Coherent light generators inventions 09/06

20060209908 - An optical system for providing short laser-pulses: The present invention deals with optical systems for providing short laser pulses. An object of the invention is to provide an optical system providing compact and cost-effective short laser-pulses using fibers with anomalous dispersion and high non-linear thresholds. The object is achieved by a short pulse optical system for generating...

20060209909 - Fiber laser oscillator: A fiber laser oscillator 1 is provided with a pumping light source 30 for emitting pumping beams Lin; beam condensing means (light duct) 50 for condensing the pumping beams Lin emitted from the pumping light source 30; and a laser oscillation optical fiber 10 for receiving the pumping beams Lin...

20060209910 - Method and device for installing light emitting element: A method and apparatus for mounting a light emitting element, enabling positioning on an object with precision with reference to the optic axis of a light emitting element, and mounting the element.A suction head is inserted between a first camera and a second camera having relatively fixed optic axes, a...

20060209911 - Tunable laser: A tunable laser includes an optical waveguide alternately including a gain waveguide portion and a wavelength controlling waveguide portion, and a diffraction grating. The diffraction grating includes a gain diffraction grating and a wavelength controlling diffraction grating. A wavelength controlling region is configured such that the wavelength controlling waveguide portion...

20060209912 - Monolithic microchip laser with intracavity beam combining and sum frequency or difference frequency mixing: A method for producing low-noise laser output at various wavelengths and/or in various operation modes in a monolithic microchip laser comprises schemes of generating two fundamental beams in separate cavities, precise intracavity beam combination based on the walk-off effect in birefringent crystal, and wavelength conversion in nonlinear optical crystals. The...

20060209913 - Coherent light source and control method thereof, and display unit and laser display using them: In a display device that displays a video by scanning coherent light across a screen, modulation at high speeds and gradation are necessary for a coherent light source. An oscillation wavelength of a semiconductor laser outputting the fundamental wave is changed at high speeds through the plasma effect induced by...

20060209915 - Photovoltaic device: An aspect of the present invention provides a photovoltaic device having a first semiconductor layer of a first conduction type and a third semiconductor layer of a second conductivity type. At least one of the first and third semiconductor layers includes an amorphous semiconductor layer. The amorphous semiconductor layer has...

20060209914 - Semiconductor device and manufacturing method thereof: In order to reduce the parasitic capacitance of the device and obtain an enhanced high-speed response characteristic while assuring the reliability of the device, a semiconductor device is provided such that it comprises: a mesa structure formed on a semiconductor substrate and including a first cladding layer, an active layer,...

20060209917 - Control system for a two chamber gas discharge laser: The present invention provides a control system for a modular high repetition rate two discharge chamber ultraviolet gas discharge laser. In preferred embodiments, the laser is a production line machine with a master oscillator producing a very narrow band seed beam which is amplified in the second discharge chamber. Novel...

20060209916 - Very high repetition rate narrow band gas discharge laser system: A laser system and method is disclosed which may comprise a first line narrowed gas discharge laser system producing a first laser output light pulse beam at a pulse repetition rate of ≧2000 Hz; a second line narrowed gas discharge laser system producing a second laser output light pulse beam...

20060209918 - High power thin disk lasers: A device including an active mirror made of thin disk active medium having a pump surface and a mirror surface, means for cooling that contacts with the mirror surface of the active medium dissipating heat from said laser medium, pump beam illuminating the pump surface of said active mirror and...

20060209919 - Pumping light source for laser-active media: In order to improve a pumping light source for laser-active media comprising an outer member enclosing a gas discharge medium, a first electrode acting as a cathode and having a first electrode end located within the outer member, a second electrode acting as an anode and having a second electrode...

20060203859 - Compact multimode laser with rapid wavelength scanning: In accordance with the present invention, a compact laser system with nearly continuous wavelength scanning is presented. In some embodiments, the compact laser system can be scanned over a broad range. In some embodiments, the compact laser system can be scanned at high scan rates. In some embodiments, the compact...

20060203858 - Wavelength tunable semiconductor laser apparatus: Two laser channels operate in combination, and a combiner combines the light waves emitted from these laser portions (or laser channels) so as to cover one entire wavelength range. Specifically, an inter-grating element distance Lgrt1 of the first laser portion is set larger or smaller than an inter-grating element distance...

20060203860 - Laser device and laser module: A laser module includes a substrate 1, a first laser element 2 placed on the substrate 1, a second laser element 3 placed with an output surface opposed to the first laser element 2 on the substrate 1, and a mirror 7 placed between the first laser element 2 and...

