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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Application No. | Application Title | Issue Date |
| 20120082175 | LARGE DIAMETER OPTICAL WAVEGUIDE, GRATING AND LASER A large diameter optical waveguide, grating, and laser includes a waveguide having at least one core surrounded by a cladding, the core propagating light in substantially a few transverse spatial modes; and having an outer waveguide dimension of said waveguide being gre... | 04/05/2012 |
| 20110222574 | TWO-DIMENSIONAL WAVELENGTH-BEAM-COMBINING OF LASERS USING FIRST-ORDER GRATING STACK A method and apparatus for two-dimensional wavelength beam combining of laser sources. In one example, an external cavity multi-wavelength laser includes an array of laser emitters each producing an optical beam having a specified wavelength, a grating stack comprising ... | 09/15/2011 |
| 20100238966 | LIGHT SOURCE APPARATUS AND PROJECTOR A light source apparatus includes: a light emitter; a pair of electrodes for driving the light emitter; and an external resonant cavity that reflects part of the light emitted from a light-exiting end surface of the light emitter. The light emitter includes an active la... | 09/23/2010 |
| 20100220384 | LASER DEVICE, LASER DISPLAY APPARATUS, LASER RADIATING APPARATUS, AND NONLINEAR OPTICAL ELEMENT A laser device, includes: a fundamental wave generating portion configured to generate a plurality of fundamental waves having wavelengths which are different from each other in at least one set thereof, the fundamental wave generating portion having a semiconductor las... | 09/02/2010 |
| 20090323737 | System and devices for improving external cavity diode lasers using wavelength and mode sensors and compact optical paths External cavity laser (ECL) systems and methods for measuring the wavelength of the ECL by using a portion of the positional light received by the position sensitive detector (PSD) to determine the position of a wavelength tuning element (such as a diffraction grating o... | 12/31/2009 |
| 20090245295 | Resonator cavity configuration and method A resonator cavity (10A) and method are provided. The resonator cavity (10A) includes at least one gain medium (16) and end reflectors (12, 14) which define together longitudinal modes of light in the cavity, and further includes an intra-cav... | 10/01/2009 |
| 20090225796 | Diffraction grating device, laser diode, and wavelength tunable filter A diffraction grating device includes a substrate with a primary surface having a plurality of grating areas that are periodically arranged with a constant period in a predetermined axis direction, the grating area including a first area and a second area, a diffraction... | 09/10/2009 |
| 20090225800 | VERY LOW-NOISE SEMICONDUCTOR LASER The subject of the invention is a laser comprising a semiconductor active medium with a population inversion lifetime τc and a resonant cavity with a lifetime of the photons in the cavity τp. The cavity includes means for being longitudinally mon... | 09/10/2009 |
| 20090207876 | Laser Source for the Infrared Wavelength Range The present invention relates to a laser source for the infrared wavelength range which comprises a pump laser (1) which emits radiation (PP) which is input radiation to a first optical parametric oscillator (3, 4, 5), whose output radiation (SP) is input ... | 08/20/2009 |
| 20090201967 | LASER DEVICE COMPRISING A DIFFRACTION GRATING AND COUPLED LASER RESONATORS The present invention provides a laser device wherein one diffraction grating and at least two reflectors are arranged such that two coupled resonators are formed for the light path. This laser device is an arrangement forming a first optical resonator comprising a firs... | 08/13/2009 |
| 20090196320 | Wavelength converter apparatus A compact apparatus is provided for stably converting a wavelength of a laser diode with the use of an optical fiber and a wavelength selective device. Employing a bulk type element as a wavelength selective device makes the action of controlling the temperature of the ... | 08/06/2009 |
| 20090110021 | Plasmon stabilized unimodal laser diodes A device having a light cavity includes, at one end, a plasmonic reflector having a grating surface for coupling incoming light into traverse plasmon waves and for coupling the traverse plasmon wave into broaden light, the surface serving to redistribute light within th... | 04/30/2009 |
| 20090059994 | Laser System for Medical and Cosmetic Applications A laser system for medical and cosmetic applications has an optical delivery system for guiding a laser beam to a target surface, wherein the optical delivery system has an external optical element facing toward the target surface. A mechanical filter in the form of a p... | 03/05/2009 |
