Plural Cavities Patents (Class 372/97)
  • Patent number: 10203285
    Abstract: A system includes a build-up cavity to locally increase the power of light beams within the build-up cavity, where the light beams interact with samples to sense a substance of interest. The build-up cavity is disposed within a main cavity that includes a gain material to amplify the light beams. A portion of the light beams oscillating in the build-up cavity propagators through the build-up cavity and functions as a feedback to control the linewidth of the light beams. The two cavities can function as two separate “filters” and light beams at wavelengths that propagate through both of these “filters” can be preferentially amplified. The combination of the build-up cavity and the main cavity can achieve high power and narrow linewidth for the light beams without complex electronics, thereby decreasing the size, weight, and power (SWaP) of the system.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: February 12, 2019
    Assignee: Massachusetts Institute of Technology
    Inventor: Shawn Redmond
  • Patent number: 10027417
    Abstract: Embodiments of the present invention provide an optical signal modulation apparatus and system. The optical signal modulation apparatus includes: a laser, where each of at least one first output end and at least one second output end of the laser is connected to an electro-absorption modulator (EAM), the laser is configured to generate at least two optical signals, where at least one of the optical signals is sent to at least one EAM by using the at least one first output end, and at least one of the optical signals is sent to at least one EAM by using the at least one second output end, and each EAM is configured to modulate a received electrical signal onto the received optical signal for outputting. The apparatus has a simple structure and less complex production.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: July 17, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yin Wang, Lei Gao, Yanbo Li
  • Patent number: 9692206
    Abstract: An external resonator type laser device has an optical element that forms an external resonator with a semiconductor device by selecting and reflecting light of a specific wavelength range from light outputted from the semiconductor device; a supporting member formed of a material having a larger coefficient of linear expansion than the optical element; and a first mount interposed between the optical element and the supporting member, formed of a material having a coefficient of linear expansion closer to that of the optical element compared with that of the supporting member. The optical element is adhered to the first mount. The first mount is adhered to the supporting member by an adhesive having a Shore hardness of less than or equal to 65.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: June 27, 2017
    Assignee: USHIO DENKI KABUSHIKI KAISHA
    Inventor: Tatsunori Shinmori
  • Patent number: 9529153
    Abstract: Apparatuses that include an input and output waveguide; and a nested resonator including at least an external loop and a nested loop positioned entirely inside the external loop, each loop independently having a length that supports a single resonant wavelength, the external loop further including: an input interface configured to couple energy between the input waveguide and the nested resonator, an output interface configured to couple energy between the nested resonator structure and the output waveguide, and an internal interface, the external loop and the nested loop configured to couple energy there between via the internal interface.
    Type: Grant
    Filed: May 1, 2015
    Date of Patent: December 27, 2016
    Assignee: Xyratex Technology Limited
    Inventor: Richard C. A. Pitwon
  • Patent number: 9341920
    Abstract: A wavelength convertor includes a beam splitter which splits a pulsed laser beam at wavelength ?p into a first higher power pulse portion and a second low power pulse portion. A fiber super continuum (SC) generator is coupled to receive the second pulse portion which converts the second pulse portion into a SC pulse having a bandwidth of >100 nm including a narrow spectral portion at wavelength ?s. An optical parametric amplifier (OPA) having a periodically poled material is included with domains arranged to provided quasi-phase matching for amplification at ?s and pumping at ?p. The arrival of the SC pulse portion at ?s and the first pulse portion at the OPA is synchronized to overlap in time. The OPA is seeded by the SC pulse portion at ?s and pumped by the first pulse portion to provide an amplified OPA seed at ?s.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: May 17, 2016
    Assignee: Gooch and Housego PLC
    Inventors: Murray Keith Reed, Robert C. Eckardt
  • Patent number: 9287987
    Abstract: An apparatus comprises an optical port; a first optical transmitter; a second optical transmitter; a partially reflective mirror positioned between the first optical transmitter, the second optical transmitter, and the optical port; and an optical rotator positioned between the partially reflective mirror and the first optical transmitter.
    Type: Grant
    Filed: December 1, 2012
    Date of Patent: March 15, 2016
    Assignee: Futurewei Technologies, Inc.