20060203861 - Platemaking apparatus: A laser engraving machine has a recording drum 11 rotatable with a flexo sensitive material 10 mounted peripherally thereof, and a recording head 20 movable parallel to the axis of this recording drum 11. The recording head 20 includes a first laser source 21 for emitting a precision engraving beam...

20060203862 - Method and apparatus for cwdm optical transmitter with extended operating temperature range: An optical transmitter for coarse wavelength division multiplexed (CWDM) optical communication systems uses a conventional laser (e.g. laser diode) and in addition a heater element is provided thermally coupled to the laser. A thermal sensor and associated control circuit drive the heater so as to control the power consumed by...

20060203863 - Optical transmitter with a least pair of semiconductor laser diodes: The present invention is to provide an optical transmitter with reduced power consumption. The optical transmitter includes two laser diodes connected in series to each other, one of which is connected in the anode thereof to the first driver, while the other of which is connected in the cathode thereof...

20060203864 - Method and apparatus providing an output coupler for an optical beam: An optical output coupler having a reflector integrated in an evanescent coupler. In one aspect of the present invention, an apparatus according to an embodiment of the present invention includes first and second optical paths. An optical beam is to be directed through the first optical path. The apparatus also...

20060203865 - Buried heterostructure quantum cascade laser: A buried heterostructure quantum cascade laser structure uses reverse biased junction to achieve current blocking. Doping and ridge width of the structure may be adjusted to provide effective mode discrimination....

20060203867 - Laser diode chip, laser diode, and method for manufacturing laser diode chip: Both lateral side portions of a laser diode chip separated by the central portions of a p-type capping layer and a p-type clad layer and parallel to the horizontal edges of the cleavage planes of the chip are cut away by etching, so that the p-type capping layer and the...

20060203868 - Laser diode device: A laser diode device capable of obtaining high light efficiency and improving output by using an AlGaInN compound semiconductor as a material is provided. The laser diode device includes semiconductor layer which has an active layer and is made of a nitride Group III-V compound semiconductor containing at least one...

20060203866 - Laser diode package with an internal fluid cooling channel: A laser diode assembly has a laser diode. The laser diode has an emitting surface and a reflective surface opposing the emitting surface. The laser diode has first and second side surfaces between the emitting and reflective surfaces. A first electrically-insulating heat sink is attached to the first side surface...

20060203870 - Modulator integrated semiconductor laser device: A modulator integrated semiconductor laser device is provided. In the modulator integrated semiconductor laser device, a lower DBR (distributed Bragg reflector) layer is formed on the substrate, an active layer is formed on the lower DBR layer and includes a plurality of barrier layers alternating with a plurality of quantum...

20060203871 - Nitride semiconductor light emitting device and fabrication method thereof: A nitride semiconductor light emitting device includes: an active layer formed of a first III-V nitride semiconductor, the active layer having opposite surfaces which face each other; an alloy crystal layer formed of InxAlyGa1-x-yN (0<x<1, 0<y<1, 0<x+y<1) on one of the opposite surfaces of the active layer, the alloy crystal...

20060203869 - Semiconductor laser device: A semiconductor laser device includes a submount and a laser chip mounted on the submount. The submount has a front-end face inclined with respect to a light-emitting face of the laser chip and a rear-end face having a shape complementary to the shape of the front-end face....

20060203872 - Optical semiconductor device, electronic device, and method for producing optical semiconductor device: A resin molded portion 5 is provided with a first protruding molded portion 17 that protrudes from a first inclination portion 11 and a second protruding molded portion 18 that protrudes from a second inclination portion 12. The first protruding molded portion 17 and the second protruding molded portion 18...

20060203873 - Semiconductor laser diode: The present invention relates to a semiconductor laser device having a structure capable of emitting laser beam having a small spread angle and further of narrowing the spectrum width of the laser beam. The semiconductor laser device comprises a semiconductor laser array, a collimator lens, and an optical element having...

20060203874 - Backlight module and liquid crystal display having same: An exemplary backlight module (2) includes a light guide plate (20) and a reflective plate (26). The light guide plate includes an incident surface (21) and a bottom surface (23) adjacent the incident surface. The reflective plate is disposed adjacent to the bottom surface, and includes a reflective projection (268)...

20060203875 - Optical module comprising an image sensor and a lens unit that is supported on the sensitive surface of the image sensor: An optical module has a lens holder into which a lens array formed of three lenses and a diaphragm, for example, is inserted. The lenses, and optionally the diaphragm, are clearly oriented by way of the geometrical shape thereof such that no further optical adjustment is required while the lens...

