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Frequency multiplying (e.g., harmonic generator)

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372 - Coherent light generators

372009000 - PARTICULAR BEAM CONTROL DEVICE

372021000 - Nonlinear device

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DocumentTitleDate
20130044773OPTICAL SOURCES HAVING PROXIMITY COUPLED LASER SOURCE AND WAVEGUIDE - An optical source including a laser source and a waveguide is provided. The laser source includes a laser cavity having a laser optical path length extending from a DBR grating to a reflective laser output facet, and emits an output beam at a fundamental wavelength. The waveguide has an input facet and an output facet, and extends along a waveguide optical length from the input facet of the waveguide to the output facet of the waveguide. The input facet and the output facet of the waveguide are approximately normal with respect to an optical path of the output beam. The waveguide and the laser source are proximity coupled, and the waveguide optical length is an integer multiple of the laser optical path length.02-21-2013
20090213881Vertically Emitting, Optically Pumped Semiconductor Comprising an External Resonator and Frequency Doubling on a Separate Substrate - An optically pumped semiconductor apparatus having a surface-emitting semiconductor body (08-27-2009
20100135345WAVELENGTH CONVERSION LASER DEVICE AND NONLINEAR OPTICAL CRYSTAL USED IN THE SAME - A wavelength conversion laser device and a nonlinear optical crystal used in the same. The wavelength conversion laser device includes a laser light source for emitting a predetermined wavelength beam, and a laser medium for exciting the predetermined wavelength beam from the laser light source into a fundamental beam. The wavelength conversion laser device further includes a nonlinear optical crystal composed of a KTiOPO06-03-2010
20100040094Optical systems for laser arrays - Surface emitting laser arrays with intra-cavity harmonic generation are coupled to an optical system that extracts harmonic light in both directions from an intra-cavity nonlinear optical material in such a way that the focusing properties of the light beams are matched.02-18-2010
20100040093LASER BEAM SOURCE DEVICE, LIGHTING DEVICE, IMAGE DISPLAY APPARATUS, AND MONITORING APPARATUS - A laser beam source device includes: a light source which emits light having fundamental wavelength; a wavelength conversion element which converts the light having fundamental wavelength into light having conversion wavelength; a resonance element which transmits first light converted into the conversion wavelength light and reflects light not converted; an optical path conversion element which releases second light contained in the light reflected by the resonance element and converted into the conversion wavelength light in the same direction as the direction of the first light, and releases the light not converted toward the light source; and a supporting member. The resonance element is disposed in such a position that one end surface of the resonance element on the second light side is shifted to the supporting member from one end surface of the wavelength conversion element on the second light side.02-18-2010
20090080475WAVELENGTH CONVERSION OPTICAL ELEMENT, METHOD FOR FABRICATING WAVELENGTH CONVERSION OPTICAL ELEMENT, WAVELENGTH CONVERSION DEVICE, ULTRAVIOLET LASER IRRADIATOR AND LASER MATERIAL PROCESSING SYSTEM - An optical wavelength conversion element includes a cesium-lithium-borate crystal processed into a 10-mm long optical element cut in an orientation that allows a fourth harmonic of a Nd:YAG laser to be generated. A transmittance (Ta) at 3589 cm03-26-2009
20100142570PULSED LASER LIGHT SOURCE BASED ON FREQUENCY CONVERSION - A light emitting device including a waveguide having an electrically pumped gain region, a saturable absorber, a nonlinear crystal, an inclined mirror, and a light-concentrating structure. Light pulses emitted from the gain region are reflected by the inclined minor and focused by the light-concentrating structure into the nonlinear crystal in order to generate frequency-converted light pulses. The gain region, the saturable absorber, the light-concentrating structure and the inclined minor are implemented on or in a common substrate. The resulting structure is stable and compact, and allows on-wafer testing of produced emitters. The folded structure allows easy alignment of the nonlinear crystal.06-10-2010
20120219027UV Laser System - In a UV laser system, the problem of deposition of residues of organic substances on the surfaces of optical components is avoided so that the reduction in the laser output can be avoided. A wavelength converting crystal (08-30-2012
20090041068Single-frequency monolithic linear laser device and system comprising same - A laser device includes: an amplifying medium (02-12-2009
20110013653INTRA-CAVITY GENERATION OF PULSED COHERENT RADIATION IN THE UV OR XUV WAVELENGTH RANGE - A radiation source that provides high order harmonic radiation (HHG radiation) in an UV or XUV wavelength range comprising a resonant cavity that guides laser light pulses that includes at least two cavity mirrors, a first non-linear medium that provides the HHG radiation by harmonic generation based on an interaction of the laser light pulses with the first non-linear medium, wherein the first non-linear medium is arranged in the resonant cavity in an environment of reduced pressure, and a second non-linear medium arranged in the resonant cavity and adapted for at least one of amplifying the laser light pulses and phase locking longitudinal modes of the laser light pulses in the resonant cavity.01-20-2011
20090268763Frequency Stabilized Laser Source - A laser arrangement is provided, in which a Lyot filter arrangement is operative to effect single mode operation. The birefringent element of the Lyot filter arrangement has a cavity folding mirror on one side thereof and a polarizing element on another side thereof, such that the free spectral range of the Lyot filter is improved. Preferably, the Lyot filter arrangement and the laser gain material are located in different branches of the folded cavity.10-29-2009
20120224595SINGLE-MODE INTRA-CAVITY FREQUENCY-DOUBLED CW SOLID-STATE LASER WITH VOLUMETRIC GAIN-GRATING - A solid state-gain medium is in the form of a thin disk backed by a reflective coating. A laser resonator is formed by the reflective coating and another mirror. Optical pump radiation is directed into the thin-disk gain-medium for energizing the gain-medium and generating a standing wave of fundamental-wavelength radiation in the resonator. The pump-radiation is directed into the gain-medium at an angle to the resonator axis and pump-radiation fringes are formed by interference between incident and reflected pump-radiation. The pump-radiation angle is selected such that the pump-radiation fringes are aligned with antinodes of the fundamental-wavelength standing wave.09-06-2012
20090238222LASER SYSTEM EMPLOYING HARMONIC GENERATION - A laser system provides harmonic generation in a laser beam pulse. In another aspect of the present invention, a laser operably remits a laser pulse, a gaseous optical medium operably creates third or greater harmonic generation in the pulse, and a controller characterizes and compensates for distortions in the pulse. A further aspect of the present invention employs multiple optical media arranged to cause cascading harmonic generations in a laser pulse.09-24-2009
20090238221Laser equipment - Laser equipment for outputting output lights having different wavelengths includes: a substrate; an excitation light generation element for emitting excitation lights including surface emitting laser elements and disposed on the substrate; and a light converter having a pair of second reflection layers and a solid laser medium layer, both of which provide a resonator. The solid laser medium layer is capable of generating lights having different peak wavelengths by receiving the excitation lights. The light converter is disposed on an output surface of the excitation light generation element.09-24-2009
