Entries |
Document | Title | Date |
20080198882 | Active cooling of crystal optics for increased laser lifetime - A laser beam is generated and transmitted within an enclosed pathway through at least one crystal optic at a power density that progressively degrades transmissivity of the crystal optic with accumulating fluence. The crystal optics are cooled below normal operating temperatures to slow the progressive degradation in the transmissivity of the crystal optics with the accumulating fluence or to accommodate a higher power density without correspondingly increasing the progressive degradation in transmissivity. | 08-21-2008 |
20080205462 | SURFACE EMITTING LASER ARRAY, PRODUCTION PROCESS THEREOF, AND IMAGE FORMING APPARATUS HAVING SURFACE EMITTING LASER ARRAY - A surface emitting laser array comprising a plurality of surface emitting laser devices each having a semiconductor layer containing a first reflection mirror, an active layer, a current confined portion and a second reflection mirror. The laser array further comprises a first metal material layer for dissipating heat formed through a first insulating layer on the semiconductor layer and a second metal material layer for injecting current into the active layer formed through a second insulating layer on the first metal material layer. The first metal material layer is commonly shared by the plurality of the surface emitting laser devices. | 08-28-2008 |
20080212625 | SEMICONDUCTOR DEVICE - Disclosed is a semiconductor apparatus comprising an N-type material which cools a silicon semiconductor using the current flowing through the silicon semiconductor. | 09-04-2008 |
20080212626 | Semiconductor laser with reduced heat loss - Disclosed is a semiconductor laser. The semiconductor laser includes a semiconductor chip that includes an active layer and emits radiation in a main radiating direction. The active layer is structured in a direction perpendicular to the main radiating direction to reduce heating of the semiconductor chip by spontaneously emitted radiation, and the active layer has the form of a mesa that comprises side walls that form a resonator in such a way as to reduce the spontaneous emission in the active layer in a direction perpendicular to the main radiating direction. | 09-04-2008 |
20080219305 | Method and Installation for Laser Cutting/Welding - A laser cutting/welding installation including a laser head configured to deliver a laser beam designed to generate a solder bath, the installation also including a cooling device for the laser head. The cooling device includes at least one vortex tube, supplied with compressed gas, the tube including at least one cold gas outlet connected to the laser head for cooling thereof and at least one hot gas outlet. | 09-11-2008 |
20080247430 | Laser wavelength stabilization - In a coarse wavelength division multiplexing (CWDM) optical transmission system, a distributed feedback (DFB) laser is tuned so that the peak reflection of the grating overlaps with the gain range of the DFB laser. The diffraction grating is tuned so that the peak is positioned on the long wavelength end of the gain spectrum at a selected temperature. The optical transmission system operates in an environment having a wide temperature range (i.e., about −40° C. to about 85° C.). Heat is applied to the laser and as the laser temperature increases, the gain range overtakes the grating peak. When the gain range and the grating peak overlap at increased laser temperature, laser output is improved. | 10-09-2008 |
20080247431 | Optical Mount for Laser Rod - An optical mount for holding an optical element, such as a laser rod, in which two or more contact blocks are biased into contact with two faces of the optical element and with a base supporting the optical element. The optical mount maintains good thermal contact with the optical element to minimize thermal gradients. | 10-09-2008 |
20080267233 | RESISTIVE HEATING ELEMENT FOR ENABLING LASER OPERATION - Heating resistor used to control laser operation. A laser package, such as a Transmitter Optical Subassembly (TOSA) includes a substrate. A laser is disposed on the substrate. A resistive heating element is disposed on the substrate with the laser. Control circuitry is connected to the resistive heating element. The control circuitry is configured to cause current flow through the resistive heating element based on temperature conditions. Current flow through the resistive heating element causes an increase in the operating temperature of the laser. This can be used to increase the effective operating temperature range of a laser. | 10-30-2008 |
20080273561 | Method for Forming Anti-Reflective Coating - A system and method of minimizing the amount of power that is used by an optoelectronic module is disclosed. The system uses a thermoelectric cooler (TEC) to maintain a case temperature of the module at about 50° C. This allows the TEC to operate in the much more efficient heating mode, thus minimizing the amount of current being used to maintain the module temperature. The method includes the steps of determining a temperature range and operating temperature for an optoelectronic module, such that a maximum current level is not exceeded. In one exemplary embodiment, an operating temperature of about 50° C. with a temperature range of from about −5° C. to about 75° C. allows a maximum current of about 300 mA. | 11-06-2008 |
20080279237 | DYNAMIC THERMAL MANAGEMENT OF LASER DEVICES - The present invention generally relates to dynamic thermal management of a device. In one aspect, a method for thermally controlling a device is provided. The method includes setting a value of a set point in a thermoelectric cooler, wherein the set point corresponds to a first operating state. The method also includes monitoring a condition of the device to determine if the device is in the first operating state or a second operating state. Additionally, the method includes dynamically altering the value of the set point according to an algorithm upon determination that the device is in the second operating state. In another aspect, a method for dynamically controlling a device having a thermoelectric cooler is provided. In yet a further aspect, a system for dynamic thermal management of a device is provided. | 11-13-2008 |
20080279238 | ILLUMINATION APPARATUS, DISPLAY APPARATUS AND PROJECTION DISPLAY APPARATUS - An illumination apparatus includes: a solid-state light source; a Peltier element configured to cool the solid-state light source; a light amount sensor configured to detect an amount of a light emitted from the solid-state light source; a power consumption monitor configured to monitor power consumptions of the solid-state light source and the Peltier element; and a power controller configured to control powers supplied to the solid-state light source and the Peltier element. The power controller controls the powers supplied to the solid-state light source and the Peltier element, on the basis of the light amount detected by the light amount sensor and a sum of the power consumptions of the solid-state light source and the Peltier element. | 11-13-2008 |
20080291954 | 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 source operation, an optical window permitting light emergence outside from the cooling chamber; and an optical unit accommodated in the optical path of light emitted by said light source and enabling emergence of this light through said optical window outside from the cooling chamber. | 11-27-2008 |
20090003397 | OPTICAL DEVICE, AND SEMICONDUCTOR LASER OSCILLATOR - In an optical device, a slab layer includes an active layer sandwiched between cladding layers. The slab layer has a periodic refractive index profile structure in a two-dimensional plane, as a two-dimensional slab photonic crystal structure, and a linear defect region serving as a waveguide in the periodic refractive index profile structure. Regions having different widths of the waveguides, as segments of the waveguide, are connected in series. | 01-01-2009 |
20090022190 | Heat capacity laser and associated lasing medium - A heat capacity laser having a solid lasing medium, at least one pumping source that is able to emit a pumping radiation, and an optical cavity that can be characterized by having: at least one device able to homogenize the pumping radiation, a doped lasing medium having a body with a first and a second end and being stretched in the length by more than 6 cm and whose height in cross section is less than its stretching in the length of the lasing medium. The doping concentration in the lasing medium may vary axially. Also either the cavity can have beam forming optics and the doping concentration of the lasing medium is radially uniform, or the cavity can have no beam forming optics and the lasing medium has a doping concentration that may vary radially. | 01-22-2009 |
20090041073 | 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 waveguide along a substantial portion of the length thereof The waveguide having a grating formed therein. A heating element is in thermal contact with the waveguide and electrically coupled to a controller electrically configured to adjust optical properties of the waveguide by controlling power supplied to the heating element. | 02-12-2009 |
20090052482 | COOLING AN ACTIVE MEDIUM USING RAMAN SCATTERING - A method is described for setting up a system comprising an active medium. The method comprises thermally controlling the system comprising an active medium by radiative cooling. The radiative cooling thereby is based on stimulated and/or coherent Raman scattering processes. In particular embodiments, the thermally controlling may be obtained by tailoring the efficiencies of the Raman scattering processes by optimising at least one of a number of system parameters. The invention furthermore relates to systems thus obtained, to methods for thermally controlling systems comprising an active medium that generate radiation and to computer program products for performing the methods for setting up systems comprising an active medium and thermally controlled by radiative cooling using stimulated and/or coherent Raman scattering processes. | 02-26-2009 |
20090059978 | 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 diode control method of the present invention makes it possible to write readily. A laser diode control device includes a temperature sensor for detecting temperature of a laser diode. When a detected temperature by the temperature sensor is equal to or below a predetermined value within the operation guarantee temperature range, a seek motor controls the position of a pickup to move the pickup to a region outside a recording region of a recording medium. In this way, a current exceeding a threshold current value is supplied to the laser diode, and the writing operation starts after the laser diode temperature is increased up to a level where the rise time characteristics required to protect and maintain the writing quality is present. | 03-05-2009 |
20090074020 | DBR laser with improved thermal tuning effciency - 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 waveguide along a substantial portion of the length thereof. The waveguide may have a grating formed therein. A heating element is in thermal contact with the waveguide and electrically coupled to a controller configured to adjust optical properties of the waveguide by controlling power supplied to the heating element. | 03-19-2009 |
20090074021 | 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 be stable and without unintentional shifts in wavelength. | 03-19-2009 |
20090103580 | Vertically displaced stack of multi-mode single emitter laser diodes - An optical source comprised of a stack of at least two laser diode subassemblies is provided. Each laser diode subassembly includes a submount and a multi-mode, single emitter laser diode. Each of the at least two laser diode subassemblies is mounted to a stepped mounting member such that the output beams from the at least two laser diode subassemblies are vertically displaced along the z-axis, horizontally displaced along the y-axis, and not horizontally displaced along the x-axis. | 04-23-2009 |
