Coherent light generators inventions 04/06

20060088066 - Q-modulated semiconductor laser: A Q-modulated semiconductor laser comprises an optical gain section and an electro-absorptive modulator section, separated by a vertically etched air gap acting as a partially reflecting mirror. The modulator section is placed inside an anti-resonant Fabry-Perot cavity and acts as the rear reflector of the laser. The change of the...

20060088067 - Apparatus and method for face cooling of optical components of a laser system: A cooling system for use in with a transmissive optical element of a high average power laser (HAP). The system includes at least one optically transmissive element (TOC) that is held by a differential pressure in thermal contact with a heat sink assembly. In one embodiment, the heat sink assembly...

20060088068 - Low noise swept wavelength laser system and method: The invention provides a swept wavelength laser system comprising: a module providing a laser source with an optical output where the laser wavelength sweeps a wavelength range of the laser source with low wavelength noise at a sweep frequency rate; and a real-time high speed single measurement of an optical...

20060088069 - Uncooled, low profile, external cavity wavelength stabilized laser, and portable raman analyzer utilizing the same: The current invention relates to several different ways to realize “uncooled lasers” (i.e., a laser source without a temperature stabilization element, such as a thermal electric cooler) which have a sufficiently stable, narrow-linewidth source as to be useful as a Raman pump source in portable instruments and systems. These include...

20060088071 - Laser driver controller for safe operation of laser diode-based optical transmitters: A method, apparatus and system for controlling operation of a laser driver to limit emission levels of laser diodes each producing different monitor photocurrents are disclosed. In one embodiment, a laser driver controller includes a control signal generator configured to generate a single control signal to concurrently regulate an average...

20060088070 - Semiconductor laser driving device, semiconductor laser driving method, and image forming apparatus using semiconductor laser driving device: In a semiconductor laser driving device and method, a first current below an oscillation threshold current of a semiconductor laser is outputted to the laser invariably. A second current needed for light emission of the laser responsive to an input signal is outputted to the laser. A third current for...

20060088072 - Semiconductor laser apparatus: A GaN system stripe type semiconductor laser having an index guiding structure, and producing higher mode or multimode oscillation in the transverse mode, which is constructed such that the horizontal beam radiation angle of each of a plurality of the emitting regions is minimized to provide a high luminance focused...

20060088073 - Method and apparatus for carrying out a laser operation and use of a quick-change filter in such a laser operation: A method and apparatus for carrying out a laser operation, wherein a laser source is provided, wherein lasing gas is supplied from at least one lasing gas source to the laser source for the formation of a laser beam, wherein, with the aid of the laser beam, an operation is...

20060088074 - Amplified beam source: Directing an input light beam into a laser diode operated at a power below that required for lasing stimulates emissions, resulting in an amplified output beam. A dynamic steering system can focus the input beam onto front face of the laser diode. The steering system optionally includes an optical element...

20060083272 - Broadband light source and method for fabricating the same: Disclosed are a broadband light source and a method of fabricating the same. The method includes the steps of forming a lower clad on a substrate, forming an active layer having a multiple well structure on the lower clad (so as to generate light having a broad wavelength band), sequentially...

20060083273 - Temperature tuning the wavelength of a semiconductor laser using a variable thermal impedance: An apparatus is described in which the temperature of a semiconductor laser (or other device) can be set to a desired value by using the heat generated by the laser itself in conjunction with an adjustable thermal impedance heat sink to effect the desired temperature rise....

20060083274 - System and method for controlling wavelength of a laser beam: A system of controlling a wavelength of a laser beam is provided. The system comprises a stage for supporting a wafer, an optical convergence unit for emitting the laser beam moving in an optical path toward the stage, and a specific wavelength detecting sensor. The specific wavelength detecting sensor is...

20060083275 - Method for operating a multi-channel optoelectronic module: One example of a method for operating a transceiver includes selecting a first operating wavelength from a set of operating wavelengths. Next, a first control value is accessed that corresponds to the first operating wavelength. The first control value also corresponds to a first operating temperature of the transceiver, and...

20060083276 - Cryogenically cooled solid state lasers: Methods and constructions for cryogenically cooled solid state lasers are provided that allow the cooling channels to be embedded within the heat sinks used to conductively cool the laser medium. Several gain medium geometries are disclosed that are compatible with efficient and straight forward cryogenic cooling techniques using practical pump...

20060083277 - Optically pumped frequency standard with reduces ac stark shift: An apparatus for generating a stabilized frequency signal is disclosed. The apparatus includes a quantum absorber having first, second, and third energy states. The quantum absorber is irradiated by a first radiation source that generates electromagnetic radiation having a frequency, νL, that induces transitions between the first and third energy...

