. J. Russell
  • Narrow line-width laser characterization based on bi-directional pumped Brillouin random fiber laser
    Patent number: 9356421
    Abstract: A method and apparatus for launching optical pump signals into a disordered gain medium at two points thereby producing a narrow line-width random fiber laser within the disordered gain medium. The optical pump signals are propagated in a direction through the disordered gain medium towards one another. The apparatus may comprise an optical gain fiber having a first end configured to receive a first fiber pump signal and a second end configured to receive a second fiber pump signal such that the first fiber pump signal and the second fiber pump signal propagate within the optical gain fiber in a direction towards one another. An optical loss device is coupled to the optical gain fiber, wherein the optical loss device isolates a narrow line-width random fiber laser signal from a signal generated within the optical gain fiber.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: May 31, 2016
    Assignee: University of Ottawa
    Inventors: Zhonghua Ou, Xiaoyi Bao, Yang Li, Liang Chen
  • Cooling disk lasers
    Patent number: 9337614
    Abstract: A laser disk module includes a lasing element including an active gain medium, the lasing element including opposite top and bottom end surfaces, and a heat transfer element adjacent the bottom end surface, the heat transfer element including a ceramic material that defines a plurality of cooling structures. The heat transfer element is configured to transfer heat generated in the lasing element to a coolant in contact with the heat transfer element in the plurality of cooling structures during operation of the laser disk module.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: May 10, 2016
    Assignee: TRUMPF LASER GMBH
    Inventors: Alexander Killi, Klaus Wallmeroth, Thilo Vethake, Vincent Kuhn
  • Carbon dioxide gas laser oscillator which can estimate composition ratio of laser gas
    Patent number: 9337604
    Abstract: A laser gas estimation device includes a laser oscillator including a ventilator which circulates a laser gas, a discharge tube, a ventilator power unit which supplies power to the ventilator, and a discharge tube power unit which supplies power to the discharge tube, a detection unit which detects gas pressure of the laser gas, ventilator voltage applied to the ventilator, ventilator current supplied to the ventilator, discharge tube voltage applied to the discharge tube, and discharge tube current supplied to the discharge tube, and a composition ratio estimation unit which estimates the composition ratio of the laser gas based on a detected value detected by the detection unit.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: May 10, 2016
    Assignee: Fanuc Corporation
    Inventor: Tetsuhisa Takazane
  • Frequency locked diode laser devices exhibiting low power penalty
    Patent number: 9331455
    Abstract: A laser diode apparatus including a diode laser, optics efficiently collimate the diode laser beam, and a narrow band reflector to provide optical feedback for wavelength stabilization of the diode laser in an extended cavity configuration. The extended cavity laser diode assembly has a low reflectivity coating applied to the front facet, and a narrow-band reflectivity engineered to optimize the output power from the diode laser, leading to power penalty-free operation of the extended cavity laser diode assembly as compared to a free-running diode laser. The extended cavity laser diode assembly can equally applied to a plurality of laser diodes, with either a single or a plurality of optical feedback devices forming the extended cavity configuration.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: May 3, 2016
    Assignee: nLIGHT Photonics Corporation
    Inventors: Paul Leisher, Steve Patterson
  • Dynamic tunable low latency chromatic dispersion compensator
    Patent number: 9331784
    Abstract: A dynamic tunable chromatic dispersion compensator with low latency is provided that includes a chirped fiber Bragg grating in a compensating optical fiber core. The chirped fiber Bragg grating includes wavelength gratings spaced at distances varying with respect to the length of the compensating optical fiber core to compensate for differential delay in a synchronous time protocol for a bidirectional computer data communication link. The dynamic tunable chromatic dispersion compensator also includes one or more controllable elements to modify the length of the compensating optical fiber core in response to one or more commands, and an optical junction to optically couple the chirped fiber Bragg grating to an optical fiber of the bidirectional computer data communication link.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: May 3, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Casimer M. DeCusatis
  • Photonic modulator and switch
    Patent number: 9329378
    Abstract: The invention taught herein provides a method, device and system for modulating or switching electromagnetic radiation by controlling a state of the radiation, such as a polarization state. Radiation is directed at a reflective or transmissive structure, such that the radiation is incident on the structure. The structure includes a property that can be dynamically switched between two configurations, one of which is asymmetric and is configured to modify the polarization characteristic of the radiation. The dynamically configurable structure can be combined with polarization components to achieve modulation. Embodiments suitable for mode-locking a laser and for cavity dumping a mode-locked laser are also disclosed.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: May 3, 2016
    Inventor: Joshua Noel Hogan
  • Raman distributed feedback fiber laser and high power laser system using the same
    Patent number: 9325152
    Abstract: A Raman distributed feedback (DFB) fiber laser is disclosed. It includes a pump source and a Raman gain fiber of a length smaller than 20 cm containing a distributed feedback (DFB) grating with a discrete phase structure located within no more than 10% off the center of the grating and wherein the Raman DFB fiber laser generates a laser signal with an optical spectrum, which has an optical bandwidth at half maximum optical intensity of less than 1 gigahertz (GHz) (wherein a maximum intensity frequency is different from the frequency of the pump laser). The Raman laser includes compensation for the nonlinear phase change due to Kerr effect and thermal effect resulting from absorption of the optical field, thus enhancing the conversion efficiency.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: April 26, 2016
    Assignee: OFS FITEL, LLC
    Inventors: Kazi S. Abedin, Tristan Kremp, Jeffrey W. Nicholson, Jerome C. Porque, Paul S. Westbrook
  • Deep ultra-violet light sources for wafer and reticle inspection systems
    Patent number: 9318870
    Abstract: Disclosed are methods and apparatus for generating a sub-208 nm laser. A laser apparatus includes one or more seed radiation sources for generating a first radiation beam having a first fundamental wavelength on a first optical path and a second radiation beam having a second fundamental wavelength on a second optical path, a first amplifier for amplifying the first radiation beam, a second amplifier for amplifying the second radiation beam, and a wavelength conversion module comprising a plurality of crystals for frequency multiplying and mixing the amplified first and second radiation beams to produce an output beam at a fifth harmonic that is less than about 208 nm.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: April 19, 2016
    Assignee: KLA-Tencor Corporation
    Inventors: Gang Lei, Damon F. Kvamme