Harmonic Generator Patents (Class 359/328)
  • Patent number: 10989985
    Abstract: Provided herein is a wavelength converter capable of producing shorter wavelengths by wavelength conversion than in related art. A wavelength converter of the present disclosure includes: a first layer formed of a single crystal represented by general formula RAMO4; and a second layer formed of a single crystal represented by the general formula RAMO4 and having a direction of polarization reversed 180° from a direction of polarization of the first layer, wherein, in the general formula, R represents one or more trivalent elements selected from the group consisting of Sc, In, Y, and a lanthanoid element, A represents one or more trivalent elements selected from the group consisting of Fe(III), Ga, and Al, and M represents one or more divalent elements selected from the group consisting of Mg, Mn, Fe(II), Co, Cu, Zn, and Cd.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: April 27, 2021
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Kentaro Miyano, Naoya Ryoki, Akihiko Ishibashi, Masaki Nobuoka
  • Patent number: 10965091
    Abstract: The present invention relates to a novel stand-off distance chemical detector system such as can be used, for example, for standoff detection of explosives. Instead of a conventional lasing medium, a Pr:YAG or Pr:BYF based UV laser is used which can be advantageously implemented in Raman spectroscopy.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: March 30, 2021
    Assignee: Alakai Defense Systems, Inc.
    Inventors: Robert Douglas Waterbury, Darius Vunck, Robert Dean Babnick, Timothy Molner, Hunter Hardy, Ed Dottery, Robert McKinney, David Welford
  • Patent number: 10923874
    Abstract: The present invention concerns a multiple soliton comb generation method comprising the steps of: providing a single optical resonator configured to support a plurality of distinct spatial modes in which light can propagate; providing an optical pump laser source; simultaneously optically pumping a plurality of distinct spatial modes of the single optical resonator to simultaneously generate independent soliton states in the distinct spatial modes and generate a plurality of frequency combs.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: February 16, 2021
    Inventors: Erwan Guillaume Albert Lucas, Grigory Lihachev, Nikolay Pavlov, Michael Gorodetsky, Tobias Kippenberg
  • Patent number: 10901297
    Abstract: A resonant-structured optical transistor includes a nonlinear medium which generates a second harmonic wave through second-order nonlinear interaction with an incident pump wave, and generates an amplified signal wave and a converted wave having a difference frequency through second-order nonlinear interaction between the incident signal wave and the second harmonic wave, a first mirror which transmits, to the nonlinear medium, the pump wave or the signal wave, and reflects the second harmonic wave on one surface of the nonlinear medium, and a second mirror which transmits the pump wave, the signal wave, or the converted wave, and reflects the second harmonic wave on another surface of the nonlinear medium. The pump wave is incident to the nonlinear medium through the first mirror in a first operation mode, and the pump wave and the signal wave are incident to the nonlinear medium through the first mirror in a second operation mode.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: January 26, 2021
    Inventor: Jongbae Kim
  • Patent number: 10852432
    Abstract: The current disclosure is directed to an apparatus and method of a Laser Designator/Rangefinder (LDR) having two wavelengths of 1064 nm and 1572 nm. The 1064 nm wavelength laser is generated by a pump diode by exciting Nd:YAG medium (source). The 1572 nm wavelength laser is produced using an OPO-OPA converted which is located in a by-pass path. Because the 1572 nm wavelength uses near diffraction limited signal, it provides long range identification and tracking capability needed for advanced tactical platforms, while using the smallest transmit aperture, in a low Size, Weight and Power Consumption (SWaP) package.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: December 1, 2020
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: David P. Kelly, John C. McCarthy, Christopher A. Miller, Hermanus S. Pretorius, Katherine J. Snell
  • Patent number: 10824047
    Abstract: A system for optical comb carrier envelope offset frequency control includes a mode-locked oscillator. The mode-locked oscillator produces an output beam using an input beam and one or more control signals. The output beam includes a controlled carrier envelope offset frequency. A beat note generator produces a beat note signal using a portion of the output beam. A control signal generator produces the one or more control signals to set the beat note signal by modulating the intensity of the input beam within the mode locked oscillator. Modulating the intensity comprises using a Mach-Zehnder intensity modulator or using an intensity modulated external laser to affect a gain medium within the mode-locked laser.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: November 3, 2020
    Assignee: AOSense, Inc.
