Coherent light generators inventions 06/06

20060140227 - Increased laser output energy and average power at wavelengths below 35 nm: Saturated tabletop lasers having increased output energy and operating at 5 Hz repetition rate, were demonstrated at wavelengths about 18.9 nm for molybdenum targets, 16.4 nm for ruthenium targets, 14.7 nm for palladium targets, 13.9 nm for silver targets, and 13.2 nm for cadmium targets in transitions of nickel-like ions....

20060140229 - Apparatus as tuning filter: An apparatus as a tuning filter is provided for tuning the wavelength of a laser or a filter between extensive bandwidths, including a reflecting element, an optical system and a movable mount set up in the same optical path in order. The optical system focuses light on the reflecting element...

20060140228 - Semi-integrated designs with in-waveguide mirrors for external cavity tunable lasers: Semi-integrated external cavity diode laser (ECDL) designs including integrated structures comprising a gain section, modulator section, and optional phase control section. Each integrated structure includes a waveguide that passes through each of the sections, with the waveguide further including an in-waveguide mirror. The in-waveguide mirror defines one end of an...

20060140230 - Processing a memory link with a set of at least two laser pulses: A set (50) of laser pulses (52) is employed to sever a conductive link (22) in a memory or other IC chip. The duration of the set (50) is preferably shorter than 1,000 ns; and the pulse width of each laser pulse (52) within the set (50) is preferably within...

20060140231 - Method of controlling output of laser diode and output control device of laser diode having function of charging control parameter: A method of controlling an output of a laser diode and an output control device of a laser diode having a function of changing the control parameter are provided. The method includes setting an output auto-control section of a laser diode, sampling a digital output voltage of the laser diode...

20060140232 - Arrangement for the generation of a pulsed laser beam of high average output: The invention is directed to an arrangement for generating a pulsed laser beam with high average output, in particular for generating a hot plasma which emits extreme ultraviolet (EUV) radiation. It is the object of the invention to find a novel possibility for generating a laser beam with a high...

20060140233 - Laser driver with integrated bond options for selectable currents: A programmable laser driver may be programmed to meet the characteristics of a particular laser. Traditionally, external resistors are used to bias the driver and program the value of the drive current to suit a particular laser. Embodiments of the present invention comprise integrating a plurality of resistors with the...

20060140234 - Surface emitting laser device having double channeled structure: Embodiments provide a vertical external cavity surface emitting laser (VECSEL) that may provide a uniform current density in an active layer using a double current injecting channel. The surface emitting laser device may include a double channel current injection structure for uniformly applying current to an active layer, wherein the...

20060140235 - External cavity surface emitting laser device having a plurality of quantum wells: A high-power surface emitting laser capable of recycling electrons and holes by inserting a tunnel junction between quantum wells is provided. The laser includes an active layer with a plurality of quantum wells and a plurality of barriers alternately sandwiched between the plurality of quantum wells wherein a tunnel junction...

20060140236 - Semiconductor laser device and optical pick-up device using the same: A semiconductor laser device includes, on a substrate: an active layer and two clad layers which sandwich the active layer; and a waveguide diverging region formed in a photonic crystal having a photonic band gap, where the waveguide diverging region diverges, in at least two directions, a waveguide region formed...

20060140237 - Apparatus and method for providing a single-mode grating-outcoupled surface emitting laser with detuned second-order outcoupler grating: An improved grating-outcoupled surface-emitting semiconductor laser architecture is provided. A second-order grating is placed between two distributed Bragg reflector gratings. The period of the second order grating is positively or negatively detuned from the distributed Bragg reflector selected optical wavelength at which the laser operates. Detuning of the second-order grating...

20060140238 - Semiconductor laser apparatus: A semiconductor laser apparatus (10) is provided and comprises a mounting substrate (6), a semiconductor laser chip (1) joined to a mounting surface (6a) of said mounting substrate (6) with solder (5), emitters (3) and non-active mesa portions (4) formed on a joining surface (1a) of said semiconductor laser chip...