20060083278 - Method and structure for deep well structures for long wavelength active regions: Subwells are added to quantum wells of light emitting semiconductor structures to shift their emission wavelengths to longer wavelengths. Typical applications of the invention are to InGaAs, InGaAsSb, InP and GaN material systems, for example....

20060083279 - Semiconductor laser: A semiconductor laser in which six layers are grown on one another, over an Si—GaAs substrate, in the following order: an Si—GaAs buffer layer, an Si—AlGaInP cladding layer, an active layer, an Mg—AlGaInP cladding layer, an Mg—AlGaInP band discontinuity reduction layer, and a Zn—GaAs contact layer. In this configuration, the...

20060083280 - Method for producing multilayers on a substrate: The invention relates to a method for producing a multilayer on a receiving substrate, including the following steps: the formation of an initial substrate comprising a first material layer formed on the surface of a supporting substrate made of a second material, molecular adhesion bonding of the surface of the...

20060083281 - Semiconductor light emitting device, backlight device for liquid crystal display: A semiconductor light emitting device of the present invention includes a plurality of light emitting elements, a package body for storing the light emitting elements, wiring patterns being electrically connected to the light emitting elements, and Au wires for electrically connecting the light emitting elements and the wiring patterns, the...

20060083282 - Surface-emitting laser, method for manufacturing surface-emitting laser, device and electronic apparatus: Surface-emitting lasers are provided that can readily make highly accurate dimensions at the center axis of a resonator. A surface-emitting laser is characterized in that a lens layer in a convex lens shape having an apex portion that is flat is disposed on one end portion of a resonator....

20060083283 - Surface-emitting laser, method for manufacturing surface-emitting laser, device and electronic apparatus: Surface-emitting lasers are provided that can reduce the laser emission angle. Methods for manufacturing the surface-emitting lasers, devices and electronic apparatuses are also provided. The surface-emitting laser has a lens layer formed from semiconductor having a lens shape, that is a component of a resonator of the surface-emitting laser, and...

20060083284 - Method for increasing the dynamic range of a cavity enhanced optical spectrometer: A doubled, external cavity laser comprises an external cavity pump laser section and an extra-cavity frequency doubling section. The pump laser section comprises an edge-emitting, semiconductor chip having: i) an anti-reflection coating on the chip facet facing the cavity ii) a low reflectivity coating on the output facet of the...

20060078009 - Optical fiber, optical fiber amplifier, and optical fiber laser light source: An optical fiber can efficiently excite metallic ions by a pump lightwave, and an optical fiber amplifier and an optical fiber laser light source both incorporate the optical fiber. The optical fiber comprises (a) a solid region that has a first region doped with metallic ions and a second region...

20060078010 - Modulation frequency tunable optical oscillator: Provided is a millimeter-wave band frequency optical oscillator that can be used as an oscillation frequency signal source for a millimeter-wave forwarded to wireless subscribers from a base station of a millimeter-wave wireless subscriber communication system for a next generation (e.g., fifth generation) ultra-high speed wireless internet service. A pair...

20060078011 - Injection-seeded optical parametric oscillator and system: Optical parametric oscillators (OPO) and systems are provided. The OPO has a non-linear optical material located between two optical elements where the product of the reflection coefficients of the optical elements are higher at the output wavelength than at either the pump or idler wavelength. The OPO output may be...

20060078013 - Laser drilling system and method for flexible printed circuit board: A laser drilling system for flexible printed circuit board includes a first mirror, a second mirror, a laser crystal, a third harmonic generator and a second harmonic generator. The first mirror and the second mirror are spaced apart and defined a resonator cavity therebetween. The laser crystal is disposed in...

20060078012 - Optical element, optical system, laser device, exposure device, mask testing device and high polymer crystal processing device: The generatrix directions of cylindrical lenses 11a and 11b are perpendicular to the optical axis, and are perpendicular to each other. As a result, the optical system combining the cylindrical lenses 11a and 11b can achieve the same optical effect as a spherical lens. This system is characterized by the...

20060078014 - Integrated modulator/laser assembly and a method of producing same: An laser/modulator assembly includes a laser source, such as a distributed feedback (DFB) laser, and a modulator, such as an electro-absorption modulator (EAM), integrated along a common waveguide. The waveguide has a distal end bent to define an inner side of the bent waveguide. A low reflectivity facet is arranged...

20060078016 - Matched filter used as an integral part of an sbs system for within cavity pulse reconstruction: The invention is a high power laser source, which includes a diode pumped laser having an oscillator that produces an output laser pulse. The output laser pulse is passed through a matched filter. The filter filters and focuses the output laser pulse into an SBS cell such that the SBS...

20060078015 - Zonal lenslet array: The invention includes a master lens, which initially focuses a laser pulse, and then the pulse passes through a zonal lenslet array, which uses different lenslet elements that provide for predetermined focal lengths so as to establish a three or two dimensional, predetermined dispersion of foci of the laser pulse....