20090110014 | 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 size of the OSA. Thus, the OSA typically includes four or five pins at most. These features of the invention are achieved by providing a thermal control circuit, a temperature sensor and a heater that are integrated along with a laser output power monitor photodiode into the submount assembly substrate. | 04-30-2009 |
20090135866 | OPTICAL TRANSMISSION CIRCUIT - An optical transmission circuit includes a light emitting device ( | 05-28-2009 |
20090135867 | 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 according to the predetermined linear-fitting power curve to read/write data. Next, the temperature of the disk drive is detected. Then, whether the temperature has changed is checked. If the temperature has not changed, the method continues to read/write data. If the temperature has changed, the method obtains a relative slope from the slope curve by use of the temperature of the disk drive, displaces the slope of the predetermined linear-fitting power curve with the obtained relative slope to form a new linear-fitting power curve for replacing the predetermined linear-fitting power curve, and controls the output of laser power. | 05-28-2009 |
20090141756 | Adaptive Thermal Feedback System for a Laser Diode - According to one embodiment of the disclosure, a thermal feedback system comprises an adaptive controller coupled to a heater element and a temperature sensor. The heater element and the temperature sensor are thermally coupled to a laser diode. The adaptive controller estimates an estimated error according to a measured temperature from the temperature sensor, and determines a target from the estimated error and a temperature reference. The adaptive controller adjusts an input to the transfer function model according to the target to decrease the estimated error. The input to the transfer function model drives the heater element. | 06-04-2009 |
20090141757 | OPTICAL AMPLIFIERS - An optical amplifier comprises an optical fibre, a pump laser for optically pumping the optical fibre to amplify an optical signal, a TEC | 06-04-2009 |
20090147810 | Method for controlling a temperature of a thermo-electric cooler and a temperature controller using the same - The present invention is to provide a control algorithm of a thermo-electric cooler (TEC) for a laser diode (LD) where a rush current accompanied with the stepwise change of the target temperature of the TEC. First, the controller stops the TEC driver prior to the setting of the target temperature, and sets the present temperature of the LD. Subsequently, the controller gradually increases the reference temperature of the TEC in stepwise to the target temperature. Thus, the controller suppresses the rush current accompanied with the instantaneous increase of the reference temperature of the TEC. | 06-11-2009 |
20090147811 | 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 switching section for switching a temperature of a wavelength conversion element according to a harmonic wave output level as set in the output setting device, wherein the element temperature switch section includes an element temperature holding section that holds the wavelength conversion element at the temperature as switched by the element temperature switching section. | 06-11-2009 |
20090168819 | VERTICAL-CAVITY SURFACE-EMITTING LASER DIODE DEVICE - A vertical-cavity surface-emitting laser diode (VCSEL) device, including a laser element portion formed on a substrate, the laser element portion comprising a multi-layer reflective mirror of a first conductivity type, an active layer, and a multi-layer reflective mirror of a second conductivity type, and a light absorbing heat converting region at a position thermally connected to the laser element portion on the substrate, the light absorbing heat converting region absorbing light and generating heat. | 07-02-2009 |
20090168820 | Mitigated Temperature Gradient-Distributed Bragg Reflector - A semiconductor laser system comprising a gain region, a gain contact coupled to the gain region, and a distributed Bragg reflector (DBR) having a near side and a far side with respect to the gain region are provided. The DBR reflects a resonant frequency of light back into the gain region. The semiconductor laser system further comprises a heat conducting structure, wherein the heat-conducting structure is positioned to transfer heat in a direction from the near side to the far side of the DBR grating, and an outcoupler, positioned to outcouple the resonant frequency of light from the semiconductor laser system. | 07-02-2009 |
20090168821 | THERMAL SHUNT FOR ACTIVE DEVICES ON SILICON-ON-INSULATOR WAFERS - An optimized structure for heat dissipation is provided that may include two types of thermal shunts. The first type of thermal shunt employed involves using p and n metal contact layers to conduct heat away from the active region and into the silicon substrate. The second type of thermal shunt involves etching and backfilling a portion of the silicon wafer with poly-silicon to conduct heat to the silicon substrate. | 07-02-2009 |
20090185591 | SEMICONDUCTOR DEVICE - In a semiconductor device where a semiconductor element having an asymmetric temperature distribution during an operation is mounted, inner leads on the right and left ends have asymmetric lengths, so that the right and left regions of a semiconductor element mounting part have different sizes. The semiconductor element is mounted so as to have a high-temperature region side in a wide region of the mounting part, and the inner leads are wire bonded at the center to the wide region of the mounting part. It is thus possible to provide a small semiconductor device in which a long semiconductor element is mounted with heat dissipation. | 07-23-2009 |
20090213885 | DIFFUSION-COOLED CO2 LASER WITH FLEXIBLE HOUSING - A gas includes a housing having a symmetrical arrangement of upper and lower cooling members for removing heat generated in a gas-discharge excited by an electrode assembly. The electrode assembly is clamped between the cooling members and is itself essentially symmetrically arranged. The cooling members and the electrode assembly are mechanically isolated in the housing by a surrounding diaphragm-like arrangement that connects the cooling members to side-walls of the housing. An RF power-supply for supplying the electrode assembly is mounted on one of the sidewalls to avoid disturbing the symmetry of the cooling and electrode arrangements. | 08-27-2009 |
20090232173 | Optical semiconductor apparatus - An optical semiconductor apparatus includes: an optical semiconductor element that outputs light; a lens that transmits light output from the optical semiconductor element; and a support member that is integrally formed and includes a first support supporting the optical semiconductor element, a second support supporting the lens, and an intermediate portion through which the first support and the second support are integrated. | 09-17-2009 |
20090252188 | 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 stabilise the temperature of the upper surface at a substantially constant temperature. The laser module further comprises a laser assembly mounted on an optical bench, which is in thermal coupling with said upper surface, said laser assembly comprising a gain medium for emitting an optical beam into the external cavity and an end mirror. | 10-08-2009 |
20090262767 | 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 closely matches that of the laser bars. | 10-22-2009 |
20090279577 | Multi-pass laser amplifier with staged gain mediums of varied absorption length - A laser amplification system is disclosed that enables reliable operation over large ambient temperature operating window, as well as a significant reduction of laser temperature sensitivity typically associated with diode pumped lasers. The techniques employed by the system effectively eliminate damaging gain hot spots and lower ASE and ESA thresholds, thereby increasing laser peak and average power levels. Additionally, the techniques allow for thermal programming of active gain medium material to minimize thermally induced aberrations. In one particular example embodiment, a variable dopant concentration multi-pass laser amplifier is provided having a customized active ion concentration profile, tailoring the combination of laser absorption and gain distribution using a ceramic YAG host. | 11-12-2009 |
20090285251 | PLANAR LIGHTWAVE CIRCUIT AND TUNABLE LASER DEVICE HAVING THE SAME - To prevent the property of an optical filter from being changed even if there is a change in a gap of directional couplers generated due to variations in manufacturing conditions so as to improve the yield. A tunable laser device includes a PLC and an SOA. The PLC includes: optical waveguides; an optical filter; a loop mirror; thin-film heaters; and asymmetrical MZIs. Optical coupling parts within the PLC are formed with the asymmetrical MZIs, so that there is no change generated in the property of the optical filter even if there is a change generated in a gap of the directional couplers due to variations in the manufacturing conditions. Therefore, the yield can be improved. | 11-19-2009 |
20090296761 | Optical device including a bimorph-type piezoelectric element - An optical device includes optical parts including a laser diode element accommodated in a housing. A bimorph-type piezoelectric element is arranged in a vicinity of the laser diode element and has a free end contacting one of the laser diode element, a support member supporting the laser diode element, and the housing. A control circuit controls an operation of the bimorph-type piezoelectric element. | 12-03-2009 |
20090296762 | 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 emitting laser is electrically connected to a mount portion of the ceramic package. The mount portion is electrically connected to a back-surface electrode on the back surface of the ceramic package. The mount portion is also thermally connected to a back-surface heat-dissipating electrode on the back surface of the ceramic package via a penetrating electrode that penetrates the ceramic package. The surface emitting laser is spaced apart from the penetrating electrode in order to prevent inclination in light-emitted direction. The back-surface heat-dissipating electrode prevents destruction of a soldered portion when the light emitting apparatus is mounted on a substrate by soldering. | 12-03-2009 |
20090316740 | Light Source That Utilizes Small Footprint Reference Gas Cells for Multiple Laser Frequency Stabilization - A light source and the method for operating the same are disclosed. The light source includes first and second lasers, and first and second wavelength control assemblies. The lasers emit first and second light beams, respectively, at wavelengths that are determined by first and second wavelength control signals. First and second beam splitters split the first and second light beams, respectively, to create first and second sampling light beams. The first and second wavelength control assemblies receive sampling light beams and generate the first and second wavelength control signals such that the wavelengths of the first and second light beams differ by no more than a predetermined amount. The first and second wavelength control assemblies each include an absorption cell having a gas that has an optical absorption that varies with the wavelength of the first and second sampling light beams at wavelengths around the output wavelength of the light source. | 12-24-2009 |
20090316741 | Temperature control apparatus and optical transmission device using same - A temperature control apparatus that performs stabile temperature control operation, besides avoiding generation of unwanted noise. A thermo-control device cools or heats an object according to a supply current that a thermo-control driver provides according to a specified control voltage. A temperature sensor observes the temperature of the object. A variable voltage controller varies the control voltage such that the observed temperature of the object will be a specified reference temperature. The variable voltage controller begins to operate in alternate setting mode when the control voltage is expected to enter a voltage range in which the thermo-control driver could malfunction. During that mode, the variable voltage controller outputs a first control voltage and a second control voltage alternately at predetermined intervals. The first and second control voltages are malfunction-free voltages near the malfunction-prone voltage range. | 12-24-2009 |