| 20090028206 | Method of Increasing the Laser Damage Threshold of Diffraction Gratings For increasing the laser damage threshold (LDT) of diffraction gratings, particularly of multi-layer dielectric diffraction (MLD) gratings, the invention proposes a method for treating a diffraction grating to be used in a high energy laser apparatus having a first lase... | 01/29/2009 |
| 20090028207 | Mobile Charge Induced Periodic Poling And Device Devices and methods are disclosed for realizing a high quality bulk domain grating structure utilizing mobile charges that are generated by means of photo-excitation in a substrate. An effect of light exposure (UV, visible, or a combination of wavelengths) is to generat... | 01/29/2009 |
| 20080267246 | Apparatus And Methods For Altering A Characteristic Of A Light-Emitting Device Apparatus and methods for altering one or more spectral, spatial, or temporal characteristics of a light-emitting device are disclosed. Generally, such apparatus may include a volume Bragg grating (VBG) element that receives input light generated by a light-emitting dev... | 10/30/2008 |
| 20080253424 | Use of Volume Bragg Gratings For The Conditioning Of Laser Emission Characteristics Apparatus and methods for altering one or more spectral, spatial, or temporal characteristics of a light-emitting device are disclosed. Generally, such apparatus may include a volume Bragg grating (VBG) element that receives input light generated by a light-emitting dev... | 10/16/2008 |
| 20080212635 | HIGH EFFICIENCY DISTRIBUTED FEEDBACK (DFB) LASER WITH LOW-DUTY CYCLE GRATING The invention provides a grating for a distributed feedback laser having decreased diffraction loss with reduced +/−1 order diffraction and scattering loss resulting from the reduced imperfections in the grating fabrication. In various embodiments, the grating has a l... | 09/04/2008 |
| 20080205476 | HIGH EFFICIENCY PARTIAL DISTRIBUTED FEEDBACK (p-DFB) LASER A second-order multi-mode partial distributed feedback (p-DFB) laser having increased electrical-to-optical power conversion efficiency, stabilized wavelength and narrowed emission linewidth. The laser includes an abbreviated grating housed in the laser cavity that is s... | 08/28/2008 |
| 20080192794 | Lateral-Bragg-Grating-Surface-Emitting Laser/Amplifier (LBGSE) A traveling-wave, surface-emitting-optical-waveguide amplifier uses Bragg gratings to provide both confinement in the lateral direction and couple light out of the waveguide plane. The grating lines are parallel to the direction of flow of the optical mode in the travel... | 08/14/2008 |
| 20080159341 | Tunable quantum cascade lasers and photoacoustic detection of trace gases, TNT, TATP and precursors acetone and hydrogen peroxide Methods and apparatus for broad tuning of single wavelength quantum cascade lasers and the use of light output from such lasers for highly sensitive detection of trace gases such as nitrogen dioxide, acetylene, and vapors of explosives such as trinitrotoluene (TNT) and ... | 07/03/2008 |
| 20080151947 | Periodically-chipred holographic volume transmission gratings The present application discloses a laser device and includes at least one laser system having at least one two emitters therein, each emitter configured to output a laser output having a first wavelength spectrum, at least one grating device having at least two grating... | 06/26/2008 |
| 20080080585 | Volume bragg lasers based on high efficiency diffractive elements in photo-thermo-refractive glass A volume Bragg laser including a resonator comprising photo-thermo-refractive (PTR) volume diffractive elements that can be used in a laser emitting window of transparency of PTR glass to provide control of the lasers spectral and angular parameters, and methods, device... | 04/03/2008 |
| 20080049805 | BURIED TYPE SEMICONDUCTOR LASER A semiconductor laser includes a p-type InP substrate and a ridge section of a p type InP first cladding layer, an AlGaInAs strained quantum well active layer and a n type InP second cladding layer, laminated one atop the other. On both sides of the ridge section, a cur... | 02/28/2008 |
| 20080002746 | OPTICAL TRANSMITTERS External cavity optical transmitters are disclosed which include a gain chip and a mirror that define an optical cavity. The transmitters further include a modulator operated at or near the same temperature as the gain chip. In some examples, the optical transmitters ar... | 01/03/2008 |
| 20070280306 | LASER DEVICE, CONTROL DEVICE OF LASER DEVICE, METHOD OF CONTROLLING LASER DEVICE, METHOD OF TUNING WAVELENGTH OF LASER DEVICE AND CONTROL DATA OF LASER DEVICE A laser device includes a cavity and a control portion. The cavity has an optical amplifier, a wavelength selectable portion having a changeable transmission wavelength range, and a mirror. The control portion controls the wavelength selectable portion so that the trans... | 12/06/2007 |
