Waveguide Patents (Class 372/64)
  • Patent number: 10483710
    Abstract: Systems and techniques for multilayer electrode assemblies are generally described. In some examples, a multilayer electrode assembly may comprise a first dielectric material. In some examples, the first dielectric material may be shaped so as to form a channel defined by an interior surface. In various examples the multilayer electrode assemblies may comprise a first metal layer disposed adjacent to a first portion of the exterior surface of the first dielectric material. In various further examples, the multilayer electrode assemblies may comprise a second metal layer disposed adjacent to a second portion of the exterior surface of the first dielectric material. In some examples, the first metal layer may be disposed in a first spaced relationship with the second metal layer. In various examples, a substantially uniform electric field may be generated in the channel of the first dielectric material when a voltage is applied to the multilayer electrode assembly.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: November 19, 2019
    Assignee: AUROMA TECHNOLOGIES, CO., LLC
    Inventors: Michael W. Murray, Thomas Wolowiec
  • Patent number: 10186825
    Abstract: A microwave excited gas slab laser comprising a waveguide wherein the electrodes are covered with multi-layered stripes either forming a photonic band-gap or having a refractive index lower than 1.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: January 22, 2019
    Assignee: Soreq Nuclear Research Center
    Inventors: Yoav Sintov, Zeev Zalevski
  • Patent number: 10116112
    Abstract: In a laser oscillator, a pair of electrodes is disposed in a housing into which a gas is sealed, a waveguide is formed by the pair of electrodes, and a laser beam is configured to be extracted from an end of the housing. The laser oscillator includes a mirror holder attached to an end of the electrode, the end serving as an end of the waveguide, and a reflection mirror attached to the mirror holder and reflecting a laser beam generated in the waveguide. In the laser oscillator, a passage through which a cooling medium is passed is formed inside each of the pair of electrodes.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: October 30, 2018
    Assignee: VIA MECHANICS, LTD.
    Inventors: Nobuyoshi Ohtani, Goichi Ohmae
  • Patent number: 10038299
    Abstract: A light source device includes a plurality of light source units, a plurality of first heat processing units, a second heat processing unit, a plurality of thermal connectors, a light processing unit, and a plurality of optical connectors. The plurality of thermal connectors make the plurality of first heat processing units and the second heat processing unit attachable to and detachable from each other, and thermally connect the plurality of first heat processing units and the second heat processing unit. The light processing unit processes the light output from the plurality of light source units. The plurality of optical connectors make the plurality of light source units and the light processing unit attachable to and detachable from each other, and optically connect the plurality of light source units and the light processing unit.
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: July 31, 2018
    Assignee: OLYMPUS CORPORATION
    Inventors: Masahiro Nishio, Takeshi Ito
  • Patent number: 9507088
    Abstract: A planar waveguide (PWG) having a first end for coupling to a light pump and a second end opposite to the first end and including: a first cladding layer; a uniformly doped core layer having the first cladding layer on one side, wherein the core layer is tapered having a smaller thickness at the first end and a larger thickness at the second end; and a second cladding layer thinner than the first cladding layer, coated on another side of the core layer opposite to said one side of the core layer. The first cladding layer may also be tapered along the length of the PWG having a larger thickness at the first end and a smaller thickness at the second end with a taper angle substantially opposite that of the core layer to form the PWG with a substantially uniform overall thickness along the length.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: November 29, 2016
    Assignee: Raytheon Company
    Inventor: David M. Filgas
  • Patent number: 9231362
    Abstract: The laser resonator includes a first resonator wall, a second resonator wall that is substantially parallel to the first resonator wall and is separated from the first resonator wall in a first transverse direction thereby defining a gap having a gap width between the first and second resonator walls, and at least two laser cavity mirrors. The laser cavity mirrors are arranged to allow an intra-cavity laser beam to reflect from the output coupling mirror thereby forming a first beam spot on the output coupling mirror. The first curved mirror has a radius of curvature such that the reflection of the intra-cavity laser beam from the first curved mirror causes the first beam spot on the output coupling mirror to have a substantially symmetric shape.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: January 5, 2016
    Assignee: Synrad, Inc.
    Inventor: Linh K. Nguyen
  • Publication number: 20150139262
    Abstract: A coherent extreme ultraviolet (XUV) radiation source is provided that includes a non-linear optical conversion material solid substrate disposed for nonlinear conversion of infrared (IR) coherent radiation into XUV coherent radiation, where the solid substrate includes an IR coherent radiation region, and an XUV coherent radiation waveguide region, where the IR coherent radiation region is optically coupled to the XUV coherent radiation waveguide region, where the XUV coherent radiation converted from the IR coherent radiation by the non-linear optical conversion material propagates in and outputs from the XUV coherent radiation waveguide region.