20090316742 | 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 grating to mechanically and periodically vary, or causes return light, which varies periodically or non-periodically, to be incident on the semiconductor laser. Since the periodical fluctuation is applied to the temperature of the semiconductor laser, the optical waveguide, or diffraction grating, the periodical mechanical variation is applied to the optical waveguide or the diffraction grating, or the return light is caused to be incident on the semiconductor laser, the semiconductor laser carries out a multimode oscillation from a low output to a high output without shifting between a single mode oscillation and a multimode oscillation. Accordingly, the present invention can provide a semiconductor laser device having IL characteristics in which a current is proportional to a light output and a driving method thereof. | 12-24-2009 |
20090323742 | 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 port; and an air-cooling fan that is attached to the housing and that discharges air taken in from the intake port to the exhaust port. The cooling fins are arranged at a position opposed to the intake port to be stacked up on each other at predetermined intervals and a pitch between the cooling fins is equal to or less than a minimum width of the intake port. | 12-31-2009 |
20100008389 | Inverted composite slab sandwich laser gain medium - The present invention pertains to a composite slab laser gain medium with an undoped core and at least one doped gain medium section disposed on at least one side of that core. The gain medium is constructed so as to mitigate the effects of thermal and mechanical stresses within it and also allow for impingement cooling of the doped gain medium section. | 01-14-2010 |
20100014547 | Device For Longitudinal Pumping Of A Laser Medium - The invention concerns a device for longitudinal pumping of an amplifying laser medium comprising at least one laser diode capable of emitting at least one laser beam, means for focusing said laser beam onto said amplifying laser medium and means for collimating said laser beam capable of generating a collimated laser beam. The invention is characterized in that said focusing means comprise at least one mirror, said mirror being arranged such that said collimated beam is reflected towards the amplifying medium. | 01-21-2010 |
20100034225 | PROJECTION DISPLAY APPARATUS - In a projection display apparatus in which a laser beam source and an optical engine are connected together through an optical fiber, safety is improved against temperature rise in the optical fiber and its periphery. A projection display apparatus includes a temperature sensor | 02-11-2010 |
20100054289 | Solid-state laser - A method for assembling an optically pumped solid-state laser having an extended cavity is disclosed. The method comprises the steps of providing a casing, mounting a TEC and a base plate in the casing, and mounting a plurality of laser components on the base plate using a UV and heat curing adhesive. Once the laser components are correctly positioned and aligned on the base plate, the adhesive is pre-cured using UV radiation. Final curing of the adhesive is obtained by subjecting the entire laser package to an ambient temperature of at least 100° C. The base plate is preferably selected to have a CTE similar to that of the laser components in order to facilitate the high temperature curing. A preferred material for the base plate is AlSiC. | 03-04-2010 |
20100074285 | Microchannel Cooler For High Efficiency Laser Diode Heat Extraction - A laser diode package includes a laser diode, a cooler, and a metallization layer. The laser diode is used for converting electrical energy to optical energy. The cooler receives and routes a coolant from a cooling source via internal channels. The cooler includes a plurality of ceramic sheets and a highly thermally-conductive sheet. The ceramic sheets are fused together and the thermally-conductive sheet is attached to a top ceramic sheet of the plurality of ceramic sheets. The metallization layer has at least a portion on the thermally-conductive sheet. The portion is electrically coupled to the laser diode for conducting the electrical energy to the laser diode. | 03-25-2010 |
20100158057 | FEEDBACK CONTROL FOR HEATED TOSA - A closed loop system for controlling laser temperature without the need for additional sensors or other hardware. Embodiments utilize an existing automatic power feedback loop and existing sensors to determine the temperature of a TOSA based on changes in laser bias current, thus avoiding the need for the additional hardware. The automatic power feedback loop will modify the laser bias current as the temperature of the TOSA changes. That is, as the temperature increases, the amount of laser bias current is increased and as the temperature decreases, the amount of laser bias current is decreased. Thus, the laser bias current may be used as feedback for the laser temperature control. Accordingly, when the transceiver module drops below a predetermined temperature, a laser heater current may be controlled to thereby maintain the same laser bias current as at the preset temperature. | 06-24-2010 |
20100166029 | Apparatus for selectively distributing energy from a laser beam - An assembly for distributing laser energy is provided that is formed using a compact rigid housing with a sealed beam path contained therein. The assembly employs a monolithic housing with modular collimator and mirror switching components installed therein to reduce its size while maintaining a sealed beam path thereby reducing the possibility of contamination of the beam path. Other than the optics and mirror, there are no elements of the distribution device contained within the beam path. In one embodiment, the assembly distributes incoming energy from a single source to one or more outputs. In another embodiment, the assembly operates as a beam combiner to direct energy from one or more sources to a single output. | 07-01-2010 |
20100208758 | Light source device, projector device, monitor device, and lighting device - The controller | 08-19-2010 |
20100246620 | LASER DEVICE - A laser device includes: an optical modulator that is optically coupled to a semiconductor laser mounted on a first mounting portion; a second mounting portion that is separately away from the first mounting portion; a bridge that couples the first mounting portion and the second mounting portion; a driver IC that is mounted on the second mounting portion and drives the optical modulator through a transmission pathway provided on the bridge; and a capacitor that is provided on the bridge and is coupled to the transmission pathway. | 09-30-2010 |
20100309940 | HIGH POWER LASER PACKAGE WITH VAPOR CHAMBER - A heat spreader structure includes a high power laser with an epi side and an emitting facet. A vapor chamber includes a housing defining an inner vapor cavity and a wick positioned in the vapor cavity to define an evaporation area on one side of the cavity, a condensation area on an opposite side of the cavity, and fluid communication between the condensation area and the evaporation area. A space defined between the evaporation area and the condensation area. The wick includes a porous powder sintered to inner surfaces of the sealed cavity to hold the porous powder in position. The epi side of the laser is coupled to the one side of the vapor chamber and heat removal mechanism is coupled to the opposite side of the cavity. | 12-09-2010 |
20110007761 | TEMPERATURE CONTROL DEVICE FOR OPTOELECTRONIC DEVICES - 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. | 01-13-2011 |
20110051758 | HIGH POWER SEMICONDUCTOR LASER DIODES - A high power laser source comprises at least a bar of laser diodes with a first coefficient of thermal expansion (CTE | 03-03-2011 |
20110096802 | HIGH POWER RADIATION SOURCE WITH ACTIVE-MEDIA HOUSING - A high power source of electro-magnetic radiation having a multi-purpose housing is disclosed. The multi-purpose housing includes an interior filled with a material forming at least a light source and further comprising a reflector which can envelope a laser rod surrounded by light sources for providing light excitation to the laser rod. A material defining outer surfaces of the light sources extends out to and defines outer surfaces of the reflector. A high-reflectivity coating is disposed over an outer surface of the reflector, as is a protective coating. Also disposed over an outer surface of the reflector can be an optional heat sink, with cooling being performed by an optional arrangement of forced-air traveling over the heat sink. The light sources may be light source pumps, and the high-reflectivity coating may be formed to envelop the reflector. | 04-28-2011 |
20110134948 | Semiconductor laser chip, semiconductor laser device, and semiconductor laser chip manufacturing method - Provided is a semiconductor laser chip improved more in heat dissipation performance. This semiconductor laser chip includes a substrate, which has a front surface and a rear surface, nitride semiconductor layers, which are formed on the front surface of the substrate, an optical waveguide (ridge portion), which is formed in the nitride semiconductor layers, an n-side electrode, which is formed on the rear surface of the substrate, and notched portions, which are formed in regions that include the substrate to run along the optical waveguide (ridge portion). The notched portions have notched surfaces on which a metal layer connected to the n-side electrode is formed. | 06-09-2011 |
20110134949 | 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, a thermally stable enclosure, and a temperature controller. The thermally stable enclosure is substantially made of a material with high thermal conductivity such as at least 5 W/(m K). The thermally stable enclosure can help maintain alignment of the laser beams to a target object over a range of ambient temperatures. | 06-09-2011 |
20110142086 | OPTICAL MODULE WITH ENHANCED ROBUSTNESS OF TEMPERATURE CONTROLLING DEVICE - An optical assembly (OSA) that installs a semiconductor optical device mounted on a thermo-electric controller (TEC) is disclosed. The TEC in the upper plate thereof is mechanically connected to the housing, or to the block stiffly fixed to the housing by a bridge made of stiff material. The bridge preferably extends along the optical axis to show enhanced durability against the impact caused by an external ferrule abutting against the receptacle of the OSA. | 06-16-2011 |
20110158271 | LASER RESONATOR GAIN MEDIUM SECUREMENT - A laser resonator comprises a cylindrical gain medium, a cooling system and a coupling member. The cylindrical gain medium comprises a central axis, an outer side surface, two opposing end faces and a first depression in the outer side surface. The cooling system comprises a cooling jacket disposed around the gain medium that defines a cooling cavity, in which cooling fluid is guided over the side surface of the gain medium. In one embodiment, the cooling jacket comprises a second depression. The coupling member is received within the first and second depressions. Movement of the first depression along the central axis relative to the cooling jacket is restricted by the coupling member. | 06-30-2011 |
20110164634 | SEMICONDUCTOR LASER DEVICE - A semiconductor laser device includes: a semiconductor laser; a carrier that has a carrier side face facing with a longitudinal direction of the semiconductor laser, has a carrier edge area, and has a first bonding area that is the closest to a first end of the semiconductor laser and a second bonding area that is the closet to a second end of the semiconductor laser; a first thermal conduction portion that has a first thermal resistance and couples between the first bonding area and an outer connection terminal; and a second thermal conduction portion that has a second thermal resistance smaller than the first thermal resistance and couples between the second bonding area and an outer connection terminal, wherein the first end side of the semiconductor laser is closer to the carrier side face than the second end side of the semiconductor laser. | 07-07-2011 |