20090238220REDUCTION OF SURFACE HEATING EFFECTS IN NONLINEAR CRYSTALS FOR HIGH POWER FREQUENCY CONVERSION OF LASER LIGHT - A device for generating a high power frequency converted laser beam includes a nonlinear optical crystal having an entrance surface and a curved surface. The nonlinear optical crystal is configured to receive at least one laser beam at the entrance surface and provide a frequency converted beam through a frequency conversion process. The device also includes an optical coating coupled to the curved surface. The reflectance of the optical coating is greater than 50% at a wavelength of the frequency converted beam. Additionally, the far field divergence angle of the frequency converted beam increases after reflection off the curved surface. The device further includes a heat sink in thermal contact with the optical coating.09-24-2009
20090232170Semiconductor Laser Module - A semiconductor laser module is disclosed, comprising a module carrier (09-17-2009
20090232169WAVELENGTH CONVERTING LASER DEVICE - A wavelength converting laser device includes a laser diode producing laser light and including an optical resonator having a pair of facing reflectors, including a reflecting surface having a shape reducing loss in the optical resonator, with regard to a specific horizontal transverse mode of laser light as compared to the loss in the optical resonator for other horizontal transverse modes, and a wavelength converter for converting the laser light into harmonic light.09-17-2009
20120113996LINE-PROJECTION APPARATUS FOR ARRAYS OF DIODE-LASER BAR STACKS - In optical apparatus for illuminating a mask-plane with a line of light, a light source includes four fast-axis stacks of laser diode bars with fast and slow axis collimating arrangements providing four collimated beams of diode-laser light. A combination of a lens element and two diffraction gratings collects the four collimated beams and spreads the beams in the fast-axis direction such that the spread beams overlap in the mask plane to form a line of light having a length in the fast-axis-direction and a width in the slow-axis direction of the diode-laser bar stacks.05-10-2012
20110122899SEMICONDUCTOR LASER - A semiconductor laser includes a semiconductor laser element that emits electromagnetic radiation with at least one fundamental wavelength when in operation, an end mirror, a deflecting mirror reflective as a function of polarization located between the semiconductor laser element and the end mirror, and at least one optically nonlinear crystal configured for type II frequency conversion of the fundamental wavelength and which satisfies a λ/2 condition for the fundamental wavelength.05-26-2011
20100150187LASER - A laser apparatus in which the elimination of separate optical components to provide intra-cavity polarization and compensation for thermally induced birefringence, and their associated losses, results in an improvement in efficiency and reduction in complexity over prior art designs.06-17-2010
20110286477Multiple Wavelength Optical Systems - Optical systems operable to emit multiple frequency-converted spectral peaks are provided. In one embodiment, an optical system includes an optical source and a wavelength conversion device. The optical source may include a laser configured to emit a pump beam having at least two fundamental spectral peaks. The wavelength conversion device may include a non-linear optical medium configured to phase match the second harmonic generation of each of the at least two fundamental spectral peaks and sum-frequency generation of the at least two fundamental spectral peaks such that an output beam comprising at least three frequency-converted spectral peaks having approximately equal power is emitted from an output facet of the wavelength conversion device when the pump beam of the optical source is incident on an input facet of the wavelength conversion device.11-24-2011
20090219957Radio-Frequency-Modulated Surface-Emitting Semiconductor Laser - In a surface emitting semiconductor laser comprising a semiconductor chip (09-03-2009
20090154510Optoelectrical assembly with frequency-doubled solid state laser - An optoelectrical assembly (06-18-2009
20100238958FIBER-BASED WAVELENGTH AGILE VISIBLE LASER SOURCE - A system is provided for providing high power, wavelength tunable, laser radiation, the system comprising: a plurality of seeder sources, each the source of the plurality having a different seeder wavelength; a Ytterbium doped amplifier chain, receiving radiation from the plurality of seeder sources and at least one pump source; a second harmonic generator communicating with the Ytterbium doped amplifier chain, the second harmonic generator comprising converting radiation of the seeder wavelength into radiation of a second harmonic wavelength; and wherein the second harmonic generator comprises a crystal having a plurality of grating segments, wherein each grating segment converts radiation of a different wavelength.09-23-2010
20100080252OPO MID-IR WAVELENGTH CONVERTER - A wavelength converter comprising an arsenic sulfide (As—S) chalcogenide glass fiber coupled to an optical parametric oscillator (OPO) crystal and a laser system using an OPO crystal coupled to an As—S fiber are provided. The OPO receives pump laser radiation from a pump laser and emits laser radiation at a wavelength that is longer than the pump laser radiation. The laser radiation that is emitted from the OPO is input into the As—S fiber, which in turn converts the input wavelength from the OPO to a desired wavelength, for example, a wavelength beyond about 4.4 μm. In an exemplary embodiment, the OPO comprises a periodically poled lithium niobate (PPLN) crystal. The As—S fiber can include any suitable type of optical fiber, such as a conventional core clad fiber, a photonic crystal fiber, or a microstructured fiber.04-01-2010
20120106580Optical systems for laser arrays - Surface emitting laser arrays with intra-cavity harmonic generation are coupled to an optical system that extracts harmonic light in both directions from an intra-cavity nonlinear optical material in such a way that the focusing properties of the light beams are matched.05-03-2012
20090262763LARGE-SIZED BISMUTH-ZINC-BORATE NONLINEAR OPTICAL CRYSTAL AND PREPARATION METHODS AND APPLICATIONS THEREOF - The present invention relates to a large-sized and high-quality bismuth-zinc-borate (Bi.sub.2 ZnB.sub.2 O.sub.7) single crystal, preparation methods and applications thereof. The crystal has cross-sectional dimensions greater than one centimeter, a nonlinear optical effect of about 3-4 times that of KH.sub.2 PO.sub.4 (KDP), and an optical transmission wavelength range of 330-3300 nm. The crystal can be grown from a compound melt by a Czochralski method, a Kyropoulos method or a Bridgman method with the raw material being the synthetic compound Bi.sub.2 ZnB.sub.2 O.sub.7. Alternatively, the crystal may be grown from a high-temperature solution method by using Bi.sub.2 O.sub.3 as a flux. The crystal may be applied in nonlinear optical devices such as frequency doubling generators, frequency upconverters or downconverters, and optical parametric oscillators.10-22-2009
20090274178Optical Package Having Deformable Mirrors For Focus Compensation - An optical package includes a semiconductor laser, an adjustable mirror and a wavelength conversion device comprising a waveguide portion. The semiconductor laser, adjustable mirror, and wavelength conversion device are oriented to form an optical pathway between an output of the semiconductor laser and an input of the wavelength conversion device. The beam of the semiconductor laser is directed along the optical pathway and onto the adjustable mirror where the beam is reflected by the adjustable mirror onto the waveguide portion of the wavelength conversion device. The adjustable mirror may also be either thermally or mechanically deformable such that, when the adjustable mirror is deformed, the path of the beam along the optical pathway is altered thereby focusing the beam on the waveguide portion of the wavelength conversion device. The adjustable mirror may be adjusted such that the beam of the semiconductor laser is positioned on the waveguide portion of the wavelength conversion device.11-05-2009
