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| Number | Title | Issue Date |
| 8179935 | Tunable optical resonator An optical apparatus includes a substrate comprising a layer of thermally insulating material disposed thereon; an optical resonator disposed on the layer of thermally insulating material; and a trench in the thermally insulating material disposed around at least a ... | 05/15/2012 |
| 8121159 | Temperature compensation method for laser power of an optical disk drive A temperature compensation method for laser power in an optical disk drive is provided. A predetermined linear-fitting power curve and a temperature-changing slope curve are previously stored in the optical disk drive. Firstly, an output of laser power is controlled... | 02/21/2012 |
| 8121158 | Optical projection system and method for a cooled light source A light projection optical system is presented. The system comprises a cooling chamber containing: a light source operative at a cool temperature being lower than 240K; a cooler unit capable of cooling said light source to said cool temperature during the light sour... | 02/21/2012 |
| 8102888 | Semiconductor laser device and driving method of the same A semiconductor laser device according to the present invention outputs light while periodically varying the temperature of a semiconductor laser, an optical waveguide, or a diffraction grating, outputs light while causing the optical waveguide or the diffraction gr... | 01/24/2012 |
| 8094694 | Operating a pulse laser diode Circuit arrangements for the operation of a pulse laser diode and methods for operating a pulse laser diode include a current source to supply a direct current to the pulse laser diode. The circuit arrangement can provide operation of the pulse laser diode that can ... | 01/10/2012 |
| 8073028 | Light emitting apparatus, optical scanning apparatus, and image forming apparatus A light emitting apparatus includes a surface emitting laser and a ceramic package. The surface emitting laser has a common electrode on the back surface thereof and is mounted on the ceramic package via the common electrode. The common electrode of the surface emit... | 12/06/2011 |
| 8068524 | Submounts for Semiconductor Lasers A submount for a semiconductor laser. The submount has a layer of silicon carbide (SiC) and a layer of aluminum nitride (AlN) deposited on the layer of SiC. The submount is bonded to the InP-based laser by a hard solder applied to the AlN layer. Preferably, the thic... | 11/29/2011 |
| 8050302 | Wavelength conversion laser light source, laser light source device and two-dimensional image display device adopting the same, and method of setting temperature of wavelength conversion element A wavelength conversion laser light source includes: an element temperature switching section that switches a temperature of the wavelength conversion element according to a harmonic wave output value as set in an output setting device, and the element temperature s... | 11/01/2011 |
| 8031751 | Nitride semiconductor laser device The present invention relates to a nitride semiconductor laser device having a structure in which two or more of nitride semiconductor laser elements, having at least a first electrode on a first main surface of a first conductive type conductive substrate, having a... | 10/04/2011 |
| 8023541 | Optical transmission circuit An optical transmission circuit includes a light emitting device (10) having different temperature characteristics at low temperature and high temperature (e.g., a VCSEL (Vertical Cavity Surface Emitting Laser), differential switch transistors (M1, M | 09/20/2011 |
| 8018980 | Laser diode package with enhanced cooling A laser diode package assembly includes a reservoir filled with a fusible metal in close proximity to a laser diode. The fusible metal absorbs heat from the laser diode and undergoes a phase change from solid to liquid during the operation of the laser. The metal ab... | 09/13/2011 |
| 7991028 | Tunable solid state laser system A high-powered diffraction limited diode pumped solid-state source optically end pumps a compact, widely tunable solid state material. Imaging of the collimated pump beam into the tunable medium produces ideal volumetric overlap producing high conversion efficiencie... | 08/02/2011 |
| 7965747 | Laser light source apparatus A laser light source apparatus includes a laser light source; a heat exchanger that includes a plurality of cooling fins and that cools the laser light source; a driving circuit that drives the laser light source; a housing including an intake port and an exhaust po... | 06/21/2011 |