    Inventor: Ning Cheng
  • Patent number: 9281651
    Abstract: The resonator includes a lasing medium having a thickness, a first mirror disposed at a first end of the lasing medium and a second mirror disposed at a second end of the lasing medium. The first and second mirror cooperate to fold an intra-cavity laser beam along a plurality of paths through the lasing medium, thereby defining a boundary of a superfluous region within the resonator, wherein the intra-cavity laser beam does not pass through the superfluous region. The first mirror and the second mirror form a laser resonator for a parasitic laser mode, a portion of which is located within the superfluous region. A parasitic mode suppressor is located within the superfluous region of the resonator.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: March 8, 2016
    Assignee: GSI Group Corporation
    Inventors: Linh K. Nguyen, Jason W. Bethel, Giang B. Nguyen, Melvin J. Lima
  • Patent number: 9176313
    Abstract: A method for manipulating one or more particles comprising exposing the particle(s) to a beam of radiation that is able to lift and or impart an acceleration to the particle(s) to cause it to move in a curved trajectory.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: November 3, 2015
    Assignee: UNIVERSITY COURT OF THE UNIVERSITY OF ST ANDREWS
    Inventors: Kishan Dholakia, Michael Mazilu, Jorg Baumgartl
  • Patent number: 9140959
    Abstract: A fiber optic parametric amplifier that includes a resonating cavity. The resonating cavity includes linear fiber optic gain medium, with negative chromatic dispersion; and a nonlinear fiber optic gain medium with positive chromatic dispersion.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: September 22, 2015
    Assignees: Canon Kabushiki Kaisha, THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventors: Khanh Kieu, Thanh Nam Nguyen, Nasser Peyghambarian, Takefumi Ota
  • Patent number: 9131877
    Abstract: A laser apparatus that allows selection of a wavelength of output light from a plurality of options. The laser apparatus includes: a resonator made up from an output mirror and reflection means having a plurality of reflective surfaces fixed in position; a laser medium disposed on an optical axis inside the resonator; branch means branching an optical path of a light beam formed on the optical axis when light oscillates in the laser medium into a plurality of optical paths having an end at one reflective surface of the reflection means, the branch means forming a first optical path coinciding with the optical axis when located out of the optical axis, and forming a branch path by moving the light of the optical axis parallel when located on the optical axis.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: September 15, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Shigeru Ichihara
  • Patent number: 9130346
    Abstract: A device includes a first resonating cavity and a second resonating cavity. The first resonating cavity includes a first end surface and a second end surface. The first resonating cavity has a first free spectral range. The first free spectral range is a first frequency of a wavelength dependent ripple in a gain of the device that is a function of a first distance between the first end surface and the second end surface. The second resonating cavity includes a third end surface and a fourth end surface. A second distance between the third end surface and the fourth end surface is set such that an amplitude of the wavelength dependent ripple is reduced.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: September 8, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tomohiro Yamada
  • Patent number: 9106054
    Abstract: A laser beam combining and power scaling device and method. A first highly reflective mirror residing perpendicular to the first optical axis reflecting radiation emitted from the first laser head. A first Q-switch in alignment with the first optical axis interposed between the first highly reflective mirror and the first laser head. A second highly reflective mirror residing perpendicular to the second optical axis reflecting radiation emitted from the second laser head. The second Q-switch in alignment with the second optical axis is interposed between the second highly reflective mirror and the first laser head. A third optical axis is coincident with the first optical axis. A third highly reflective mirror residing perpendicular to the third optical axis in alignment therewith. The third optical axis may include a third diode pumped laser head and Q-switch. A beam splitter resides at the intersection of the axes.
    Type: Grant
    Filed: February 23, 2014
    Date of Patent: August 11, 2015
    Assignee: LEE LASER, INC.
