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| Number | Title | Issue Date |
| 8130800 | Mode-locked solid state lasers using diode laser excitation A mode-locked laser employs a coupled-polarization scheme for efficient longitudinal pumping by reshaped laser diode bars. One or more dielectric polarizers are configured to reflect a pumping wavelength having a first polarization and to reflect a lasing wavelength... | 03/06/2012 |
| 8036253 | Resonant Fabry-Perot semiconductor saturable absorbers and two photon absorption power limiters An intracavity resonant Fabry-Perot saturable absorber (R-FPSA) induces modelocking in a laser such as a fiber laser. An optical limiter such as a two photon absorber (TPA) can be used in conjunction with the R-FPSA, so that Q-switching is inhibited, resulting in la... | 10/11/2011 |
| 7729393 | Surface emitting laser with an integrated absorber A surface emitting laser (SEL) with an integrated absorber. A lower mirror and an output coupler define a laser cavity of the SEL. A monolithic gain structure positioned in the laser cavity includes a gain region and an absorber, wherein a saturation fluence of the ... | 06/01/2010 |
| 7711015 | Method for controlling operation of light emitting transistors and laser transistors A method for controlling operation of a transistor includes the following steps: providing a bipolar transistor having emitter, base and collector regions; applying electrical signals to the transistor to produce light emission from the transistor; effecting photon-... | 05/04/2010 |
| 7558299 | Semiconductor saturable absorber and fabrication method thereof A semiconductor saturable absorber and the fabrication method thereof are provided. The semiconductor saturable absorber includes a Fe-doped InP substrate, a periodic unit comprising an AlGaInAs QW formed on the Fe-doped InP substrate and an InAlAs barrier layer for... | 07/07/2009 |
| 7397828 | Laser system with multiple wavelength diode pump head and associated method A laser system comprises a reflective chamber capable of housing a laser medium and at least two laser diodes emitting light at different respective wavelengths into the reflective chamber. The wavelength of each respective laser diode may be selected to minimize fl... | 07/08/2008 |
| 7391794 | Injection seeding of frequency-converted Q-switched laser A non-linearly frequency-converted Q-switched laser is “injection seeded” with short pulses from another laser, called a seed laser. Radiation produced by the Q-switched laser is frequency converted in a non-linear process. The injection seeding can enhance peak... | 06/24/2008 |
| 7376354 | All optical clock recovery All optical clock recovery includes a transmitter for generating an optical timing signal. The transmitter includes a semiconductor laser for the production of a dynamically synchronizable timing signal, the laser having an external resonator for feedback of the tim... | 05/20/2008 |
| 7358159 | Method for manufacturing ZnTe compound semiconductor single crystal ZnTe compound semiconductor single crystal, and semiconductor device The present invention relates to a method for producing an n-type ZnTe system compound semiconductor single crystal having high carrier concentration and low resistivity, the ZnTe system compound semiconductor single crystal, and a semiconductor device produced by u... | 04/15/2008 |
| 7356053 | Mode-locked laser with variable pulse duration A pulsed, mode-locked, picosecond laser having a solid-state laser medium, a saturable absorber (SA), and a passive negative feedback (PNF) element. The SA is “slow,” having an absorption recovery time which is longer than a desired duration of an output pulse. ... | 04/08/2008 |
| 7339975 | Apparatus for synthesizing laser beams (Problem to be solved) To provide a laser beam synthesizing apparatus which is small in size and high in output power. (Means for solving the problem) A convergent angle transforming optical system 30 is disposed further upstream of the upstream-most p... | 03/04/2008 |
| 7336690 | Solid-state laser system A simple and high-reliability constitution provides a solid-state laser system that allows a high-output, long-pulse-width laser beam to be obtained. A solid-state laser system that includes a solid-state laser medium 1, a light source 2 for pum... | 02/26/2008 |
| 7324568 | Modulated saturable absorber controlled laser A modulated saturable absorber controlled laser. The laser includes an active medium; a saturable absorber material operationally coupled to the medium to serve as a passive Q switch; and an energy source disposed external to the medium for apply energy to the absor... | 01/29/2008 |
| 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 |
| 7294863 | Micro-lens built-in vertical cavity surface emitting laser A micro-lens built-in vertical cavity surface emitting laser (VCSEL) includes a substrate and a lower reflector formed on the substrate. An active layer is formed on the lower reflector, generating light by a recombination of electrons and holes. An upper reflector ... | 11/13/2007 |
| 7286241 | System and method for high-speed laser detection of ultrasound A system and method for laser light amplification provides amplification of a laser light beam emitted from a laser light source as low-amplification seed laser light signal. The low-amplification seed laser light signal is transmitted to an amplification component.... | 10/23/2007 |
| 7282666 | Method and apparatus to increase throughput of processing using pulsed radiation sources A material processing system and method is disclosed for processing materials such as amorphous silicon in an annealing processes and lithography processes on a silicon wafer, as well as ablation processes. A first laser generates periodic pulses of radiation along ... | 10/16/2007 |
| 7251265 | Micro-cavity laser having increased sensitivity An optically pumped micro-cavity laser has an optical gain cavity and an optical resonant cavity. The optical gain cavity has a gain medium disposed that generates an optical output in response to an optical pump signal. The optical resonant cavity has an electro-op... | 07/31/2007 |
| 7224707 | Suppression of mode-beating noise in a Q-switched pulsed laser using novel Q-switch device and applications A novel Q-switch device enables significant quality and value improvement for a Q-switched laser system by achieving a significant reduction of mode-beating noise during the pulsed output. The origin of mode-beating noise in a Q-switched laser is a result of high ga... | 05/29/2007 |
