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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7023886 | Wavelength tunable optical components Embodiments of a wavelength tunable optical coupler, integrated optical components, and lasers are disclosed. The tunable optical coupler, the integrated optical components, and the lasers include thermo-optic organic material that has an index of refraction which c... | 04/04/2006 |
| 6937628 | Optical transmitter modules A subject of the invention is to reduce the temperature dependence of an etalon as a wavelength locker for a semiconductor laser device and so forth. Concretely, it is to restrict the lowering of the wavelength locking performance of the etalon dependent on the temp... | 08/30/2005 |
| 6914929 | Radiation-hardened RLG readout A diffractive optical element is interposed between the exit beams from a ring laser gyro readout and the photodetectors for detecting such beams. The diffractive optical element permits the use of photodetectors much reduced in size in order to minimize gyro perfor... | 07/05/2005 |
| 6914918 | Optical device, laser beam source, laser apparatus and method of producing optical device After forming domain inverted layers 3 in an LiTaO3 substrate 1, an optical waveguide is formed. By performing low-temperature annealing for the optical wavelength conversion element thus formed, a stable proton exchange layer 8 is fo... | 07/05/2005 |
| 6898216 | Reduction of laser speckle in photolithography by controlled disruption of spatial coherence of laser beam Speckle of a laser beam is reduced by inserting an anti-speckle apparatus in the beam path to disrupt its spatial coherence while maintaining its temporal coherence. In one embodiment, the anti-speckle apparatus is a phase retarder plate bearing periodic optically-c... | 05/24/2005 |
| 6898231 | Off-peak optical pumping of yttrium orthovanadate A laser includes an Nd:YVO4 crystal end-pumped with diode-laser light having a wavelength at which the absorption coefficient for Nd:YVO4 is less than about 0.35 (35%) of the absorption coefficient at 808 nm. ... | 05/24/2005 |
| 6839365 | Light wavelength converting system A light wavelength converting element which can reduce an amount of light fed-back to a semiconductor laser. The light wavelength converting element converts a wavelength of a fundamental wave which enters from a first end surface side of an optical waveguide to the... | 01/04/2005 |
| 6829262 | Aging in tunable semiconductor lasers A process evaluates an aging property of a distributed Bragg reflector (DBR) laser. The process includes illuminating a Bragg grating of the distributed Bragg reflector (DBR) laser with light while the DBR laser is both supplied a tuning current and not lasing. The ... | 12/07/2004 |
| 6829280 | Device and a method for the generation of coherent x-ray radiation A device (10) for producing high frequency radiation using a source of elliptically polarized radiation is disclosed based on: irradiating a frequency multiplication medium having a screw axis (16) symmetry of approximate Nth order symmetry, oriented s... | 12/07/2004 |
| 6826209 | Ultrabroad-band variable-wavelength wavelength-multiplexed pulse waveform shaping device An ultra-broadband, variable and multiple wavelength, waveform shaping apparatus is disclosed that excels with the ability to yield light pulses shaped in waveform, variable and multiple in wavelength over an ultra-broad bandwidth, the pulses being as short as in th... | 11/30/2004 |
| 6822982 | Device and method for providing a tunable semiconductor laser A semiconductor laser device including a light reflecting facet positioned on a first side of the semiconductor device, a light emitting facet positioned on a second side of the semiconductor device thereby forming a resonator between the light reflecting facet and ... | 11/23/2004 |
| 6822986 | Method of controlling a wavelength of a semiconductor laser, optical module, optical transmitter, WDM optical transmission apparatus, and method of controlling a wavelength of an optical module An optical module includes a light-emitting device that outputs laser light, a temperature detection unit that is arranged in proximity to the light-emitting device and detects the temperature of the light-emitting device, a wavelength monitor unit that receives las... | 11/23/2004 |
| 6816533 | Laser oscillator A laser oscillator comprises a laser medium, an optical excitation laser diode that irradiates the laser medium with light, a polarizer disposed on an optical path of the laser medium at a first end thereof, a first Porro prism disposed with the optical path coincid... | 11/09/2004 |