20110188524 | DESIGNS AND PROCESSES FOR THERMALLY STABILIZING A VERTICAL CAVITY SURFACE EMITTING LASER (VCSEL) IN A CHIP-SCALE ATOMIC CLOCK - Designs and processes for thermally stabilizing a vertical cavity surface emitting laser (vcsel) in a chip-scale atomic clock are provided. In one embodiment, a Chip-Scale Atomic Clock includes: a vertical cavity surface emitting laser (vcsel); a heater block coupled to a base of the vcsel; a photo detector; a vapor cell, wherein the vapor cell includes a chamber that defines at least part of an optical path for laser light between the vcsel and the photo detector; and an iso-thermal cage surrounding the vcsel on all sides, the iso-thermal cage coupled to the heater block via a thermally conductive path. | 08-04-2011 |
20110188525 | TERAHERTZ WAVE EMISSION LASER DEVICE - A laser device having a wave emission within a frequency range of 0.5 to 5 THz, includes a semiconductor heterostructure having a cylindrical form with a circular cross-section and including: a first optically nonlinear semiconductor material layer including an emitting medium configured to emit at least two optical whispering gallery modes belonging to the near-infrared spectrum, the two whispering gallery modes being confined within the first layer and enabling the generation, within the first layer, of radiation within an electromagnetic whispering gallery mode having a frequency of 0.5 to 5 THz, the radiation being obtained through the difference in frequency of the two whispering gallery modes, the cylindrical geometry of the heterostructure ensuring phase tuning between the two optical whispering gallery modes belonging to the near-infrared spectrum and the terahertz mode at the difference in frequency; a second and a third semiconductor material layer, each having an optical index weaker than the index of the material of the first layer and located on both sides of the first layer; at least one metal layer located on one end of the hetero structure. | 08-04-2011 |
20110211603 | Laser wavelength stabilization - In a coarse wavelength division multiplexing (CWDM) optical transmission system, a distributed feedback (DFB) laser is tuned so that the peak reflection of the grating overlaps with the gain range of the DFB laser. The diffraction grating is tuned so that the peak is positioned on the long wavelength end of the gain spectrum at a selected temperature. The optical transmission system operates in an environment having a wide temperature range (i.e., about −40° C. to about 85° C.). Heat is applied to the laser and as the laser temperature increases, the gain range overtakes the grating peak. When the gain range and the grating peak overlap at increased laser temperature, laser output is improved. | 09-01-2011 |
20110216793 | LASER DIODE STRUCTURE WITH REDUCED INTERFERENCE SIGNALS - A laser diode structure for generating a collimated or divergent laser beam, preferably for application in gas detection, with a laser diode arranged in a closed housing, with the housing comprising a housing bottom, an exit window, electrical connections, a temperature control device for the laser diode, and an optical element for influencing the laser beam. The temperature control device carrying the laser diode is arranged on the housing bottom and the optical element is positioned at a distance from the laser diode. The invention proposes an electrically controllable power device for the cyclic alteration of the position and/or alignment of the optical element in relation to the laser diode so that the optical path length for the laser beam in the housing changes periodically. The oscillating motion of the optical element has the effect of time-averaging the etalon and/or self-mixing effects caused by the back-reflections of the laser beam in the housing, thereby reducing the optical noise of the laser diode structure. | 09-08-2011 |
20110235662 | OPTICAL PUMPING STRUCTURE - An optical pumping structure for lasers includes: an active medium in the form of a cylindrical rod with a circular cross-section, said rod being inserted at its ends into two rings made of a thermally conductive material; at least three stacks of pumping diode strips arranged in the form of a star around the rod; and a support temperature-regulated by a Peltier-effect module. The rings are in contact with the support, and a stack of diodes, called bottom stack, being situated between the rod and the support, and the structure comprises, for each other stack, a thermal conduction block forming a support for said stack, these blocks being mounted on the cooled support and not being in contact with one another or with the rings. | 09-29-2011 |
20110243167 | Temperature Measurement And Control For Laser And Light-Emitting Diodes - The existing diodes in an LED or laser diode package are used to measure the junction temperature of the LED or laser diode. The light or laser emissions of a diode are switched off by removing the operational drive current applied to the diode package. A reference current, which can be lower the operational drive current, is applied to the diode package. The resulting forward voltage of the diode is measured using a voltage measurement circuit. Using the inherent current-voltage-temperature relationship of the diode, the actual junction temperature of the diode can be determined. The resulting forward voltage can be used in a feedback loop to provide temperature regulation of the diode package, with or without determining the actual junction temperature. The measured forward voltage of a photodiode or the emissions diode in a diode package can be used to determine the junction temperature of the emissions diode. | 10-06-2011 |
20110286481 | 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 absorbs heat during the phase transition. Once the laser diode is turned off, the liquid metal cools off and resolidifies. The reservoir is designed such that that the liquid metal does not leave the reservoir even when in liquid state. The laser diode assembly further includes a lid with one or more fin structures that extend into the reservoir and are in contact with the metal in the reservoir. | 11-24-2011 |
20110299559 | OPTICAL DEVICE - When environmental temperature becomes low, the quantity of light of the backward output light irradiated onto a light absorber formed on a mount over which a chip is mounted, is increased by a light quantity adjuster, to increase the optical absorption by the light absorber, thereby raising its temperature. As a result, the temperature of the chip on the mount rises, thereby enabling to substantially narrow a temperature range on a low temperature side. Accordingly, an optical device with low power consumption that can satisfy characteristics required for signal transmission at a required rate over a wide temperature range can be provided. | 12-08-2011 |
20120008654 | LASER GAIN MEDIUM AND LASER OSCILLATOR USING THE SAME - A laser gain medium includes an optical medium configured to transmit a laser beam and having an incident face, a first face, a second face opposing to the first face; and gain media configured to amplify the laser beam while reflecting the laser beam. At least one of the gain media is joined on a first face of the optical medium as a first face gain medium, and at least one of the remaining gain media is joined on a second face of the optical medium as a second face gain medium. The laser beam is incident into the optical medium, and is amplified by the first face gain medium and the second face gain medium while being alternately reflected by the first face gain medium and the second face gain medium. | 01-12-2012 |
20120020379 | SEMICONDUCTOR LASER MODULE AND SUPPRESSION MEMBER - Above a Peltier element disposed on a bottom of a case, bases that are platy members of two or more layers and have different expansion coefficients from each other are stacked. At least on a partial region of the base serving as an uppermost layer, a suppression member having an expansion coefficient different from that of the base serving as the uppermost layer is further provided. An optical element is disposed on the base and/or the suppression member. Even when a warp is likely to occur in the Peltier element, a stacked-plate structure of the base, the base, and the suppression member suppresses an occurrence of such a warp, whereby warps hardly occur in the base and the suppression member, and a shift hardly occurs in an optical axis between a beam splitter and an etalon. | 01-26-2012 |
20120033692 | OPTICAL PUMPING OF A SOLID-STATE GAIN-MEDIUM USING A DIODE-LASER BAR STACK WITH INDIVIDUALLY ADDRESSABLE BARS - A diode-laser bar stack includes a plurality of diode-laser bars having different temperature dependent peak-emission wavelengths. The stack is arranged such that the bars can be separately powered. This allows one or more of the bars to be “on” while others are “off”. A switching arrangement is described for selectively turning bars on or off, responsive to a signal representative of the temperature of the diode-laser bar stack, for providing a desired total emission spectrum. | 02-09-2012 |
20120087384 | COMPONENT TEMPERATURE CONTROL - There is disclosed an electronic apparatus comprising a chip within a casing. A thermoelectric cooler has thermal connections to the chip and the casing and is configured to transport heat from the chip to the casing. A temperature measuring device is provided for determining the temperature of the chip. A control system is configured to maintain the chip at a target temperature by controlling current supplied to the thermoelectric cooler in response to the measured temperature. A temperature selection system is configured to select the chip target temperature dynamically on the basis of the casing temperature. | 04-12-2012 |
20120087385 | FLARE FOR BATTLEFIELD ILLUMINATION - An infrared flare includes at least one diode laser configured to emit radiation in a near-infrared spectrum and an optical system configured to transform the radiation output from the at least one diode laser. Each of the at least one diode lasers are coupled to a laser mount. The infrared flare further includes a thermal management system configured to absorb waste heat generated by the at least one diode laser. The thermal management system is configured to maintain the laser mount at or below 60° C. during operation of the infrared flare. | 04-12-2012 |
20120120974 | 6 KHZ AND ABOVE GAS DISCHARGE LASER SYSTEM - A system and method of operating a high repetition rate gas discharge laser system. The system includes a gas discharge chamber having a hot chamber output window heated by the operation of the gas discharge laser chamber, an output laser light pulse beam path enclosure downstream of the hot chamber window and comprising an ambient temperature window, a cooling mechanism cooling the beam path enclosure intermediate the output window and the ambient window. The gas discharge chamber can include a longitudinally and axially compliant ground rod, including a first end connected to a first chamber wall, a second end connected to a second chamber wall, the second chamber wall opposite the first chamber wall and a first portion formed into a helical spring, the ground rod providing mechanical support for a preionizer tube. | 05-17-2012 |
20120120975 | DIODE-PUMPED CAVITY - A side-pumped, diode-pumped solid-state laser cavity includes a conductively cooled housing having an opening for pump radiation from a diode array in close proximity to a laser rod. The pump light is absorbed by the rod and excites the laser ions. The cavity includes a thin, diffuse reflector encircling the rod, having a shaped opening for the collection and redirection of the pump light into the rod, and a good heat conductor as the heat sink and heat conductor. A split heat sink inhibits the flow of heat from the pump diodes into the laser rod, and pre-formed air spacings are designed to provide uniform temperature distribution around the laser rod. | 05-17-2012 |
