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| Number | Title | Issue Date |
| 7907656 | Harmonic frequency conversion module A harmonic frequency conversion module is disclosed including a polarization maintaining (PM) fiber optical link for providing an output stabilized from power fluctuation by the inclusion of one or more polarizers in the PM fiber optical link. Removing polarization ... | 03/15/2011 |
| 7369583 | Electrooptically wavelength-tunable resonant cavity optoelectronic device for high-speed data transfer A device contains at least one wavelength-tunable element controlled by an applied voltage and at least two resonant cavities, where the resonant wavelength of the tunable element is preferably elecrooptically tuned using the quantum confined Stark effect around the... | 05/06/2008 |
| 7339970 | Surface light emitting element, optical module, light transmission device To provide a surface light emitting element capable of maintaining characteristics of the surface light emitting element and accurately detecting emitted light. A surface light emitting element includes a light emitting element part, provided on a semiconductor subs... | 03/04/2008 |
| 7319708 | Variable pulse repetition frequency passively Q-switched laser A passive Q-switch element is disclosed that permits operating a laser with a variable pulse repetition frequency (PRF). The Q-switch comprises two wedges of material, one made from saturable absorber material, the other from transparent material, with the two wedge... | 01/15/2008 |
| 7310125 | Reflective liquid crystal display A reflective liquid crystal display includes a linear polarizer for converting natural light into linearly polarized light; a retardation film for converting the linearly polarized light into circularly polarized light; a liquid crystal layer for varying the phase o... | 12/18/2007 |
| 7301981 | 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 puls... | 11/27/2007 |
| 7295591 | Long-pulse pulse power system for gas discharge laser A long pulse pulse power system for gas discharge lasers. The system includes a sustainer capacitor for accepting a charge from a high voltage pulse power source. A peaking capacitor with a capacitance value of less than half the sustainer capacitance provides the h... | 11/13/2007 |
| 7289549 | 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 puls... | 10/30/2007 |
| 7282729 | Fabry-Perot resonator apparatus and method for observing low reflectivity surfaces A Fabry-Perot resonator apparatus and method for observing low reflectivity surfaces provides functional improvements for optical inspection and measurement systems, optical storage and retrieval systems as well as other optical systems when the a surface of interes... | 10/16/2007 |
| 7277641 | Multiple access space communications optical system using a common telescope aperture The present invention relates to a multiple access space laser communications optical system. According to the present invention, multiple optical signals containing a number of channels are simultaneously received and demultiplexed at a multiple access communicatio... | 10/02/2007 |
| 7274723 | Method for amplifying a solid-state laser Conventionally, a laser beam is amplified by making a single pass through an amplifier but the laser beam emitted from the oscillator generally has low energy, so the energy stored in the amplifier cannot be fully extracted and only low laser output power and overal... | 09/25/2007 |
| 7266137 | Laser gas replenishment method Output beam parameters of a gas discharge laser are stabilized by maintaining a molecular fluorine component at a predetermined partial pressure using a gas supply unit and a processor. The molecular fluorine is subject to depletion within the discharge chamber. Gas... | 09/04/2007 |
| 7257142 | Semi-integrated designs for external cavity tunable lasers Semi-integrated external cavity diode laser (ECDL) designs including integrated structures comprising a gain section, phase control section, and optional modulator section. Each integrated structure includes a waveguide that passes through each of the sections. A mi... | 08/14/2007 |
| 7242697 | Wavelength selection device, wavelength selection laser, and tunable laser A wavelength selection filter, a wavelenth selection laser, and a tunable laser for suppressing adverse effects of non-selected light when selected light is obtained by the wavelength selection filter. A linear polarizer is arranged on a side of the wavelength selec... | 07/10/2007 |
| 7242476 | Alignment measuring system and method of determining alignment in a photolithography process An alignment measuring system includes a focusing diode, a light source, an image sensor, first and second splitters, and a controller. The first splitter directs a portion of light from the light source toward a wafer, and directs light returned by the wafer to the... | 07/10/2007 |
| 7236504 | Stretched-pulse Raman fiber lasers and methods of operating the same A method of operating a stretched-pulse Raman fiber laser includes producing laser radiation gain in a laser cavity using predominantly Raman amplification. Such a stretched-pulse Raman fiber laser has a laser cavity that includes a Negative Group Velocity Dispersio... | 06/26/2007 |
| 7227881 | Master oscillator—power amplifier excimer laser system A Master Oscillator (MO)—Power Amplifier (PA) configuration (MOPA) can be used advantageously in an excimer laser system for micro-lithography applications, where semiconductor manufacturers demand powers of 40 W or more in order to support the throughput requirem... | 06/05/2007 |
| 7202751 | 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 h... | 04/10/2007 |
| 7187702 | Surface-emitting light emitting device, manufacturing method for the same, optical module, and optical transmission apparatus To provide a surface-emitting light emitting device including an optical member whose mounting position, form, and size have been favorably controlled, and a method of manufacturing the same, as well as an optical module and an optical transmission apparatus that in... | 03/06/2007 |
| 7170921 | Magneto-optic variable optical attenuator A magneto-optic variable optical attenuator is provided that is used to control the intensity of a light signal. The optical attenuator includes at least one polarizing element having an optical polarization axis, wherein the polarizing element transmits a portion o... | 01/30/2007 |