20060078018 - Laser drive device and image forming apparatus incorporating the same: An inexpensive laser drive device which is capable of driving a laser for emission of an appropriate amount of light. Electric currents supplied from a supply current control device formed in an integrated circuit to a plurality of predetermined ports of the integrated circuit are turned on and off by...

20060078017 - Lpp type extreme ultra violet light source apparatus and driver laser for the same: A driver laser for EUV light source apparatus which driver laser simultaneously achieves short-pulsing and multi-line oscillation. The driver laser includes: a short-pulse multi-line oscillated CO2 laser oscillator having a device that shortens width of pulses included in a laser beam to be output and a device that suppresses amplitude...

20060078019 - Solid state laser insensitive to temperature changes: A temperature insensitive diode-pumped solid state laser is disclosed in this invention. The components of the laser are optimized with temperature insensitive design, making the laser capable of operating in a wide temperature range without using any cooling/heating system to maintain the temperature of its components....

20060078020 - Integrated semiconductor laser device and method of fabricating the same: An integrated semiconductor laser device capable of improving the properties of a laser beam and reducing the cost for optical axis adjustment is provided. This integrated semiconductor laser device comprises a first semiconductor laser element including a first emission region and having either a projecting portion or a recess portion...

20060078022 - Nitride semiconductor laser device: A nitride semiconductor laser device has an improved stability of the lateral mode under high output power and a longer lifetime, so that the device can be applied to write and read light sources for recording media with high capacity. The nitride semiconductor laser device includes an active layer, a...

20060078021 - Semiconductor laser unit and optical pickup device including the semiconductor laser unit: The present invention provides a semiconductor laser unit which realizes efficient heat dissipation, reduction in size, high-density integration of optical elements, prevention of a light-receiving element from being polluted with dust, and simple structure for easy assembly. The semiconductor laser unit includes: (a) a metal plate having a first recessed...

20060078023 - Laser diode and method of fabricating the same: A laser diode and a method of fabricating the same are provided. An embodiment of the laser includes a substrate; at least one material layer formed on the substrate and having a current passing region and a current block region which is composed of oxide and disposed at both sides...

20060078025 - Ridge waveguide semiconductor laser and method of manufacturing the same: A substrate, a laminated structure formed above the substrate and including a first cladding layer, an active layer, and a second cladding layer each containing a compound semiconductor, a current confinement layer containing a compound semiconductor, which is formed on the second cladding layer so as to have an opening,...

20060078024 - Semiconductor laser device: A semiconductor laser device having a far field pattern (FFP) with a Gaussian distribution that is less prone to ripples is provided. The semiconductor laser device comprises a semiconductor layer having a first conductivity type, an active layer, a semiconductor layer having a second conductivity type, a waveguide region formed...

20060078026 - Alas/gaas alloy to enhance n-type doping in algaas distributed bragg reflector: Distributed Bragg reflector (DBR) with reduced DX centers. A DBR includes an AlAs region. The AlAs region includes essentially homogeneous AlAs. The DBR further includes a AlGaAs region. The AlGaAs region includes alternating thin layers of AlAs and GaAs. The alternating thin layers of AlAs and GaAs are arranged such...

20060078027 - Laser pumping unit and high power laser device tunnel junction including the same: Embodiments include a laser pumping unit and a high power vertical external cavity surface emitting laser (VECSEL) device including the same. The laser pumping unit easily diffuses current in a traverse direction by using a tunnel junction. The laser pumping unit may include a substrate, a lower distributed brag reflector...

20060078028 - Discharge excitation type pulse laser apparatus: For the purpose of providing a discharge excitation type pulse laser apparatus capable of reducing disturbance of the discharge space caused by shock waves, the discharge excitation type pulse laser apparatus according to the present invention is designed for generating a pulsed main discharge by applying a high voltage between...

20060078029 - Method for producing a waveguide structure in a surface-emitting semiconductor laser and surface-emitting semiconductor laser: Methods for producing surface-emitting semi-conductor lasers with tunable waveguiding are disclosed. The laser comprises an active zone containing a pn-transition, surrounded by a first n-doped semiconductor layer and at least one p-doped semiconductor layer. In addition to a tunnel junction on the p-side of the active zone, the tunnel junction...

20060078031 - Ingan led pumped ii-vi semiconductor laser: An optically pumped semiconductor laser in accordance with the present invention includes a II-VI semiconductor laser chip A plurality of InGaN LEDs provides optical pump light for optically pumping the laser chip. An optical arrangement collects the pump light from the LEDs and directs the pump light to light-concentrating optical...