| 6816516 | Error signal generation system An error signal generation system and method for continuous and accurate positioning of a tunable element used in association with a coherent light source. A tunable element is positioned in a coherent light beam with a fixed frequency or wavelength, and a detector ... | 11/09/2004 |
| 6801559 | Group III nitride compound semiconductor laser A semiconductor laser comprises a sapphire substrate, an AlN buffer layer, Si-doped GaN n-layer, Si-doped Al0.1Ga0.9N n-cladding layer, Si-doped GaN n-guide layer, an active layer having multiple quantum well (MQW) structure in which about 35 â... | 10/05/2004 |
| 6798814 | Gas discharge laser, method of operating a gas discharge laser, and use of a sintered filter The invention relates to a gas discharge laser including a discharge tube (1), in which a gas is present and which has at least one aperture (19) through which a laser beam emerges or at which a laser beam is reflected. For withdrawing a partial amount... | 09/28/2004 |
| 6798799 | Wavelength locked integrated optical source structure using multiple microcavity A wavelength-locked, integrated optical signal source structure using a semiconductor laser device is disclosed. The optical source structure has a semiconductor laser formed on a semiconductor substrate, and an etched portion coupled with an output end of the semic... | 09/28/2004 |
| 6798820 | Adjusting device for a multi-beam source unit and image forming apparatus An adjusting device for a multi-beam source unit includes a mounting bracket, a base member rotatably mounted on the mounting bracket and a multi-beam laser diode provided with light emitting points positioned substantially in a straight line with respect to each ot... | 09/28/2004 |
| 6798810 | Surface-emitting laser having lateral current injection The invention describes a surface-emitting laser (VCSEL) with lateral current injection. The pump current (4), from the contact face (2) on the decoupling side, in a first region (12) outside the resonator volume, is carried predominantly parall... | 09/28/2004 |
| 6795483 | Optical component driving device in laser apparatus In a laser apparatus, precision of wavelength control, wavelength stability and speed of wavelength control are increased, and an optical component is prevented from being polluted. A ball screw is used a feed screw of a feed screw mechanism that changes the orienta... | 09/21/2004 |
| 6792010 | Laser with reduced parasitic etalon effects According to the present invention, laser performance is improved by appropriately matching the spectral periods of various etalons within the laser cavity. A first embodiment of the invention is a discretely tunable external cavity semiconductor laser where a grid ... | 09/14/2004 |
| 6792016 | Cooled mirror device A cooled mirror device for laser systems or the like, comprising a main mirror body and a mirror cover rigidly connected to the main mirror body, wherein the main mirror body and/or the mirror cover have a cooling device, wherein the mirror cover is made from an alu... | 09/14/2004 |
| 6788718 | Implementation of ultrahigh frequency emitters and applications to radar and telecommunications The invention concerns an ultrahigh frequency emitting device, having: at least a first and a second microlaser (22, 24), emitting at two different frequencies ω1 and ω2, means of slaving the first and the second microlas... | 09/07/2004 |
| 6788715 | Stabilized laser using multiphoton absorption to reduce intensity fluctuations An IAU laser is stabilized to reduce intensity fluctuations. The laser comprises an IAU gain medium disposed in an optical resonance cavity and a multiphoton absorbing medium disposed in the cavity to reduce intensity fluctuations. A pump source to excite the gain m... | 09/07/2004 |
| 6785304 | Waveguide device with mode control and pump light confinement and method of using same A waveguide device in the form of either a solid-state laser or amplifier is divided into separate pumping and output mode control sections along at least one direction of the device by leaving a portion of a core of the device unclad or by depositing appropriate co... | 08/31/2004 |
| 6782030 | Gas laser The present invention relates to a gas laser with a high-voltage electrode 12 and a ground electrode 14, which electrodes 12, 14 are disposed relative to each other so as to form a discharge gap 16 between them, and with high voltage gene... | 08/24/2004 |