    Type: Application
    Filed: November 18, 2014
    Publication date: May 21, 2015
    Inventors: David Reis, Philip Howard Bucksbaum
  • Patent number: 9036667
    Abstract: A high power fiber laser system emitting a substantially diffraction limited beam with a Gaussian intensity profile includes a single mode (“SM”) neodymium fiber pump source outputting a SM pump light; a seed laser operative to emit a SM signal light at a wavelength greater than that of the pump light; a SM DWM receiving and multiplexing the SM pump and signal lights. The disclosed system further includes a booster fiber amplifier which is configured with a frustoconically-shaped ytterbium (“Yb”) doped core receiving the pump and signal lights and configured with a small diameter input end which supports only a SM and a large diameter output end which is capable of supporting the SM and high order modes (:HOM”). The booster further has a cladding surrounding and coextending with the core, the core being configured for having intensity profiles of respective SMs of pump and signal lights overlap one another so that an overlap integral substantially equals to one (1) along an entire length of the core.
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: May 19, 2015
    Assignee: IPG Photonics Corporation
    Inventors: Valentin Gapontsev, Igor Samartsev
  • Patent number: 9020004
    Abstract: A ring resonator is connected to an optical amplifier. The ring resonator and optical amplifier are contained within the optical path of an optical resonator formed by a first and second reflector. The optical coupler branches part of the light conducting from the optical amplifier to the ring resonator within the optical resonator off to an output optical waveguide.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: April 28, 2015
    Assignee: Fujitsu Limited
    Inventor: Seokhwan Jeong
  • Patent number: 8995494
    Abstract: Techniques and architecture are disclosed for providing a laser system. In one specific example embodiment, the system includes a thulium-doped fiber laser coupled by silica glass fiber to a remote optical converter (ROC) including a Ho:YAG laser and, optionally, an optical parametric oscillator (OPO) utilizing zinc germanium phosphide (ZnGeP2; ZGP) or orientation-patterned gallium arsenide (OPGaAs). The fiber laser may emit a low-peak-power, continuous wave pump signal that pumps the Ho:YAG laser, which in turn emits a higher-peak-power, pulsed signal. When included, the OPO can be used to convert the resultant, pulsed signal to a longer wavelength (e.g., about 2-5 ?m, or greater). In some cases, distributed architecture and reduced weight/bulk may be realized while eliminating the need to actively cool the ROC for operation, for example, over a broad temperature range (e.g., ?55-125° C.). Also, methods of preparing high-peak-power, pulsed signals using such systems are disclosed.
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: March 31, 2015
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Leonard A Pomeranz, Joseph M Owen, Michael J. Shaw, David P. Kelly, Philip R. Staver, Peter A. Budni, John C. Wikman
  • Patent number: 8916849
    Abstract: An optoelectronic semiconductor chip, the latter includes a carrier and a semiconductor layer sequence grown on the carrier. The semiconductor layer sequence is based on a nitride-compound semiconductor material and contains at least one active zone for generating electromagnetic radiation and at least one waveguide layer, which indirectly or directly adjoins the active zone. A waveguide being formed. In addition, the semiconductor layer sequence includes a p-cladding layer adjoining the waveguide layer on a p-doped side and/or an n-cladding layer on an n-doped side of the active zone. The waveguide layer indirectly or directly adjoins the cladding layer. An effective refractive index of a mode guided in the waveguide is in this case greater than a refractive index of the carrier.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: December 23, 2014
    Assignee: OSRAM Opto Semiconductors GmbH
    Inventors: Christoph Eichler, Teresa Lermer, Adrian Stefan Avramescu
  • Patent number: 8913642
    Abstract: In a slab laser, a gas mixture containing carbon dioxide CO2 is formed as a laser-active medium in a discharge space which is formed between two plate-shaped metal electrodes, the flat faces of which are located opposite one another. A resonator mirror is arranged on each of the mutually opposite end faces of the discharge space, the mirrors forming an unstable resonator parallel to the flat faces. At least one of the mutually facing flat faces is provided either on the entire flat face with a dielectric layer the thickness of which is greater on at least one sub-surface than in the remaining area of the flat face, or the at least one flat face is provided with a dielectric layer exclusively on at least one sub-surface.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: December 16, 2014
    Assignee: Rofin-Sinar Laser GmbH
    Inventors: Florian Engel, Stefan Ruppik, Volker Scholz, Hermann Hage
  • Patent number: 8902937