20060140239 - Silicon rich nitride cmos-compatible light sources and si-based laser structures: A fabrication method produces Si compatible light-emitting materials showing sizeable optical gain by thermally annealing thin film layers of Si-rich nitride (SiNx) By utilizing the Si compatible light-emitting material, light emitting devices can be fabricated that are compatible with CMOS processes. The Si compatible light-emitting material is a high index...

20060140240 - Manganese doped upconversion luminescence nanoparticles: The present relates in general to upconversion luminescence (“UCL”) materials and methods of making and using same and more particularly, but not meant to be limiting, to Mn2+ doped semiconductor nanoparticles for use as UCL materials. The present invention also relates in general to upconversion luminescence including two-photon absorption upconversion,...

20060140241 - Laser amplifier: In a solid-state laser amplifier including at least two laser-active media in a common laser radiation field, the laser-active media do not form a hard aperture for the laser radiation field. Each of the laser-active media define a plane that is penetrated by the laser radiation field. The laser amplifier...

20060140242 - Semiconductor laser device: The invention relates to a semiconductor laser device, including a semiconductor laser element, or a number of individual lasers mounted parallel to each other, with a number of output surfaces, from which laser light can escape, having a treater divergence in a first direction (Y) than in a second direction...

20060140243 - Pulse laser resonator: A laser is disclosed which includes a gain medium, a switch element, and a pulse controller. In one embodiment laser light of differing polarizations pass along respective paths and a pulsed laser output is generated via an electro-optical element. In another embodiment light of differing polarizations passes in differing directions...

20060133431 - Diode pumped alkali vapor fiber laser: A method and apparatus is provided for producing near-diffraction-limited laser light, or amplifying near-diffraction-limited light, in diode pumped alkali vapor photonic-band-gap fiber lasers or amplifiers. Laser light is both substantially generated and propagated in an alkali gas instead of a solid, allowing the nonlinear and damage limitations of conventional solid...

20060133433 - Efficient chamber pumped fiber laser and amplifier: Chamber pumped fiber lasers and/or amplifiers are provided having a high fiber packing efficiency. Chamber pumping a fiber entails substantially surrounding a doped region of the fiber with a chamber having reflective walls. Pump radiation introduced to the chamber that is not absorbed by the fiber is reflected back toward...

20060133432 - Injection seeded, q-switched fiber ring laser: A narrow linewidth, injection seeded, Q-switched Er fiber ring oscillator, that provides over 600 μW of average output power at 500 Hz, with 1.2 μJ per pulse, before the output appears to be significantly affected by stimulated Brillouin scattering. This laser configuration provides multiple advantages in LIDAR systems because it...

20060133434 - Optical element, light emitting device and method for producing optical element: The present invention relates to an optical element for converting light of prescribed wavelength emitted from a light source into light of wavelength different from the prescribed wavelength for outputting. A first crystal part (20) and a second crystal part (21) having respective surfaces opposed to each other whose coefficients...

20060133435 - Apparatus for driving light emitting element and system for driving light emitting element: In case of driving each of light emitting parts of a surface emitting laser, each of light emitting parts is made to be in forward-bias state and switches appropriately change bias voltage, which is lower than laser oscillation threshold voltage, and drive voltages, which are not less than the laser...

20060133436 - System and method for optically powering a remote network component: Both a system and method for optically powering a network component, such as the transponder of a picocell, is provided. The system includes a vertical cavity surface emitting laser (VCSEL) for processing an input signal, a remotely-located optical power source, and an optical fiber for conducting optical power from the...

20060133438 - Laser oscillator: A laser oscillator is disclosed by means of current excitation by using a light-emitting element containing an organic matter. The present invention is a semiconductor device oscillating laser by current excitation comprising a light-emitting element having a laminated body which is formed by stacking sequentially a first layer made from...

20060133437 - Organic injection laser: An unipolar organic injection laser in which electrically-stimulated intraband transitions result in lasing. An active region includes at least one organic injector layer and at least one organic emitter layer. Each organic emitter layer has a first energy level and a second energy level on a same side of an...