| 20070280326 | External cavity laser in thin SOI with monolithic electronics An ECL laser structure utilizes an SOI-based grating structure coupled to the external gain medium to provide lasing activity. In contrast to conventional Bragg grating structures, the grating utilized in the ECL of the present invention is laterally displaced (i.e., of... | 12/06/2007 |
| 20070274367 | Optical pickup device An optical pickup device includes a diffraction grating for separating a light beam from a semiconductor laser into at least three light beams. The diffraction grating is partitioned into five areas each having a given periodic structure: a first area; a second area adj... | 11/29/2007 |
| 20070263694 | LASER DEVICE, LASER MODULE, SEMICONDUCTOR LASER AND FABRICATION METHOD OF SEMICONDUCTOR LASER A semiconductor laser has first and second diffractive grating regions. The first diffractive grating region has segments, has a gain, and has first discrete peaks of a reflection spectrum. The second diffractive grating region has segments combined to each other, and h... | 11/15/2007 |
| 20070230534 | Grating enhanced solid-state laser amplifiers A novel method and apparatus for suppressing ASE and parasitic oscillation modes in a high average power laser is introduced. Such an invention, as disclosed herein, uses diffraction gratings to increase gain, stored energy density, and pumping efficiency of solid-state... | 10/04/2007 |
| 20070230533 | Laser module Disclosed is a laser module for generating laser light without a wavelength shift during a direct modulation of high frequency. The laser module includes: a laser light source for generating a first light; a nonlinear crystal for secondary harmonic generation for wavele... | 10/04/2007 |
| 20070223554 | External cavity laser Embodiments of systems and methods are provided for a tunable laser device. The tunable laser device may include a diffraction grating connected to a pivot arm that pivots the diffraction grating about a pivot point to tune the laser device. In pivoting the diffraction ... | 09/27/2007 |
| 20070201528 | VERTICAL CAVITY SURFACE EMITTING LASER AND METHOD OF MANUFACTURING TWO-DIMENSIONAL PHOTONIC CRYSTAL OF VERTICAL CAVITY SURFACE EMITTING LASER A vertical cavity surface emitting laser includes an active layer between a first reflector and a second reflector and at least either the first reflector or the second reflector includes a two-dimensional photonic crystal. The two-dimensional photonic crystal has a str... | 08/30/2007 |
| 20070201527 | VERTICAL CAVITY SURFACE EMITTING LASER In a vertical cavity surface emitting laser including a cavity structure formed by arranging a first reflector (102), an active region (104) and a second reflector (107) on a substrate, the second reflector is formed to include a refractive index pe... | 08/30/2007 |
| 20070171952 | Excimer laser and line narrowing module An excimer laser and a line-narrowing module capable of increasing and maximizing production yield in semiconductor manufacturing are disclosed. The line-narrowing module utilizes a beam expander that passes laser light, produced by and incident from a generator of the ... | 07/26/2007 |
| 20070165682 | Widely-tunable laser apparatus A widely-tunable laser apparatus comprises a plurality of tunable lasers having different ranges that overlap to encompass a desired operating range of wavelengths (for example from 1250 nm to 1650 nm) of the widely-tunable laser apparatus. The tunable lasers are tunabl... | 07/19/2007 |
| 20070160325 | Angle-tunable transmissive grating A tunable transmissive grating comprises a transmissive dispersive element, a reflective element, and an angle θ formed between the two elements. A first optical path is formed according to the angle θ, wherein light dispersing from the dispersive element is directed ... | 07/12/2007 |
| 20070160106 | External cavity laser with a tunable holographic element Embodiments of systems and methods are provided for a tunable laser device. The tunable laser device may include a tunable Bragg reflector that allows its wavelength to be tuned via temperature and/or pressure. This Bragg reflector may include holographic material in wh... | 07/12/2007 |
| 20070147443 | High repetition rate visible optical parametric oscillator A tunable coherent light source includes a pump laser for generating a pump beam and an optical parametric oscillator including a crystal exhibiting an output curve for a pump beam of a defined wavelength, the output curve defining wavelengths of signal and idler output... | 06/28/2007 |
| 20070133628 | LIGHT SOURCE DEVICE AND PROJECTOR INCLUDING LIGHT SOURCE DEVICE A light source device includes: a laser light source emitting a laser beam of a prescribed wavelength; a nonlinear optical element, disposed facing a light emergence surface of the laser light sources which converts an emission wavelength of the laser beam emitted from ... | 06/14/2007 |