    Inventors: Arman Cingoz, Dmitriy Churin, Jonathan Roslund, Miao Zhu
  • Patent number: 10763820
    Abstract: A method of manufacturing an electronic device formed in a cavity may include, on a first substrate having a bottom surface and a top surface, forming a first side wall of a certain height along a periphery on the bottom surface to surround an electronic circuit disposed on the bottom surface; forming a via communicating between the bottom surface and the top surface, forming of the via including stacking a first stop layer and a second stop layer sequentially on a portion of the bottom surface of the first substrate corresponding to the via and etching the first substrate to form a through-hole corresponding to the via, a rate of etching the first substrate being greater than that of the first stop layer and a rate of etching the first stop layer being greater than that of the second stop layer; forming a second side wall of a certain height along a periphery on a top surface of the second substrate; and aligning and bonding the first side wall and the second side wall.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: September 1, 2020
    Inventor: Atsushi Takano
  • Patent number: 10739515
    Abstract: A waveguide having a light-shielding film formed on a cut surface of an edge side of the planar waveguide, the light-shielding film having a thickness of 2 to 10 ?m and an optical density (OD) of 0.7 to 1.0 based on a light-shielding film thickness of 1.0 ?m, and a method for manufacturing the same.
    Type: Grant
    Filed: November 23, 2017
    Date of Patent: August 11, 2020
    Assignee: LG Chem, Ltd.
    Inventors: A-Reum Kim, Jae-Hyun Yoo, Sung-Eun Park, Joon-Hyung Kim
  • Patent number: 10634974
    Abstract: A converter includes a combiner configured to polarization-combine a first pump light and a second pump light, a nonlinear medium configured to wavelength-convert first signal light into second signal light to output the second signal light after wavelength conversion from a second port, and to wavelength-convert the second signal light into first signal light to output the first signal light after wavelength conversion from the first port, a first circulator configured to input the first signal light from the first port into the nonlinear medium, and output the first signal light after wavelength conversion in the nonlinear medium from the first port, and a second circulator configured to input the second signal light from the second port into the nonlinear medium, and output the second signal light after wavelength conversion in the nonlinear medium from the second port.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: April 28, 2020
    Inventors: Norifumi Shukunami, Tomoaki Takeyama
  • Patent number: 10630044
    Abstract: A frequency-doubled laser, including: a first reflecting mirror, a second reflecting mirror, a gain medium, a telescope module, a polarizing element, and a nonlinear crystal; the first reflecting mirror and the second reflecting mirror are spaced apart to form a resonator of the frequency-doubled laser; the polarizing element, the gain medium, the telescope module, and the nonlinear crystal are located in the resonator, and the telescope module is located between the gain medium and the nonlinear crystal. The present disclosure further provides a method of generating harmonic laser. The frequency-doubled laser and the method of generating harmonic laser make the position of nonlinear crystal more flexible, and the possibility of damage to the nonlinear crystal is reduced.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: April 21, 2020
    Inventors: Baohua Zhu, Zhiqiang Fang, Yezhao Lu, Jin Wang, Yunfeng Gao
  • Patent number: 10599007
    Abstract: Various embodiments of the present technology provide a novel architecture for optical frequency conversion in a waveguide which can be applied to any suitable nonlinear waveguide material and any wavelength. In accordance with some embodiments, phase-matched bends can be used to increase the nonlinear interaction length. For example, the device can begin with a straight waveguide section with a width designed for phase-matching. When the straight waveguide section approaches the end of the chip, a bending waveguide section allows the waveguide to meander back in the opposite direction. Various embodiments of the bend can have a wider or narrower width to eliminate phase-matching for second harmonic generation (SHG) and instead provide a 2? phase-shift between the pump and signal light. Therefore, at the end of the bend, the pump and signal light are in-phase and a phase-matched width will continue the SHG process.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: March 24, 2020
    Assignees: The Regents of the University of Colorado, a body corporate, Government of the United States of America, as represented by the Secretary of Commerce National Institute of Standards and Technology
    Inventors: Eric Stanton, Jeffrey Chiles
  • Patent number: 10474004