20090279575CARRIER SUBSTRATE FOR MICRO DEVICE PACKAGING - A carrier substrate (11-12-2009
20090285250Rotary Disk Laser and Amplifier Configurations - There is provided a rotary disk laser module including disk comprised of at least one lasing material. The lasing material may be excited by a laser excitation source, such as an optical pump beam directed onto the disk. The laser gain region contains excited lasing material and extends between the first and second surfaces of the disk. A laser generator is formed when the gain region is brought into optical communication with a laser generator. A laser generator may be a laser oscillator or a laser amplifier. The disk may move in order to enable various lasing functionality to the laser module. For instance, the disk may rotate, translate, or tilt to rotate the gain region, provide various quantum effects, or to enable heat transfer with a heat sink. A high-power laser generator may be formed by using a number of disks containing lasing material, exciting the lasing material using at least one laser excitation source, and bringing them into optical communication with a laser generator.11-19-2009
20090103576System and Method of Providing Second Harmonic Generation (SHG) Light in a Single Pass - A system and method of providing second harmonic generation (SHG) light in a single pass. A frequency stabilized semiconductor seed laser provides a first frequency light to a fiber amplifier. A focusing optic configuration receives the amplified first frequency light and focuses the amplified first frequency light into a non-linear material. A harmonic separator separates the first frequency light from the second frequency light and an optical output structure outputs the second frequency light.04-23-2009
20090296755Laser system - A method and apparatus may comprise a laser light source system which may comprise a solid state laser seed beam source providing a seed laser output; a frequency conversion stage converting the seed laser output to a wavelength suitable for seeding an excimer or molecular fluorine gas discharge laser; an excimer or molecular fluorine gas discharge laser gain medium amplifying the converted seed laser output to produce a gas discharge laser output at approximately the converted wavelength. The excimer or molecular fluorine laser may be selected from a group comprising XeCl, XeF, KrF, ArF and F12-03-2009
20090296756Laser Frequency Multiplier with Temperature Control - Disclosed is a laser apparatus. The apparatus includes a frequency multiplier to multiply a first frequency of laser radiation to a second frequency, the frequency multiplier having a temperature that can vary over a temperature range, and a controller to control the temperature of the frequency multiplier to regulate the level of laser radiation exiting the frequency multiplier.12-03-2009
20090041067Engineered nonlinear optical crystal composites for frequency conversion - Walk-off corrected (WOC) non-linear optical (NLO) components, devices and systems including one or more engineered WOC NLO crystal doublets. Such systems and devices advantageously increase the efficiency of an OPO operation. Devices are applicable to any uniaxial and biaxial NLO crystals in a wide range of wavelengths, e.g., from far ultraviolet to visible to far infrared. Devices employing engineered WOC NLO components according to embodiments of the present invention include any conventional frequency converting architectures. Systems and methods are also provided to unambiguously determine and correct walk-off for any arbitrary uniaxial and biaxial crystal orientation. The correct crystal orientation is also experimentally confirmed. This allows the use of WOC crystal doublet assemblies for a wide range of wavelengths and NLO crystals that until now have not been used because of low efficiency due to walk-off and inability of readily correcting walk-off.02-12-2009
20100103966WAVELENGTH CONVERSION LASER, IMAGE DISPLAY DEVICE AND LASER PROCESSING DEVICE - A wavelength conversion laser is provided with a pair of fundamental wave reflecting surfaces for reflecting a fundamental wave to define a plurality of fundamental wave paths passing a wavelength conversion element at different angles, and a control unit for controlling wavelength conversion efficiencies so that the wavelength conversion efficiency on a specific one of the plurality of fundamental wave paths extending in different directions between the pair of fundamental wave reflecting surfaces is highest.04-29-2010
20090003393SOLID-STATE LASER DEVICE WITH A CRYSTAL ARRAY - In a laser device, a crystal array includes a laser gain crystal and an optically non-linear frequency conversion crystal. A pump source couples at least two mutually spatially separated pump beams into the crystal array. Between two pump beams, a saw kerf of the crystal array extends parallel to the pump beams.01-01-2009
20080310466Apparatus and Method of Generating Laser Beam - A laser beam generating apparatus includes a semiconductor element and a second harmonic generating element that performs a wavelength conversion on fundamental light emitted from the semiconductor element, the laser beam generating apparatus is an external resonance-type laser diode that has an external resonator structure and emits a transversal single mode laser beam, and the second harmonic generating element is a waveguide-type second harmonic generating element that includes a single mode waveguide.12-18-2008
20080310464Device for Generating and Modulating a High-Frequency Signal - A device and method involving a plurality of lasers for generating and modulating a tunable, high-frequency signal for a wireless communication system, including an optical waveguide, may be produced using standard components of optical communication technology. A signal source may be provided which generates an optical signal and is disposed on one side of the optical waveguide. At least one means is provided for generating harmonic waves of this signal, which propagate as frequency mix in the optical waveguide. Two pump lasers are provided for the injection of pump waves on an opposite side of the optical waveguide, which are adapted so that together they amplify two harmonic waves of the frequency mix by stimulated Brillouin scattering. The rest of the harmonic waves are attenuated by damping in the optical waveguide. The two amplified harmonic waves are superposed in a photo element in heterodyne fashion and generate the RF signal.12-18-2008
20080310465Method and Laser Device for Stabilized Frequency Doubling - A system and method for emitting a plurality of second harmonic light frequencies that is generally unaffected by small variations in external cavity length and temperature. An illustrative embodiment provides a laser system that comprises a semiconductor gain region operating within the coherence collapse regime, an intra-cavity nonlinear optical medium, and a feedback reflector. The semiconductor gain region operates in the coherence collapse regime and produces broad frequency fundamental light, the nonlinear resonator doubles a first portion of the broad frequency fundamental light and emits a plurality of second harmonic light frequencies external to the laser system. A second portion of the broad frequency fundamental light is reflected into the semiconductor gain region with a feedback power ratio sufficient to cause the semiconductor gain region to operate in the coherence collapse regime.12-18-2008