    Abstract: The present disclosure relates to a compact external cavity tunable laser apparatus. The laser apparatus includes a substrate, an external cavity tunable reflecting unit that reflects laser light entering from the outside on the substrate and selects and varies a wavelength of the reflected laser light, an optical fiber that outputs the laser light on the substrate; and an highly integrated light source that integrates the laser light input from the external cavity tunable reflecting unit using inclined input and output waveguides, a curved waveguide, and a straight waveguide to output the integrated laser light to the optical fiber in order to match an optical axis formed with the external cavity tunable reflecting unit with an optical axis formed with an optical fiber.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: December 2, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Ki-Hong Yoon, O-Kyun Kwon, Kisoo Kim, Byungseok Choi, Hyun Soo Kim, Su Hwan Oh
  • Patent number: 8848758
    Abstract: A gas-discharge waveguide CO2 laser has a Z-shaped folded waveguide formed by three ceramic tubes. Ends of the adjacent tubes are shaped and fitted together to form a common aperture. The tubes are held fitted together by spaced-apart parallel discharge electrodes. Four minors are arranged to form a laser-resonator having a longitudinal axis extending through the tubes.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: September 30, 2014
    Assignee: Coherent, Inc.
    Inventors: Anthony J. DeMaria, R. Russel Austin
  • Patent number: 8842704
    Abstract: An RF power-supply for driving a carbon dioxide CO2 gas-discharge laser includes a plurality of power-oscillators phase-locked to a common reference oscillator. Outputs of the phase-locked power-oscillators are combined by a power combiner for delivery, via an impedance matching network, to discharge-electrodes of the laser. In one example the powers are analog power-oscillators. In another example, the power-oscillators are digital power-oscillators.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: September 23, 2014
    Assignee: Coherent, Inc.
    Inventors: David P. Schmelzer, W. Shef Robotham, Jr., Frederick W. Hauer, Joel Fontanella
  • Patent number: 8787417
    Abstract: A hybrid laser for generating radiation includes an optical passive material and an optical active material. The laser includes a first optical waveguide and optical laser components with reflectors in the optical passive material. The first optical waveguide is adapted for coupling out radiation from the hybrid laser. The laser also includes a second optical waveguide defined in the optical active material. The optical laser components include reflectors defining a cavity and furthermore are adapted for providing laser cavity confinement in the first optical waveguide and the second optical waveguide. The second optical waveguide thereby is positioned at least partly over the first optical waveguide so that an evanescent coupling interface is defined between the second optical waveguide and the first optical waveguide and the evanescent coupling interface is positioned within the laser cavity.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: July 22, 2014
    Assignees: Universiteit Gent, IMEC
    Inventors: Roeland Baets, Dries Van Thourhout, Gunther Roelkens, Geert Morthier, Yannick De Koninck
  • Patent number: 8770763
    Abstract: A projection display device which displays an image by projecting the image on a screen includes a laser light source for emitting coherent light, a display device for forming an image to be displayed on a screen in an area illuminated by a luminous flux from the laser light source, a first diffusion plate for diffusing a luminous flux, and a second diffusion plate for diffusing a luminous flux. The first diffusion plate is provided in at least one of a conjugate position of the laser light source or the vicinity of the conjugate position in the optical path of the optical system including the laser light source through the screen. The second diffusion plate is provided in at least one of a conjugate position of the display device and the vicinity of the conjugate position.
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: July 8, 2014
    Assignee: Olympus Corporation
    Inventors: Kazuaki Murayama, Kanto Miyazaki
  • Patent number: 8693894
    Abstract: A gain clamped optical device includes a semiconductor stack and a resonant cavity configured to emit stimulated light. A window created in the optical device is configured to emit the stimulated light in an LED mode.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: April 8, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Shih-Yuan Wang, Michael Tan, Alexandre Bratkovski, Sagi Mathai
  • Patent number: 8670476
    Abstract: A component having a microring resonator and grating, coupled to a waveguide is described. By selection of the grating period, and other parameters such as the grating-waveguide coupling coefficient, an efficient filter may be designed and constructed. The component may be used in passive devices such as add-drop multiplexers or sensors, or in active devices such as lasers. Designs having essentially no response sidelobes, very narrow effective bandwidths, and fast filter roll-offs may permit compact devices to be produced, when compared with typical distributed sampled Bragg grating structures.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: March 11, 2014
    Assignee: The Board of Trustees of the University of Illinois
    Inventors: Lynford L. Goddard, Young Mo Kang, Amir Arbabi
  • Publication number: 20140064318
    Abstract: A gas-discharge waveguide CO2 laser has a Z-shaped folded waveguide formed by three ceramic tubes. Ends of the adjacent tubes are shaped and fitted together to form a common aperture. The tubes are held fitted together by spaced-apart parallel discharge electrodes. Four minors are arranged to form a laser-resonator having a longitudinal axis extending through the tubes.