20060133439 - Semiconductor laser device and optical information recording apparatus provided therewith: A semiconductor laser device that offers higher coupling efficiency to a pickup optical system by dramatically reducing the amount of difference between the shape of an FFP in the vertical direction and a Gaussian shape, and that can be produced at lower cost by reducing the operating power needed. The...

20060133440 - Optical semiconductor device: Provided is an optical semiconductor device including: an active layer having at least one quantum well layer and at least one barrier layer; a clad layer formed adjacent to the active layer; and a tunneling barrier layer formed between the active layer and the clad layer to be connected to...

20060133442 - Nitride semiconductor light-emitting device and method for fabrication thereof: An adhesion layer of a hexagonal crystal is laid on a facet an optical resonator of a nitride semiconductor laser bar having a nitride-based III-V group compound semiconductor layer, and a facet coat is laid on the adhesion layer. In this way, a structure in which the facet coat is...

20060133441 - Semiconductor laser device: An edge-emitting type 650 nm band red semiconductor laser device is provided, which includes a resonator structure having an active layer on a semiconductor substrate. A low reflection three-layer film is provided on an emitting edge face of the resonator structure and a high reflection multi-layer film is provided on...

20060133443 - Semiconductor lasers: Lasers, such as in laser structures, can include two or more semiconductor structures that are substantially identical or that include the same semiconductor material and have substantially the same geometry, such as in closely spaced dual-spot two-beam or quad-spot four-beam lasers. The lasers can also include differently structured current flow...

20060133444 - Slab laser with composite resonator and method of producing high-energy laser radiation: Slab lasers and method for producing high power coherent laser radiation of good quality. In one embodiment, a slab laser comprises a slab laser medium, an energy source configured to deliver energy to the laser medium, and first and second optical elements. The first optical element has a first reflective...

20060126672 - Method of polycrystallization, method of manufacturing polysilicon thin film transistor, and laser irradiation device therefor: A device for irradiating a laser beam onto an amorphous silicon thin film formed on a substrate. The device includes: a stage mounting the substrate; a laser oscillator for generating a laser beam; a projection lens for focusing and guiding the laser beam onto the thin film; a reflector for...

20060126673 - Optical pickup device: Provided is an optical pickup device in which the deterioration of optical characteristics of a laser light beam due to a deviation of an optical axis can be smoothly suppressed with a simple structure. An objective lens becomes a finite system for only a laser light beam for CD (780...

20060126674 - Lasers for synchronized pulse shape tailoring: A plurality of subresonators (12, 14), having different design configurations, share a common resonator section (18) such that the lasing action can be substantially synchronized to provide coherent laser pulses that merge the different respective pulse energy profile and/or pulse width characteristics imparted by the configurations of the subresonators (12,...

20060126675 - Solid-state laser device: A solid-state laser device, comprising a first optical axis and a second optical axis having a commonly used optical axis portion and separated by an optical axis separating means, a first resonator composed on the first optical axis, a second resonator composed on the second optical axis, a first light...

20060126679 - Bragg fibers in systems for the generation of high peak power light: The present invention generally concerns the use of Bragg optical fibers in chirped pulse amplification systems for the production of high-pulse-energy ultrashort optical pulses. A gas-core Bragg optical fiber waveguide can be advantageously used in such systems to stretch the duration of pulses so that they can be amplified, and/or...

20060126680 - Dual pulse-width medical laser: A laser device that includes a dual pulse-width laser-pumping circuit generates long and short laser pulses. The laser-pumping circuit employs a single power supply with dual high voltage outputs that are selectable under control of a user. The laser device conveniently generates long and short laser pulses or a mix...

20060126678 - Methods for synchronized pulse shape tailoring: A plurality of subresonators (12, 14), having different design configurations, share a common resonator section (18) such that the lasing action can be substantially synchronized to provide coherent laser pulses that merge the different respective pulse energy profile and/or pulse width characteristics imparted by the configurations of the subresonators (12,...