20080240177Continuous-wave ultraviolet laser - A laser is disclosed, which is suitable for efficient generation of continuous-wave laser light having a wavelength of about 400 nm or less. The short-wavelength light is generated by first frequency-doubling a fundamental wave, and then sum-frequency mixing the frequency-doubled wave and the fundamental wave. The non-linear interactions are effected by means of quasi-phasematching structures inside a resonant cavity where the fundamental wave is circulating. The sum-frequency mixing is effected using second or higher order quasi-phasematching, which allows for wider domains to be inverted for the quasi-phasematching structure compared to first order quasi-phasematching. Preferably, the sum-frequency mixing is effected using periodically poled stoichiometric lithium tantalate (PPSLT) for second or third order quasi-phasematching.10-02-2008
20090074016Apparatus for Terahertz wave generation from water vapor - Apparatus for Terahertz wave generation. An amplified laser generates a pulsed optical fundamental beam and a crystal passes the fundamental beam to generate a second harmonic beam of the fundamental beam. A lens focuses the mixed fundamental and second harmonic beams and a gas cell containing water vapor receives the focused beams and generates Terahertz waves.03-19-2009
20090161704INTRACAVITY UPCONVERSION LASER - The present invention relates to an upconversion laser system comprising at least a semiconductor laser having a gain structure (06-25-2009
20090161703SUM-FREQUENCY-MIXING Pr:YLF LASER APPARATUS WITH DEEP-UV OUTPUT - A method for generating ultraviolet radiation includes sum-frequency mixing in one optically nonlinear crystal fundamental-wavelength radiation generated by a Pr:YLF gain-element with radiation having a second-harmonic wavelength of fundamental-wavelength radiation generated by a Pr:YLF gain-element. The second-harmonic wavelength is generated in another optically nonlinear crystal. The fundamental-wavelength radiation being mixed and the fundamental wavelength radiation from which the second-harmonic radiation is generated may have the same wavelength or different wavelengths.06-25-2009
20090185587LASER GENERATOR AND METHOD OF CONTROLLING THE SAME - A laser generator includes a generation means for pumping by a pumping light source (07-23-2009
20090141749LASER MODULE - A laser module including a light emitter, a filter, a nonlinear optical crystal, a first temperature adjuster, and a second temperature adjuster is provided. The light emitter emits a first beam. The filter is disposed on a transmission path of the first beam and reflects the first beam. The nonlinear optical crystal is disposed on the transmission path of the first beam and between the light emitter and the filter. The nonlinear optical crystal converts a part of the first beam into a second beam. A frequency of the second beam is larger than a frequency of the first beam. The second beam passes through the filter. The first temperature adjuster is connected with the filter for adjusting a temperature of the filter. The second temperature adjuster is connected with the nonlinear optical crystal for adjusting a temperature of the nonlinear optical crystal.06-04-2009
20110222565DEVICE FOR EXTENDING THE SERVICE LIFE OF A NON-LINEAR OPTICAL SYSTEM SUBJECTED TO THE RADIATION OF AN INTENSE LASER BEAM AND NON-LINEAR OPTICAL SOURCE INCLUDING SAID DEVICE - A device for extending the lifetime of a frequency-converting non-linear optical system (09-15-2011
20090219958WAVELENGTH CONVERTING LASER AND IMAGE DISPLAY - A wavelength converting laser includes: a fundamental-wave laser light source emitting a fundamental wave; and a wavelength conversion element converting the fundamental wave emitted from the fundamental-wave laser light source into a converted wave having a different wavelength from the fundamental wave, in which: a pair of fundamental-wave reflecting surfaces is arranged on both end sides of the wavelength conversion element in the directions of an optical axis thereof and reflects the fundamental wave to thereby pass the fundamental wave a plurality of times inside of the wavelength conversion element, and at least one of the fundamental-wave reflecting surfaces transmits the converted wave; and the pair of fundamental-wave reflecting surfaces allows the fundamental wave to cross inside of the wavelength conversion element and form a plurality of light-concentration points at places different from a cross point of the fundamental wave. The wavelength converting laser is capable of obtaining a high conversion efficiency stably and being miniaturized.09-03-2009
20090252185Laser light source device, illumination device, image display device, and monitor device - A laser light source device includes: a light source; an external resonator; a wavelength conversion element converting the wavelength of part of incident light having the first wavelength into the second wavelength which is different from the first wavelength; and an optical-path conversion element causing the light that has been converted into light of the second wavelength in the process of traveling to the light source due to reflection from the external resonator to be separated into a second optical-path different from the first optical-path, and emitting a second laser light of the second wavelength. In the laser light source device, and the height of the wavelength conversion element is greater than a distance between an optical-axis of the first laser light on an end face of the wavelength conversion element which is close to the external resonator and an optical-axis of the second laser light.10-08-2009
20090252184LASER OSCILLATOR AND LASER PROCESSING APPARATUS - A laser oscillator of a laser processing apparatus includes a pair of terminating mirrors, between which a straight light path lies, and also includes a ¼ wavelength plate, an active medium, a higher harmonic wave separating/outputting mirror, a condensing lens, and a nonlinear optical crystal (wavelength converting crystal) that are lined up at given intervals on the light path between the terminating mirrors. The focus of the optical lens is determined to be near a reflection surface of the first terminating mirror, so that the optical lens is disposed to be separated from the reflection surface of the first terminating mirror by a distant approximately equal to a focal distance across the nonlinear optical crystal on the light path of an optical resonator.10-08-2009
20090257463LASER LIGHT SOURCE, IMAGE DISPLAY APPARATUS, AND PROCESSING APPARATUS - A laser light source includes a fundamental laser generator that generates a fundamental laser light, a wavelength conversion element that is made of a ferroelectric crystal with a periodically poled structure and converts the fundamental laser light to a laser light having a different wavelength, a holding member that holds at least a part of an element surface of the wavelength conversion element that crosses a polarization direction of the periodically poled structure, and an insulation layer that is provided between the holding member and the element surface. Electric resistivity of the insulation layer is 1×1010-15-2009
20090257462Laser device, laser display device, and laser irradiation device - The present invention provides a laser device having a high wavelength conversion efficiency and a wide wavelength width, and is suitable as a display light source. The laser device includes a fundamental wave generating section including a laser diode which has a plurality of luminous points and a bragg reflection structure, and generating a plurality of fundamental waves which has at least a pair of wavelengths different from each other, and a nonlinear optical element having a periodic polarization inversion structure, and generating harmonics corresponding to the plurality of fundamental waves, respectively.10-15-2009