    Abstract: An optical ring-resonator converts visible wavelength radiation to ultraviolet wavelength radiation by frequency-doubling the visible wavelength radiation in an optically nonlinear crystal. The resonator includes an uncoated birefringent out-coupling prism. The visible wavelength radiation passes through faces of the prism at a Brewster-angle. Ultraviolet wavelength radiation enters the prism, is totally internally reflected, directed out of the prism at a Brewster-angle, and exits the ring-resonator as output radiation.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: November 12, 2019
    Assignee: Coherent LaserSystems GmbH & Co. KG
    Inventors: Wolf Seelert, Rüdiger Von Elm
  • Patent number: 10454356
    Abstract: The invention relates to a drive system (1) with electromagnetic energy transfer. The system (1) comprises a track (3) comprising a plurality of stators (4), each stator (4) having at least one winding adapted to generate a magnetic field having a fundamental harmonic (8) and at least one further harmonic (9) when fed with an varying current, and a movable element (2) comprising a primary magnetic element (5) adapted to receive said fundamental harmonic (8) to drive said movable element (2) along said track. The system (1) is characterized in that said movable element (2) further comprises a secondary magnetic element (6a-6c) adapted to receive said at least one further harmonic (9) to generate power onboard of said movable element (2). The invention also relates to a linear fractional slot synchronous machine and a rotational synchronous machine.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: October 22, 2019
    Inventors: Davide Borghi, Stefano Flore, Claudio Bianchini, Matteo Davoli
  • Patent number: 10331012
    Abstract: An apparatus for generating narrow-band single and multi-photon state with long coherence length is disclosed. The apparatus comprises a laser pump (20) producing laser light, a non-linear optical crystal (30) within an optical cavity (40), wherein the optical cavity (40) comprises at least two mirrors (42, 44); and a tuning crystal (50) situated between the non-linear optical crystal (30) and a first one (42) of the at least two mirrors.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: June 25, 2019
    Assignee: Universität Wien
    Inventors: Amir Moqanaki, Francesco Massa, Philip Walther
  • Patent number: 10297969
    Abstract: The present application discloses various embodiments of a high peak power laser system which includes a diode pump source configured to directly pump at least one optical crystal positioned within the laser cavity, the diode pump source emitting at least one pump beam comprised of two or more vertically stacked optical signals having a wavelength from about 400 nm to about 1100 nm., the optical crystal configured to output at least one optical output having a wavelength of about 750 nm to about 1100 nm and having an output power of about 25 kW or more.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: May 21, 2019
    Assignee: Newport Corporation
    Inventors: Andrei C. Florean, James D. Kafka
  • Patent number: 10259716
    Abstract: A compound is generally provided that has the formula: Ln3-xBxM5-yByO12, where Ln comprises Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or a mixture thereof; x is 0 to about 1.5; M comprises Ga, In, Al, Fe, or a combination thereof; y is 0 to about 2.5; and x+y is greater than 0. A composition is also provided that includes a silicon-containing material (e.g., silicon metal and/or a silicide) and the boron-doped refractory compound having the formula described above, such as about 0.001% to about 85% by volume of the boron-doped refractory compound.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: April 16, 2019
    Assignee: General Electric Company
    Inventors: Glen Harold Kirby, Julin Wan
  • Patent number: 10256599
    Abstract: A laser light-source apparatus includes: a fiber amplifier and a solid-state amplifier to amplify pulse light output from a seed light source serving as a first light source; a nonlinear optical element to perform wavelength conversion on the pulse light output from the solid-state amplifier; an optical switching element to permit or stop propagation of the pulse light from the fiber amplifier to the solid-state amplifier; a second light source disposed on an upstream side of the solid-state amplifier and is configured to output laser light able to be combined with the pulse light output from the seed light source; and a control unit to control the optical switching element in such a manner that the propagation of light is stopped and to perform control in such a manner that the second light source oscillates, at least in an output period of the pulse light from the seed light source.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: April 9, 2019
    Inventors: Joji Okada, Yosuke Orii, Shinichi Murayama, Daisuke Okuyama
  • Patent number: 10248004
    Abstract: A method for the inscription of second-order nonlinear optical properties on a support including an amorphous material, the method including: heating the support within a temperature range allowing the movement of charges inside the support; applying a structured electrode to the support, generating an electrical field designed to induce the formation of non-linear optical properties on the surface of the support; and cooling the support.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: April 2, 2019