20120120976 | 3D OPTOELECTRONIC PACKAGING - An optoelectronic (OE) package or system and method for fabrication is disclosed which includes a silicon layer with a wiring layer. The silicon layer has an optical via for allowing light to pass therethrough. An optical coupling layer is bonded to the silicon layer, and the optical coupling layer includes a plurality of microlenses for focusing and or collimating the light through the optical via. One or more first OE elements are coupled to the silicon layer and electrically communicating with the wiring. At least one of the first OE elements positioned in optical alignment with the optical via for receiving the light. A second OE element embedded within the wiring layer. A carrier may be interposed between electrical interconnect elements and positioned between the wiring layer and a circuit board. | 05-17-2012 |
20120147913 | LASER CRYSTAL COMPONENTS JOINED WITH THERMAL MANAGEMENT DEVICES - A method for preparing a surface of a YAG crystal for thermal bonding includes performing an ion implantation process to introduce nitrogen into a surface layer of the YAG crystal to replace depleted oxygen therein, to change surface energy of the surface layer of the YAG crystal and to provide desired bonding characteristics for the surface layer; and joining the ion implanted surface layer with a thermal management device configured to dissipate heat from the YAG crystal. Also, a micro-chip device having a YAG crystal whose surface is prepared with the above disclosed method is provided and a device for forming a metallization pattern on a surface of the YAG crystal is provided. | 06-14-2012 |
20120163405 | LOW CHIRP COHERENT LIGHT SOURCE - A coherent light source having a semiconductor laser resonator and an optical amplifier which amplifies coherent light emitted by the semiconductor laser resonator in response to current injection, in which the amount of current injected into the semiconductor laser is controlled for conformity with a chirp requirement of an optical communication system. The optical amplifier, which introduces no chirp, may be controlled to match an optical power requirement of the optical communication system. A heater may be provided to introduce a low frequency chirp in order to suppress interferometric intensity noise and unwanted second-order effects such as stimulated Brillouin Scattering. The optical amplifier may be monolithically formed with the semiconductor laser resonator, with separate electrodes provided for injecting current into the semiconductor laser resonator and the optical amplifier. | 06-28-2012 |
20120287954 | Laser Array Light Source Unit - A laser array light source unit | 11-15-2012 |
20120300803 | HANDHELD LASER SMALL ARM - A hand-held laser weapon including: a laser module for generating a laser light; a telescope module fiber optically coupled to the laser module for focusing the laser light on a target; a burst power module, including a storage capacitor, for storing electrical energy capable of a rapid release in the form of a current; a trickle power module including a battery for providing said electrical energy to the burst power module; a drive circuit for driving the laser module with the stored electrical energy to generate the laser light; a trigger module for providing the stored electrical energy to the drive circuit; and a structure for coupling at least the laser module, the telescope module, the drive circuit and the trigger module together. | 11-29-2012 |
20130022065 | Gas Laser having Radial and Axial Gas Bearings - A fan for circulating laser gas in a gas laser, the fan having a shaft which is supported by at least one radial bearing and at least one axial gas bearing. The axial gas bearing has at least two rotating bearing faces, one or both being structured with a groove pattern, and at least two stationary bearing faces that are arranged at both sides of a plate. | 01-24-2013 |
20130022066 | LASER DEVICE AND METHOD FOR MANUFACTURING SAME - A laser device includes: a semiconductor laser element having an output surface; an optical fiber having a leading end portion facing the output surface of the semiconductor laser element; and an optical fiber supporting member for supporting the optical fiber, the optical fiber supporting member being made from a non heat insulating material and having a bonding pad to which the optical fiber is fixed by use of solder. The optical fiber supporting member includes a contact portion thermally in contact with a base. The bonding pad is (i) spaced apart from the contact portion so as to be located on a side opposite from the contact portion so that a region to which laser light is applied from another laser element when the optical fiber is fixed to the bonding pad is sandwiched between the bonding pad and the base and (ii) separated spatially from the base. | 01-24-2013 |
20130022067 | LASER DEVICE - The laser device includes a semiconductor laser element having an emission surface from which laser light is emitted, an optical fiber having an end part facing the emission surface, and an optical fiber supporting member which (i) supports the optical fiber and (ii) has a bonding pad to which the optical fiber is fixed by solder. The optical fiber supporting member includes a beam part having (i) a first main surface on which the bonding pad is provided and (ii) a second main surface opposite to the first main surface, and a pillar part which is fixed to a base and is joined to the beam part on an end portion of the beam part such that the second main surface and the base face each other while being spatially away from each other. | 01-24-2013 |
20130028278 | OPTICAL TRANSMITTER FOR STABILIZING OUTPUT WAVELENGTH - An optical transmitter implemented with an LD whose temperature is stably controlled is disclosed. A temperature of the LD is continuously monitored; and a difference from the target temperature and a time derivative thereof are calculated. When the time derivative becomes substantially zero, that is, the difference becomes an extremum, the convergent range for the time derivative is changed depending on the extremum, or an average of the current extremum and the previous extremum. | 01-31-2013 |
20130044775 | THERMAL CONDUCTION PATH FOR A HEAT-SENSITIVE COMPONENT - A thermal conduction path for a heat-sensitive, heat-generating component is formed by placing a heat-generating device, such as a laser diode, in a desired orientation relative to a supporting surface. A solid-phase mass of a heat-conducting material is positioned between the heat-generating device and the supporting surface and is converted to liquid phase by heating the supporting surface. Additional heat-conducting material is then added to the liquid-phase heat-conducting material until a meniscus is formed between the heat-generating component and the supporting surface. Because the heat-conducting material has a melting point or liquidus that is less than a critical temperature of the heat-generating component, the thermal conduction path can be formed without damaging the heat-generating component. | 02-21-2013 |
20130044776 | Integrated Advanced Heat Spreader for Solid-State Laser Systems - A thermal management apparatus and method for a solid-state laser system enabling the laser system to have near isothermal temperatures across and throughout a solid-state gain material, by mechanically controlling an oscillating heat pipe having effective thermal conductivity of 10-20,000 W/m*K; bonding a solid-state lasing crystal or ceramic to the mechanically controlled oscillating heat pipe; and providing a supporting structure including a surface bonded to the solid-state lasing crystal or ceramic that matches the coefficient of thermal expansion of both the solid-state lasing crystal or ceramic and the mechanically controlled oscillating heat pipe. | 02-21-2013 |
20130044777 | OPTICAL TRANSMITTER WITH STABLE OUTPUT WAVELENGTH - An optical transmitter is disclosed, where the optical transmitter shows an emission wavelength kept stable in one of grid wavelengths of the WDM system during the boot of the transmitter. The optical transmitter includes an LD, a TEC to control a temperature of the LD, and a controller. Detecting the flag to enable the optical output, the controller increases the driving current of the LD concurrently with the decrease of the temperature of the TEC to compensate the self-heating of the LD due to the driving current. | 02-21-2013 |
20130089114 | MOUNTING BASE FOR A LASER SYSTEM - A laser source assembly ( | 04-11-2013 |
20130142208 | OPTICAL AMPLIFIER AND LASER INCORPORATING SUCH AN AMPLIFIER - A high-gain optical amplifier for a wave to be amplified at a wavelength referred to as the emission wavelength, includes: optical pumping elements ( | 06-06-2013 |
20130148678 | QUANTUM CASCADE LASER SOURCE WITH ULTRABROADBAND SPECTRAL COVERAGE - A broadband quantum cascade laser includes multiple gain regions and a spacer layer disposed between at least two of the gain regions. The arrangement and characteristics of the gain regions and the spacer layer may be configured to reduce cross absorption between the gain regions. For example, one gain region may be configured to produce gain in an energy range in which another gain region produces absorptive effects. The thickness of the spacer layer may be selected to separate optical modes produced by adjacent gain regions while still producing a single broadband output from the quantum cascade laser. Gain competition between gain stages within a gain region may be mitigated by dividing gain stages with overlapping gain curves among multiple gain regions. | 06-13-2013 |
20130170514 | LASER MACHINE AND CONTROLLING METHOD OF LASER MACHINE - A laser machine includes a laser oscillator, a cooler for cooling the laser oscillator, and a control unit for controlling the laser oscillator and the cooler. The control unit includes a controller that stops base discharge of the laser oscillator at a time when a specified time has elapsed from a stop of laser light emission by the laser oscillator. According to the laser machine, since base discharge of the laser oscillator is stopped after the specified time has elapsed from the stop of laser light emission, wasteful energy (power) consumption of the laser oscillator in a standby state can be restricted. | 07-04-2013 |
20130208744 | EXCIMER LASER AND LASER DEVICE - An excimer laser may include a frame, a base plate on which the frame is disposed, an excimer laser configured to oscillate and output laser light by discharge-pumping within a chamber containing a laser gas, an optical element that is mounted upon the frame and that is disposed in the optical path of the outputted laser light and a heat removal mechanism connected to both the frame and the base plate. | 08-15-2013 |
20130208745 | HEAT-SWAP DEVICE AND METHOD - A TOSA can include: a light emitting element; and one or more heating elements thermally coupled to the light emitting element so as to provide a substantially constant heat generation profile and/or temperature profile across the TOSA during a light emitting element dormant period and a light emitting element firing period. The TOSA can include a controller operably coupled with the one or more heating elements so as to control the substantially constant heat generation profile and/or temperature profile. In one aspect, the one or more heating elements can include one or more dedicated heating elements. In one aspect, the one or more of the dedicated heating elements can include a resistor element or coil. | 08-15-2013 |
20130208746 | LASER SYSTEM WITH WAVELENGTH CONVERTER - The present invention relates to an apparatus comprising a diode laser ( | 08-15-2013 |
20130243017 | LASER CRYSTAL COMPONENTS JOINED WITH THERMAL MANAGEMENT DEVICES - A method for preparing a surface of a YAG crystal for thermal bonding includes performing an ion implantation process to introduce nitrogen into a surface layer of the YAG crystal to replace depleted oxygen therein, to change surface energy of the surface layer of the YAG crystal and to provide desired bonding characteristics for the surface layer; and joining the ion implanted surface layer with a thermal management device configured to dissipate heat from the YAG crystal. Also, a micro-chip device having a YAG crystal whose surface is prepared with the above disclosed method is provided and a device for forming a metallization pattern on a surface of the YAG crystal is provided. | 09-19-2013 |
20130250984 | LASER ELEMENT HAVING A THERMALLY CONDUCTIVE JACKET - A laser element includes a laser rod and a thermally conductive jacket on an exterior surface of the laser rod. The thermally conductive jacket assists in dissipating heat generated in the laser rod during the application of pump energy to the laser rod. | 09-26-2013 |