20120195333BROADBAND PUMP LASER STABILIZED CASCADING WAVELENGTH CONVERSION FOR GENERATING RED, GREEN AND BLUE LASER RADIATIONS - A laser-wavelength conversion system with a broad temperature acceptance bandwidth is provided. The laser system includes a broad-band pump laser driving one or several cascaded laser wavelength converters, wherein the pump laser spectrum is broader than the spectral acceptance bandwidth of at least one of the laser wavelength converters. The broad pump laser spectrum allows some temperature variation in the laser wavelength converters, resulting in a broad temperature acceptance for the whole laser system. The laser system provides stable multi-color laser radiation for applications such as the red-green-blue laser projection TV.08-02-2012
20100238959SOLID-STATE LASER DEVICE AND IMAGE DISPLAY DEVICE - A semiconductor laser light source 09-23-2010
20090185588METHOD AND APPARATUS FOR PRODUCING ARBITRARY PULSETRAINS FROM A HARMONIC FIBER LASER - A system for producing frequency converted light includes a first seed laser operable to provide a first laser signal and a second seed laser operable to provide a second laser signal. The system also includes an optical combiner optically coupled to the first seed laser and the second seed laser. The optical combiner is operative to combine the first laser signal and the second laser signal into a combined laser signal. The system further includes a power amplifier optically coupled to the optical combiner. An intensity of both the first laser signal and the second laser signal are increased by the power amplifier. The system additionally includes a harmonic converter optically coupled to the power amplifier.07-23-2009
20090185589SEMICONDUCTOR LIGHT-EMITTING DEVICE - A light-emitting device which includes a semiconductor light-emitting element, and a plurality of plate-like wavelength conversion members which are disposed to face the semiconductor light-emitting element and are inclined with respect to the optical axis of excitation light emitted from the semiconductor light-emitting element, the plate-like wavelength conversion members containing respectively a fluorescent material which is capable of absorbing the excitation light and outputting light having a different wavelength from that of the excitation light, and the plate-like wavelength conversion members as a whole emitting visible light.07-23-2009
20090110013Multi-component wavelength conversion devices and lasers incorporating the same - According to one embodiment of the present invention, a frequency-converted laser source is provided wherein the wavelength conversion device comprises a plurality of waveguide components comprising respective input faces positioned in an effective focal field of the laser source. Individual ones of the waveguide components contribute different elements to a set of distinct wavelength conversion properties, defining a set of distinct wavelength conversion properties attributable to the waveguide components. The set of distinct wavelength conversion properties comprises properties representing phase matching wavelengths of the waveguide components, spectral widths of the waveguide components, conversion efficiency of the waveguide components, or combinations thereof. Additional embodiments are disclosed and claimed.04-30-2009
20100272134Rapid Alignment Methods For Optical Packages - A method for aligning an optical package including a semiconductor laser operable to emit an output beam having a first wavelength, a wavelength conversion device operable to convert the output beam to a second wavelength and adaptive optics configured to optically couple the output beam into a waveguide portion of an input facet of the wavelength conversion device includes measuring a power of light having a first wavelength emitted by or scattered from the wavelength conversion device as the output beam is scanned over the input facet of the wavelength conversion device along a first scanning axis. A power of light emitted from the wavelength conversion device is then measured as the output beam is scanned over the input facet along a second scanning axis. A position of the second scanning axis relative to an edge of the wavelength conversion device is based on the measured power of light having the first wavelength. The output beam is then aligned with the waveguide portion of the input facet based on the measured power of light having the second wavelength.10-28-2010
20090154508LIGHT-GENERATING APPARATUS WITH BROADBAND PUMPING LASER AND QUASI-PHASE MATCHING WAVEGUIDE - A light-generating apparatus comprises a broadband pumping laser configured to emit a broadband pumping light having a bandwidth larger than 10 nanometers and a broadband wavelength-converting device. The broadband wavelength-converting device includes a domain-inverted structure configured to convert the broadband pumping light into at least one conversion light by using at least a sum frequency generation mechanism and at least one waveguide positioned in the domain-inverted structure, and the waveguide has an input end configured to receive the broadband pumping light and an output end configured to output the conversion light. Since the light-generating apparatus uses the broadband pumping laser and the broadband wavelength-converting device, it is temperature-insensitive and speckle-free.06-18-2009
20100303109Proximity Coupled Athermal Optical Package Comprising Laser Source And Compound Facet Wavelength Conversion Device - Particular embodiments of the present disclosure bring an SHG crystal, or other type of wavelength conversion device, into close proximity with a laser source to eliminate the need for coupling optics, reduce the number of package components, and reduce package volume. According to one embodiment of the present disclosure, an optical package is provided comprising a laser source and a wavelength conversion device. The laser source is positioned such that the output face of the laser source is proximity-coupled to a waveguide portion of the input face of the wavelength conversion device. The input face of the wavelength conversion device comprises an α-cut facet and β-cut facet. The α-cut facet of the input face is oriented at a horizontal angle α, relative to the waveguide of the wavelength conversion device to permit proximity coupling of the output face of the laser source and the input face of the wavelength conversion device. The β-cut facet of the input face is oriented at a horizontal angle β, relative to the waveguide of the wavelength conversion device to cooperate with the horizontal tilt angle of the device to reduce back reflections from the input face of the wavelength conversion device into the laser source. Additional embodiments are disclosed.12-02-2010
20100303110Edge Bonded Optical Packages - Particular embodiments of the present disclosure bring an SHG crystal, or other type of wavelength conversion device, into close proximity with a laser source to eliminate the need for coupling optics, reduce the number of package components, and reduce package volume. According to one embodiment of the present disclosure, an optical package is provided comprising a laser source subassembly comprising a laser base and a wavelength conversion device subassembly comprising a converter base. The bonding interface of the laser base is bonded the complementary bonding interface of the converter base such that the laser output face can be proximity-coupled to the converter input face at an predetermined interfacial spacing x. Additional embodiments are disclosed and claimed.12-02-2010
20100322270INTRACAVITY FREQUENCY-CONVERTED OPTICALLY-PUMPED SEMICONDUCTOR LASER WITH RED-LIGHT OUTPUT - In a branched resonator OPS-laser arrangement, a combination of intra-cavity optical parametric generation and intra-cavity sum-frequency mixing provides output radiation in a range between about 550 nanometers about 700 nanometers from an OPS fundamental wavelength in a range between about 900 nm and about 1100 nm.12-23-2010