| 7170920 | Laser device A laser device capable of efficiently oscillating laser light and always obtaining a stable beam form is provided. For this purpose, in the laser device including an amplifying section (18) in which a laser medium is amplified to oscillate laser light (11 | 01/30/2007 |
| 7130120 | Prism, projection and optical component An apparatus for transmitting or reflecting incident light. The apparatus includes a pair of diffraction grid substrates; a substantially grid-shaped diffraction grid formed of metal, wherein the diffraction grid is disposed between the substrates; and a pair of adh... | 10/31/2006 |
| 7123634 | Zig-zag laser amplifier with polarization controlled reflectors A solid state zig-zag slab laser amplifier in which depolarization occurring at total internal reflection from opposed lateral faces of the amplifier slab is controlled by selecting a complex evanescent coating that provides a selected phase retardance that results ... | 10/17/2006 |
| 7113336 | Microlens including wire-grid polarizer and methods of manufacture Microlenses including wire-grid polarizers and methods for their manufacture are disclosed. The method involves forming wire-grid polarizer patterns on a surface of the microlens. The devices and methods provide simple and economical microlenses with polarizers.... | 09/26/2006 |
| 7106771 | Semiconductor laser device and optical pickup device A semiconductor laser device has a semiconductor laser and a polarizing diffraction grating that is arranged ahead of the semiconductor laser. A reflected light from an optical recording medium is diffracted by the polarizing diffraction grating according to the pol... | 09/12/2006 |
| 7082145 | 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 embodi... | 07/25/2006 |
| 7075963 | Tunable laser with stabilized grating A line-narrowing module for a laser includes a prism beam expander and a grating preferably attached to a heat sink. A pressure-controlled enclosure filled with an inert gas seals the grating and/or other elements of the line-narrowing module. The pressure in the en... | 07/11/2006 |
| 7050178 | Method and apparatus for increasing signal to noise ratio in a photoacoustic film thickness measurement system An apparatus for improving the signal to noise ratio of measurements of the thickness of layers in a thin film stack uses a photoacoustic measurement system that includes a time differentiation system for inducing a delay in pump beam pulses. The time differentiatio... | 05/23/2006 |
| 7031352 | 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 embodi... | 04/18/2006 |
| 7019902 | Beam forming telescope with polarization correction An optical system for reforming a laser beam with azimuthal polarization having X and Y components into a beam with linear polarization has a multiplicity of optical elements, at least one of which has a mirror having an absorbing thin film reflective coating to rem... | 03/28/2006 |
| 7016128 | Method of making a high reflectivity micro mirror and a micro mirror A method of making a high reflectivity micro mirror. A first step involves providing a monolithic bulk crystal silicon having an anisotropic body with a crystalline plane. A second step involves applying chemical agents to selectively remove a portion of the body ov... | 03/21/2006 |
| 7006541 | Absolute wavelength calibration of lithography laser using multiple element or tandem see through hollow cathode lamp A tunable laser system includes a gain medium and an optical resonator for generating a laser beam, and a spectral narrowing and tuning unit within the resonator. A detection and control unit controls a relative wavelength of the laser system. A wavelength calibrati... | 02/28/2006 |
| 6998620 | Stable energy detector for extreme ultraviolet radiation detection A detector for use with an EUV photon source emitting around 11-15 nm includes at least one multilayer mirror for reflecting the beam along an optical path include a detector element, a filter for reducing the bandwidth of the beam, and the detector element. The det... | 02/14/2006 |
| 6996136 | Ultrashort-pulse fiber laser with a dispersion-managed cavity The ultrashort fiber laser with a dispersion-managed cavity. The laser is an actively mode-locked sigma laser, typically locked at a repetition rate of 10 GHz, driven by an external frequency source and actively length stabilized, and nearly 10,000 pulses circulate ... | 02/07/2006 |
| 6993058 | Coherent population trapping detector A CPT detector and a method for detecting CPT are disclosed. The CPT detector includes a quantum absorber, a polarization analyzer, and a detector. The quantum absorber includes a material having first and second low energy states coupled to a common high energy sta... | 01/31/2006 |
| 6993059 | Apparatus for reducing spacing of beams delivered by stacked diode-laser bars Apparatus for reducing spacing between a plurality of parallel, spaced apart plane-polarized laser-radiation beams delivered by a stack of laser-diode bars includes a ninety degree polarization rotator, and a compound prism including a total reflecting surface an in... | 01/31/2006 |
| 6987786 | Controlling laser polarization A laser polarization control apparatus includes a polarization modifying device, such as a liquid crystal variable retarder, and a controller. The polarization modifying device receives a laser beam and modifies the polarization of the laser beam. The controller, wh... | 01/17/2006 |
| 6963598 | System and method for VCSEL polarization control A system and method for VCSEL (vertical cavity surface emitting laser) polarization control is disclosed, including methods and apparatus comprising a component package (302, 304) having self-aligning features (316, 318), for indicating an alignment ax... | 11/08/2005 |
| 6949844 | High-speed precision positioning apparatus A high-speed precision positioning apparatus has a stage supported by a platen. The stage is driven by a plurality of drive motors that are co-planar with the stage and arranged symmetrically around the stage. The drive motors apply drive forces directly to the stag... | 09/27/2005 |
| 6941259 | Laser software control system A first software program for simulating an operating laser system controls a processor that generates one or more dummy parameters each corresponding to a parameter of an operating laser system. The dummy parameter is read over a same or similar signal interface as ... | 09/06/2005 |