    Inventors: Marc Gaston Joseph Henri Dussauze, Evelyne Claude Fargin, Vincent Jean Paul Rodriguez, Thierry Cardinal, Frédéric Robert Adamietz
  • Patent number: 10250271
    Abstract: According to one embodiment, a quantum computation apparatus includes a plurality of quantum nonlinear oscillators, a controller, and a measuring device. Each of the quantum nonlinear oscillators implements superposition of distinguishable quantum states by bifurcating one quantum state via a quantum adiabatic change controlled by a bifurcation parameter. The quantum nonlinear oscillators couple with each other by nondissipative coupling accompanying no loss. The controller individually controls the bifurcation parameters of the quantum nonlinear oscillators. A measuring device measures outputs from the quantum nonlinear oscillators.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: April 2, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hayato Goto
  • Patent number: 10243319
    Abstract: An optical system including a laser system for generating a plurality of coaxial laser beams. The laser beams are combined by the laser system for generating at least two different frequency components. One or more hollow core photonic crystal fibers each filled with a noble gas receive the coaxial laser beams from the laser system and generate an idler emission having an idler frequency component according to four-wave mixing of the at least two different frequency components in the one or more hollow core photonic crystal fibers. A control system is configured to control a gas pressure of the one or more hollow core photonic crystal fibers for controlling the idler frequency component of the idler emission.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: March 26, 2019
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Christian K. Keyser, Chad M. Welsh
  • Patent number: 10234744
    Abstract: The present invention belongs to the technical field of lasers, and particularly relates to a periodically poled crystal and an optical parametric amplifier. The present invention provides a periodically poled crystal, including a first nonlinear region, a linear region and a second nonlinear region, wherein the first nonlinear region and the second nonlinear region both have periodically poled structures. The optical parametric amplifier having the periodically poled crystal can separate the idler wave from the signal wave besides achieving the basic function of optical parametric amplification because the by-produced idler wave transmits in a direction different from the directions that the signal wave and the pump wave transmit, and therefore the energy reflow is suppressed when the optical parametric amplifier has reached saturated amplification, and the performance of the optical parametric amplifier is significantly improved.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: March 19, 2019
    Inventors: Haizhe Zhong, Ying Li, Changwen Xu, Jianlong Yang, Shiwei Wang, Dianyuan Fan
  • Patent number: 10211590
    Abstract: A system includes a laser system having a master oscillator and a planar waveguide (PWG) amplifier having one or more laser diode pump arrays, a pumphead, input optics, and output optics. The system also includes an optical bench and cooling manifold coupled to the pumphead. The optical bench and cooling manifold is configured to provide coolant to the one or more laser diode pump arrays and the pumphead through the optical bench and cooling manifold. The optical bench and cooling manifold is also configured to partially deform during operation of the laser system. A housing of the pumphead is coupled to the input and output optics to maintain optical alignment of the pumphead with the input and output optics.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: February 19, 2019
    Assignee: Raytheon Company
    Inventors: David M. Filgas, Stephen H. McGanty
  • Patent number: 10063034
    Abstract: An external resonator type light emitting system includes a light source oscillating a semiconductor laser light by itself and a grating device providing an external resonator with the light source. The system performs oscillation in single mode. The light source includes an active layer oscillating the semiconductor laser light. The grating device includes an optical waveguide having an incident face to which the semiconductor laser is incident and an emitting face of emitting an emitting light of a desired wavelength, a Bragg grating formed in the optical waveguide, and a propagating portion provided between the incident face and the Bragg grating. Formulas (1) to (5) are satisfied.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: August 28, 2018
    Assignee: NGK INSULATORS, LTD.
    Inventors: Jungo Kondo, Shoichiro Yamaguchi, Takashi Yoshino, Yukihisa Takeuchi
  • Patent number: 9927637
    Abstract: To reduce the optical loss, lower the driving voltage, produce a smaller product, and simplify the production process, an embodiment of the present invention includes a rib waveguide core (101) having a rib region (101r) and two slab regions (101s), where a depletion layer (113) is so formed as to extend from the rib region (101r) to the two slab regions (101s).
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: March 27, 2018
    Assignee: FUJIKURA LTD.