| 7217585 | Method for fabricating and using a light waveguide A waveguide is fabricated by first preparing two waveguide precursor pieces. Each waveguide precursor piece includes a single-crystal substrate, and an epitaxial coating layer of an oxide coating material on the substrate. The oxide substrate material preferably com... | 05/15/2007 |
| 7215491 | Optical path switching device and method An optical path switching method includes converging and irradiating, on a light absorption layer film provided in a thermal lens forming element including at least the film, each of a control light having a wavelength selected from a wavelength band which is absorb... | 05/08/2007 |
| 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 |
| 7203209 | System and method for a passively Q-switched, resonantly pumped, erbium-doped crystalline laser The laser includes a resonant cavity formed between a first mirror and a second mirror. An unsensitized Erbium-doped crystal gain medium for producing laser gain is disposed within the resonant cavity. A saturable absorber is disposed within the resonant cavity. A p... | 04/10/2007 |
| 7154929 | Micro-cavity light emitting device and method for making same A device for emission of light is made including an emitting structure including an active part and a micro-cavity, delimited by mirrors and containing the active part, and a laser diode designed for pumping the emitting structure. The emitting structure is fixed to... | 12/26/2006 |
| 7149231 | Monolithic, side-pumped, passively Q-switched solid-state laser A monolithic, side pumped, passively Q-switched, solid-state laser (10) includes a laser resonator structure (16) that includes a laser gain medium (12) having an output face bonded to a passive Q-switch (14). The gain medium (12) ... | 12/12/2006 |
| 7103282 | All optical clock recovery All optical clock recovery includes a transmitter for generating an optical timing signal. The transmitter includes a semiconductor laser for the production of a dynamically synchronizable timing signal, the laser having an external resonator for feedback of the tim... | 09/05/2006 |
| 7103076 | Ultrashort pulsed laser and optical head using the same An ultrashort pulsed laser device includes: a pump laser diode having linear polarization; a solid laser medium oscillating with linear polarization; an optical fiber maintaining a polarization direction; and a saturable absorber mirror. The solid laser medium is di... | 09/05/2006 |
| 7088756 | Polarization maintaining dispersion controlled fiber laser source of ultrashort pulses A modelocked linear fiber laser cavity with enhanced pulse-width control includes concatenated sections of both polarization-maintaining and non-polarization-maintaining fibers. Apodized fiber Bragg gratings and integrated fiber polarizers are included in the cavity... | 08/08/2006 |
| 7087447 | Method for fabricating zig-zag slabs for solid state lasers A method for batch manufacturing of slabs for zig-zag lasers including steps of bonding two non-active media to either side of an active medium to form a sandwich, dicing the sandwich to provide slices, rendering two surfaces of each slice into total-internal-reflec... | 08/08/2006 |
| 7082149 | High power diode side pumped solid state laser A high pulse energy, side pumped laser is provided. The laser has an optical cavity formed between a first and a second reflective surface. A lasing medium is located within the cavity along its optical axis. A plurality of diode bars are provided in optical communi... | 07/25/2006 |
| 7065121 | Waveguide architecture, waveguide devices for laser processing and beam control, and laser processing applications Methods and systems for laser-based processing of materials are disclosed wherein a scalable laser architecture, based on planar waveguide technology, provides for pulsed laser micromachining applications while supporting higher average power applications like laser... | 06/20/2006 |
| 7058093 | Q-switched, cavity dumped laser systems for material processing This disclosure discusses techniques for obtaining wavelength selected simultaneously super pulsed Q-switched and cavity dumped laser pulses utilizing high optical damage threshold electro-optic modulators, maintaining a zero DC voltage bias on the CdTe electro-opti... | 06/06/2006 |
| 7046711 | High power and high gain saturation diode pumped laser means and diode array pumping device A diode pumped solid state laser for producing a high aspect ratio beam comprises a diode pumping array (1) on a diode array mount (3) and optical means for imaging a pump light beam onto a substantially asymmetrical spot with a smooth intensity profil... | 05/16/2006 |
| 7039079 | Pulsed COlaser including an optical damage resistant electro-optical switching arrangement A laser includes a gain medium located in a laser resonator. The gain medium generates plane polarized radiation plane polarized in a first polarization orientation. An electro-optical switch is located in the resonator. When the switch is activated the polarization... | 05/02/2006 |
| 7030996 | Measurement of complex surface shapes using a spherical wavefront Conical surfaces (and other complex surface shapes) can be interferometrically characterized using a locally spherical measurement wavefront (e.g., spherical and aspherical wavefronts). In particular, complex surface shapes are measured relative to a measurement poi... | 04/18/2006 |
| 7027471 | Fast wavelength-tunable laser system using Fabry-Perot laser diode The invention relates to a laser system using a multi-longitudinal-mode Fabry-Perot laser diode as an inter-injection light source and a gain cavity formed by other laser diodes of such type so as to achieve the function of fast wavelength switching, so that it is p... | 04/11/2006 |
| 7027479 | Volume absorbing laser beam dump A volume-absorbing laser beam dump encloses a solution comprising a laser-absorbing solute diluted in a solvent that is non-absorbent of the laser energy. The laser beam dump includes a window to admit a laser beam into the solution. As the laser beam travels throug... | 04/11/2006 |
| 7022539 | Vertical-cavity, surface-emission type laser diode and fabrication process thereof A vertical-cavity, surface-emission-type laser diode includes an optical cavity formed of an active region sandwiched by upper and lower reflectors, wherein the lower reflector is formed of a distributed Bragg reflector and a non-optical recombination elimination la... | 04/04/2006 |
| 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 |
| 7006537 | Single polarization fiber laser A method and apparatus for generating single polarization fiber laser output are disclosed. A Bragg grating is non-destructively fabricated within the fiber to introduce differential loss between the two polarizations of the laser output. Curvature at the grating si... | 02/28/2006 |