20060126676 - Pulse laser arrangement and method for setting pulse length for laser pulses: The object of a pulsed laser arrangement and a method for adjusting the pulse length of laser pulses is to change the pulse length over a wide range substantially independent from the laser output power, in particular to counteract a reduction in output and to prevent a negative change in...

20060126681 - Pulse modifier, lithographic apparatus, and device manufacturing method: A pulse modifying unit is provided in the illumination system of the lithographic apparatus to reduce the degradation of the expensive lens elements by billions of the high intensity ultraviolet pulses from the laser is configured to receive an input pulse of radiation along a first optical axis and further...

20060126682 - Pulsed multiple colour laser system: A pulsed multiple colour laser system is disclosed having particular application for incorporation into a digital holographic printer for producing RGB colour reflection holograms. A Nd:YLF crystal (1) in a laser cavity is excited to produce an emission at (1313) nm which is frequency converted by doubling to 656.3 nm...

20060126677 - Synchronization technique for forming a substantially stable laser output pulse profile having different wavelength peaks: A specially shaped laser pulse energy profile characterized by different laser wavelengths at different times of the profile provides reduced, controlled jitter to enable semiconductor device micromachining that achieves high quality processing and a smaller possible spot size....

20060126683 - Optical transmitter having analog/digital mixed-mode temperature compensation function: Disclosed herein is an optical transmitter having an analog/digital mixed-mode temperature compensation function. The optical transmitter, when detecting the optical output power of a laser diode, which outputs logic levels “1” and “0” as optical signals, through a monitoring photodiode, and controlling the bias current of a laser drive circuit...

20060126684 - Real time constant excitation ratio (er) laser driving circuit: Adverse effects to laser excitation ratio slope caused for example by ambient temperature maybe compensated for by adjusting drive current to the laser. The real time excitation ratio slope may be determined by dithering the code word by +/−1 least significant bit (LSB) of a digital-to-analog drive current source (DAC)....

20060126685 - Slab laser amplifier with parasitic oscillation suppression: A slab laser amplifier with parasitic oscillation suppression has a plurality of angled pump faces related to one another in order to decrease likelihood of parasitic oscillations, with internal beam incidence angles at total internal reflection that alleviate need for reflective coatings. No polished surfaces of gain material comprising the...

20060126686 - Light source unit having a light source in a mirror tunnel: A light source unit including a mirror tunnel which has a prism-like shape and of which external sides are formed to taper and a light source made up of a light emitting device which is disposed on a side of the mirror tunnel. To provide a light source unit which...

20060126688 - Blue and green laser diodes with gallium nitride or indium gallium nitride cladding laser structure: A novel indium gallium nitride laser diode is described. The laser uses indium in either the waveguide layers and/or the cladding layers. It has been found that InGaN waveguide or cladding layers enhance optical confinement with very small losses. Furthermore, the use of InGaN waveguide or cladding layers can improve...

20060126691 - Dual platform semiconductor laser device: A dual platform semiconductor laser device includes a laser chip layer, two independent platforms formed on the laser chip layer and defining a light emitting active area platform and a wire bonding platform, a planarized dielectric layer filled between the independent platforms, a protective layer disposed at the dielectric layer...

20060126687 - Method for producing a buried tunnel junction in a surface-emitting semiconductor laser: Methods for producing buried tunnel junctions in surface-emitting semi-conductor lasers and devices incorporating the buried tunnel junctions are disclosed. The laser comprises an active zone containing a pn-junction, surrounded by a first n-doped semi-conductor layer and at least one p-doped semi-conductor layer. In addition to a tunnel junction on the...

20060126692 - Semiconductor laser apparatus: A semiconductor laser apparatus includes a semiconductor laser element, a lead frame on which the semiconductor laser element is mounted, and an enclosure attached to the lead frame. When a direction in which a main beam is emitted from the semiconductor laser element is defined as forward, the lead frame...