    Inventor: Kensuke Ogawa
  • Patent number: 9918375
    Abstract: The present disclosure is directed to laser produced plasma light sources having a target material, such as Xenon, that is coated on the outer surface of a cylindrically-symmetric element (e.g., drum). Embodiments include a pre-pulsing arrangement which can be optimized to reduce irradiation damage to the drum and a pulse trimming unit which can be employed to reduce irradiation damage to the drum. In addition, an embodiment is disclosed wherein the surface of a cylindrically-symmetric element is formed with a plurality of grooves having a groove depth greater than 1 mm and a focusing unit focusing a laser beam and establishing an irradiation site to produce plasma from the target material, with the irradiation site distanced from a groove surface portion to protect the surface portion from irradiation damage.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: March 13, 2018
    Assignee: KLA-Tencor Corporation
    Inventors: Alexey Kuritsyn, Ye Liu, Oleg Khodykin
  • Patent number: 9857659
    Abstract: A laser device includes a light source that radiates a laser beam having one or more frequencies, and a nonlinear optical medium on which the laser beam is incident, the non-linear optical medium including at least one dispersive medium that is transparent and arranged along a direction in which the laser beam is radiated. The nonlinear optical medium drives a nonlinear optical process including generation of laser beams having different frequencies. The at least one dispersive medium has an effective thickness that causes a relative phase relationship among all the laser beams relevant to the nonlinear optical process to approximately satisfy a predetermined value.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: January 2, 2018
    Assignee: The University of Electro-Communications
    Inventor: Masayuki Katsuragawa
  • Patent number: 9846348
    Abstract: Efficient harmonic light generation can be achieved with ultrathin films by coupling an incident pump wave to an epsilon-near-zero (ENZ) mode of the thin film. As an example, efficient third harmonic generation from an indium tin oxide nanofilm (?/42 thick) on a glass substrate for a pump wavelength of 1.4 ?m was demonstrated. A conversion efficiency of 3.3×10?6 was achieved by exploiting the field enhancement properties of the ENZ mode with an enhancement factor of 200. This nanoscale frequency conversion method is applicable to other plasmonic materials and reststrahlen materials in proximity of the longitudinal optical phonon frequencies.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: December 19, 2017
    Assignee: National Technology & Engineering Solutions of Sandia, LLC
    Inventors: Ting S. Luk, Michael B. Sinclair, Salvatore Campione
  • Patent number: 9819140
    Abstract: The laser cavity is of the unstable type and is provided with a passive Q-switch, the passive Q-switch comprising a saturable absorber that has an absorption gradient, so that the absorption profile of the saturable absorber is inhomogeneous over the cross section of the beam travelling in the laser cavity.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: November 14, 2017
    Inventor: Jean-Eucher Montagne
  • Patent number: 9794065
    Abstract: Methods and apparatus for distribution of keys are disclosed. An optical signal for carrying encoded information in accordance with a quantum key distribution scheme is generated. The generated optical signal has a wavelength which is changed to another wavelength prior to transmission of the optical signal. The optical signal carrying the encoded information and having the changed wavelength is received, where after decoding of the information takes place by means of detector apparatus operating in the changed wavelength.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: October 17, 2017
    Assignee: Nokia Technologies Oy
    Inventors: Joachim Wabnig, Antti Niskanen, Hongwei Li, David Bitauld
  • Patent number: 9778428
    Abstract: Provided is a semiconductor optical device, an arrayed semiconductor optical device, an optical module having a structure to reduce the parasitic capacitance as well as a high design degree of freedom and having a multilayer structure in which a semi-insulating substrate, a first semiconductor layer having one conductive type, an active layer having light emission function, a second semiconductor layer having the other conductive type, an insulating layer, and a conductive layer are stacked in order from the bottom. The multilayer structure includes a light emitting structure, a first electrode structure, and a second electrode structure. In the semi-insulating substrate and the first semiconductor layer, a first grove which separates the second electrode structure from a remaining portion and approaches the second electrode structure with a non-linear shape rather than a linear shape in its entirety is formed.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: October 3, 2017
    Assignee: OCLARO JAPAN, INC.
    Inventors: Koichiro Adachi, Kouji Nakahara
  • Patent number: 9742145