    Inventors: Dwight Kimberlin, Donald Bishop
  • Patent number: 9099214
    Abstract: A method includes providing a capability to control divergence of a coherent light beam having an axially symmetrical distribution of intensity thereof through an optical divergence controller, and directing an output of the optical divergence controller related to the controlled divergence of the coherent light beam onto a glass prism. The glass prism includes a planar shape onto which a pyramidal structure is formed. The method also includes controlling a distance between maxima of an output light field of the glass prism and intensity thereof through controlling the divergence of the coherent light beam through the optical divergence controller and/or varying a distance between the optical divergence controller and the glass prism, and utilizing the output light field of the glass prism in controlling microparticles in a microtechnology or a nanotechnology application.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: August 4, 2015
    Assignee: KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY
    Inventors: Turki Saud Mohammed Al-Saud, Soliman Hammad Al-Khowaiter, Muhanna Kamal Al-Muhanna, Sergey Solonevich, Anatol Ryzhevich, Nikolai Kazak
  • Patent number: 9086609
    Abstract: Nondegenerate mirrorless four-wave mixing oscillation with frequency tunability is proposed in nonlinear waveguide of the third-order nonlinearity such as silicon waveguide) by using two different spatial modes. As low as ˜2 W threshold power is obtained in several centimeters long waveguide. In one aspect, a method includes propagating a first wave along an axis of a multimode waveguide in a forward direction, the first optical wave having a first frequency; propagating a second wave along the axis of the multimode waveguide in a backward direction, the second wave having a second frequency; the waveguide configured to support multiple modes, including at least a fundamental mode and a second mode; and the propagating the first wave occurs at a same time as the propagating the second wave to generate a third wave in the forward direction having a third frequency and fourth wave in the backward direction having a fourth frequency.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: July 21, 2015
    Assignee: University of Southern California
    Inventors: Yan Yan, Lin Zhang, Alan E. Willner
  • Patent number: 8964803
    Abstract: A light source apparatus includes a laser oscillator equipped with a first optical resonator, a plurality of second optical resonators including input portions respectively connected in parallel to the first optical resonator, a plurality of light extraction units configured to extract a light beam from an output portion of each second optical resonator, and a light multiplexing unit configured to multiplex the light beam extracted from each light extraction unit, wherein the light source apparatus causes the light multiplexing unit to output a multiplexed light beam passed through the plurality of second optical resonators, an optical member having refractive index dispersion and an optical amplification medium are disposed in each of the plurality of second optical resonators, and the optical amplification media of the plurality of second optical resonators are different from each other in maximum gain wavelength.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: February 24, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomohiro Yamada, Kentaro Furusawa
  • Patent number: 8964799
    Abstract: The present invention relates to a Q-switching-induced gain-switched erbium pulse laser system, capable of generating erbium laser pulses within the 2.5 ?m to 3.0 ?m wavelength region, by means of Q-switching operation at 1.6 ?m. At first, an Er3+-doped gain medium is pumped and Q-switched at the wavelength region from 1.58 ?m to 1.62 ?m, so that a Q-switched pulse is formed from the Er3+-doped gain medium. The Q-switched pulse results in an instant positive population inversion between the levels 4I11/2 and 4I13/2 of the Er3+-doped gain medium, followed by a gain-switched laser pulse at the wavelength region from 2.5 ?m to 3.0 ?m.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: February 24, 2015
    Assignee: National Cheng Kung University
    Inventor: Tzong-Yow Tsai
  • Patent number: 8929408
    Abstract: Apparatus, systems, and methods of generating multi combs can be used in a variety of applications. In various embodiments, an etalon can be disposed in the laser cavity of a mode-locked laser to adjust frequency combs. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: January 6, 2015
    Assignee: STC.UNM
    Inventors: Jean-Claude Diels, Ladan Arissian, Koji Masuda
  • Patent number: 8891576
    Abstract: Unidirectionality of lasers is enhanced by forming one or more etched gaps (78, 80) in the laser cavity. The gaps may be provided in any segment of a laser, such as any leg of a ring laser, or in one leg (62) of a V-shaped laser (60). A Brewster angle facet at the distal end of a photonic device coupled to the laser reduces back-reflection into the laser cavity. A distributed Bragg reflector is used at the output of a laser to enhance the side-mode suppression ratio of the laser.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: November 18, 2014
    Assignee: Binoptics Corporation
    Inventors: Alex A. Behfar, Alfred T. Schremer, Jr., Cristian B. Stagarescu
  • Patent number: 8867576
    Abstract: A laser system having a cavity formed by at least two sub-cavities and a mechanism for optically pumping a first of the at least two sub-cavities. In the system, the optical pumping mechanism is arranged in such away to not reach a laser emission threshold of the first sub-cavity, the first sub-cavity (2) comprising a device for generating a short pulse, a second sub-cavity (3) comprising an external triggering device. The first and second sub-cavities are coupled such that the triggering of the second sub-cavity has at least two such laser systems, to a light emission system with a wide spectral band, comprising such a laser system and a mechanism for generating non-linear optical effects inserted into the second sub-cavity, and to a light generator with a wide spectral band, comprising such a laser generator having at least one laser system provided with a mechanism for generating non-linear optical effects inserted into the second sub-cavity.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: October 21, 2014