20110019704LASER BEAM SOURCE DEVICE, LIGHTING DEVICE, IMAGE DISPLAY APPARATUS, AND MONITORING APPARATUS - A laser beam source device includes: a light source which emits light having fundamental wavelength; a wavelength conversion element which converts the light having fundamental wavelength into light having conversion wavelength; a resonance element which transmits first light converted into the conversion wavelength light and reflects light not converted; an optical path conversion element which releases second light contained in the light reflected by the resonance element and converted into the conversion wavelength light in the same direction as the direction of the first light, and releases the light not converted toward the light source; and a supporting member. The resonance element is disposed in such a position that one end surface of the resonance element on the second light side is shifted to the supporting member from one end surface of the wavelength conversion element on the second light side.01-27-2011
20100027571Stabilized near-infrared laser - A traveling wave ring-resonator is configured to deliver CW single-longitudinal-mode radiation having a fundamental wavelength characteristic of an optically pumped gain-element in the resonator. The delivered fundamental-wavelength radiation is the output-radiation of the resonator. An optically nonlinear crystal is located in the resonator and arranged to convert a fraction of fundamental-wavelength radiation into second harmonic radiation. The conversion of this fraction of fundamental-wavelength radiation to second-harmonic radiation minimizes mode-hopping in the output radiation.02-04-2010
20100135344Controlling Second Harmonic Efficiency of Laser Beam Interactions - A method is provided for controlling second harmonic efficiency of laser beam interactions. A laser system generates two laser beams (e.g., a laser beam with two polarizations) for incidence on a nonlinear crystal having a preferred direction of propagation. Prior to incidence on the crystal, the beams are optically processed based on the crystal's beam separation characteristics to thereby control a position in the crystal along the preferred direction of propagation at which the beams interact.06-03-2010
20090028195SYSTEM AND METHOD FOR FREQUENCY CONVERSION OF COHERENT LIGHT - A system and method is disclosed for converting a frequency of a coherent light source. A birefringent nonlinear material is cut at an angle for critical phase matching to form a rectangular parallelepiped biased nonlinear crystal. The nonlinear crystal cut at a biased angle can be placed at an angle in a coherent light beam to enable the beam to be directed through the crystal over a substantially optimal phase matching path while minimizing back reflection of the coherent light beam to the coherent light source.01-29-2009
20100260215Split Control Of Front And Rear DBR Grating Portions - A method is provided for controlling a DBR laser diode wherein front and rear DBR section heating elements are controlled such that the reflectivity of the rear grating portion of the DBR section is lower than the reflectivity of the front grating portion of the DBR section. In this manner, lasing mode selection is dominated by the front grating portion and the front DBR section heating element can be controlled for wavelength tuning. In addition, the rear DBR section heating element can be controlled to narrow the spectral bandwidth of the DBR reflection spectra. Additional embodiments are disclosed and claimed.10-14-2010
20100098118LAPTOP-SIZE HIGH-ORDER HARMONIC GENERATION APPARATUS USING NEAR FIELD ENHANCEMENT - Disclosed herein is a laptop-size high-order harmonic generation apparatus using near field enhancement. The laptop-size high-order harmonic generation apparatus using near field enhancement includes a femtosecond laser generator, light transfer means for transferring light output from the femtosecond laser generator, micro patterns formed of metallic thin films and configured to have nano-sized apertures for generating near field enhancement when the light output from the light transfer means passes through the micro patterns, a gas supply unit for supplying inert gas to the light when the light transferred through the light transfer means passes through the micro patterns, and a vacuum chamber for accommodating the micro patterns and the gas supply unit under a vacuum atmosphere.04-22-2010
20080247428EFFICIENT HARMONIC GENERATION AND FREQUENCY CONVERSION IN MULTI-MODE CAVITIES - A doubly-resonant cavity structure includes at least one cavity structures so as to allow total frequency conversion for second or third-harmonic generation using χ10-09-2008
20090022188Frequency modulation in the optical alignment of wavelength-converted laser sources - Methods of controlling semiconductor lasers are provided where the semiconductor laser generates a wavelength-modulated output beam λ01-22-2009
20100329291MULTI-SPECTRAL LASER SOURCE EMPLOYING PERIODICALLY POLED CRYSTAL MIXER - A multi-spectral laser system produces first and second output frequencies by nonlinear mixing of a first, second, and third laser light frequency in a single periodically polled crystal, where the first and second output frequencies are separated by a range greater than the degeneracy of the crystal.12-30-2010
20110134944EFFICIENT PULSE LASER LIGHT GENERATION AND DEVICES USING THE SAME - A time delay is introduced in the optical path of the light pulse at fundamental wavelength relative to that for the fourth harmonic light pulse in a set up for generating the 506-09-2011
20090245298HYBRID SILICON LASER-QUANTUM WELL INTERMIXING WAFER BONDED INTEGRATION PLATFORM FOR ADVANCED PHOTONIC CIRCUITS WITH ELECTROABSORPTION MODULATORS - Photonic integrated circuits on silicon are disclosed. By bonding a wafer of compound semiconductor material as an active region to silicon and removing the substrate, the lasers, amplifiers, modulators, and other devices can be processed using standard photolithographic techniques on the silicon substrate. A silicon laser intermixed integrated device in accordance with one or more embodiments of the present invention comprises a silicon-on-insulator substrate, comprising at least one waveguide in a top surface, and a compound semiconductor substrate comprising a gain layer, the compound semiconductor substrate being subjected to a quantum well intermixing process, wherein the upper surface of the compound semiconductor substrate is bonded to the top surface of the silicon-on-insulator substrate.10-01-2009
20090154507Nonresonant Multiple Pass Nonlinear Structure - A system, a structure, and a method for the generation of second harmonic light are provided. A laser system comprises a seed laser that produces a fundamental frequency light, and a nonresonant multiple pass nonlinear structure generates a second harmonic light using the fundamental frequency light. A second harmonic outcoupler outputs the second harmonic light from the laser system and a reflecting structure reflects a remaining portion of the fundamental frequency light back into the nonresonant multiple pass nonlinear structure to generate additional second harmonic light.06-18-2009
20100220753MONOFREQUENCY INTRA-CAVITY FREQUENCY-TRIPLED CONTINUOUS LASER - A diode-pumped intra-cavity frequency-tripled continuous laser device, this device includes: an amplifying medium, a birefringent non-linear medium for frequency doubling, a birefringent non-linear medium for frequency tripling; and a polarizing medium arranged so as to constitute an intra-cavity birefringent filter or Lyot filter, the Lyot filter being adapted to allow monofrequency output emission from the laser device.09-02-2010
20100238960INTRACAVITY FREQUENCY CONVERSION OF LASER RADIATION - A laser device with frequency conversion, the device comprising a complex optical cavity comprising two cavity parts with two different levels of circulating intracavity power wherein there is placed at least one non-linear crystal (09-23-2010