20060198397 - Pulsed cascaded raman laser: A pulsed cascaded Raman laser (10) includes a pulsed light source (102) for generating a pulsed light (104) having an optical spectrum centered at a source wavelength. A non-linear Raman conversion fiber (106) is coupled to the pulsed light source (102). The pulsed light (104) traverses the nonlinear Raman conversion...

20060198398 - Pulsed laser sources: Various embodiments include modelocked fiber laser resonators that may be coupled with optical amplifiers. An isolator may separate the laser resonator from the amplifier, although certain embodiments exclude such an isolator. A reflective optical element on one end of the resonator having a relatively low reflectivity may be employed to...

20060198399 - Optical pulse lasers: The present invention provides pulsed lasers which employ carbon nanotubes, particularly layers of carbon nanotubes, as saturable absorbers, mode lockers or for Q-switching elements. The present invention also provides methods and materials for mode-locking and Q-switching of lasers in which carbon nanotubes are employed as non-linear optical materials and/or saturable...

20060198400 - Providing low-coherence light: The invention features an apparatus and an associated method for illuminating a target area. The apparatus includes reflectors defining a first optical cavity. The first optical cavity defines a first set of longitudinal modes. The apparatus includes a first gain medium defining a first gain band. The first gain medium...

20060198401 - Tunable resonator, tunable light source using the same, and method for tuning wavelength of multiple resonator: e

20060198402 - Energy stabilization of combined pulses from multiple lasers: A combined radiation pulse of a predetermined energy is provided by temporally and spatially overlapping four pulses from four extra-cavity, frequency-tripled lasers. Frequency tripling is effected in each laser by a second-harmonic generating crystal followed by a third-harmonic generating crystal. One of the lasers includes a Pockels cell preceding the...

20060198403 - Laser scanning unit including a shield: A laser scanning unit is provided comprising: a housing; a scanning device; a first pre-scan assembly generating a first light beam and directing the first light beam toward the scanning device; a second pre-scan assembly generating a second light beam and directing the second light beam toward the scanning device;...

20060198404 - Optical phase conjugation laser diode: A phase-conjugating resonator that includes a semiconductor laser diode apparatus that comprises a phase-conjugating array of retro-reflecting hexagon apertured hexahedral shaped corner-cube prisms, an electrically and/or optically pumped gain-region, a distributed bragg reflecting mirror-stack, a gaussian mode providing hemispherical shaped laser-emission-output metalized mirror. Wherein, optical phase conjugation is used to...

20060198405 - Method for performing eye safety measurements on laser emitter devices: A method of performing eye safety measurements on laser devices is disclosed. The laser is contained within a housing having a central bore. The method uses an optical detector having at least two zones to make separate measurements of both a direct power coming from the laser and an indirect...

20060198406 - Athermalisation of tuneable lasers: This invention describes a technique and apparatus to use any tuneable laser to generate a specified output frequency without controlling its temperature. This technique only involves a thermal sensor and a controller to determine the current(s) or voltage(s) applied to the grating or tuning section(s) to obtain the required wavelength....

20060198407 - Direct impingement cooling of a laser diode array: A laser diode array assembly. The assembly includes a plurality of vertical emitting laser diodes. Each laser diode has a vertical emitting surface and an exposed substrate surface opposite from the emitting surface. Each vertical emitting surfaces emit a laser beam. The assembly further includes one or more nozzles that...

20060198408 - Method of restoring setting values by managing pon network topology table in device accommodating plurality of epon ports: A method of restoring setting values by managing a passive optical network (PON) network topology table in a device accommodating a plurality of Ethernet passive optical network (EPON) ports includes the steps of: booting the device accommodating a plurality of EPON ports; a controller for restoring a previously set configuration...

20060198409 - Voltage dividing apparatus for preventing sudden increases in power to a laser diode: A voltage dividing apparatus for preventing sudden increases in power to a laser diode includes a laser diode module, a laser-driving unit and a Zener diode. The laser diode module includes a laser diode for receiving a driving current to emit light, and a photo diode for receiving the light...

20060198410 - Laser exposure apparatus for exposing a screen held in a frame: The subject matter of the invention is a laser exposure apparatus for exposing a screen (24) held in a frame (28), more specifically for Computer-to-Screen exposure. A low-cost method and a low-cost laser exposure apparatus of the type mentioned herein above by means of which the screen is readily held...

20060198411 - Total reflecting cavity for a solid state laser: A laser device in accordance with the present invention includes an enclosure that defines a pump cavity with a decreasing taper, from a maximum width at an input end to a minimum width at an output end of the cavity. A laser slab is positioned within the pump cavity by...