20130272329 | LASER DIODE DEVICES - A laser diode device including a housing having a mounting area in a cavity of the housing, at least one laser diode chip that emits electromagnetic radiation through a radiation exit area during operation, at least one covering element which is transmissive, at least in places, to the electromagnetic radiation generated by the laser diode chip during operation, and a deflection element, that directs at least part of the electromagnetic radiation generated by the laser diode chip during operation in a direction of the covering element, wherein the radiation exit area of the laser diode chip runs substantially transversely or substantially perpendicularly with respect to the mounting area and/or with respect to the covering element, the covering element connects to the housing, and the covering element tightly closes the housing. | 10-17-2013 |
20130287052 | METHODS FOR MANUFACTURING AND USING SOLID STATE LASER SYSTEMS HAVING CLADDED LASING MATERIALS - In one embodiment, the instant invention is an optical structure that includes: an optical active medium of a solid state laser, where the optical active medium has a first coefficient of thermal expansion; and a protective structure that is directly cladded a portion of the optical active medium, where the protective structure has a second coefficient of thermal expansion which matches the first coefficient of thermal expansion of the optical active medium, and where the protective structure is transparent to a wavelength that is within an absorption band of the optical active medium so that the optical structure has: the optical active medium that is protected from a physical damage, and the optical active medium that is capable of generating a laser beam having a first energy that is larger than a second energy generated by a control optical structure having the optical active medium without the protective structure. | 10-31-2013 |
20130308666 | SEMICONDUCTOR LASER - A semiconductor laser includes: a first reflector that is provided in a gain region and has a sampled grating in which a plurality of segments are combined; and a second reflector that is optically connected to the first reflector and has a sampled grating in which a plurality of segments are combined, the plurality of segments of the first reflector having a short-segment region and a long-segment region, the long-segment region having an optical length that is larger than that of the short-segment region and being positioned closer to the second reflector than at least one of the short-segment region, the optical length of the long-segment region being larger than that of the short-segment region in a range of integral multiple (n≧1) plus-minus 25% of the optical length of the short-segment. | 11-21-2013 |
20130336347 | LASER GAIN MODULE AND METHOD FOR PRODUCING SUCH A MODULE - According to one embodiment, the invention relates to a laser gain module ( | 12-19-2013 |
20140023100 | METAL VAPOR CIRCULATING SYSTEM - A system for circulating an alkali vapor to operate as, for example, a gain medium in a diode pumped alkali laser. The system includes a pump configured to pump a buffer gas to a metal source. A source heat exchanger heats the alkali metal source to produce a metal vapor that flows with the buffer gas. An action chamber receives the metal vapor and buffer gas combination and contains the combination while the metal vapor performs its required functions. The metal vapor and buffer combination continue to flow to a metal vapor trap and heat exchanger that cools the metal vapor and buffer gas combination. The metal vapor trap collects alkali metal condensate as the combination cools. The diffuser transport channel provides an inflow of clean buffer gas to the pump. The pump provides a circulating gas flow through the closed loop system. | 01-23-2014 |
20140023101 | SINGLE-CAVITY DUAL-ELECTRODE DISCHARGE CAVITY AND EXCIMER LASER - A single-cavity dual-electrode discharge cavity and an excimer laser including such a discharge cavity are disclosed. The discharge cavity may comprise a cavity body and two sets of main discharge electrodes. The cavity body may comprise a left chamber and a right chamber arranged to form a symmetric dual-chamber cavity. The left and right chambers can interface and communicate with each other at a plane of symmetry of the entire discharge cavity. The two sets of main discharge electrodes can be disposed in the left and right chambers on the upper side, respectively. According to the present disclosure, the single-cavity configuration can be used to achieve functions of dual-cavity configurations, such as MOPA, MOPO, and MOPRA. Thus, it is possible to reduce system complexities and also ensure synchronization of discharging in the discharge cavity. | 01-23-2014 |
20140036946 | DEVICE FOR MANAGING HEAT IN AN OPTICAL ELEMENT, AND RELATED HEAT-MANAGEMENT METHOD - A device is provided for managing heat in an optical element, including: the optical element; a material at a reference temperature; and an intermediate gas layer located directly between the reference-temperature material and the optical element, the intermediate gas layer being located on at least a portion of the thickness thereof in a temporary diffusion state defined by a thickness of the intermediate gas layer, such that the ratio of the mean free path of the gas molecules in the intermediate gas layer over said thickness is between 0.1 and 10. The thickness of the intermediate gas layer is between 10 μm and 5 mm. A corresponding heat-management method is implemented in the device for managing the temperature of an optical element. | 02-06-2014 |
20140056322 | Temperature Measurement And Control For Laser And Light-Emitting Diodes - The existing diodes in an LED or laser diode package are used to measure the junction temperature of the LED or laser diode. The light or laser emissions of a diode are switched off by removing the operational drive current applied to the diode package. A reference current, which can be lower the operational drive current, is applied to the diode package. The resulting forward voltage of the diode is measured using a voltage measurement circuit. Using the inherent current-voltage-temperature relationship of the diode, the actual junction temperature of the diode can be determined. The resulting forward voltage can be used in a feedback loop to provide temperature regulation of the diode package, with or without determining the actual junction temperature. The measured forward voltage of a photodiode or the emissions diode in a diode package can be used to determine the junction temperature of the emissions diode. | 02-27-2014 |
20140072004 | Wavelength-Stabilized Diode Laser - A hybrid external cavity laser (HECL) system comprises a diode laser, collection and collimation optics, and a volume Bragg grating, emits radiation at a single wavelength with a short-term wavelength stability in the order of at least one part in a billion The wavelength stability is achieved by use of a thermal management system, comprising inner and outer housings, each containing a temperature sensor, and electronic circuitry that monitors the temperatures and controls both the laser diode current and a thermoelectric cooler based on temperatures determined from said temperature sensors. The laser system is packaged in a compact enclosure that minimizes waste heat, facilitating use in applications that have heretofore employed stable, single-frequency lasers, including He—Ne lasers. | 03-13-2014 |
20140072005 | OPTICAL MODULE WITH ENHANCED ROBUSTNESS OF TEMPERATURE CONTROLLING DEVICE - An optical assembly (OSA) that installs a semiconductor optical device mounted on a thermo-electric controller (TEC) is disclosed. The TEC in the upper plate thereof is mechanically connected to the housing, or to the block stiffly fixed to the housing by a bridge made of stiff material. The bridge preferably extends along the optical axis to show enhanced durability against the impact caused by an external ferrule abutting against the receptacle of the OSA. | 03-13-2014 |
20140079083 | OPTICAL MODULE AND METHOD OF CONTROLLING OPTICAL MODULE - Provided is an optical module in which a temperature of a semiconductor element to be subjected to temperature control is controlled to fall within a desired operating temperature range regardless of whether an environmental temperature is outside or inside the operating temperature range of the semiconductor element, and which is stably operated with low power consumption. A control section | 03-20-2014 |
20140092928 | Gas Laser Having A Heat Exchanger - A gas laser includes a fan for producing a flow of a laser gas and a heat exchanger including multiple heat exchanger pipes. The heat exchanger further includes two end plates to which the multiple heat exchanger pipes are secured at the opposing ends thereof. The two end plates include openings for supplying a heat exchanger fluid to the multiple heat exchanger pipes. The multiple heat exchanger pipes extend substantially transversely relative to a flow direction of the flow of laser gas. | 04-03-2014 |
20140112361 | METHODS OF DRIVING LASER DIODES, OPTICAL WAVELENGTH SWEEPING APPARATUS, AND OPTICAL MEASUREMENT SYSTEMS - An optical wavelength sweeping apparatus having a laser diode with an active region, and a coupled pulse generator is disclosed. The pulse generator is configured and operable to provide current drive pulses of relatively short duration and high amplitude to the laser diode to selectively and rapidly heat the active region and the immediate vicinity and produce a rapid wavelength sweep of emitted optical radiation. Methods of driving a laser diode, and measurement systems are disclosed, as are other aspects. | 04-24-2014 |
20140112362 | GAS LASER DEVICE | 04-24-2014 |
20140146838 | Resonant Cavity Conditioning For Improved Nonlinear Crystal Performance - Systems and methods to improve the performance of nonlinear crystals in a resonant cavity are presented. A humidified purge gas is supplied to a resonant cavity of a laser based illumination source that includes a nonlinear crystal. A small amount of water vapor is added to a clean, dry purge gas to prevent excessive drying of the nonlinear crystal during storage or operation. In some embodiments, a humidity injection system includes at least two parallel flow paths. One flow path includes a humidity injector and another does not include humidity injection. The amount of water vapor added to the purge gas flow is determined at least in part by the relative flow rate between the parallel flow paths. In some embodiments, the amount of water vapor added to the purge gas flow is regulated based on a measurement of humidity in the resonant cavity. | 05-29-2014 |
20140204967 | Thermal Shunt - A thermal shunt is to transfer heat from a sidewall of a device to a silicon substrate. The device is associated with a Silicon-On-Insulator (SOI) including a buried oxide layer. The thermal shunt extends through the buried oxide layer to the silicon substrate. | 07-24-2014 |
20140247844 | WAVELENGTH TUNABLE SEMICONDUCTOR LASER HAVING TWO DIFRACTIVE GRATING AREAS - A semiconductor laser has a first diffractive grating area. The first diffractive grating area has a plurality of segments. Each segment has a first area including a diffractive grating and a second area that is space area combined to the first area. Optical lengths of at least two of the second areas are different from each other. A refractive-index of each of the segments are changeable. | 09-04-2014 |
20140247845 | Laser Device and Method for Generating Laser Light - The invention refers to a laser device comprising a plurality of linear resonator tubes ( | 09-04-2014 |
20140269795 | LASER ASSEMBLY AND METHOD FOR MANUFACTURING THE SAME - A laser assembly and a method for manufacturing the same are provided according to embodiments of the present disclosure. The laser assembly ( | 09-18-2014 |
