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| Number | Title | Issue Date |
| 8179937 | High speed light emitting semiconductor methods and devices A method for producing a high frequency optical signal component representative of a high frequency electrical input signal component, includes the following steps: providing a semiconductor transistor structure that includes a base region of a first semiconductor t... | 05/15/2012 |
| 8023543 | Surface emitting semiconductor laser, surface emitting semiconductor laser device, optical transmission device, and optical information processing device A surface emitting semiconductor laser includes: a semiconductor substrate; a lower reflector that is formed on the semiconductor substrate and includes a semiconductor multilayer of a first conduction type; an upper reflector that is formed above the semiconductor ... | 09/20/2011 |
| 7970031 | Q-switched laser with passive discharge assembly Embodiments of the invention concern a passive discharge assembly comprising one or more substantially sharp electrode pins that are positioned proximate to a charged, insulating surface, such as the optical entrance and exit surface of a Q-switch crystal, e.g., lit... | 06/28/2011 |
| 7643524 | Surface-emitting laser and laser projector A surface emitting laser includes an active layer disposed on a semiconductor substrate, and a pair of upper and lower electrodes for injecting carriers into the active layer. The plane surface of the lower electrode is shaped into a star so that injection of curren... | 01/05/2010 |
| 7593442 | Semiconductor laser device, semiconductor laser device manufacturing method, optical disk apparatus and optical transmission system In the semiconductor laser device of the present invention, a p-side electrode 115 formed on a second conductive type semiconductor layer group of the layers 108 through 114 includes an Ag layer 115a, a Pd layer 115b ... | 09/22/2009 |
| 7496123 | VCSEL with improved high frequency characteristics, semiconductor laser device, module, and optical transmission device A VCSEL including a substrate, a first semiconductor layer of a first conductivity-type formed on the substrate, an active layer formed on the first semiconductor layer, a second semiconductor layer of a second conductivity-type formed on the active layer, a first e... | 02/24/2009 |
| 7466733 | Optical device chip, and optical module and method for manufacturing the same An optical device chip includes: a first semiconductor layer of a first conductivity type; an optical layer that emits light or receives light formed above the first semiconductor layer; a second semiconductor layer of a second conductivity type formed above the opt... | 12/16/2008 |
| 7450620 | Electrode structure and optical semiconductor element An electrode structure includes a first conductive layer, an insulation layer that covers at least a portion of a marginal area of an upper surface of the first conductive layer and has a first sloped section that slopes down toward the upper surface of the first co... | 11/11/2008 |
| 7436874 | Laser device According to the present invention, a first p-side electrode 7A made of metal which is provided with regularly arranged holes 10 having a diameter smaller than a laser oscillation wavelength and a second p-side electrode 7B arranged around the p... | 10/14/2008 |
| 7369592 | Semiconductor laser device A semiconductor laser device comprises: an active layer; a cladding layer of a first conductivity type; an insulating film; a first electrode; and a pad electrode provided on the first electrode. The cladding layer is provided above the active layer, and has a ridge... | 05/06/2008 |
| 7366212 | Alterable frequency coherent light generator An alterable frequency coherent light generator for the generation of highly energy efficient coherent light, by means of a power supply connected to a four-lead capacitor, which is connected to a variable resistive device in series with a vacuumed bulb. The direct ... | 04/29/2008 |
| 7366215 | Optical module An optical module includes a stem; a first lead pin and a second lead pin for receiving differential signals, the first and second lead pins penetrating the stem; a mount block fixed to the stem; a laser diode having a pair of electrodes; a submount mounted on the m... | 04/29/2008 |
| 7247992 | Ion accelerator arrangement For an ion accelerator system having a special magnetic field structure with an alternating predominantly longitudinal and crosswise progression of the magnetic field, a geometry of the ionization chamber having a non-cylindrical shape of the chamber wall that is ad... | 07/24/2007 |