    Assignees: Centre National de la Recherche Scientifique-CNRS, Compagnie Industrielle des Lasers Cilas (CILAS)
    Inventors: Vincent Couderc, Philippe Paul Leproux, Florent Doutre, Dominique Pagnoux
  • Patent number: 8831047
    Abstract: The multi-wavelength laser is a ring laser source working at room temperature. The laser has an inner cavity disposed in an outer cavity. A pair of circulators disposed in the inner cavity is configured to assure counter-propagation of light between the inner cavity and the outer cavity. A gain-clamped semiconductor optical amplifier (GC-SOA) is formed by combining a SOA and a Fiber Fabry-Perot Tunable Filter (FFP-TF) with the circulator pair. This configuration in the laser cavity results in an improvement in terms of transient gain excursions by applying an optical feedback. This attribute of the GC-SOA enables realizing a stable multi-wavelength laser source.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: September 9, 2014
    Assignee: King Fahd University of Petroleum and Minerals
    Inventor: Khurram Karim Qureshi
  • Patent number: 8824518
    Abstract: A the vertical-cavity surface-emitting laser includes a stripe-shaped active medium (10) having an emission maximum at a first wavelength (?1), wherein a first reflector (18) is arranged below the stripe-shaped active medium (10) and a second reflector (20) is arranged above the stripe-shaped active medium (10), with the first reflector (18) facing the second reflector (20), wherein the first reflector (18) and a second reflector (20) have a reflectivity maximum in the region of the first wavelength (?1), wherein a third reflector (12) and a fourth reflector (13) are each arranged on a side above or next to the stripe-shaped active medium (10), wherein the third reflector (12) faces the fourth reflector (13), and wherein the third reflector (12) and the fourth reflector (13) have a reflectivity maximum in the region of a second wavelength (?2), wherein the first wavelength (?1) is greater than the second wavelength (?2).
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: September 2, 2014
    Assignee: Forschungsverbund Berlin e.V.
    Inventors: Günther Tränkle, Joachim Piprek, Hans Wenzel, Götz Erbert, Markus Weyers, Andrea Knigge
  • Patent number: 8818208
    Abstract: A laser mux assembly generally includes a back reflector selectively coupled to one of the input ports of an optical multiplexer, such as an arrayed waveguide grating (AWG), and at least one laser emitter coupled to an output port. The laser emitter may include a gain region that emits light across a plurality of wavelengths including, for example, channel wavelengths in an optical communication system. The emitted light is coupled into the output port and the AWG or optical multiplexer filters the emitted light from the laser emitter at different channel wavelengths. The back reflector reflects the filtered light at the respective channel wavelength such that lasing occurs at the channel wavelength(s) of the reflected, filtered light. The laser mux assembly may be used, for example, in a tunable transmitter, to generate an optical signal at a selected channel wavelength.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: August 26, 2014
    Assignee: Applied Optoelectronics, Inc.
    Inventors: Jun Zheng, Stefan J. Murry
  • Patent number: 8817831
    Abstract: A method and apparatus for spatially separating beams with different wavelengths is presented. The system includes: a light source (i.e. a laser with multiple harmonic output beams) with multiple wavelengths emitted along a single beam path or very nearly collinear beam paths, a path which connects the light source to a wavelength dependent beam separator, and a second path for blocking unwanted output wavelengths which connects the beam separation region to the laser output.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: August 26, 2014
    Assignee: Photonics Industries Int'l.
    Inventors: Matthew Terraciano, Yusong Yin, Andrea Burzo
  • Patent number: 8803027
    Abstract: A thin beam laser crystallization apparatus for selectively melting a film deposited on a substrate is disclosed having a laser source producing a pulsed laser output beam, the source having an oscillator comprising a convex reflector and a piano output coupler; and an optical arrangement focusing the beam in a first axis and spatially expanding the beam in a second axis to produce a line beam for interaction with the film.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: August 12, 2014
    Assignee: Cymer, LLC
    Inventor: Thomas Hofmann
  • Patent number: 8798105
    Abstract: A compact, lightweight, laser target designator uses a TIR bounce geometry to place an end-pumped gain element functionally in the center of the resonator path, thereby allowing the resonator path to be terminated by a pair of crossed Porro prisms, so that the designator produces a high quality beam that is insensitive to alignment and temperature, and is low in manufacturing cost. Some embodiments fold the Porro legs of the resonator path back toward the gain element for compactness. Embodiments use a single gain element as both an oscillator gain element with TIR and as an output amplifier gain element without TIR. Various embodiments use block optical elements in a planar layout on a standard support medium such as aluminum to facilitate automated manufacturing.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: August 5, 2014
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: John C. McCarthy, Katherine J. Snell, Christopher A. Miller
  • Publication number: 20140198377
    Abstract: A single mode semiconductor laser includes a first optical resonator, which is formed by a total reflection surface and a partial reflection surface. Light emitted from the partial reflection surface of the single mode semiconductor laser enters a fiber Bragg grating, which includes a diffraction grating formed therein. The diffraction grating forms a second optical resonator in combination with the total reflection surface of the single mode semiconductor laser. A fiber amplifier amplifies a laser beam emitted from the fiber Bragg grating.