20140269796 | MULTI-WAVELENGTH VCSEL ARRAY TO REDUCE SPECKLE - Embodiments of the invention describe an illuminator having a light source to originate an illumination beam, wherein the light source further comprises a set of vertical-cavity surface emitting lasers (VCSELs), including a first VCSEL having a first laser emission wavelength, and a second VCSEL having a second laser emission wavelength different than the first laser emission wavelength. Thus, by varying laser emission wavelengths of VCSELs in a VCSEL array, embodiments of the invention produce low-contrast speckle, and do not limit the imaging capabilities of the host illumination system. In some embodiments of the invention, vertical external cavity surface emitting lasers (VECSELs) are utilized to produce the above described varying laser emission wavelengths. | 09-18-2014 |
20140314110 | LASER SOURCE ASSEMBLY WITH THERMAL CONTROL AND MECHANICALLY STABLE MOUNTING - A laser source ( | 10-23-2014 |
20140314111 | THERMAL MANAGEMENT IN PACKAGED VCSELS - Heat management systems for vertical cavity surface emitting laser (VCSEL) chips are provided. Embodiments of the invention provide substrates having, a vertical cavity surface emitting laser chip disposed on the substrate surface and electrically interconnected with the substrate, a thermal frame disposed on the substrate surface and proximate to at least three sides of the vertical cavity surface emitting laser chip, and a thermal interface material disposed between the at least three sides of the vertical cavity surface emitting laser chip and the thermal frame. The substrate can also include a transceiver chip that is operably coupled to a further integrated circuit chip and that is capable of driving the VCSEL chip. | 10-23-2014 |
20140321488 | Tunable Laser With High Thermal Wavelength Tuning Efficiency - A monolithically integrated thermal tunable laser comprising a layered substrate comprising an upper surface and a lower surface, and a thermal tuning assembly comprising a heating element positioned on the upper surface, a waveguide layer positioned between the upper surface and the lower surface, and a thermal insulation layer positioned between the waveguide layer and the lower surface, wherein the thermal insulation layer is at least partially etched out of an Indium Phosphide (InP) sacrificial layer, and wherein the thermal insulation layer is positioned between Indium Gallium Arsenide (InGaAs) etch stop layers. | 10-30-2014 |
20140334507 | Mount for Semiconductor Devices Using Conformable Conductive Layers, and Method - A mount for semiconductor laser devices comprises thermally conductive anode and cathode blocks on either side of a semiconductor laser device such as a laser diode. Interposed between at least the anode block and the anode of the semiconductor laser device is a sheet of conformable electrically conductive material with high thermal conductivity such as pyrolytic highly-oriented graphite. In some embodiments, a second sheet of such electrically and thermally conductive conformable material is interposed between the cathode of the semiconductor laser device and the cathode block. The semiconductor laser device can be either a single laser diode or a diode bar having a plurality of emitters. A thermally conductive, but electrically insulating, spacer of essentially the same thickness as the laser diode or bar surrounds the diode or bar to prevent mechanical damage while still permitting the conformable material to be maintained in a compressed state and directing current through the laser device. | 11-13-2014 |
20140341240 | METHOD OF CONTROLLING TEMPERATURE OF SEMICONDUCTOR LASER, TEMPERATURE CONTROL DEVICE OF SEMICONDUCTOR LASER AND NON-TRANSITORY COMPUTER-READABLE MEDIUM - A method of controlling a temperature of a semiconductor laser includes: controlling a supply current so that a temperature of a temperature control element is changed to a target temperature, the temperature control element controlling a temperature of the semiconductor laser by a temperature changing according to the supply current supplied to the temperature control element; and performing a control for maintaining a calculated value calculated by a digital filter at a threshold when it is detected that the calculated value reaches the threshold, the calculated value being the supply current for achieving the target temperature, the threshold being equal to or less than an output limit of the digital filter. | 11-20-2014 |
20140341241 | PROJECTION RGB-LASER LIGHT SOURCE WITH STABILIZED COLOR BALANCE - A laser light source includes a thermoelectric cooling device, a composite green laser made up of an infrared wavelength pumped laser diode and a solid-state laser cavity designed for efficient nonlinear intra-cavity frequency conversion into desired wavelengths using periodically poled nonlinear crystals thermally coupled with the cooling device and a red wavelength laser diode thermally coupled with said cooling device. In this manner, the cooling device maintains a common temperature of the infrared pumped laser diode and the red laser diode over an ambient temperature range. | 11-20-2014 |
20140348191 | HYPERBOLIC METAMATERIALS AS DISTRIBUTED BRAGG MIRRORS FOR HIGH POWER VCSEL DEVICES - Implementing a layered hyperbolic metamaterial in a vertical cavity surface emitting laser (VCSEL) to improve thermal conductivity and thermal dissipation thereby stabilizing optical performance. Improvement in the thermal management and power is expected by replacing the distributed Bragg reflector (DBR) mirrors in the VCSEL. The layered metamaterial structure performs the dual function of the DBR and the heat spreader at the same time. | 11-27-2014 |
20140355633 | Gas Laser Having A Heat Exchanger - A gas laser includes a fan for producing a flow of a laser gas and a heat exchanger including multiple heat exchanger pipes. The heat exchanger further includes two end plates to which the multiple heat exchanger pipes are secured at the opposing ends thereof. The two end plates include openings for supplying a heat exchanger fluid to the multiple heat exchanger pipes. The multiple heat exchanger pipes extend substantially transversely relative to a flow direction of the flow of laser gas. | 12-04-2014 |
20140376579 | Method and system for managing thermally sensitive optical devices - Two or more lasers or other temperature sensitive optical devices can be disposed in an operating environment, for example in a common enclosure exposed to the environment. The environment can have a temperature that fluctuates, for example in connection with random events, weather, seasons, etc. Each laser's temperature can track the temperature of the environment in steps, with each laser following a distinct temperature track. The lasers can alternate outputting light into a wavelength division multiplexing channel. For example, during one timeframe, one laser can provide an optical communication signal having a wavelength complying with a wavelength division multiplexing criterion. During another timeframe, the other laser can provide an optical signal having substantially the same wavelength. Operating a laser at an elevated temperature can shorten laser lifetime. To mitigate temperature induced failure, a replacement laser can be engaged when a failure predictor, precursor, or indicator meets a threshold. | 12-25-2014 |
20140376580 | HIGH DENSITY LASER OPTICS - Apparatuses and methods for high density laser optics are provided. An example, of a laser optics apparatus includes a plurality of vertical cavity surface emitting lasers (VCSELs) in a monolithically integrated array, a high contrast grating (HCG) integrated with an aperture of a vertical cavity of each of the plurality of the VCSELs to enable emission of a single lasing wavelength of a plurality of lasing wavelengths, and a plurality of single mode waveguides, each integrated with a grating coupler, that are connected to each of the plurality of the integrated VCSELs and the HCGs, where each of the grating couplers is aligned to an integrated VCSEL and HCG. | 12-25-2014 |
20150063386 | SEMICONDUCTOR LASER STRUCTURE - A semiconductor laser structure is provided. The semiconductor laser comprises a central thermal shunt, a ring shaped silicon waveguide, a contiguous thermal shunt, an adhesive layer and a laser element. The central thermal shunt is located on a SOI substrate which has a buried oxide layer surrounding the central thermal shunt. The ring shaped silicon waveguide is located on the buried oxide layer and surrounds the central thermal shunt. The ring shaped silicon waveguide includes a P-N junction of a p-type material portion, an n-type material portion and a depletion region there between. The contiguous thermal shunt covers a portion of the buried oxide layer and surrounds the ring shaped silicon waveguide. The adhesive layer covers the ring shaped silicon waveguide and the buried oxide layer. The laser element covers the central thermal shunt, the adhesive layer and the contiguous thermal shunt. | 03-05-2015 |
20150078410 | VERTICAL CAVITY SURFACE EMITTING LASER DEVICE - A vertical cavity surface emitting laser (VCSEL) device includes a bottom distributed Bragg reflector (DBR); a top DBR; an optical cavity with an active layer stack formed between the bottom DBR and the top DBR, arranged for generating light with a predetermined emission wavelength; a top electrode layer with a first window formed above the top DBR; and a first heat dissipation layer sandwiched between the top DBR and the top electrode layer. The VCSEL device utilizes thicker, heavily doped semiconductor contact window for efficient heat dissipation from active region. Besides heat dissipation on the top side of VCSEL device, it also increases the bandwidth of VCSEL through top DBR reflectivity changes that reduce the photon lifetime via a surface relief structure etching on the top side of VCSEL device. Further, the invented VCSEL contains adjusted Aluminium molefractions in multiple sections of top and bottom DBRs to effectively dissipate heat from active region of VCSEL. Thus, proposed VCSEL device maintains lower junction temperature for achieving stable high-speed operations at high ambient temperature, thereby improving its performance. | 03-19-2015 |
20150098480 | OPTICAL ELEMENT MODULE - An optical element module includes a casing having a bottom plate, a temperature-adjusting unit being mounted on the bottom plate in the casing and having at least a lower layer portion and an upper layer portion positioned above the lower layer portion, a support member mounted on the temperature-adjusting unit in the casing, and a semiconductor laser element being mounted on the support member and outputting a laser light to a forward side. The upper layer portion of the temperature-adjusting unit projects at a backward side of the semiconductor laser element relative to the lower layer portion. | 04-09-2015 |
20150103853 | SEMICONDUCTOR LASER MODULE - A semiconductor laser module includes: a semiconductor laser element having at least one semiconductor laser; a first support member on which the semiconductor laser element is mounted; a first temperature-adjusting element adjusting a temperature of the first support member; a semiconductor optical element having a semiconductor optical amplifier amplifying a laser light outputted from the semiconductor laser element; and a second support member on which the semiconductor optical element is mounted. | 04-16-2015 |
20150103854 | WAVELENGTH-STABILIZED MICROCRYSTAL LASER - A microcrystal laser assembly including a gain-crystal includes a frame having a high thermal conductivity. The frame has a base with two spaced apart portions extending from the base. The gain-crystal has a resonator output mirror on one surface thereof. The gain-crystal is supported on the spaced-apart portions of the frame in the space therebetween. Another resonator minor is supported in that space, spaced apart from the output mirror, on a pedestal attached to the base of the frame. The pedestal and the frame have different CTE. Varying the frame temperature varies the spacing between the resonator mirrors depending on the CTE difference between the pedestal and the frame. | 04-16-2015 |