    Type: Application
    Filed: November 11, 2013
    Publication date: March 6, 2014
    Applicant: COHERENT, INC.
    Inventors: Anthony J. DEMARIA, R. Russel AUSTIN
  • Patent number: 8656879
    Abstract: In a method for operating a laser device, which has a laser-active solid having a passive Q-switch, the laser device is acted upon using pumping light in such a way that a specifiable curve over time of the inversion density comes about in the laser-active solid, as a result of which an especially precise control of the time behavior is achieved during the generation of passively Q-switched laser pulses.
    Type: Grant
    Filed: March 19, 2009
    Date of Patent: February 25, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Heiko Ridderbusch
  • Publication number: 20140023105
    Abstract: A device for deflecting laser radiation (8) with a waveguide (1) having an entrance face (6) and an exit face (7) spaced apart from each other in the Z-direction by a spacing (L), wherein the waveguide (1) has a greater extent in the X-direction than in the Y-direction, and at least two electrodes (4, 5) arranged on the waveguide (1), wherein a deflection voltage (+V, ?V) is applied to the at least two electrodes (4, 5), so that the laser radiation is electro-optically deflected in the waveguide (1) with respect to the X-direction, wherein the spacing (L) between entrance face (6) and exit face (7) has a dimension so that the profile of the laser radiation after exiting the exit face (7) corresponds to the profile of the laser radiation prior to entering the entrance face (6). The spacing (L) may correspond to the Talbot length of the laser radiation.
    Type: Application
    Filed: March 15, 2012
    Publication date: January 23, 2014
    Applicant: LIMO Patentverwaltungs GmbH & Co. KG
    Inventors: Aleksei Mikhailov, Aliaksei Krasnaberski, Yuri Kolotushkin
  • Patent number: 8625647
    Abstract: A semiconductor laser of an embodiment includes: an optical resonator having a first cladding layer, a ring-shaped active layer on the first cladding layer, a ring-shaped second cladding layer on the active layer, a first electrode inside the ring shape on the first cladding layer, a ring-shaped second electrode on the second cladding layer, a first insulating layer between the first cladding layer and the active layer, formed from an inside wall toward an outside wall of the ring shape, where an outside wall side edge thereof is on an inner side than the outside wall, and a second insulating layer between the active layer and the second cladding layer, formed from the inside wall toward the outside wall, where an outside wall side edge thereof is on an inner side than the outside wall; and an optical waveguide optically coupled to the optical resonator.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: January 7, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuya Ohira, Nobuo Suzuki
  • Patent number: 8615027
    Abstract: A laser diode capable of performing self-pulsation operation, and capable of sufficiently reducing the coherence of laser light and stably obtaining low-noise laser light is provided. A laser diode includes: a laser chip including at least one laser stripe which extends in a resonator length direction between a first end surface and a second end surface opposed to each other, in which the laser stripe includes a gain region and a saturable absorption region in the resonator length direction, and the width of the laser stripe in the saturable absorption region is larger than the width of the laser stripe in the gain region.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: December 24, 2013
    Assignees: Sony Corporation, Tohoku University
    Inventors: Makoto Oota, Hiroyuki Yokoyama, Masaru Kuramoto, Masao Ikeda
  • Patent number: 8611391
    Abstract: A gas-discharge waveguide CO2 laser has a Z-shaped folded waveguide formed by three ceramic tubes. Ends of the adjacent tubes are shaped and fitted together to form a common aperture. The tubes are held fitted together by spaced-apart parallel discharge electrodes. Four mirrors are arranged to form a laser-resonator having a longitudinal axis extending through the tubes.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: December 17, 2013
    Assignee: Coherent, Inc.