20110103413Quasi-continuous wave ultraviolet light source with optimized output characteristics - The present application discloses various embodiments and methods of producing a quasi-CW UV laser system having the pulse duration and bandwidth to optimize harmonic conversion while producing a UV output configured to satisfy the constraints imposed by the optical system in optical communication therewith. More specifically, in one embodiment the present application discloses a method of optimizing at least one characteristic of the output of a laser system and includes providing a laser system having at least one spectral modification element in optical communication therewith, determining at least one optical characteristic of the output of the laser system for a given application, selecting the bandwidth of the output of the laser system to provide the determined characteristic, and adjusting the spectral modification element to provide the selected bandwidth.05-05-2011
20100290488Green Laser Generation Device, and Portable Electronic Machine Having Laser Projection Display Using the Said Device - The present invention relates to a green laser generation device which can be applied to a cellular phone, and more particularly to a green laser generation device which is ultra compact in size having volume of 1 cc or less, despite having a built-in thermo electric cooler, and has sufficient output power, despite having low power consumption, and a portable electronic machine having a laser projection display using the said device. The present invention provides a green laser generation device comprising an LD pump constituted by a photo diode; a fundamental generator generating infrared light laser according to the driving of the LD pump; a second harmonic generator generating green light using the generated infrared light laser; a polarization maintenance unit inserted between the fundamental generator and the second harmonic generator to maintain the polarization of the laser; and a temperature controller controlling an internal temperature of the green laser generation device.11-18-2010
20100246615INTRACAVITY HARMONIC GENERATION USING A RECYCLED INTERMEDIATE HARMONIC - Lasers configured for intracavity harmonic generation of second and higher order harmonic laser beam energy include mode-matching optics, such as a curved mirror, for recycling an unused portion of an intermediate harmonic laser beam energy (e.g., second harmonic laser beam energy) to improve higher order harmonic laser beam energy generation efficiency (e.g., third or higher order harmonic laser beam energy generation efficiency) without sacrificing beam quality of the higher order harmonic laser beam energy. The curved mirror may be positioned out of a resonant laser cavity of the laser. A radius of curvature and a position of the curved mirror are selected so that a beam radius and a beam divergence of the recycled second harmonic laser beam energy are essentially the same as a beam radius and a beam divergence of incoming second harmonic laser beam energy everywhere along a beam path of the incoming second harmonic laser beam.09-30-2010
20120128015Optical Pumping of Solid-State Laser Material Using Addressable Laser Array - An array of Surface Emitting Laser (SEL) elements can be used to efficiently pump a disk or rod of solid-state laser glass or crystal, or harmonic-generating crystal. Placing the laser array chip against or near the surface of this solid-state material provides very high and uniform optical power density without the need for lenses or fiber-optics to conduct the light from typical edge-emitting lasers, usually formed in a stack of bars. The lasers can operate in multi-mode output for highest output powers. Photolithography allows for an infinite variety of connection patterns of sub-groups of lasers within the array, allowing for spatial contouring of the optical pumping power across the face of the solid-state material. The solid-state material may be pumped either within (intra-cavity) or externally (extra-cavity) to the SEL laser array.05-24-2012
20120128014INTRA-CAVITY FREQUENCY DOUBLED MICROCHIP LASER OPERATING IN TEM00 TRANSVERSE MODE - A method for making a microchip laser includes preparing a laser-cavity chip assembly comprising a gain media, a first substantially flat surface, and a second substantially flat surface parallel to the first substantially flat surface. The method also includes forming a first reflective film on the first substantially flat surface to form a first cavity mirror, forming a second reflective film on the second substantially flat surface to form a second cavity mirror, and patterning at least one of the first reflective film or the second reflective film by removing at least a portion of the reflective film in the outer portion to form a center reflective portion in the one of the first reflective film or the second reflective film. The first cavity mirror and the second cavity mirror can suppress higher order transverse modes and produce a single TEM05-24-2012
20100208757METHOD OF FERROELECTRONIC DOMAIN INVERSION AND ITS APPLICATIONS - The present invention is related to a method to control the nucleation and to achieve designed domain inversion in single-domain ferroelectric substrates (e.g. MgO doped LiNbO08-19-2010
20120134377GENERATOR OF POLARIZATION ENTANGLED PHOTON PAIRS AND METHOD OF GENERATING THE SAME - A wavelength-multiplexed polarization entangled photon pair generator (05-31-2012
20090059974FREQUENCY-CONVERTED HIGH-POWER LASER WITH RECIRCULATING POLARIZATION CONTROL - A frequency-tripled laser-resonator has three resonator-branches. The branches are optically connected with each other by one or more polarization-selective devices. Unpolarized fundamental radiation is generated by optically pumping a gain-element in one branch of the resonator. The polarization-selective device provides that radiation in the other branches is plane-polarized, with the polarization planes of radiation entering the branches perpendicular to each other. Two optically nonlinear crystals are located in one of the branches of the resonator in which the fundamental radiation is plane-polarized and arranged to generate third-harmonic radiation. Three-branch resonators including two gain-elements having a optical relay therebetween, and a three-branch ring-laser-resonator are also disclosed.03-05-2009
20090059975LASER MODULE FOR PROJECTION DISPLAYS - A laser module with a linear laser diode array includes multiple, mutually separated laser cells. A nonlinear optical material serves to double the frequency of the radiation emitted by the laser cells. The linear laser diode array and the nonlinear optical material are so positioned relative to each other that the resulting frequency-doubled radiation propagates, within the nonlinear optical material and essentially within mutually separated columns associable with the laser cells, both in the direction of the radiation emitted by the laser cells and in the opposite direction. The laser module includes optical elements which divert the bidirectionally propagating frequency-doubled radiation in a manner whereby, upon diversion between the columns in the respective other direction, the radiation propagates in the nonlinear optical material, so that frequency-doubled light ultimately exits the nonlinear optical material in only one direction.03-05-2009
20100272135Self-Seeded Wavelength Conversion - A method of operating a frequency-converted laser source is provided. According to the method, the gain section of a laser diode is driven such that the pulse repetition frequency ν10-28-2010
20100008387WAVELENGTH CONVERSION APPARATUS, LASER LIGHT GENERATING APPARATUS AND WAVELENGTH CONVERSION METHOD - A wavelength conversion apparatus capable of keeping high wavelength conversion efficiency for a longer time than ever before is provided. A wavelength conversion apparatus includes: a wavelength conversion section including a nonlinear optical crystal, and performing wavelength conversion of incident laser light by allowing the incident laser light to pass through the nonlinear optical crystal; and a relative position control section, when wavelength conversion is performed by the wavelength conversion section, relatively displacing the incident position of the incident laser light in an incident plane into which the incident laser light enters of the nonlinear optical crystal in a direction including a projection direction component of a +C axis to the incident plane in the nonlinear optical crystal or a direction orthogonal to the projection direction component.01-14-2010
