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| Number | Title | Issue Date |
| 7773658 | Unstable optical resonator and laser device An unstable optical resonator for an optically active medium comprising a spherical back mirror and a spherical outcoupling mirror is proposed, and an outcoupling which is asymmetrical in relation to the optical axis takes place therein. ... | 08/10/2010 |
| 7756186 | Unstable resonator with variable output coupling Through the use of a relatively inexpensive third mirror on a novel folded hybrid unstable resonator configuration, the optimum output coupling for a given laser design can be explored quickly and easily with a minimum of intracavity mirror alignment. No changes in ... | 07/13/2010 |
| 7469002 | Mid-infrared optically pumped unstable resonator laser A high-powered mid-IR antimonide-based unstable resonator semiconductor laser that is optically pumped. One Fabry-Perot facet is a mechanically polished cylindrical mirror that extends well into the GaSb substrate. The waveguide is designed to weakly confine the tra... | 12/23/2008 |
| 7463666 | Laser with hybrid-unstable ring resonator A unidirectional ring laser oscillator has a travelling wave unstable mode in one transverse dimension and either a waveguide or freespace Gaussian mode in the orthogonal transverse dimension for coupling to large volumes of asymmetric cross section laser gain media... | 12/09/2008 |
| 7440643 | Variable light controlling device and variable light controlling method A variable light controlling device comprising a substrate, an optical waveguide disposed on the substrate, a first heater and a second heater to change the optical waveguide's temperature is fabricated. And a total amount of the power supplied to the first and the ... | 10/21/2008 |
| 7415057 | Unstable optical resonator and laser device An unstable optical resonator for an optically active medium comprising a spherical back mirror and a spherical outcoupling mirror is proposed, and an outcoupling which is asymmetrical in relation to the optical axis takes place therein. ... | 08/19/2008 |
| 7369597 | Laser output light pulse stretcher Providing a high peak power short pulse duration gas discharge laser output pulse comprises a pulse stretcher a laser output pulse optical delay initiating optic diverting a portion of the output laser pulse into an optical delay having an optical delay path and com... | 05/06/2008 |
| 7365349 | EUV light source collector lifetime improvements An apparatus and method for cleaning a plasma source material compound from a plasma produced EUV light source collector optic which may comprise reacting the plasma source material compound with hydrogen to form a hydride of the plasma source material from the plas... | 04/29/2008 |
| 7327772 | Optical resonator with mirror structure suppressing higher order transverse modes An optical resonator including is designed is to degrade the ability of the resonator to support suppress higher order transverse spatial modes. The inventive optical resonator forces Higher higher order transverse modes to be fundamentally unstable in the inventive... | 02/05/2008 |
| 7327773 | Short-pulse laser device with a preferably passive mode coupling and multiple reflection telescope therefor The invention relates to a short-pulse laser device (11) with a preferably passive mode coupling. Said device comprises a resonator (12) which contains a laser crystal (14) in addition to several mirrors (M1-M7, OC) that define a l... | 02/05/2008 |
| 7317179 | Systems and methods to shape laser light as a homogeneous line beam for interaction with a film deposited on a substrate Systems and methods are disclosed for shaping and homogenizing a laser beam for interaction with a film. The shaping and homogenizing system may include a lens array and a lens that is positioned to receive laser light from the lens array and produce a respective el... | 01/08/2008 |
| 7315562 | Stable/unstable optical cavity resonator for laser An improved resonator and optical cavity is adapted for use with a chemical laser that has a nozzle upstream of the resonator that emits a gain medium in a flow direction, and a pressure-recovery system downstream of the resonator. The optical resonator comprises fi... | 01/01/2008 |
| 7310359 | 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 ... | 12/18/2007 |
| 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 |
| 7280578 | Near-field light source device, and optical head, optical device, exposure apparatus and microscope device having such a near-field light source device A near-field light source device including a semiconductor laser comprised of laminated semiconductor layers and having a ring-type optical resonator with a plurality of wave guides connected via mirror portions, a light blocking film formed in one of the mirror por... | 10/09/2007 |
| 7274722 | COslab laser CO2 slab laser having a gas-filled tubular housing, sealed off at both ends by end pieces, which accommodates two overlapping electrodes extending into the tubular housing and mirrors arranged in the region of the electrodes, where each of the two end pie... | 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 |
| 7263116 | Dielectric coupled COslab laser A slab laser includes two elongated electrodes arranged spaced apart and face-to-face. Either one or two slabs of a solid dielectric material extend along the length of the electrodes between the electrodes. A discharge gap is formed either between one of the electr... | 08/28/2007 |
| 7260134 | Dielectric coupled COslab laser An slab CO2 laser includes spaced-apart elongated slab electrodes. A lasing gas fills a discharge gap between the electrodes. An RF power supply is connected across the electrodes and sustains an electrical discharge in the lasing gas in the discharge gap. Either on... | 08/21/2007 |
| 7242705 | Grating-outcoupled cavity resonator having uni-directional emission A grating-outcoupled microcavity disk resonator has whispering gallery modes existing in a nearly circular resonator. Light is outcoupled by providing a grating region in the plane of the grating-outcoupled microcavity disk resonator. The grating region provides an ... | 07/10/2007 |