| 7215697 | Matched impedance controlled avalanche driver Controlled avalanche driver circuits and apparatuses for gas lasers. One embodiment typically delivers short, rapid, high voltage ionizing pulses in combination with an electric field whose magnitude is too low to sustain a normal glow discharge. The plasma is typic... | 05/08/2007 |
| 7200318 | Near infra-red composite polymer-nanocrystal materials and electro-optical devices produced therefrom The invention comprises a composite material comprising a host material in which are incorporated semiconductor nanocrystals. The host material is light-transmissive and/or light-emissive and is electrical chargetransporting thus permitting electrical charge transpo... | 04/03/2007 |
| 7179669 | Tunable semiconductor laser and method thereof A tunable semiconductor laser including a Fabry-Perot filter and an electrode array is disclosed. The propagation direction of the light beam in the cavity can be consecutively shifted applying electric field or current to the electrode and tuning can consecutively ... | 02/20/2007 |
| 7154926 | Laser diode module, laser apparatus and laser processing apparatus Submount substrates are connected to both sides of a laser diode via hard solders. The lower submount substrate and a heat sink are connected together by a soft solder. The heat sink and a presser electrode are fixed with a predetermined gap therebetween via an insu... | 12/26/2006 |
| 7092419 | Wavelength agile laser An electric field that changes across space is synthesized, by applying voltage levels independent of one another at several locations. The independence in voltage levels allows the electric field that is synthesized to be made periodic or aperiodic. Such a synthesi... | 08/15/2006 |
| 7079565 | Systems and methods utilizing laser discharge electrodes with ceramic spoilers Arcing can be minimized in a discharge chamber of an excimer or molecular fluorine laser system by utilizing an improved electrode structure. An electrode structure can include at least one ceramic spoiler positioned near the discharge region of the electrode. An in... | 07/18/2006 |
| 6987784 | Wavelength agile laser A method and system are disclosed for synthesizing an electric field. In accordance with exemplary embodiments of the present invention, an electric field that changes across a distance in space is synthesized by applying voltage levels at several locations independ... | 01/17/2006 |
| 6972400 | Multi-mode vibration sensor laser A multimode remote vibration sensor. The inventive sensor (8) includes a mode locked laser transmitter (10); a receiver (30) adapted to detect signals transmitted by the laser (10) and reflected by an object (22) and a signal proce... | 12/06/2005 |
| 6965623 | Semiconductor laser device and method of manufacturing the same In the semiconductor laser device of the present invention, a P-type diffusion region 3A is disposed in an N− epitaxial layer 2 of a silicon submount 16, and an N-type diffusion region 4A is disposed in this P-type diffusion ... | 11/15/2005 |
| 6965624 | Laser gas replenishment method A method and apparatus is provided for stabilizing output beam parameters of a gas discharge laser by maintaining a molecular fluorine component of the laser gas mixture at a predetermined partial pressure using a gas supply unit and a processor. The molecular fluor... | 11/15/2005 |
| 6907055 | Method and circuit for measuring the optical modulation amplitude (OMA) in the operating region of a laser diode A method and circuit for measuring the optical modulation amplitude in the operating region of a laser diode is described. The method utilises two measurements of OMA, each measurement being related to the slope in a specific portion of the operating region of the p... | 06/14/2005 |
| 6885686 | High coherent power, two-dimensional surface-emitting semiconductor diode array laser A semiconductor laser is formed on a semiconductor substrate with an array of laterally spaced laser device elements each including a second order distributed feedback grating bounded by distributed Bragg reflector gratings and a central phase shift in the distribut... | 04/26/2005 |
| 6850547 | Nitride based semiconductor laser device and method of fabricating the same A semiconductor laser device is constructed by stacking an n-cladding layer, an n-optical guide layer, an MQW active layer, a p-cap layer, a p-optical guide layer, a p-cladding layer, an n-current blocking layer, and a p-contact layer in this order on one surface of... | 02/01/2005 |