    Type: Application
    Filed: December 9, 2013
    Publication date: July 17, 2014
    Applicant: OMRON CORPORATION
    Inventors: Masao YOSHIOKA, Takuya TOGAWA
  • Patent number: 8743453
    Abstract: An apparatus for producing coherent, pulsed ultraviolet light with pulse durations that range between 1 ps and 1 ?s includes one or more source lasers in the visible or near-infrared frequency range. The apparatus also includes one or more FC stages, at least one of the one or more FC stages including a nonlinear FC device and one or more optical elements. The optical elements include a reflector, a focusing element, a polarization-controlling optic, a wavelength separator, or a fiber optic component. The FC device includes a huntite-type aluminum double borate nonlinear optical material configured to produce FC light having a wavelength between 190 and 350 nm and a composition given by RAl3B4O12, where R comprises one or a plurality of elements {Sc, La, Y, Lu}. The nonlinear optical material is characterized by an optical transmission greater than 70% over the wavelength range of 190 to 350 nm.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: June 3, 2014
    Assignee: Deep Photonics Corporation
    Inventors: Theodore Alekel, David A. Dutton, David H. Foster, Joseph G. LaChapelle, Michael J. Munroe
  • Patent number: 8724671
    Abstract: A system for generating multiple simultaneous laser wavelengths, said system comprising: a pulsed slave laser comprising a non-linear electro-optic crystal optically coupled to a lasing crystal in a ring cavity configuration, said non-linear electro-optic crystal configured to adjust an optical path length of said ring cavity in response to an applied voltage potential; an energy pump configured to initiate a pulse cycle in said pulsed slave laser in response to a trigger; a cavity control circuit configured to apply said voltage potential to said non-linear electro-optic crystal to generate a cavity resonance condition associated with said adjusted optical path length, said cavity control circuit further configured to provide said trigger to said energy pump in response to a detection of said cavity resonance condition; and one or more seed lasers configured to inject a single frequency laser beam into said pulsed slave laser.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: May 13, 2014
    Assignee: Southwest Research Institute
    Inventor: Thomas Z. Moore
  • Patent number: 8711367
    Abstract: A position-measuring device, for ascertaining the position of two objects which are disposed in a manner allowing movement relative to each other in at least one measuring direction, includes a light source, as well as a splitting device by which a light beam, provided by the light source, is split into two or more partial beams of rays. The partial beams of rays traverse at least two partial-beam paths. Interfering partial beams of rays from the partial-beam paths strike a plurality of opto-electronic detector elements, so that displacement-dependent position signals are ascertainable via the detector elements. The light source takes the form of a semiconductor laser having a fiber-grating feedback device.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: April 29, 2014
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventor: Markus Meissner
  • Patent number: 8693511
    Abstract: A laser beam combining and power scaling device and method. A first highly reflective mirror residing perpendicular to the first optical axis reflecting radiation emitted from the first laser head. A first Q-switch in alignment with the first optical axis interposed between the first highly reflective mirror and the first laser head. A second highly reflective mirror residing perpendicular to the second optical axis reflecting radiation emitted from the second laser head. The second Q-switch in alignment with the second optical axis is interposed between the second highly reflective mirror and the first laser head. A third optical axis is coincident with the first optical axis. A third highly reflective mirror residing perpendicular to the third optical axis in alignment therewith. The third optical axis may include a third diode pumped laser head and Q-switch. A beam splitter resides at the intersection of the axes.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: April 8, 2014
    Assignee: Lee Laser, Inc.