    Inventors: Anthony J. DeMaria, R. Russel Austin
  • Patent number: 8548018
    Abstract: A command apparatus (10) for a plurality of laser power supplies (11, 12) comprises: a command generating section (5) generating commands for the laser power supplies; and a separating section (36) separating the generated commands into a bias command, an output command, an offset command and a gain command, wherein the bias command and the output command are common to the laser power supplies, the offset command and the gain command are defined at least in accordance with the discharge tubes corresponding to the laser power supplies respectively, wherein the command apparatus further comprises a transmitting section (37) transmitting, to the laser power supplies, the bias and the output command which are common to the laser power supplies and, transmitting the offset and the gain command defined at least in accordance with the discharge tubes corresponding to the laser power supplies respectively, corresponding to the laser power supplies.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: October 1, 2013
    Assignee: FANUC Corporation
    Inventors: Masahiro Honda, Hajime Ikemoto
  • Patent number: 8537871
    Abstract: A high power cladding light stripper and high power laser systems using the same are described. A cladding light stripper includes a housing, a section of fiber disposed in relation to the housing wherein a portion of the section of fiber has an exposed cladding region, a plurality of glue regions sequentially arranged adjacent to each other along the section of fiber and covering the exposed cladding region, and wherein at least one glue region between a first glue region and a last glue region of the plurality of glue regions has a refractive index higher or lower than both an adjacent previous glue region and an adjacent subsequent glue region.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: September 17, 2013
    Assignee: nLIGHT Photonics Corporation
    Inventor: Matthieu Saracco
  • Patent number: 8509269
    Abstract: Cylindrical optical components of quartz glass are known, which have an inner zone made of an inner zone glass, which extends in the direction of the longitudinal axis and is surrounded by a jacket zone made of a jacket zone glass, the average wall thickness thereof varying at least over a part of its length in the direction of the longitudinal axis of the component. The aim of the invention is to provide a method that allows a simple and cost-effective production of such an optical component from quartz glass.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: August 13, 2013
    Assignee: Heraeus Quarzglas GmbH & Co. KG
    Inventors: Peter Bauer, Karsten Braeuer, Marco Flach, Andreas Langner, Richard Schmidt, Clemens Schmitt, Gerhard Schoetz, Matthias Stecher
  • Patent number: 8422528
    Abstract: A laser may comprise a ceramic body including a first wall and a second wall opposite the first wall, a first mirror positioned at first ends of the first and second walls, a second mirror positioned at second ends of the first and second walls opposite the first ends, the first and second walls and the first and second mirrors defining a slab laser cavity within the ceramic body. The laser may further comprise a first electrode positioned outside the laser cavity and adjacent to the first wall of the ceramic body and a second electrode positioned outside the laser cavity and adjacent to the second wall of the ceramic body, wherein a laser gas disposed in the laser cavity is excited when an excitation signal is applied to the first and second electrodes. In some embodiments, the first and second mirrors may form a free-space multi-folded resonator in the slab laser cavity. In other embodiments, the first and second mirrors may form a free-space unstable resonator in the slab laser cavity.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: April 16, 2013
    Assignee: Iradion Laser, Inc.
    Inventors: Clifford E. Morrow, Wendelin Weingartner
  • Patent number: 8395131
    Abstract: A method for high-dose Grid radiotherapy utilizing a three-dimensional (3D) dose lattice formation is described herein. The 3D dose lattice can be achieved by, but not limited to, three technical approaches: 1) non-coplanar focused beams; 2) multileaf collimator (MLC)-based intensity modulated radiation therapy (IMRT) or aperture-modulated arc; and 3) heavy charged particle beam. The configuration of a 3D dose lattice is comprised of the number, location, and dose of dose vertices. The optimal configuration of a 3D dose lattice can be achieved by manual calculations or by automating the calculations for a generic algorithm. The objective of the optimization algorithm is to satisfy three conditions via iteration until they reach their global minimum. With 3D dose lattice, high doses of radiation are concentrated at each lattice vertex within a tumor with drastically lower doses between vertices (peak-to-valley effect), leaving tissue outside of the tumor volume minimally exposed.