| 7944955 | Liquid cooled laser bar arrays incorporating diamond/copper expansion matched materials A laser diode array having a plurality of diode bars bonded by a hard solder to expansion matched spacers and mounted on a gas or liquid cooled heatsink. The spacers are formed of a material such as copper/diamond composite material having a thermal expansion that c... | 05/17/2011 |
| 7924895 | Monolithic diode-pumped laser cavity A monolithic pumped laser cavity design is disclosed. Elements of the laser cavity, such as gain material, Q-switch, reflector, and outcoupler, are contact bonded together with a thermally conductive epoxy. The assembly is then operatively coupled to a heat sink (e.... | 04/12/2011 |
| 7903706 | Compact, thermally stable multi-laser engine Various embodiments of a multi-laser system are disclosed. In some embodiments, the multi-laser system includes a plurality of lasers, a plurality of laser beams, a beam positioning system, beam focusing optics, a thermally stable enclosure and a temperature control... | 03/08/2011 |
| 7869476 | Light source device, projector device, monitor device, and lighting device The controller 170 controls the output power of the semiconductor laser device 100a depending on the temperature of the semiconductor laser device 100a acquired by the temperature sensor 130. The controller 170 refere... | 01/11/2011 |
| 7869475 | Misalignment prevention in an external cavity laser having temperature stabilisation of the resonator and the gain medium The present invention relates to an external-cavity laser module comprising a thermoelectric cooler (TEC) including an upper carrier plate having an upper surface, said TEC being configured to stabilize the temperature of the upper surface at a substantially constan... | 01/11/2011 |
| 7864824 | Multiple distributed feedback laser devices Provided is a multiple distributed feedback laser device. The laser device includes an active layer, a first diffraction grating, and a second diffraction grating. The substrate includes a first distributed feedback region, a modulation region, and a second distribu... | 01/04/2011 |
| 7839907 | Laser driving apparatus Laser driving apparatus in which a temperature is controlled such that an optical output is maximum, even when a laser device using an optical wavelength conversion element is used in a backlight source of a liquid crystal display that adjusts light dynamically. Cur... | 11/23/2010 |
| 7830933 | Optical transmitter providing a plurality of transmitter units each having a thermo-electric cooler connected in series to each other An optical transmitter with a plurality of transmitter units each providing a Peltier device is disclosed. The Peltier devices of the invention are connected in series with respect to the driver, accordingly, even when the Peltier devices show a relative low impedan... | 11/09/2010 |
| 7813391 | Method of controlling semiconductor laser A method of controlling a semiconductor laser that has a plurality of wavelength selection portions having a different wavelength property from each other and is mounted on a temperature control device, including: a first step of correcting a temperature of the temp... | 10/12/2010 |
| 7796657 | Optical module An optical module includes a laser device, a thermal conduction member, a Peltier device disposed between the laser device and the thermal conduction member, a heat radiation part, and a variable thermal-resistance device disposed between the thermal conduction memb... | 09/14/2010 |
| 7778295 | DBR laser with improved thermal tuning efficiency A distributed Bragg reflector (DBR) includes a base substrate and a gain medium formed on the base substrate. A waveguide positioned above the base substrate in optical communication with the gain medium and defines a gap extending between the base substrate and the... | 08/17/2010 |
| 7778294 | Optical disk apparatus and information recording method In an optical disk apparatus, by obtaining the temperature in the vicinity of a laser in the apparatus, the power source voltage of the laser driver is controlled such that power consumed by the headroom of the laser driver is reduced to the maximum extent without d... | 08/17/2010 |
| 7773645 | Uncooled external cavity laser operating over an extended temperature range A laser package comprising a semiconductor laser having an operating temperature range and a heater, wherein the heater is configured to heat the laser when the laser package is positioned in an environment having an ambient temperature which lies outside of the ope... | 08/10/2010 |
| 7769064 | Laser diode control method, laser diode control device, and information recording/playback apparatus Even though a laser diode is within the operation guarantee temperature range, the rise time characteristics required to protect and maintain the writing quality right away may not be present at a lower temperature. By sufficiently increasing the rise time, a laser ... | 08/03/2010 |