    Inventors: Dwight Kimberlin, Donald Bishop
  • Patent number: 8693517
    Abstract: A semiconductor laser using an external resonator. A laser diode chip emits a laser beam in a horizontal direction parallel to the bottom plane of a package, and the travel path of the laser beam is changed into a vertical direction by a reflective mirror next to a laser beam-emitting surface of the laser diode chip. As a result, the beam arrangement of the external cavity is available on a plane parallel to the bottom plane of the package through a lens installed on the vertical travel path of the laser beam. Consequently, the beam is easily arranged. Furthermore, an additional reflective mirror is installed above the lens which changes the vertical travel path into a horizontal travel path, which allows the beam traveling parallel to the bottom plane to be easily arranged through the lens. The production of the package can also be enabled in the configuration where various optical tools are arranged on the bottom of the package.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: April 8, 2014
    Inventor: Jeong Soo Kim
  • Patent number: 8687665
    Abstract: Semiconductor light-emitting devices; methods of forming semi-conductor light emitting devices, and methods of operating semi-conductor light emitting devices are provided. A semiconductor light-emitting device includes a first laser section monolithically integrated with a second laser section on a common substrate. Each laser section has a phase section, a gain section and at least one distributed Bragg reflector (DBR) structure. The first laser section and the second laser section are optically coupled to permit optical feedback therebetween. Each phase section is configured to independently tune a respective one of the first laser section and second laser section relative to each other.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: April 1, 2014
    Assignee: Sandia Corporation
    Inventors: Anna Tauke-Pedretti, Erik J. Skogen, Gregory A. Vawter, Weng W. Chow
  • Patent number: 8675696
    Abstract: Systems and methods are disclosed that provide a direct indication of the presence and concentration of an analyte within the external cavity of a laser device that employ the compliance voltage across the laser device. The systems can provide stabilization of the laser wavelength. The systems and methods can obviate the need for an external optical detector, an external gas cell, or other sensing region and reduce the complexity and size of the sensing configuration.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: March 18, 2014
    Assignee: Battelle Memorial Institute
    Inventors: Matthew S. Taubman, Mark C. Phillips
  • Patent number: 8675709
    Abstract: A hybrid CW MOPA includes an OPS-laser resonator delivering radiation in a plurality of longitudinal lasing-modes or wavelengths. The multiple longitudinal mode output is amplified in a fiber-amplifier. Amplified lasing-modes from the fiber-amplifier are frequency-converted by an optically nonlinear crystal in a ring-resonator having the same length as the laser resonator, such that the ring-resonator is resonant for all of the amplified lasing-modes.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: March 18, 2014
    Assignee: Coherent, Inc.
    Inventors: Sergei Govorkov, Andrei Starodoumov, Arnaud Lepert
  • Patent number: 8644359
    Abstract: A system comprising a multiplicity of quantum dot lasers disposed on a back surface of a control circuit, wherein each of the quantum dot lasers produces coherent light; a multiplicity of micro-lens collimators, each micro-lens collimator secured to a corresponding quantum dot laser, where light generated by the quantum dot laser passes through the fiber and exits at the tip; a diffraction grating, wherein the light from each of the micro-lens collimators is directed to the diffraction grating; and wherein the coherent light leaving the diffraction grating is a high powered optical light.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: February 4, 2014
    Assignee: Verizon Patent and Licensing Inc.
    Inventor: David Zhi Chen
  • Patent number: 8630327
    Abstract: A system for emitting a polychromatic light, has a laser cavity device used to optically pump the laser cavity emit radiation according to at least one excitation wavelength and light guiding mechanism arranged in such a way as to supply a polychromatic light to an outlet in the event of excitation by the radiation in a non-linear interaction regime. In the system, the guiding mechanism is arranged inside a cavity formed by at least two sub-cavities, a first sub-cavity forming the laser cavity and a second sub-cavity comprising the guiding mechanism, the first and second sub-cavities being coupled.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: January 14, 2014
    Assignees: Centre National de la Recherche Scientifique-CNRS, Compagnie Industrielle des Lasers Cilas (CILAS)
    Inventors: Vincent Couderc, Philippe Paul Leproux, Florent Doutre, Dominique Pagnoux
  • Patent number: 8624269
    Abstract: A radiation-emitting thin film semiconductor chip is herein described which comprises a first region with a first active zone, a second region, separated laterally from the first region by a space, with a second active zone which extends parallel to the first active zone in a different plane, and a compensating layer, which is located in the second region at the level of the first active zone, the compensating layer not containing any semiconductor material.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: January 7, 2014
    Assignee: OSRAM Opto Semiconductors GmbH
    Inventor: Ralph Wirth
  • Patent number: 8615029
    Abstract: A laser diode is configured with a substrate delimited by opposite AR and HR reflectors and a gain region. The gain region bridges the portions of the respective AR and HR reflectors and is configured with a main resonant cavity and at least one side resonant cavity. The main resonant cavity spans between the portions of the respective reflectors, and at least one additional resonant cavity extends adjacent to the main resonator cavity. The gain region is configured so that stimulated emission is generated only in the main resonant cavity. Accordingly, the laser diode is operative to radiate a high-power output beam emitted through the portion of the AR reflector which is dimensioned to shape the output beam with the desired near-field.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: December 24, 2013