    Type: Grant
    Filed: June 20, 2010
    Date of Patent: March 12, 2013
    Inventors: Xiaodong Wu, Mansoor M. Ahmed, Alan Pollack
  • Patent number: 8396091
    Abstract: An embodiment of the invention relates to a device comprising a laser and a waveguide stripe or netlike hexagonal stripe structure, which allows propagation of multitude of the lateral modes in the waveguide stripe or stripe structure, wherein the waveguide stripe has at least one corrugated edge section along its longitudinal axis to provide preferable amplification of the fundamental lateral mode or in-phase supermode and to obtain high brightness of the emitted radiation.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: March 12, 2013
    Assignee: Technische Universitat Berlin
    Inventors: Vladimir Kalosha, Kristijan Posilovic, Dieter Bimberg
  • Patent number: 8384063
    Abstract: A light emitting device includes a stacked body including at least a light emitting layer made of Inx(AlyGa1-y)1-xP(0?x?1, 0?y?1), a p-type cladding layer made of Inx(AlyGa1-y)1-xP (0?x?1, 0?y?1), and a bonding layer made of a semiconductor; and a substrate in which deviation in a lattice constant at a bonding interface with the bonding layer is larger than deviation in lattice constants between the light emitting layer and the bonding layer. The p-type cladding layer is located more distant from the bonding interface than the light emitting layer, and the p-type cladding layer has a carrier concentration of 0.5×1017 cm?3 or more and 3×1017 cm?3 or less.
    Type: Grant
    Filed: January 9, 2012
    Date of Patent: February 26, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Katsufumi Kondo, Ryo Saeki
  • Patent number: 8355416
    Abstract: A multi-transverse-optical-mode heterojunction diode laser characterized by wavelength control of its output. The wavelength control or the control of multi-transverse-optical-modes may be achieved by, for example, selectively etching a layer to partially remove it and possibly followed by epitaxial regrowth, or by selectively converting a layer to an insulating material of a different refractive index, or by selectively modifying the optical properties of a layer by ion implantation, or by selectively modifying the optical properties of a layer by impurity-induced vacancy disordering.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: January 15, 2013
    Assignee: Vega Wave Systems, Inc.
    Inventors: Alan R. Sugg, Anthony L. Moretti
  • Patent number: 8295319
    Abstract: A laser may comprise a ceramic body defining a chamber therein containing a laser gas. The ceramic body may include a plurality of parallel walls that partially define a first section of the chamber, the first section of the chamber defining a waveguide. The ceramic body may further include a plurality of oblique walls that partially define a second section of the chamber, the second section of the chamber being shaped to modify a transverse profile of a laser beam traveling through the second section of the chamber. The laser may further comprise a plurality of electrodes positioned outside the ceramic body and adjacent to the plurality of parallel walls such that only laser gas within the first section of the chamber is excited when an excitation signal is applied to the plurality of electrodes.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: October 23, 2012
    Assignee: Iradion Laser, Inc.
    Inventors: Clifford E. Morrow, Wendelin Weingartner
  • Patent number: 8236588
    Abstract: An object is to provide a multi-wavelength integrated semiconductor laser device which can reduce variations in emission point distance, can be formed by simplified manufacturing processes, and can provide improve electric characteristics. A first semiconductor laser element 100 having an active layer AL1 for emitting a laser beam of a first wavelength from its light-emitting point X1 and a second semiconductor laser element 200 having an active layer AL2 for emitting a laser beam of a second wavelength from its light-emitting point X2 are bonded to each other via an adhesive layer MC made of metal. At least either one of the semiconductor laser elements has a ridge waveguide made of an n-type semiconductor. The semiconductor laser elements 100 and 200 are bonded via the metal adhesive layer MC at the sides of their respective p-type semiconductors. A submount SUB is bonded to the first semiconductor laser element 100 via metal at a side where its ridge waveguide is formed.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: August 7, 2012
    Assignee: Pioneer Corporation
    Inventors: Mamoru Miyachi, Yoshinori Kimura
  • Patent number: 8223811
    Abstract: Narrow surface corrugated gratings for integrated optical components and their method of manufacture. An embodiment includes a grating having a width narrower than a width of the waveguide on which the grating is formed. In accordance with certain embodiments of the present invention, masked photolithography is employed to form narrowed gratings having a desired grating strength. In an embodiment, an optical cavity of a laser is formed with a reflector grating having a width narrower than a width of the waveguide. In another embodiment an integrated optical communication system includes one or more narrow surface corrugated gratings.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: July 17, 2012
    Assignee: Intel Corporation
    Inventor: Richard Jones
  • Patent number: 8207002
    Abstract: Devices for generating a laser beam are disclosed. The devices include a silicon micro ring having at least one silicon optical waveguide disposed at a distance from the micro ring. The radius and the cross-sectional dimension of the micro ring, the cross-sectional dimension of the waveguide, and the distance between the micro ring and the waveguide are determined such that one or more pairs of whispering gallery mode resonant frequencies of the micro ring are separated by an optical phonon frequency of silicon. Methods of manufacturing a lasing device including a silicon micro ring coupled with a silicon waveguide are also disclosed.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: June 26, 2012
    Assignee: The Trustees Of Columbia University In The City Of New York
    Inventors: Xiaodong Yang, Chee Wei Wong
  • Publication number: 20120128022
    Abstract: A laser may comprise a ceramic body defining a chamber therein containing a laser gas. The ceramic body may include a plurality of parallel walls that partially define a first section of the chamber, the first section of the chamber defining a waveguide. The ceramic body may further include a plurality of oblique walls that partially define a second section of the chamber, the second section of the chamber being shaped to modify a transverse profile of a laser beam traveling through the second section of the chamber. The laser may further comprise a plurality of electrodes positioned outside the ceramic body and adjacent to the plurality of parallel walls such that only laser gas within the first section of the chamber is excited when an excitation signal is applied to the plurality of electrodes.