| 7220256 | Laser system and method for treatment of biological tissues A system for and method of performing laser assisted surgery is disclosed. Laser radiation is preferably delivered to a target area of tissue using a Er:YAG laser source. The laser radiation is delivered to the target area in bursts of laser radiation comprising set... | 05/22/2007 |
| 7217941 | Systems and methods for deflecting plasma-generated ions to prevent the ions from reaching an internal component of an EUV light source A system is disclosed for protecting an internal EUV light source component from ions generated at a plasma formation site. In one aspect, the system may comprise a plurality of foil plates and an arrangement for generating a magnetic field to deflect ions into one ... | 05/15/2007 |
| 7203216 | Timing control for two-chamber gas discharge laser system Feedback timing control equipment and process for an injection seeded modular gas discharge laser. A preferred embodiment is a system capable of producing high quality pulsed laser beams at pulse rates of about 4,000 Hz or greater and at pulse energies of about 5 to... | 04/10/2007 |
| 7198738 | Cesium-lithium-borate crystal and its application to frequency conversion of laser light The present invention provides a cesium-lithium-borate crystal, which can be used as a high-performance wavelength converting crystal, having a chemical composition expressed as CsLiB6O10, and substituted cesium-lithium-borate crystals expressed by the following for... | 04/03/2007 |
| 7180083 | EUV light source collector erosion mitigation An EUV light source collector erosion mitigation system and method is disclosed which may comprise a collector comprising a multilayered mirror collector comprising a collector outer surface composed of a capping material subject to removal due to a removing interac... | 02/20/2007 |
| 7173950 | Low-noise high-power SHG laser system A second harmonic generation laser system comprising: a non-linear frequency converting medium; and an external cavity pump laser that produces optical energy at a single mode and at a single frequency and that is disposed to provide the optical energy to the non-li... | 02/06/2007 |
| 7141806 | EUV light source collector erosion mitigation An EUV light source collector erosion mitigation method and apparatus for a collector comprising a multilayered mirror collector comprising a collector outer surface composed of a capping material subject to removal due to a removing interaction with materials creat... | 11/28/2006 |
| 7139115 | Athermalization of an optical parametric oscillator A method for thermally stabilizing an optical parametric oscillator (OPO) 10 to maintain constant optical path length for stable high power output places a beam dump 32 outside an OPO cavity 18. The OPO 10 has a nonlinear crystal 22 | 11/21/2006 |
| 7130321 | Intracavity frequency-tripled CW laser with traveling-wave ring-resonator A traveling-wave ring laser resonator includes one or more gain-elements for generating fundamental radiation and three optically nonlinear crystals. A portion of the fundamental radiation is converted to second-harmonic radiation in a first of the crystals. Remaini... | 10/31/2006 |
| 7126974 | Ring geometry diode laser arrays and methods Systems, configurations and methods of using laser diodes in ring-shaped arrays placed a distance away from thin disk solid-state laser gain media, which provide uniformly absorbed pump power distribution with high absorption efficiency. This results in major improv... | 10/24/2006 |
| 7088745 | Laser system with external optical feedback and use of such system in the graphical industry A diode laser system providing a high-power laser beam with good spatial coherence, which can be focused to a small spot size over long distances and which has a good pointing stability. The laser system comprises a laser diode (301) adapted to emit a first l... | 08/08/2006 |
| 7085303 | Laser with combined lens and birefringence compensator A laser includes a chamber having a front mirror and a back mirror defining a optical propagation path. An optical gain medium such as a solid state disk, rod or slab is located between the front and back mirrors within the chamber to produce a laser light along the... | 08/01/2006 |
| 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 |
| 7063524 | Apparatus for increased dimensional accuracy of 3-D object creation A stereolithographic (STL) apparatus for forming structures such as semiconductor die packages is described which uses a laser beam focused to a generally annular “spot” having an annulus of enhanced laser power surrounding a central “hole” of reduced (or no... | 06/20/2006 |
| 7062125 | Prismatic reflection optical waveguide device A prismatic reflection optical waveguide device having an input and an output optical waveguide segments and a reflection interface provided therebetween apt to convey a light beam from one direction to another, wherein the light beam is conveyed by a single reflect... | 06/13/2006 |
| 7061947 | Partially mirrored beam tap for wavelength lockers A partially mirrored beam tap for use in wavelength and power monitoring, wherein the partially mirrored beam tap splits off at least two beams from an elliptical Gaussian output beam, wherein a first split-off beam is transmitted to an etalon and one or more first ... | 06/13/2006 |
| 7061957 | External cavity laser having a set atmosphere An external cavity laser having a set atmosphere is disclosed. In an embodiment, the laser system includes a gain medium to emit light in response to an applied current, a wavelength selective reflector configured to resonate the light that is emitted from the gain ... | 06/13/2006 |
| 7050476 | Waveguide laser resonator The invention relates to a new configuration for a laser resonator for use in combination with a solid-state laser gain medium contained within the core of a planar waveguide. The resonator has a substantially confocal negative branch unstable resonator configuratio... | 05/23/2006 |
| 7027477 | Expansion matched thin disk laser and method for cooling An optical system includes a diode pump source and a thin disk gain media. The thin disk gain media has first and second surfaces and is made of a material with an anisotropic thermal expansion. At least one of the first and second surfaces is a cooling surface. The... | 04/11/2006 |
| 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 |