    Abstract: A high-efficiency non-collinearly phase matched parametric oscillator is provided, wherein a laser pumps a nonlinear optical material with a plural number of flat reflection surfaces that zigzag at least one parametrically generated off-axis radiation about the pump laser beam axis via multiple reflections from the surfaces. The off-axis zigzag oscillation of the radiation establishes parametric oscillation and improves energy coupling among mixing waves in a monolithic nonlinear optical material. Preferably the pump laser has a transverse beam size covering the area of the zigzagging parametrically generated radiation. To further enhance the performance of the off-axis zigzag parametric oscillator, the other parametrically generated radiation can be seeded by an external laser source or resonated in a cavity. The present invention also includes a double-side pumped off-axis zigzag parametric oscillator installed inside a standing-wave pump-laser cavity.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: August 22, 2017
    Assignee: National Tsing Hua University
    Inventors: Yen-Chieh Huang, Tsong-Dong Wang, Yu-Chung Chiu, Po-Cheng Wang
  • Patent number: 9709811
    Abstract: A system for separating plasma pumping light and collected broadband light includes a pump source configured to generate pumping illumination including at least a first wavelength, a gas containment element for containing a volume of gas, a collector configured to focus the pumping illumination from the pumping source into the volume of gas to generate a plasma within the volume of gas, wherein the plasma emits broadband radiation including at least a second wavelength and an illumination separation prism element positioned between a reflective surface of the collector and the pump source and arranged to spatially separate the pumping illumination including the first wavelength and the emitted broadband radiation including at least a second wavelength emitted from the plasma.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: July 18, 2017
    Assignee: KLA-Tencor Corporation
    Inventors: Anatoly Shchemelinin, Ilya Bezel, Matthew Panzer, Eugene Shifrin
  • Patent number: 9686020
    Abstract: A signal processing device that processes a digital signal formed by sampling an electric signal using a clock signal, the electric signal being obtained by converting an optical signal inputted from a transmission line, the signal processing device includes: a first chromatic dispersion compensator that compensates a waveform distortion caused by a chromatic dispersion with respect to the digital signal; a first nonlinear optical effect compensator that compensates a waveform distortion caused by a nonlinear optical effect with respect to one signal outputted from the first chromatic dispersion compensator; and a controller that detects a phase fluctuation of other signal outputted from the first chromatic dispersion compensator, and controls the clock signal based on the detected phase fluctuation.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: June 20, 2017
    Inventors: Hikari Mochizuki, Takeshi Hoshida, Osamu Takeuchi
  • Patent number: 9563060
    Abstract: A beam-relay optical system is provided. The beam-relay optical system may include a single-mode optical fiber. The beam-relay optical system may also include a mode matching component. The beam-relay optical system may also include an optical resonator, where the optical resonator may include a cavity. The beam-relay optical system may also include a relay optical component. The relay optical component may relay an output of the mode matching component to the optical resonator.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: February 7, 2017
    Assignee: Lockheed Martin Corporation
    Inventor: Paul Zorabedian
  • Patent number: 9523607
    Abstract: A tunable coherent radiation source comprises a pump laser which outputs a pump beam and a non-linear optical medium having a tuning pattern to provide tuning across a wavelength range. A translation system is arranged such that the pump beam is translated across the tuning pattern. The scanning pattern is formed such that translation of the pump beam across the tuning pattern provides one or more discontinuities in tuning across the wavelength range. A spectroscopic system and a hyperspectral imaging system comprising such a tunable coherent radiation source are described, as is a non-linear optical medium adapted for use in such a source. A method of providing coherent radiation tuned over a wavelength range is also described.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: December 20, 2016
    Inventor: Graeme Malcolm
  • Patent number: 9431788
    Abstract: A mode converter for use with a higher-order mode (HOM)-based fiber amplifiers takes the form of axicon-based configuration that is able to convert high power (tens of mW and higher) optical signals propagating in higher-order mode form into a diffraction-limited beam without experiencing the nonlinear effects (such as self-phase modulation) that are found when using a long-period grating (LPG) to create a diffraction-limited beam by performing mode conversion. The axicon may comprise a bulk optic device, a fiber-based device, or a GRIN-based configuration (where the refractive index profile of the GRIN element is formed to create a diffraction-limited signal).
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: August 30, 2016
    Assignee: OFS FITEL, LLC
    Inventor: Jeffrey W Nicholson
  • Patent number: 9379516
    Abstract: A pulsed laser system may include a Raman fiber that is configured to act as multiple wavelength Raman laser. The fiber is configured to receive a pulsed input beam from an input source and convert the input beam to an output beam having narrow band outputs at first and second frequencies v1 and v2.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: June 28, 2016
    Assignee: IPG Photonics Corporation
    Inventors: Gregory L. Keaton, Manuel J. Leonardo, Mark W. Byer, Kiyomi Monro
  • Patent number: 9377388