20060126690 - Semiconductor laser apparatus capable of routing laser beams emitted from stacked-array laser diode to optical fiber with little loss: A semiconductor laser apparatus according to an exemplary embodiment of the present invention is provided. For example, the apparatus may include a single or a plurality of stacked-array laser diodes, first beam compressors, and a separating optical device separating the group of laser beams into subgroups of laser beams in...

20060126689 - Semiconductor laser diode and method of manufacturing the same: Provided are a semiconductor laser diode and a method of manufacturing the same. The semiconductor laser diode includes a lower cladding layer disposed on a substrate; a ridge including an optical waveguide layer, an active layer, an upper cladding layer, and an ohmic contact layer, which are sequentially stacked on...

20060126693 - Integrated semiconductor light source: Provided is an integrated semiconductor light source using locking characteristic by an external light injection, including: an active region controlling an optical gain and an optical output by current injection; and a passive region having a structure integrated with the active region and moving a cavity mode by current injection...

20060126694 - Hybrid metal bonded vertical cavity surface emitting laser and fabricating method thereof: Provided is a method of fabricating a vertical cavity surface emitting laser among semiconductor optical devices, comprising: bonding a dielectric mirror layer to an epi-structure having a mirror layer and an active layer; bonding these on a new substrate using a metal bonded method; removing the existing substrate; and fabricating...

20060126696 - Method for producing an oxide confined semiconductor laser: A method for producing an oxide confined semiconductor laser uses a dual platform to synchronously produce a light emitting active area and a wire bonding area on a semiconductor material and use a metal protective material, an electrically conductive metal material, and a dielectric material together with an etching process,...

20060126695 - Optical element, optical module, and optical transmission device: An optical element includes a substrate, a surface-emitting type semiconductor laser that is provided above the substrate and includes a first mirror, an active layer and a second mirror formed in this order from the substrate side, a first optical detection section formed above the substrate, a second optical detection...

20060126697 - Very narrow band, two chamber, high rep-rate gas discharge laser system: An oscillator-amplifier gas discharge laser system and method is disclosed which may comprise a first laser unit which may comprise a first discharge region which may contain an excimer or molecular fluorine lasing gas medium; a first pair of electrodes defining the first discharge region containing the lasing gas medium,...

20060126698 - Method of manufacturing an electro-active lens: A method of manufacturing an electro-active lens is disclosed. The lens is manufactured by providing a lens blank having a front and back surface, a thickness, and an index of refraction. An electro-active element is placed on one of the front or back surfaces of the lens blank. A covering...

20060126699 - Optical element, method of manufacturing same, and optical apparatus using optical element: Grating portions made of a metal are arranged as a first layer at regular intervals on a substrate, and a filling material fills the space between adjacent ones of the grating portions. Also, as a second layer, only grating portions are likewise arranged at regular intervals on the filling material....

20060114946 - Nonlinear crystal modifications for durable high-power laser wavelength conversion: A wavelength converter (34) such as a nonlinear crystal has an angle cut exit surface (36) to separate a harmonic wavelength from a fundamental or different harmonic wavelength. A solid optical overlay medium (28) has an entrance surface (38) that is angle cut to mate with the converter exit surface...

20060114947 - Solid-state laser generator: Two laser media are disposed at equal intervals between a first flat mirror, which is a resonator mirror comprising a resonator, and a second flat mirror for separating laser light that transmits second-harmonic laser light and reflects fundamental laser light toward a laser light incident plane; and a dielectric multilayer...

20060114948 - Workpiece processing system using a common imaged optical assembly to shape the spatial distributions of light energy of multiple laser beams: A workpiece processing system employs a common modular imaged optics assembly and an optional variable beam expander for optically processing multiple laser beams. In one embodiment, a laser and a fixed beam expander cooperate to produce a laser beam that propagates through a beam switching device to produce multiple laser...

20060114949 - Ultra-compact, low cost high powered laser system: A laser system that has an optical fiber and a laser diode coupled to an optical combiner. The optical fiber includes a chirped grating. The laser diode generates a laser pulse. Because of various internal effects the rear portion of the laser pulse contains light with longer wavelengths than light...