    Type: Application
    Filed: November 23, 2010
    Publication date: May 24, 2012
    Inventors: Clifford E. Morrow, Wendelin Weingartner
  • Patent number: 8144741
    Abstract: A semiconductor laser comprises: a substrate; an n-cladding layer disposed on the substrate; an active layer disposed on the n-cladding layer; a p-cladding layer disposed on the active layer and forming a waveguide ridge; and a diffraction grating layer disposed between the active layer and the n-cladding layer or the p-cladding layer and including a phase shift structure in a part of the diffraction grating layer in an optical waveguide direction. The width of the p-cladding layer is increased in a portion corresponding to the phase shift structure of the diffraction grating layer.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: March 27, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kazuhisa Takagi
  • Patent number: 8126332
    Abstract: Described is a method for controlling the wavelength of a laser in a wavelength division multiplexed (WDM) system. The method includes generating broadband light having a dithered optical power and a wavelength spectrum that includes a plurality of WDM wavelengths. The broadband light is spectrally filtered to generate a spectrally-sliced optical signal having a wavelength spectrum that includes one of the WDM wavelengths. The spectrally-sliced optical signal is injected into a laser and a dithered optical power of the laser is determined. A parameter of the laser is controlled in response to the determination of the dithered optical power to thereby align a wavelength of the laser to the wavelength spectrum of the spectrally-sliced optical signal.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: February 28, 2012
    Assignee: LG-Ericsson Co., Ltd.
    Inventors: John Bainbridge, Tom Luk, Bin Cao
  • Patent number: 8116348
    Abstract: A gas laser device is presented that produces a near diffraction limited round beam exiting the discharge vessel. Through the use of a simple focusing system, additional waveguide strip and a spatial filter in conjunction with the new asymmetric hybrid planar waveguide resonator, a round diffraction limited beam can be produced exiting the discharge vessel. Furthermore, a second and very similar design is presented that allows for spatial filtering to take place directly outside of the discharge vessel, thereby enabling filtering of the beam to be an added option.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: February 14, 2012
    Assignee: Rofin-Sinar UK Ltd.
    Inventor: Gavin Markillie
  • Patent number: 8115192
    Abstract: A light emitting device includes a stacked body including at least a light emitting layer made of Inx(AlyGa1-y)1-xP (0?x?1, 0?y?1), a p-type cladding layer made of Inx(AlyGa1-y)1-xP (0?x?1, 0?y?1), and a bonding layer made of a semiconductor; and a substrate in which deviation in a lattice constant at a bonding interface with the bonding layer is larger than deviation in lattice constants between the light emitting layer and the bonding layer. The p-type cladding layer is located more distant from the bonding interface than the light emitting layer, and the p-type cladding layer has a carrier concentration of 0.5×1017 cm?3 or more and 3×1017 cm?3 or less.