    Abstract: A microsphere-based analytic chemistry system and method for making the same is disclosed in which microspheres or particles carrying bioactive agents may be combined randomly or in ordered fashion and dispersed on a substrate to form an array while maintaining the ability to identify the location of bioactive agents and particles within the array using an optically interrogatable, optical signature encoding scheme. A wide variety of modified substrates may be employed which provide either discrete or non-discrete sites for accommodating the microspheres in either random or patterned distributions. The substrates may be constructed from a variety of materials to form either two-dimensional or three-dimensional configurations. In a preferred embodiment, a modified fiber optic bundle or array is employed as a substrate to produce a high density array. The disclosed system and method have utility for detecting target analytes and screening large libraries of bioactive agents.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: June 28, 2016
    Assignee: Trustees of Tufts College
    Inventors: David R. Walt, Karri Lynn Michael-Ballard
  • Patent number: 9366939
    Abstract: A method for generating ultrashort femtosecond pulses in the optical parametric oscillator pumped by long pulses, comprising governing dispersion and nonlinearity in the optical parametric oscillator, forming linearly-chirped long pulses with broad bandwidth in the optical parametric oscillator, compressing the linearly-chirped long pulses to femtosecond pulses by a second-order dispersion outside the optical parametric oscillator cavity. The ultrashort femtosecond pulse is generated in the OPO with long pulse pumping.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: June 14, 2016
    Assignee: Shanghai Jiao Tong University
    Inventors: Guoqiang Xie, Liejia Qian, Fuyong Wang, Zhipeng Qin, Peng Yuan
  • Patent number: 9360610
    Abstract: The present invention relates to a borate birefringent crystal applicable to ultraviolet (UV) or deep ultraviolet (DUV) range, with chemical formula of Ba2Mg(B3O6)2. The borate birefringent crystal belongs to a trigonal system, with space group of R-3 wherein a=0.70528(3) nm, c=1.65520(9) nm and Z=12. The barium magnesium borate birefringent crystal is negative uniaxial (ne<no) with a birefringence of 0.077-0.229 and a transmission range of 177-3000 nm. The crystal is easy to cut, grind, polish, and preserve, and is stable in air and is not easy to deliquesce. The barium magnesium borate birefringent crystal can be grown by the Czochralski method, flux method or the method of spontaneous crystallization from a melt, and has larger birefringence (no?ne=0.077-0.229). The crystal has important applications in the fields of optics and communications, e.g. for fabricating the polarizing beam splitter prism.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: June 7, 2016
    Assignee: Technical Institute of Physics and Chemistry, Chinese Academy of Sciences
    Inventors: Rukang Li, Yingying Ma
  • Patent number: 9355579
    Abstract: Various embodiments of the present invention provide systems and methods for monitoring movement, and in particular to systems and methods for monitoring monitor targets, and more particularly, to systems and methods for using images in relation to tamper detection.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: May 31, 2016
    Assignee: BI Incorporated
    Inventors: James J. Buck, Jr., Joseph P. Newell, Cady Lynn Brooks
  • Patent number: 9354485
    Abstract: The present invention relates to frequency rulers. At least one embodiment includes a mode locked pump source operated at pulse repetition rate, and a pump output having a pump carrier envelope offset frequency. A nonlinear optical system outputs a frequency ruler spectrum comprising individual frequency modes. The frequency modes may be characterized by a frequency spacing which is an integer multiple of the repetition rate and by distinct ruler carrier envelope offset frequencies which exhibit at least one discontinuity across the frequency output. The ruler carrier envelope offset frequencies are substantially locked to the carrier envelope offset frequency of the pump laser. One preferred embodiment includes a frequency doubled, doubly resonant, non-degenerate OPO (DNOPO), a supercontinuum generation (SC) stage and at least one reference laser arranged downstream from a Tm fiber-based pump source. A plurality of beat signals generated therefrom provide for stabilization of the system.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: May 31, 2016
    Assignee: IMRA AMERICA, INC.
    Inventors: Martin E. Fermann, Ingmar Hartl
  • Patent number: 9260798
    Abstract: The present invention relates generally to the field of synthetic crystal, and more particularly, this invention relates to doped low-temperature phase barium metaborate single crystal, growth method and frequency-converter. Molten salt method was adopted. The single crystal completely overcome the shortcomings of BBO with strong deliquescence, almost no deliquescence; its frequency doubling effect and optical damage threshold has improved greatly compared with the BBO; its hardness increased significantly, the single crystal with Shore hardness of 101.3 and Mohs hardness of 6, however, BBO with Shore hardness of 71.2 and Mohs hardness of 4. From the UV-Vis region transmittance curves tests, the cut-off wavelength of the single crystal is 190 nm, wavelength of absorption onset is 205 nm. BBSAG is widely applied in the fields of laser and nonlinear optics, and in terms of frequency-converter of ultraviolet and deep-ultraviolet due to its excellent properties better than BBO.