    Assignee: IPG Photonics Corporation
    Inventors: Alexander Ovtchinnikov, Alexey Komissarov, Valentin P. Gapontsev, Pavel Trubenko
  • Patent number: 8605355
    Abstract: Presented herein is a multipass optical amplifier including a thin-disk gain medium, a first reflective element optically coupled to the gain medium, a first parabolic reflector in optical communication with the gain medium and the first reflective element, a second parabolic reflector in optical communication with the first parabolic reflector, and a second reflective element in optical communication with the second parabolic reflector. The amplifier also includes a pump source, a signal beam source, and a chamber having first and second regions configured about the multipass optical amplifier with a port that extracts gas from the chamber. The first region includes the first parabolic reflector, the gain medium, and the first reflective element. The second region of the chamber includes the second reflective element and the second parabolic reflector. An input optic propagates the signal beam through the amplifier to impinge the gain medium multiple times for gain.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: December 10, 2013
    Assignee: Applied Energetics
    Inventors: Paul B. Lundquist, Samvel Sarkisyan, Eric A. Wilson, Raymond M. Copenhaver, Hector Martin, Steven McCahon
  • Patent number: 8599896
    Abstract: A laser amplifier system is provided which comprises a resonator with optical resonator elements which determine a course of a resonator radiation field which propagates along an optical axis and at least one laser-active medium (LM). The resonator is designed as a split resonator and has a first resonator section which extends from a first virtual plane of separation and a second resonator section which extends from a second virtual plane of separation. The resonator sections are dimensioned optically such that the resonator radiation field has radiation field states corresponding to the same resonator modes in each of the virtual planes of separation. An amplifying unit optically independent of the resonator is arranged between the first and the second virtual planes of separation. The amplifying unit comprises the at least one laser-active medium and couples the radiation field states in a neutral manner with respect to the resonator modes.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: December 3, 2013
    Assignee: Deutsches Zentrum fuer Luft- und Raumfahrt e.V.
    Inventors: Adolf Giesen, Jens Mende, Gerhard Spindler, Jochen Speiser
  • Patent number: 8571084
    Abstract: The present invention is directed to a semiconductor laser device comprising a first resonator section for resonating an optical resonator signal for providing an optical output signal at an output of said laser device, wherein said first resonator section is arranged for selectively resonating at a plurality of discrete output wavelengths, and wherein said laser device further comprises a second resonator section operatively connected to said first resonator section, said second resonator section being arranged for providing an optical feedback signal at a feedback wavelength to said first resonator section for locking said first resonator section into resonating at a selected output wavelength of said discrete output wavelengths, which selected output wavelength corresponds to said feedback wavelength for providing said optical output signal.
    Type: Grant
    Filed: August 1, 2008
    Date of Patent: October 29, 2013
    Assignee: Technische Universiteit Eindhoven
    Inventors: Boudewijn Docter, Stefano Beri, Meint Koert Smit, Fouad Karouta, Xaverius Jacques Maria Leijtens
  • Patent number: 8537872
    Abstract: A light emitting device includes first and second cladding layers and an active layer therebetween including first and second side surfaces and first and second gain regions, a second side reflectance is higher than a first side reflectance, a first end surface part of the first gain region overlaps a second end surface part of the second gain region in an overlapping plane, the first gain region obliquely extends from the first end surface to a third end surface, the second gain region obliquely extends from the second end surface to a fourth end surface, a first center line connecting the centers of the first and third end surfaces and a second center line connecting the centers of the second and fourth end surfaces intersect, and the overlapping plane is shifted from the intersection point toward the first side surface.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: September 17, 2013
    Assignee: Seiko Epson Corporation
    Inventor: Masamitsu Mochizuki
  • Patent number: 8509272
    Abstract: A laser beam combining and power scaling device and method. A first highly reflective mirror residing perpendicular to the first optical axis reflecting radiation emitted from the first laser head. A first Q-switch in alignment with the first optical axis interposed between the first highly reflective mirror and the first laser head. A second highly reflective mirror residing perpendicular to the second optical axis reflecting radiation emitted from the second laser head. The second Q-switch in alignment with the second optical axis is interposed between the second highly reflective mirror and the first laser head. A third optical axis is coincident with the first optical axis. A third highly reflective mirror residing perpendicular to the third optical axis in alignment therewith. The third optical axis may include a third diode pumped laser head and Q-switch. A beam splitter resides at the intersection of the axes.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: August 13, 2013
    Assignee: Lee Laser, Inc.