20060198412 - Grating-coupled surface emitting laser with gallium arsenide substrate: This disclosure concerns grating-coupled surface emitting (GSE) lasers with Gallium Arsenide (GaAs) substrates. In one example, a GSE laser includes a GaAs substrate, a lower cladding layer disposed on the substrate, a Dilute Nitride active region disposed on the lower cladding layer, and an upper cladding layer disposed on the...

20060198413 - Radiation-emitting semiconductor body for a vertically emitting laser and method for producing same: The present invention concerns a radiation-emitting semiconductor body with a vertical emission direction, a radiation-generating active layer, and a current-conducting layer having a current-blocking region and a current-permeable region, the semiconductor body being provided for a vertically emitting laser with an external resonator, and the external resonator having a defined...

20060198414 - Semiconductor optical device: In a semiconductor optical device, the semiconductor substrate has a primary surface intersecting with a predetermined axis. The lower cladding region of the first conductive type is provided on the primary surface thereof. The lower cladding region includes ridge regions and a base region. The base region has first portions...

20060198415 - Tunable laser, optical module, and control method thereof: The object is to overcome issues of the conventional tunable laser and achieve a highly reliable, high-performance, and low-price tunable laser by a simpler structure than a wavelength monitor. The tunable laser comprises: a multiple ring resonator that is formed by coupling ring resonant elements having different optical path length...

20060198416 - Wavelength tunable laser: A wavelength tunable laser comprises a multiple ring resonator, an input/output side waveguide coupled to a ring resonator, a reflection side waveguide coupled to a ring resonator, a multiple ring resonator, a PLC substrate where the input/output side waveguide and the reflection side waveguide are formed, a high reflection film...

20060198417 - Apparatus and method for adjusting external-cavity lasers: Adjustment of a tunable external-cavity laser is simplified by incorporating a mount that includes a base, a main body, a reflecting surface, a diffracting surface and a hinge coupling the main body to the base. The laser additionally includes a light source, a converging lens located to receive light from...

20060198418 - Light emitting device: The present invention provides a light emitting device comprising: an excitation light source which radiates excitation light; a wavelength converting member which absorbs and converts the wavelength of at least part of the excitation light radiated from the excitation light source, and releases light with a predetermined wavelength band; a...

20060198397 - Pulsed cascaded raman laser: A pulsed cascaded Raman laser (10) includes a pulsed light source (102) for generating a pulsed light (104) having an optical spectrum centered at a source wavelength. A non-linear Raman conversion fiber (106) is coupled to the pulsed light source (102). The pulsed light (104) traverses the nonlinear Raman conversion...

20060198398 - Pulsed laser sources: Various embodiments include modelocked fiber laser resonators that may be coupled with optical amplifiers. An isolator may separate the laser resonator from the amplifier, although certain embodiments exclude such an isolator. A reflective optical element on one end of the resonator having a relatively low reflectivity may be employed to...

20060198399 - Optical pulse lasers: The present invention provides pulsed lasers which employ carbon nanotubes, particularly layers of carbon nanotubes, as saturable absorbers, mode lockers or for Q-switching elements. The present invention also provides methods and materials for mode-locking and Q-switching of lasers in which carbon nanotubes are employed as non-linear optical materials and/or saturable...

20060198400 - Providing low-coherence light: The invention features an apparatus and an associated method for illuminating a target area. The apparatus includes reflectors defining a first optical cavity. The first optical cavity defines a first set of longitudinal modes. The apparatus includes a first gain medium defining a first gain band. The first gain medium...

20060198401 - Tunable resonator, tunable light source using the same, and method for tuning wavelength of multiple resonator: e

20060198402 - Energy stabilization of combined pulses from multiple lasers: A combined radiation pulse of a predetermined energy is provided by temporally and spatially overlapping four pulses from four extra-cavity, frequency-tripled lasers. Frequency tripling is effected in each laser by a second-harmonic generating crystal followed by a third-harmonic generating crystal. One of the lasers includes a Pockels cell preceding the...

20060198403 - Laser scanning unit including a shield: A laser scanning unit is provided comprising: a housing; a scanning device; a first pre-scan assembly generating a first light beam and directing the first light beam toward the scanning device; a second pre-scan assembly generating a second light beam and directing the second light beam toward the scanning device;...

20060198404 - Optical phase conjugation laser diode: A phase-conjugating resonator that includes a semiconductor laser diode apparatus that comprises a phase-conjugating array of retro-reflecting hexagon apertured hexahedral shaped corner-cube prisms, an electrically and/or optically pumped gain-region, a distributed bragg reflecting mirror-stack, a gaussian mode providing hemispherical shaped laser-emission-output metalized mirror. Wherein, optical phase conjugation is used to...