    Type: Grant
    Filed: May 7, 2013
    Date of Patent: February 16, 2016
    Inventors: Changzhang Chen, Maochun Hong, Ding Li, Hainan Lin, Shicong Cai
  • Patent number: 9225144
    Abstract: Techniques and structure are disclosed for implementing a spatial walk-off compensation mechanism having an integral tilt function. In some embodiments, the mechanism may comprise a tilt-ball mount having an integrated walk-off compensation medium. In some embodiments, the mechanism may be configured to receive an output beam from a non-linear converter (e.g., optical parametric oscillator or OPO) implementing a non-linear medium comprising a bi-refringent material (e.g., zinc germanium phosphide, or ZnGeP2; cadmium silicon phosphide, or CdSiP2). In some embodiments, the walk-off compensation medium may comprise the same material and/or have the same cut as the non-linear medium. In some embodiments, the mechanism may be manually and/or mechanically adjusted/repositioned to reduce beam walk-off and/or to more precisely direct the beam. In some embodiments, the mechanism may be implemented in mid-infrared (MIR) applications. Numerous configurations and variations will be apparent in light of this disclosure.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: December 29, 2015
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Joseph M. Owen, Nathan E. Rines
  • Patent number: 9217910
    Abstract: The inorganic optical filter of the invention consists of a NdF3 single crystal. The optical element of the invention comprises a wavelength conversion element wherein incident light is subjected to wavelength conversion to twice the frequency by quasi-phase-matching using primary matching or tertiary matching, and emitted, and an inorganic optical filter situated in the optical path of light emitted from the wavelength conversion element, wherein the wavelength conversion element consists of a ferroelectric fluoride single crystal represented by Ba1?y(Mg1?xZnx)1+yF4 (where 0?x?1, and ?0.2?y?0.2), and the inorganic optical filter consists of a NdF3 single crystal.
    Type: Grant
    Filed: September 14, 2010
    Date of Patent: December 22, 2015
    Assignee: National Institute for Materials Science
    Inventors: Keiji Sumiya, Kiyoshi Shimamura, Garcia Villora
  • Patent number: 9188834
    Abstract: A wavelength conversion crystal including: a single nonlinear optical crystal which satisfies both of a first phase-matching condition and a second phase-matching condition, the first phase-matching condition being required for first wavelength conversion to convert a fundamental wave having a wavelength of 1064 nm into a second harmonic having a wavelength of 532 nm, and the second phase-matching condition being required for second wavelength conversion to convert the light having a wavelength of 532 nm into a fourth harmonic having a wavelength of 266 nm; and a first reflective face and a second reflective face for reflecting the light having a wavelength of 532 nm generated by the first wavelength conversion to supply it to the second wavelength conversion. This approach can efficiently generate a third or higher-order harmonic with a reliable and simple configuration.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: November 17, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shuichi Fujikawa, Susumu Konno, Keisuke Furuta, Tomotaka Katsura
  • Patent number: 9170152
    Abstract: Various embodiments for facilitating optical communications utilizing a apparatus are disclosed. One embodiment, among others, is an apparatus that comprises a dispersion element configured to transmit a beam through a plurality of optical paths in a spectral dispersion element to generate a spectrally dispersed beam. The apparatus further comprises a second-harmonic generation (SHG) element integrated into the dispersion element, the SHG element configured to generate second-harmonic light beam from the dispersed beam by splitting the dispersed beam into a plurality of beams, wherein the plurality of beams traverse a common axis. The apparatus further comprises a collimator configured to collimate the second-harmonic light beam over a predetermined path length and a phase decoder configured to receive the collimated beam and measure characteristics associated with the collimated beam.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: October 27, 2015
    Inventor: John Cabaniss
  • Patent number: 9127983
    Abstract: The resonant frequency of an optical micro-resonator may be controlled by “locking” an operating frequency/wavelength of the resonator using CMOS compatible electronic components.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: September 8, 2015
    Assignee: Sandia Corporation
    Inventors: Jonathan Albert Cox, Anthony L. Lentine
  • Patent number: 9069229
    Abstract: CdSiP2 crystals with sizes and optical quality suitable for use as nonlinear optical devices are disclosed, as well as NLO devices based thereupon. A method of growing the crystals by directional solidification from a stoichiometric melt is also disclosed. The disclosed NLO crystals have a higher nonlinear coefficient than prior art crystals that can be pumped by solid state lasers, and are particularly useful for frequency shifting 1.06 ?m, 1.55 ?m, and 2 ?m lasers to wavelengths between 2 ?m and 10 ?m. Due to the high thermal conductivity and low losses of the claimed CdSiP2 crystals, average output power can exceed 10 W without severe thermal lensing. A 6.45 ?m laser source for use as a medical laser scalpel is also disclosed, in which a CdSiP2 crystal is configured for non-critical phase matching, pumped by a 1064 nm Nd:YAG laser, and temperature-tuned to produce output at 6.45 ?m.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: June 30, 2015
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Peter G. Schunemann, Kevin T. Zawilski
  • Patent number: 9057929
    Abstract: The present invention relates to quinolinium-derived single crystals for use in nonlinear optics, which exhibit high molecular orientation and macroscopic optical nonlinearity. When the quinolinium-derived crystals according to the present invention are applied to THz wave light sources, higher THz wave generating efficiency may be obtained as compared with inorganic crystals or existing organic crystals.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: June 16, 2015
    Inventor: O-Pil Kwon