    Type: Grant
    Filed: May 1, 2009
    Date of Patent: February 14, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Katsufumi Kondo, Ryo Saeki
  • Patent number: 8111724
    Abstract: Current may be passed through an n-doped semiconductor region, a recessed metal semiconductor alloy portion, and a p-doped semiconductor region so that the diffusion of majority charge carriers in the doped semiconductor regions transfers heat from or into the semiconductor waveguide through Peltier-Seebeck effect. Further, a temperature control device may be configured to include a metal semiconductor alloy region located in proximity to an optoelectronic device, a first semiconductor region having a p-type doping, and a second semiconductor region having an n-type doping. The temperature of the optoelectronic device may thus be controlled to stabilize the performance of the optoelectronic device.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: February 7, 2012
    Assignee: International Business Machines Corporation
    Inventors: Solomon Assefa, William M. Green, Younghee Kim, Joris Van Campenhout, Yurii Vlasov
  • Patent number: 8064493
    Abstract: A surface emitting photonic device including a substrate; and a waveguide structure on the substrate. The waveguide structure includes an active region along its longitudinal axis and the active region is for generating light. The waveguide structure also has a trench formed therein transverse to the active region and defining a first wall forming an angled facet at one end of the active region, the first wall having a normal that is at a non-parallel angle relative to the longitudinal axis of the waveguide structure. The trench also defines a second wall located opposite the first wall.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: November 22, 2011
    Assignee: BinOptics Corporation
    Inventors: Alex Behfar, Cristian Stagarescu
  • Patent number: 8009715
    Abstract: A mode selection technique in a laser is described wherein a recess is formed in a surface of a waveguide in the laser. The recess provides a region of free space propagation within the waveguide which preferentially selects the lowest order mode. A mode selective RF excited CO2 slab laser, having a stable resonator in the waveguide dimension and a negative branch unstable resonator in the non-waveguide dimension, is constructed and the position and size of the recess is considered to provide low order mode selection.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: August 30, 2011
    Assignee: Rofin-Sinar UK Ltd.
    Inventors: Gavin Alan James Markillie, Jason Robert Lee
  • Patent number: 8000370
    Abstract: A laser-induced optical wiring apparatus includes a substrate, first and second light-reflecting members provided on the substrate separately from each other, an optical waveguide provided on the substrate for optically coupling the first and second light-reflecting members to form an optical resonator, a first optical gain member provided across the optical waveguide and forming a laser oscillator along with the first and second light-reflecting members, and a second optical gain member provided across the optical waveguide separately from the first optical gain member, and forming another laser oscillator along with the first and second light-reflecting members.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: August 16, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hideto Furuyama
  • Patent number: 7995625
    Abstract: Provided is a resonator of a hybrid laser diode. The resonator includes: a substrate including a semiconductor layer where a hybrid waveguide, a multi-mode waveguide, and a single mode waveguide are connected in series; a compound semiconductor waveguide, provided on the hybrid waveguide of the semiconductor layer, having a tapered coupling structure at one end of the compound semiconductor waveguide, the tapered coupling structure overlapping the multi-mode waveguide partially; and a reflection part provided on one end of the single mode waveguide. The multi-mode waveguide has a narrower width than the hybrid waveguide and the single mode waveguide has a narrower width than the multi-mode waveguide.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: August 9, 2011
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Young Ahn Leem, Jung-Ho Song, Kisoo Kim, Gyungock Kim
  • Patent number: 7970022
    Abstract: In one aspect, the disclosure features an article, including a fiber waveguide extending along a waveguide axis, the fiber waveguide including a core extending along the waveguide axis and a confinement region surrounding the core. The confinement region is configured to guide radiation at a first wavelength, ?1, along the waveguide axis and is configured to transmit at least some of the radiation at a second wavelength, ?2, incident on the confinement region along a path, where ?1 and ?2 are different. The core includes a core material selected to interact with radiation at ?1 to produce radiation at ?2.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: June 28, 2011
    Assignee: Massachusetts Institute of Technology
    Inventors: Ofer Shapira, Ken Kuriki, Nicholas D. Orf, John D Joannopoulos, Yoel Fink, Alexander Stolyarov
  • Patent number: 7970038
    Abstract: An RF excited gas discharge laser is disclosed including a housing holding the lasing gas. An electrode assembly is mounted within the housing. The electrode assembly includes a pair of elongated planar electrodes mounted in face to face relationship with a narrow gap therebetween. A pair of planar dielectric plates are positioned along the side edges of the gap to seal the discharge region. The plates extend part of the way into the gap from both sides edges of the electrodes. The inner surfaces of the electrodes are provided with an opposed trench in the region surrounding the inner edges of the plates. In this way, the exposure of the inner edges of the plates to the discharge is minimized improving performance.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: June 28, 2011
    Assignee: Coherent, Inc.
    Inventors: Christian J. Shackleton, Raul Martin Wong Gutierrez
  • Patent number: 7961765
    Abstract: Narrow surface corrugated gratings for integrated optical components and their method of manufacture. An embodiment includes a grating having a width narrower than a width of the waveguide on which the grating is formed. In accordance with certain embodiments of the present invention, masked photolithography is employed to form narrowed gratings having a desired grating strength. In an embodiment, an optical cavity of a laser is formed with a reflector grating having a width narrower than a width of the waveguide. In another embodiment an integrated optical communication system includes one or more narrow surface corrugated gratings.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: June 14, 2011
    Assignee: Intel Corporation
    Inventor: Richard Jones