| 6782030 | Gas laser The present invention relates to a gas laser with a high-voltage electrode 12 and a ground electrode 14, which electrodes 12, 14 are disposed relative to each other so as to form a discharge gap 16 between them, and with high voltage gene... | 08/24/2004 |
| 6693938 | Discharge circuit for pulsed laser A discharge circuit for pulsed laser 10 in which one connecting portion of a preionization capacitor Cpp is connected to a preionization electrode 4 and the other one connecting portion of the preionization capacitor Cpp is connected to a junction between... | 02/17/2004 |
| 6674775 | Contact structure for semiconductor lasers An improved electrical contact structure can be manufactured by plating a component of a first material such as molybdenum with a second material such as copper or silver. The first and second materials are selected to provide a desired effective coeffici... | 01/06/2004 |
| 6671302 | Device for self-initiated UV pre-ionization of a repetitively pulsed gas laser A device for use with a repetitively pulsed gas laser provides self-initiated UV preliminary ionization of the active volume of a laser, which has extended high-voltage and grounded electrodes disposed parallel to one another, to which peaking capacitors ... | 12/30/2003 |
| 6636545 | Supersonic and subsonic laser with radio frequency excitation Disclosed is a gas laser utilizing radio frequency excitation in the area of sonic or supersonic/subsonic transfer gas flow. The laser uses various types of gases and mixtures of gases as the active medium using radio frequency excitation. The gas is supp... | 10/21/2003 |
| 6618422 | Preionization arrangement for a gas laser A preionization device for a gas laser comprises an internal preionization electrode having a dielectric housing around it and an external preionization electrode displaced from the dielectric housing by a small gap. The dielectric housing includes two cy... | 09/09/2003 |
| 6553049 | ArF laser with low pulse energy and high rep rate A reliable modular production quality ArF excimer laser capable of producing laser pulses at repetition rates in the range of 3,000 to 4,000 Hz or greater with pulse energies in the range of about 2 mJ to 5 mJ or greater with a full width half, maximum ba... | 04/22/2003 |
| 6535540 | Discharge device for pulsed laser In a preionization discharge circuit 10, when a switch SW14 is turned on, an electric current i10 from a constant current source 13 flows through a loop of a coil L12, en electrode 11A and the switch SW14. When it is assumed that an inductance of the coil... | 03/18/2003 |
| 6442185 | All-metal, DC excited laser with RF pre-ionization The present invention provides a novel and improved technique for achieving a combined RF-DC gas discharge in the optical cavity of the gas laser. The combination of the fast pre-ionization with the transverse RF discharge and the high power excitation wi... | 08/27/2002 |
| 6404797 | Efficiency high power laser device In an apparatus and method for generating high power laser radiation, the geometry of the resonant laser cavity defines a fundamental spatial or transverse cavity mode. A gain medium is disposed within the resonant cavity and an energy source energizes th... | 06/11/2002 |
| 6229837 | Metal-vapor pulsed laser The present invention provides a novel metal-vapor pulsed laser capable of being manufactured without using a large-sized laser tube or an expensive discharging circuit. The output and the efficiency of the laser can be improved economically and easily. T... | 05/08/2001 |
| 6018537 | Reliable, modular, production quality narrow-band high rep rate F2 laser The present invention provides a reliable modular production quality excimer laser capable of producing 10 mJ laser pulses in the range of 1000 Hz to 2000 Hz or greater. Replaceable modules include a laser chamber; a pulse power system comprised of three ... | 01/25/2000 |
| 6018540 | Semiconductor light emitting element and optical fiber transmission system Disclosed are a semiconductor light emitting element whose temperature characteristics are compensated for so as to provide a stable temperature characteristics in a temperature range from -40° C. to +85° C., and an optical fiber transmission system usi... | 01/25/2000 |
| 5818858 | Device for producing an electric potential having a difference frequency of a self-mixed signal in a laser resonator A device and method for measuring a difference frequency having a simple structure and utilizing optogalvanic effect for measuring a difference frequency when carbon dioxide laser light of a single wavelength is varied in frequency by a measuring object. ... | 10/06/1998 |