    Inventors: Dwight Kimberlin, Donald Bishop
  • Patent number: 8494024
    Abstract: A monoblock laser cavity incorporates optical components for a short-pulse laser. These optical components are ‘locked’ into alignment forming an optical laser cavity for flash lamp or diode laser pumping. The optical laser cavity does not need optical alignment after it is fabricated, increasing the brightness of the monoblock laser.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: July 23, 2013
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: John E. Nettleton, Lew Goldberg, Dallas N. Barr
  • Patent number: 8494023
    Abstract: A composite optical waveguide 1 includes a first optical waveguide 9 comprising a silica-based core and a second optical waveguide 11 comprising an Si-based core. The second optical waveguide 11 is joined to the first optical waveguide 9. The length of the first optical waveguide 9 corresponds to a permissible propagation loss of the second optical waveguide 11. The second optical waveguide 11 includes a sharply curved portion 13 having a radius smaller than the minimum bend radius of the first optical waveguide 9.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: July 23, 2013
    Assignee: NEC Corporation
    Inventors: Hiroyuki Yamazaki, Hirohito Yamada
  • Patent number: 8488638
    Abstract: A compact solid state laser that generates multiple wavelengths and multiple beams that are parallel, i.e., bore-sighted relative to each other, is disclosed. Each of the multiple laser beams can be at a different wavelength, pulse energy, pulse length, repetition rate and average power. Each of the laser beams can be turned on or off independently. The laser is comprised of an optically segmented gain section, common laser resonator with common surface segmented cavity mirrors, optically segmented pump laser, and different intra-cavity elements in each laser segment.
    Type: Grant
    Filed: January 3, 2013
    Date of Patent: July 16, 2013
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventor: Lew Goldberg
  • Patent number: 8463088
    Abstract: The multi-channel optical device includes multiple laser cavities that each reflects a different light channel back and forth between reflective components. One of the reflective components is common to all of the laser cavities in that the common reflective component receives the channels from each of the laser cavities and reflects the received channels. The laser cavities also share a multiplexer that receives the channels reflected by the common reflective device and demultiplexes the channels into demultiplexed channels. A portion of the reflective components are partial return devices that each receives one of the demultiplexed channels. Each of the partial return devices transmits a portion of the demultiplexed channel received by that partial return device. The transmitted portion of the demultiplexed channel exits the laser cavity. Additionally, each of the partial return devices reflects a portion of the demultiplexed channel receive by that partial return device.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: June 11, 2013
    Assignee: Kotura, Inc.
    Inventors: Mehdi Asghari, Dazeng Feng
  • Patent number: 8457171
    Abstract: A laser amplifier arrangement includes an optical pump source and an axially arranged laser oscillator-amplifier configuration pumped by the pump radiation. The laser oscillator-amplifier configuration includes a laser oscillator excitable by a portion of the pump radiation to emit a laser beam, and a laser amplifier that amplifies the laser beam using the pump radiation. The laser oscillator and laser amplifier are arranged in a substantially coaxial or collinear manner relative to a longitudinal axis of the laser oscillator-amplifier configuration. The pump source includes a first beam source for producing a first pump radiation to pump the laser oscillator, a second beam source for producing a second pump radiation for the laser amplifier, and a pump radiation conducting device, by means of which both the first and the second pump radiation can be lead into the laser oscillator-amplifier configuration substantially in the direction of the longitudinal axis for longitudinal pumping.
    Type: Grant
    Filed: November 26, 2009
    Date of Patent: June 4, 2013
    Assignee: EADS Deutschland GmbH
    Inventors: Peter Peuser, Willi Platz
  • Patent number: 8441718
    Abstract: Fiber-laser light is Raman shifted to eye-safer wavelengths prior to spectral beam combination, enabling a high-power, eye-safer wavelength directed-energy (DE) system. The output of Ytterbium fiber lasers is not used directly for spectral beam combining. Rather, the power from the Yb fiber lasers is Raman-shifted to longer wavelengths, and these wavelengths are then spectrally beam combined. Raman shifting is most readily accomplished with a “cascaded Raman converter,” in which a series of nested fiber cavities is formed using fiber Bragg gratings.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: May 14, 2013
    Assignee: Lockheed Martin Corporation
    Inventor: Roy D. Mead
  • Patent number: 8385382
    Abstract: A compact solid state laser that generates multiple wavelengths and multiple beams that are parallel, i.e., bore-sighted relative to each other, is disclosed. Each of the multiple laser beams can be at a different wavelength, pulse energy, pulse length, repetition rate and average power. Each of the laser beams can be turned on or off independently. The laser is comprised of an optically segmented gain section, common laser resonator with common surface segmented cavity mirrors, optically segmented pump laser, and different intra-cavity elements in each laser segment.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: February 26, 2013
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventor: Lew Goldberg