20060078030 - Solid laser laterally pumped with focussed light from diodes in multiple flows: The invention relates to a solid laser, wherein a laser active material is pumped with the aid of at least one pump light source, e.g. of one of several laser diode arrays, at least in an approximately perpendicular manner in relation to the axis of a laser beam extending essentially...

20060078032 - Method, system and apparatus for an enhanced electrically pumped oxygen iodine laser: In one embodiment of the present invention an oxygen iodine laser includes a gas mixing section. Ground state oxygen and a carrier gas are introduced into the first gas mixing section, sometimes separately. The laser includes a discharge region to generate at least said excited oxygen from the flow of...

20060078033 - Self-coherent combining technique for high power laser implementation and method: An optical arrangement comprising first and second guided structures for providing first and second beams of electromagnetic energy and a node for coherently combining said first and second beams in free space, that is, with an unguided structure. In the illustrative embodiment, the first and second structures are first and...

20060078034 - Cryogenic liquid oxidizer cooled high energy system: A high energy system comprising a high energy electrical device powered by an electrical generator both of which are cooled by a cryogenic liquid oxidant stored in a storage tank. A power turbine powered by a combustor using fuel and the oxidant drives the electrical generator. A turbopump powered by...

20060072634 - Calibration methods for tunable lasers: Methods for calibrating tunable lasers. Various operational characteristics of a tunable laser, such as an external cavity diode laser (ECDL), are modeled using corresponding modeling equations. Corresponding calibration processes are performed for each operational characteristics to derive parameters corresponding to each modeling equation. In one embodiment, the calibration processes relate...

20060072631 - Method for opimising the calibration process of tuneable laser: A method relating to the calibration of tuneable lasers is described. The method provides for the provision of correct control currents so as to achieve each of desired output frequencies from the laser. The correct currents are determined by forming a matrix of the output characteristics of the laser at...

20060072633 - Ring laser semiconductor spectroscopy system: An optical power control system for a semiconductor source spectroscopy system controls power fluctuations in the tunable signal from the spectroscopy system and thus improves the noise performance of the system. This general solution has advantages relative to other systems that simply detect reference power levels during the scan and...

20060072632 - Semiconductor laser with tilted fabry-perot tunable filter: An optical power control system for a semiconductor source spectroscopy system controls power fluctuations in the tunable signal from the spectroscopy system and thus improves the noise performance of the system. This general solution has advantages relative to other systems that simply detect reference power levels during the scan and...

20060072635 - Stabilized frequency-converted laser system: A laser system includes an optically pumped laser resonator that produces a fundamental-wavelength beam. A temperature-tuned frequency converter outside the laser resonator converts a portion of the fundamental-wavelength beam to a frequency-converted beam. The frequency converter includes at least one temperature-tuned optically nonlinear crystal. The power and position of the...

20060072636 - Laser output light pulse beam parameter transient correction system: An apparatus and method for producing laser output light pulses in bursts of pulses, at a selected pulse repetition rate, forming a laser output light beam, separated by an off time is disclosed, which may comprise a laser output light pulse beam parameter adjustment system, which may comprise a laser...

20060072637 - Controller for operating a portable lighting device: Embodiments of the invention offer multiple modes of portable light power control with a single momentary switch. In some embodiments, when the switch is pressed and held on, the laser operates in momentary mode and is active until the switch is released. If the switch is pressed and then immediately...

20060072638 - External cavity type tunable laser source: An external cavity type tunable laser source has a laser diode which cooperates with a reflecting section to constitute an external cavity, and outputs laser light, a laser driving circuit which supplies a laser driving current to the laser diode, a random noise generator which generates a noise current whose...

20060072640 - Vertical cavity surface emitting laser having multiple top-side contacts: A VCSEL with undoped mirrors. An essentially undoped bottom DBR mirror is formed on a substrate. A periodically doped first conduction layer region is formed on the bottom DBR mirror. The first conduction layer region is heavily doped at a location where the optical electric field is at about a...

20060072639 - Vertical cavity surface emitting laser with undoped top mirror: A VCSEL with undoped top mirror. The VCSEL is formed from an epitaxial structure deposited on a substrate. A doped bottom mirror is formed on the substrate. An active layer that includes quantum wells is formed on the bottom mirror. A periodically doped conduction layer is formed on the active...

20060072641 - Semiconductor laser element and monolithic two-wavelength semiconductor laser device: In the semiconductor laser element and the monolithic two-wavelength semiconductor laser device, an active layer 6 is formed above an n-type GaAs substrate 1, and a p-type AlGaInP clad layer 8 is formed above the active layer 6. Furthermore, an n-type AlGaInP block layer 13 having a refractive index nearly...

20060072642 - Photonic crystal laser sensors and methods: A sensor apparatus includes a laser optically coupled to a photonic crystal structure configured to provide an evanescent field through a sensed medium region such that the photonic crystal structure functions as a cavity/resonator for the laser....