20060198405 - Method for performing eye safety measurements on laser emitter devices: A method of performing eye safety measurements on laser devices is disclosed. The laser is contained within a housing having a central bore. The method uses an optical detector having at least two zones to make separate measurements of both a direct power coming from the laser and an indirect...

20060198406 - Athermalisation of tuneable lasers: This invention describes a technique and apparatus to use any tuneable laser to generate a specified output frequency without controlling its temperature. This technique only involves a thermal sensor and a controller to determine the current(s) or voltage(s) applied to the grating or tuning section(s) to obtain the required wavelength....

20060198407 - Direct impingement cooling of a laser diode array: A laser diode array assembly. The assembly includes a plurality of vertical emitting laser diodes. Each laser diode has a vertical emitting surface and an exposed substrate surface opposite from the emitting surface. Each vertical emitting surfaces emit a laser beam. The assembly further includes one or more nozzles that...

20060198408 - Method of restoring setting values by managing pon network topology table in device accommodating plurality of epon ports: A method of restoring setting values by managing a passive optical network (PON) network topology table in a device accommodating a plurality of Ethernet passive optical network (EPON) ports includes the steps of: booting the device accommodating a plurality of EPON ports; a controller for restoring a previously set configuration...

20060198409 - Voltage dividing apparatus for preventing sudden increases in power to a laser diode: A voltage dividing apparatus for preventing sudden increases in power to a laser diode includes a laser diode module, a laser-driving unit and a Zener diode. The laser diode module includes a laser diode for receiving a driving current to emit light, and a photo diode for receiving the light...

20060198410 - Laser exposure apparatus for exposing a screen held in a frame: The subject matter of the invention is a laser exposure apparatus for exposing a screen (24) held in a frame (28), more specifically for Computer-to-Screen exposure. A low-cost method and a low-cost laser exposure apparatus of the type mentioned herein above by means of which the screen is readily held...

20060198411 - Total reflecting cavity for a solid state laser: A laser device in accordance with the present invention includes an enclosure that defines a pump cavity with a decreasing taper, from a maximum width at an input end to a minimum width at an output end of the cavity. A laser slab is positioned within the pump cavity by...

20060198412 - Grating-coupled surface emitting laser with gallium arsenide substrate: This disclosure concerns grating-coupled surface emitting (GSE) lasers with Gallium Arsenide (GaAs) substrates. In one example, a GSE laser includes a GaAs substrate, a lower cladding layer disposed on the substrate, a Dilute Nitride active region disposed on the lower cladding layer, and an upper cladding layer disposed on the...

20060198413 - Radiation-emitting semiconductor body for a vertically emitting laser and method for producing same: The present invention concerns a radiation-emitting semiconductor body with a vertical emission direction, a radiation-generating active layer, and a current-conducting layer having a current-blocking region and a current-permeable region, the semiconductor body being provided for a vertically emitting laser with an external resonator, and the external resonator having a defined...

20060198414 - Semiconductor optical device: In a semiconductor optical device, the semiconductor substrate has a primary surface intersecting with a predetermined axis. The lower cladding region of the first conductive type is provided on the primary surface thereof. The lower cladding region includes ridge regions and a base region. The base region has first portions...

20060198415 - Tunable laser, optical module, and control method thereof: The object is to overcome issues of the conventional tunable laser and achieve a highly reliable, high-performance, and low-price tunable laser by a simpler structure than a wavelength monitor. The tunable laser comprises: a multiple ring resonator that is formed by coupling ring resonant elements having different optical path length...

20060198416 - Wavelength tunable laser: A wavelength tunable laser comprises a multiple ring resonator, an input/output side waveguide coupled to a ring resonator, a reflection side waveguide coupled to a ring resonator, a multiple ring resonator, a PLC substrate where the input/output side waveguide and the reflection side waveguide are formed, a high reflection film...

20060198417 - Apparatus and method for adjusting external-cavity lasers: Adjustment of a tunable external-cavity laser is simplified by incorporating a mount that includes a base, a main body, a reflecting surface, a diffracting surface and a hinge coupling the main body to the base. The laser additionally includes a light source, a converging lens located to receive light from...

20060198418 - Light emitting device: The present invention provides a light emitting device comprising: an excitation light source which radiates excitation light; a wavelength converting member which absorbs and converts the wavelength of at least part of the excitation light radiated from the excitation light source, and releases light with a predetermined wavelength band; a...