20090046749COHERENT LIGHT SOURCE - A coherent light source is provided with a light source unit for projecting a fundamental wave having a first wavelength, and a wavelength converting unit for projecting a second harmonic wave of the fundamental wave at a prescribed average power or more by receiving the fundamental wave. The coherent light source suppresses generation of sum frequency of the second harmonic wave and the fundamental wave, which causes unstable power. Therefore, a constitution is provided for keeping a walk-off angle of the fundamental wave and SFG light at 15 degrees or higher.02-19-2009
20120093180MULTIPLE EMITTER VECSEL - An extended cavity surface emitting laser has a first laser die with a first cavity and a first gain element and a second laser die with a second cavity and a second gain element. The first and second gain elements are in series to provide optical gain and optical feedback in an extended optical cavity configuration. The first and second gain elements provide optical gain and optical feedback in a common extended cavity with the first and second gain elements operating serially as a common extended cavity optical mode.04-19-2012
20110243163WEDGE-FACETED NONLINEAR CRYSTAL FOR HARMONIC GENERATION - Lasers and laser systems generate different wavelengths by nonlinear sum or difference frequency conversion. A wedge-faceted nonlinear crystal compensates for the spatial walk-off phenomenon associated with critical phase matching of a nonlinear crystal in the production of harmonic laser output at peak power.10-06-2011
20100202477WAVELENGTH CONVERSION LASER DEVICE - A wavelength conversion laser device includes a solid-state laser element having a waveguide structure including a laser medium that amplifies laser beams by providing a gain generated due to absorption of pump light to the laser beams and outputs a fundamental wave, and a wavelength conversion element having a waveguide structure including a nonlinear optical material that converts a part of a fundamental wave output from the solid-state laser element to a second harmonic, to resonate the fundamental wave by an optical resonator structure including the solid-state laser element and the wavelength conversion element and outputs a second harmonic from the wavelength conversion element. The solid-state laser element outputs a linearly polarized fundamental wave, and differentiates a polarization state of a fundamental wave having passed through the wavelength conversion element and entering into the solid-state laser element from linear polarization output from the solid-state laser element, so that wavelength conversion efficiency of the wavelength conversion element is not decreased in a peak wavelength of a gain band.08-12-2010
20080232412Surface-Emitting Laser and Laser Projector - A surface emitting laser (09-25-2008
20080225904Laser system - An apparatus/method may comprise a line narrowed pulsed lithography laser light source which may comprise: a seed pulse providing laser system which may comprise: a first pulsed seed laser producing seed pulses at a rate of X kHz; a second pulsed seed laser producing seed pulses at a rate of X kHz; an amplification system which may comprise: a first amplifier gain system which may comprise a first and a second pulsed gas discharge amplifier gain medium, each with a nominal center wavelength in the UV range, and each operating at ½ X kHz on output pulses from the first seed laser; a second amplifier gain system which may comprise a first and a second pulsed amplifier gain medium, each with a nominal center wavelength in the UV range, and each operating at ½ X kHz on output pulses from the second seed laser.09-18-2008
20130188658FREQUENCY-TRIPLED FIBER-MOPA - In a frequency-tripled fiber-MOPA, a pre-amplified plane-polarized seed-pulse having a fundamental frequency is divided into two pulse-components, plane-polarized in polarization-orientations at 90-degrees to each other. The fundamental-wavelength pulse-components are amplified in a common amplifier-fiber. The amplified components are separately propagated on different optical paths. One of the amplified components is frequency-doubled. The frequency-doubled component on one path and fundamental-frequency component on the other path are then combined on a common-path and sum-frequency mixed to provide a frequency-tripled pulse.07-25-2013
20100002735LASER SOURCE DEVICE, WAVELENGTH CONVERSION ELEMENT, METHOD OF MANUFACTURING WAVELENGTH CONVERSION ELEMENT, PROJECTOR, AND MONITORING DEVICE - A laser source device includes: a light emission unit which emits laser beam having first wavelength; a first mirror which selectively reflects S-polarized light contained in the first wavelength laser beam emitted from the light emission unit in a direction different from the direction toward the light emission unit and transmits second wavelength laser beam; a second mirror which receives laser beam reflected by the first mirror and reflects laser beam having first wavelength and contained in the received laser beam toward the first mirror; and a wavelength conversion element disposed between the first mirror and the second mirror and converts at least a part of S-polarized light contained in the received first wavelength laser beam into laser beam having second wavelength.01-07-2010
20090154509Laser Processing Apparatus, Method For Making Settings For The Laser Processing Apparatus, Program For Making Settings For The Laser Processing Apparatus, and Computer-Readable Recording Medium - It is an object to enable control according to an optimum temperature condition for a wavelength conversion device. There are provided a laser medium for creating fundamental-wave laser light with a fundamental frequency; a wavelength conversion device which, if the fundamental-wave laser light from the laser medium is inputted thereto, creates higher-harmonic-wave laser light with a harmonic wavelength of a higher order than the wavelength of the fundamental-wave laser light; a temperature measurement section for measuring the temperature of the wavelength conversion device; a temperature adjustment section for adjusting the temperature of the wavelength conversion device; a temperature control section for controlling the temperature adjustment section for changing the temperature of the wavelength conversion device within a predetermined range; an output monitoring section for measuring the laser power emitted from the wavelength conversion device at each temperature of the wavelength conversion device which is changed in temperature by the temperature control section; and a temperature setting section for setting the temperature of the wavelength conversion device at which the laser power measured by the output monitoring section has a maximum value, as an optimum temperature of the wavelength conversion device.06-18-2009
20130208741Laser architectures - Disclosed herein are architectures for VCSEL systems. By using high power IR VCSEL element(s), a bulk doubling material can be used to double the IR light and generate visible light (red, green, blue, or UV light) in a cavity, in either continuous wave (CW) or pulsed mode. The reflectivity of the output distributed Bragg reflector (DBR) of these VCSELs can be designed to increase the power in the cavity, rather than the power in the VCSEL laser. By enabling the use of a bulk doubling material in the cavity and directly doubling the VCSEL the device can be inexpensive, simpler, high efficiency, better reliability, and vastly improved manufacturing and alignment tolerances. There are a number of cavity architectures that can be used to double the IR light from the VCSEL(s). The VCSEL(s) can be single elements, or arrays with high intensity elements.08-15-2013

Patent applications in class Frequency multiplying (e.g., harmonic generator)