20150117482 | METHOD FOR CONTROLLING WAVELENGTH TUNABLE LASER - A method for controlling a wavelength tunable laser is disclosed, wherein a temperature of an optical waveguide is used in the wavelength tunable laser as a driving condition. The method comprises: acquiring a first driving condition from a memory, the wavelength tunable laser being operable to emit light of a first wavelength in the first driving condition; calculating a second driving condition using the first driving condition and a wavelength difference between the first wavelength and a second wavelength different from the first wavelength, the wavelength tunable laser being operable to emit light of the second wavelength in the second driving condition, the second driving condition being calculated under a condition that a temperature of the optical waveguide is always lower than a temperature of the optical waveguide represented by the first driving condition; and driving the wavelength tunable laser based on the second driving condition. | 04-30-2015 |
20150139259 | METHOD, SYSTEM AND APPARATUS FOR AUTOMATICALLY DETERMINING OPERATING CONDITIONS OF A PERIODICALLY POLED LITHIUM NIOBATE CRYSTAL IN A LASER SYSTEM - A method, system and apparatus for automatically determining operating conditions of a periodically poled lithium niobate crystal in a laser system are provided. The system comprise: a laser; a periodic poled lithium niobate (PPLN) crystal for receiving laser input from the laser; a temperature control device for adjusting the temperature of the PPLN crystal; a temperature sensor for monitoring the temperature of the PPLN crystal; and a computing device. While the PPLN crystal is receiving laser input, temperature of the PPLN crystal is changed using the temperature control device. The computing device monitors the temperature of the PPLN crystal and corresponding power of the temperature control device during the changing, the temperature monitored using the temperature sensor. The computing device determines one or more of operating conditions of the temperature control device and an operating temperature of the PPLN crystal from a function of the power vs. the temperature. | 05-21-2015 |
20150303652 | Temperature Controllable High Bit Rate Laser Diode - Provided is a temperature controllable high bit rate laser diode. The temperature controllable high bit rate laser diode includes: a stem including a plurality of electrodes protruding in a form of signal pins and arranged in two rows; a thermoelectric cooler provided on the stem and controlling a temperature of the temperature controllable high bit rate laser diode; and a sub mount positioned over the thermoelectric cooler and supporting a laser diode chip, a reflection mirror, and a monitor photodiode measuring output light intensity of the temperature controllable high bit rate laser diode. | 10-22-2015 |
20150311670 | HEAT-SWAP DEVICE AND METHOD - A TOSA can include: a light emitting element; and one or more heating elements thermally coupled to the light emitting element so as to provide a substantially constant heat generation profile and/or temperature profile across the TOSA during a light emitting element dormant period and a light emitting element firing period. The TOSA can include a controller operably coupled with the one or more heating elements so as to control the substantially constant heat generation profile and/or temperature profile. In one aspect, the one or more heating elements can include one or more dedicated heating elements. In one aspect, the one or more of the dedicated heating elements can include a resistor element or coil. | 10-29-2015 |
20150318656 | OPTICALLY PUMPED SOLID STATE LASER DEVICE WITH SELF ALIGNING PUMP OPTICS AND ENHANCED GAIN - The present invention relates to an optically pumped solid state laser device, comprising one or several solid state laser media ( | 11-05-2015 |
20150318665 | Thermal Shunt - A thermal shunt is to transfer heat from a sidewall of a device to a silicon substrate. The device is associated with a Silicon-On-Insulator (SOI) including a buried oxide layer. The thermal shunt extends through the buried oxide layer to the silicon substrate. | 11-05-2015 |
20160020578 | SEMICONDUCTOR LASER STRUCTURE - A semiconductor laser structure is provided. The semiconductor laser comprises a central thermal shunt, a ring shaped silicon waveguide, a contiguous thermal shunt, an adhesive layer and a laser element. The central thermal shunt is located on a SOI substrate which has a buried oxide layer surrounding the central thermal shunt. The ring shaped silicon waveguide is located on the buried oxide layer and surrounds the central thermal shunt. The ring shaped silicon waveguide includes a P-N junction of a p-type material portion, an n-type material portion and a depletion region there between. The contiguous thermal shunt covers a portion of the buried oxide layer and surrounds the ring shaped silicon waveguide. The adhesive layer covers the ring shaped silicon waveguide and the buried oxide layer. The laser element covers the central thermal shunt, the adhesive layer and the contiguous thermal shunt. | 01-21-2016 |
20160028210 | 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, a thermally stable enclosure, and a temperature controller. The thermally stable enclosure is substantially made of a material with high thermal conductivity such as at least 5 W/(m K). The thermally stable enclosure can help maintain alignment of the laser beams to a target object over a range of ambient temperatures. Various embodiments of an optical system for directing light for optical measurements such laser-induced fluorescence and spectroscopic analysis are disclosed. In some embodiments, the optical system includes a thermally conductive housing and a thermoelectric controller, a plurality of optical fibers, and one or more optical elements to direct light emitted by the optical fibers to illuminate a flow cell. The housing is configured to attach to a flow cell. | 01-28-2016 |
20160056602 | LASER OSCILLATOR PROVIDED WITH LASER MEDIUM FLOW PATH - A laser oscillator which can keep distributions of pressure of a laser medium inside of a plurality of discharge tubes constant while making the laser medium circulate without stagnating. The laser oscillator is comprised of a first discharge tube, second discharge tube, first light guide, laser medium flow path, and blower. A flow resistance of a laser medium flow path between the blower and the first discharge tube and a flow resistance of the laser medium flow path between the blower and second discharge tube are the same as each other. A flow resistance of the laser medium flow path between the blower and a first end of the first light guide and a flow resistance of the laser medium flow path between the blower and a second end of the first light guide differ from each other. | 02-25-2016 |
20160087401 | HEAT ASSISTED MEDIA RECORDING DEVICE WITH REDUCED LIKELIHOOD OF LASER MODE HOPPING - An apparatus includes a laser diode, a heater arrangement, and a circuit. The laser diode is configured to facilitate heat assisted magnetic recording during a lasing state. The heater arrangement is positioned proximate the laser diode. The circuit electrically couples the laser diode and the heater arrangement in a parallel relationship. The circuit is configured to alternately operate the laser diode in a lasing state and a non-lasing state, and to activate the heater arrangement during the non-lasing state to warm a junction of the laser diode. | 03-24-2016 |
20160087402 | THERMAL MANAGEMENT OF LASER DIODE MODE HOPPING FOR HEAT ASSISTED MEDIA RECORDING - A method and apparatus provide for determining a temperature at a junction of a laser diode when the laser diode is operated in a lasing state that facilitates heat-assisted magnetic recording, comparing the junction temperature and an injection current supplied during the lasing state to stored combinations of junction temperature and injection current, and determining a likelihood of mode hopping occurring for the laser diode during the lasing state based on the comparison to stored combinations of junction temperature and injection current. | 03-24-2016 |
20160087403 | Laser Oscillation Device - A laser oscillation device comprises a light emitting unit for projecting a pump laser beam, a laser medium for absorbing the pump laser beam and for emitting a spontaneous emission light, a saturable absorber for absorbing the spontaneous emission light and for emitting a pulsed light, and a holder for holding the laser medium in a close contact state, wherein a portion of the holder as appressed against at least one surface of the laser medium is made of a metal and the pump laser beam is projected to an edge portion of the laser medium as appressed against the holder. | 03-24-2016 |
20160111853 | LASER SOURCE ASSEMBLY WITH THERMAL CONTROL AND MECHANICALLY STABLE MOUNTING - A laser source ( | 04-21-2016 |
20160111856 | Thermal Compensation for Burst-Mode Laser Wavelength Drift - An apparatus comprising a burst-mode laser comprising an active layer and configured to emit an optical signal during a burst period, wherein a temperature change of the burst-mode laser causes the optical signal to shift in wavelength, and a heater thermally coupled to the active layer and configured to reduce a wavelength shift of the optical signal during the burst period by applying heat to the active layer based on timing of the burst period. | 04-21-2016 |
20160118764 | THICK DISC LASER AMPLIFICATION SYSTEM AND USES THEREOF - The invention concerns a laser amplification system comprising a pumping device and at least one thick amplifier disc having a first face, which is reflective at the wavelengths of a pulsed laser beam of the laser amplification system and of a pump beam of the pumping device, as well as at least one heat-dissipation component to which this first face of the amplifier disc is firmly secured, the saturation fluence of the active medium of the amplifier disc being equal to or less than 3 J·cm | 04-28-2016 |
20160118769 | OPTICAL RESONATOR - An optical resonator includes a casing and various optical elements (laser crystal, SHG, etalon, movable mirror) provided within the casing. The optical resonator causes light from the excited laser crystal to resonate and, using the etalon, emits single longitudinal mode laser light. The casing is formed with a low thermal expansion metal exhibiting a thermal expansion coefficient within a range of 0.1 to 3.0×10 | 04-28-2016 |
20160118770 | MOUNTING LAYER FOR COOLING STRUCTURE - The invention describes a mounting layer ( | 04-28-2016 |
20160126698 | LIGHT SOURCE DEVICE AND HEAT PROCESSING DEVICE FOR LIGHT SOURCE - 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. | 05-05-2016 |
20160141825 | AIR COOLED LASER SYSTEMS USING OSCILLATING HEAT PIPES - Provided are air cooled laser systems, such as portable air cooled laser systems, and methods of operating thereof. An air cooled laser system includes an oscillating heat pipe having one end thermally coupled to one or more laser diodes and the other end being air cooled. The oscillating heat pipe has an extremely high thermal conductivity (e.g., much higher than that of copper) which allows using ambient air for cooling. This air cooling aspect reduces the size, weight, and complexity of the system. Furthermore, the air cooling aspect reduces power consumption since no power is used for liquid circulation. To enhance air-cooling characteristics, the end of the oscillating heat pipe away from the diodes may be thermally coupled to one or more heat dissipating fins. Furthermore, the system may be equipped with a blower for controlling the flow of air around that end. | 05-19-2016 |
20160141830 | TO-TYPE OPTICAL ELEMENT PACKAGE FOR HIGH-SPEED COMMUNICATION - A TO-type optical element package for high-speed communication which is used for an optical module for high-speed communication of at least 10 gigabits per sec (Gbps) and enables thermoelectric elements to be embedded in an upper part of a stem. The TO-type optical element package for high-speed communication can transmit high-quality signals in a high-speed operation of the optical element by inserting and fixing an electrode pin ( | 05-19-2016 |
20160141832 | LASER APPARATUS AND OPTICAL TRANSMITTER - A laser apparatus includes a semiconductor laser of which a drive condition is controlled according to a plurality of types of drive currents and a controller which controls the drive condition such that a sum of the drive currents is equal to or less than a predetermined threshold value. | 05-19-2016 |
20160254642 | AIR-COOLED LASER DEVICE HAVING L-SHAPED HEAT-TRANSFER MEMBER WITH RADIATING FINS | 09-01-2016 |
20160254643 | AIR-COOLED LASER DEVICE HAVING HEAT-TRANSFER MEMBER WITH HEAT RADIATING FINS | 09-01-2016 |