| 6778562 | Optical coupler for a multimode pump The invention concerns an optical coupler formed of a photonic optical fiber (2) assembled by melting and stretching with at least one multimode optical fiber (4, 6). The phototonic fiber can be used to inject or extract a signal, whereas the multimode... | 08/17/2004 |
| 6778564 | Wavelength-variable light source Lenses 102, 103, and 104, a diffraction grating 105, a mirror 106, a light isolator 107, an arm 108, a pulse motor 109, and a pulse motor 110 operate in conjunction for mechanically roughly adjusting the wavele... | 08/17/2004 |
| 6778565 | Pulse-generating laser An optically pumped laser with an Er:Yb: doped solid state gain element is disclosed, which is passively mode-locked by means of a saturable absorber mirror. The laser is designed to operate at a fundamental repetition rate exceeding 1 GHz and preferably at an effec... | 08/17/2004 |
| 6775313 | Laser having a temperature controlled solid-state dye gain element A laser includes a first optically reflective element; a second optically reflective element opposed to and aligned with the first optically reflective element to define a laser cavity having an optical axis; an optical pump source for injecting optical pump energy ... | 08/10/2004 |
| 6768750 | Multi-spectral line Raman laser A multiple spectral line Raman laser having adjustable relative power output between different spectral lines is provided. The laser includes a lasing cavity, first and second reflectors optically coupled to a back end of the cavity that reflects substantially all l... | 07/27/2004 |
| 6765934 | Laser repetition rate multiplier A method for recording an image on a photosensitive surface, comprising: producing a primary pulsed light beam; converting the primary light beam, in a light wavelength converter separate from the pulsed light source, to an ultraviolet pulsed light bea... | 07/20/2004 |
| 6763045 | Apparatus for and method of targeting An apparatus for laser beam targeting and method of laser cutting or marking of an article is disclosed. In one aspect of the invention, the laser beam targeting apparatus comprises at least one laser scan head comprising at least one motor driven deflector for scan... | 07/13/2004 |
| 6757310 | Solid-state laser for customized cornea ablation A diode pump, solid state laser deep UV laser source is described for customized ablation in photo-refractive surgery. The solid-state deep UV laser source is tailored to have a pulse repetition rate of about 1 kHz and a relatively small spot size at both positions ... | 06/29/2004 |
| 6757309 | Low inductance laser diode arrays, laser diode array assemblies, and fabrication thereof A laser diode array, having one or a plurality of electrically mounted laser diode bars, in which current paths through the array are sufficiently parallel and close together to result in a substantial reduction of inductance. As a result, higher duty cycles at lowe... | 06/29/2004 |
| 6741631 | Customizable apodized chiral fiber grating apparatus and method A apodized chiral fiber grating consists of a chiral fiber with a variable effective grating strength along different regions of its length, such that the effective grating strength gradually increases from one end of the chiral fiber until a peak effective grating ... | 05/25/2004 |
| 6741628 | Micro-cavity laser The present invention is a micro-cavity laser and methods related thereto. In the preferred embodiments, the micro-cavity laser comprises a laser pump signal in a fiber waveguide which is optically coupled to a micro-cavity resonator through a fiber taper. The micro... | 05/25/2004 |
| 6741627 | Photolithographic molecular fluorine laser system The invention provides a two-stage laser mode of photolithographic molecular fluorine laser system for matching the center wavelength of an oscillation-stage laser to the center wavelength of an amplification-stage laser, thereby oscillating a laser beam having a lo... | 05/25/2004 |
| 6738396 | Laser based material processing methods and scalable architecture for material processing 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... | 05/18/2004 |
| 6738406 | Precision measurement of wavelengths emitted by a molecular fluorine laser at 157nm An excimer or molecular fluorine laser system includes a wavelength calibration module permitting the wavelength of the narrow band output beam to be calibrated to a specific absolute wavelength. The module is preferably a lamp which contains at least one species in... | 05/18/2004 |