| 7760777 | DBR laser with improved thermal tuning efficiency A distributed Bragg reflector (DBR) includes a base substrate and a gain medium formed on the base substrate. A waveguide positioned above the base substrate in optical communication with the gain medium and defines a gap extending between the base substrate and the... | 07/20/2010 |
| 7756172 | Optically pumped semi-conductive laser In order to operate a laser amplifier system comprising a solid-state body thermally coupled to a cooling member and having a laser active volume area, in which at least one laser-active amplifier structure consisting of semiconductor material is arranged in at leas... | 07/13/2010 |
| 7738517 | Small form factor transmitter optical subassembly (TOSA) having functionality for controlling the temperature, and methods of making and using the TOSA The invention is directed to an OSA having a TO-can-type configuration that is relatively low-cost to manufacture and that has functionality for monitoring and controlling the temperature of the laser diode without the need for additional pins or an increase in the ... | 06/15/2010 |
| 7733931 | Light source device, projector device, monitor device, and lighting device The controller 170 controls the output power of the semiconductor laser device 100a depending on the temperature of the semiconductor laser device 100a acquired by the temperature sensor 130. The controller 170 refere... | 06/08/2010 |
| 7715454 | Method and apparatus for cooling a laser A laser includes a laser source and an power source arranged such that both components have substantially the same cross-section, with cooling fins arranged axially along the length of each element. The components are arranged end-to-end in a series to form an assem... | 05/11/2010 |
| 7701988 | Optical transmit assembly including thermally isolated laser, temperature sensor, and temperature driver An optical transmit assembly in which a laser and temperature sensor are mounted on a first substrate without other heat generating components. Other heat generating components may be mounted on a second substrate that is separated from the first substrate by a ther... | 04/20/2010 |
| 7688873 | Laser chips and vertical external cavity surface emitting lasers using the same Example embodiments may provide an increased efficiency laser chip and/or a vertical external cavity surface emitting laser (VECSEL) using the same. Example embodiment laser chips may include a substrate; a DBR (distributed Bragg reflector) layer on the substrate, a... | 03/30/2010 |
| 7680161 | Temperature compensated laser focusing optics A laser source assembly comprises a laser diode for generating a laser beam and a focusing lens for focusing the light beam. A spacer is provided for keeping the diode and the lens at a predetermined distance, and is made of a material of low expansion coefficient. ... | 03/16/2010 |
| 7680162 | Long wavelength vertical cavity surface emitting laser device and method of fabricating the same Provided is a vertical cavity surface emitting device. The surface emitting device includes a lower mirror layer emitting light having a long wavelength, an active layer providing an optical gain, a tunnel junction layer for confining a current, and an upper mirror ... | 03/16/2010 |
| 7680163 | Laser irradiating method including maintaining temperature of a lens A first mirror (5) that can be located at a reflection position (I) at which an optical path is blocked and a laser beam (a) is reflected, and a second mirror (6) that reflects the laser beam (a) which is reflected by the first mirror (5) are di... | 03/16/2010 |
| 7672346 | Narrow spectral width lasers optimized and temperature stabilized with volume Bragg grating mirrors Apparatus, methods, systems and devices for temperature independent or minimally temperature dependent narrow spectrum laser having an optimized output. The resonator includes at least one volume Bragg grating mirror that changes reflectance with temperature. The vo... | 03/02/2010 |
| 7660335 | Liquid cooled laser bar arrays incorporating diamond/copper expansion matched materials A laser diode array having a plurality of diode bars bonded by a hard solder to expansion matched spacers and mounted on a gas or liquid cooled heatsink. The spacers are formed of a material such as copper/diamond composite material having a thermal expansion that c... | 02/09/2010 |
| 7653099 | Semiconductor laser device which is capable of stably emitting short-wavelength laser light A semiconductor laser device according to the present invention includes: a semiconductor laser chip 1 for emitting laser light; a stem 3, 4 for supporting the semiconductor laser chip; a plurality of terminal electrodes, inserted in throughholes provi... | 01/26/2010 |