20060114950 - Laser diode module with a built-in high-frequency modulation ic: A laser diode module with a built-in high-frequency modulation IC used to remove the reflected noise generated as the laser beam reads the signal to be played back and directly packaged within a metal cap. The high-frequency modulation IC creates an electrical connection through wire bonding with several connection legs...

20060114952 - Method and apparatus for compensating for temperature characteristics of laser diode in optical communication system: A method and apparatus for compensating for temperature characteristics of a laser diode are disclosed. The laser diode may be used in a transmitter unit of a transceiver for optical signal transmission. The transceiver includes the laser diode and a monitor photodiode. In such a method, a modulation current is...

20060114951 - Thermally self-correcting gain modules and associated systems and methods: Aspects of the present invention are directed to the use of optical gain structures that include alternating layers of gain medium and transparent heat conductors in which the gain medium itself functions as a correction optic. The gain medium changes to an optimum or desired shape because of the thermal...

20060114953 - Method and system for detection of regions of instability in multi-section tunable lasers: This invention relates to a method and system to detect hysteresis/unstable regions of multi-section lasers. The method comprises the steps of obtaining a first set of measurement values for the output of the laser diode by increasing a first current through a range of values in a positive direction, increasing...

20060114954 - Highly efficient driving of photoflash diodes using low and fixed voltage drop-out current sink: A circuit according to the present invention is used for driving a photoflash diode and comprises a current sink, a feedback circuit, and a DC-DC converter. The current sink is coupled to the photoflash diode for controlling the current through the photoflash diode. The feedback circuit receives a feedback signal...

20060114955 - Spectral control of laser diode bars and stacks: The present invention provides controlling the locked wavelength of individual diodes in an array such that the spectral output of the array when taken as a whole is of the desired form for a given application. In one embodiment, a volume holographic grating is formed that has a wavelength that...

20060114956 - High power high pulse repetition rate gas discharge laser system bandwidth management: A line narrowing apparatus and method for a narrow band DUV high power high repetition rate gas discharge laser producing output laser light pulse beam pulses in bursts of pulses is disclosed, which may comprise a dispersive center wavelength selection optic contained within a line narrowing module, selecting at least...

20060114957 - Line narrowing module: A line narrowing method and module for a narrow band DUV high power high repetition rate gas discharge laser producing output laser light pulse beam pulses in bursts of pulses, the module having a nominal optical path are disclosed which may comprise: a dispersive center wavelength selection optic moveably mounted...

20060114958 - Method and apparatus for gas discharge laser bandwidth and center wavelength control: A gas discharge laser system bandwidth control mechanism and method of operation for controlling bandwidth in a laser output light pulse generated in the gas discharge laser system is disclosed which may comprise a bandwidth controller which may comprise an active bandwidth adjustment mechanism; a controller actively controlling the active...

20060114959 - Gas laser oscillator: A gas laser oscillator (10) provided with voltage detecting means (4a to 4d) for detecting the voltage of each of a plurality of discharge tube segments (6a to 6d) of a discharge tube before start of discharge and a discharge tube segment start judging means (1) for judging if each...

20060114960 - Optical feedback structures and methods of making: An optical resonator can include an optical feedback structure disposed on a substrate, and a composite including a matrix including a chromophore. The composite disposed on the substrate and in optical communication with the optical feedback structure. The chromophore can be a semiconductor nanocrystal. The resonator can provide laser emission...

20060114961 - High-gain diode-pumped laser amplifier: A laser amplifier includes a laser active slab with a source of pump power to amplify an input laser beam, the laser active slab including a block of laser active material having opposed lateral faces defining a wedge lateral dihedral angle, opposed longitudinal faces, and opposed parallel transverse faces, the...

20060114962 - Laser oscillator incorporating transverse mode rotation in the laser resonator: A laser oscillator is provided that makes it possible to stably obtain a laser beam output in continuous or pulsed oscillation that has an intensity distribution of a top-hat profile or a fundamental transverse mode profile. An optical resonator is used that maintains the polarization of a laser beam traveling...