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| Number | Title | Issue Date |
| 4847858 | Optical resonator for a laser An optical resonator has two resonator mirrors disposed opposite one another on a mirror carrier which is divided at an angle relative to a perpendicular plane to the optical axis. Precise adjustment of the mirror spacing is provided by movement along the... | 07/11/1989 |
| 4839902 | Laser with controlled geometry fluorescent converter The efficiency of an optically pumped solid state laser is substantially improved with a controlled geometry fluorescent converter between the pump light source and the lasing medium. Fluorescent materials have the capability of absorbing broadband pumpin... | 06/13/1989 |
| 4835778 | Subpicosecond fiber laser A fiber laser for producing subpicosecond pulses is formed by placing a laser fiber in a resonant cavity, in either a linear or closed loop configuration. The laser fiber is formed of two different types of fibers joined in series, a gain fiber which cont... | 05/30/1989 |
| 4833680 | Method of controlling the optical power output of a laser, and circuit for carrying out the method An optical transmitter for digitally transmitting data by using NRZ pulses. The transmitter has a laser diode whose operating current consists of a bias current and a modulation current. A photodiode measures the optical performance of the laser diode. Al... | 05/23/1989 |
| 4825446 | Laser apparatus having cathode bore directing electron beam onto anode Laser apparatus includes a ceramic tube within which is contained a gas and a cylindrical cathode having a plurality of holes therethrough. An anode is located along the axis of the tube. During operation of the apparatus, a large potential difference is ... | 04/25/1989 |
| 4817111 | Gas laser apparatus, method and turbine compressor therefor A fast axial flow gas laser apparatus comprising an at least essentially closed loop defining a flow path for a laser gas, an arrangement for exciting gas flowing in the loop of the apparatus to cause the gas to lase, and a regenerative compressor for flo... | 03/28/1989 |
| 4817098 | Semiconductor laser driver system Light quantity and temperature settings are applied by a control circuit to a semiconductor laser controller and a temperature controller, respectively. A temperature actuator is controlled by the temperature controller responsive to an output signal from... | 03/28/1989 |
| 4815079 | Optical fiber lasers and amplifiers Apparatus for coupling radiation into a single-mode core of an optical fiber laser has a single-mode core disposed within a relatively large, multimode cladding at a location which is displaced from the center of the cross-section of the cladding. The cla... | 03/21/1989 |
| 4815086 | Laser pulse modulator The invention is directed to the power control of a gas laser being moved by a prime mover along at least two different axes at various speeds to provide effectively constant output power to the workpiece surface. Signals from the prime mover axis represe... | 03/21/1989 |
| 4814776 | Optimally grounded small loop antenna A small closed loop antenna is formed by a flat metal member formed into a U-shape which also serves as the front, back and top surfaces, or parts thereof, of the housing for a portable communications receiver. Connected to the open (bottom) end of the ar... | 03/21/1989 |
| 4815088 | Semiconductor laser array device A semiconductor laser array device with a waveguide structure comprising waveguides designed such that the widths thereof gradually increase from the center waveguide to the waveguides positioned at both sides of the array portions.... | 03/21/1989 |
| 4814778 | Large scan antenna with fixed main reflector and fixed feed, particularly for use at ultrahigh frequencies, carried on board a satellite and a satellite equipped with such an antenna A large scan antenna, particularly for embarked use on board a satellite and for operation in the ultrahigh frequency range, of the type formed of a feed and a main fixed secondary reflector, the antenna being readily foldable into a launching configurati... | 03/21/1989 |
| 4815095 | Resonant laser cavity system A resonant laser cavity system (10) is provided which is divided into three sections (20, 22 and 24). Sections (20 and 24) include a pair of opposing discharge tube members each including an outer discharge tube (28) and an inner discharge tube (26). On o... | 03/21/1989 |
| 4815092 | Laser generator with zeolitic catalyst carrier and method of making same A laser generator with a catalyst for the laser gas is provided comprising a cavity which communicates with a housing receiving a catalytic cartridge, which communicates also with a laser gas reserve, and which is subjected to the action of the heat relea... | 03/21/1989 |
| 4815087 | High speed stable light emitting semiconductor device with low threshold current A highly efficient light emitting semiconductor device which is stable at high speeds and has a low threshold current comprising a first semiconductor layer of a first conductive type; a second semiconductor layer of the second conductive type which is di... | 03/21/1989 |
| 4813046 | Optical scanning method A modulated laser beam emitted from a semiconductor laser is deflected by a rotating light beam deflector to scan a surface, without using an fθ lens. The light intensity of the laser beam is set to a first reference level by a reference signal, and to a... | 03/14/1989 |
| 4811349 | Cr3+ -doped colquiriite solid state laser material Chromium doped colquiriite, LiCaAlF6 :Cr3+, is useful as a tunable laser crystal that has a high intrinsic slope efficiency, comparable to or exceeding that of alexandrite, the current leading performer of vibronic sideband Cr3+... | 03/07/1989 |
| 4809286 | Laser driver circuit A laser driver circuit is disclosed for operating an electrical current driven light emitting device or laser. The laser driver circuit is driven from external equipment by a modulated electrical signal and includes a laser biasing network arranged to pro... | 02/28/1989 |
| 4809285 | Correlated emission laser Method and device for correlating the spontaneous emission of photons into laser fields. Atoms of a common lasing medium of multiple laser fields are excited into a coherent superposition of upper levels. When photons are emitted into the laser fields, th... | 02/28/1989 |
| 4809288 | Hybrid Y-junction laser array A semiconductor laser array having a plurality of waveguides at least some of which are directly joined at Y-junctions. The region near the Y-junctions provides a phase boundary condition in which lightwaves propagating in adjacent waveguides are in phase... | 02/28/1989 |
| 4807232 | Phase locked staggered dielectric ridge array waveguide gas laser A phase-locked staggered ridge array waveguide gas laser includes a body that circumferentially bounds an internal space extending along a central plane and containing a gaseous lasing medium. The gaseous medium is excited at radio frequency with attendan... | 02/21/1989 |
| 4807240 | Frequency adding lasers and optical amplifiers A method for creating population inversions for use in stimulated emission devices which beam combine, beam clean-up, or frequency up-convert electromagnetic radiation. The invention comprises near resonantly enhanced multiphoton pumping of a multilevel q... | 02/21/1989 |
| 4807234 | Phase locked alternating dielectric ridge gas laser A phase-locked ridge waveguide gas laser includes a body having two major and two minor limiting surfaces together circumferentially bounding an internal space within the body, which contains a gaseous lasing medium. The gaseous medium is excited at radio... | 02/21/1989 |
| 4807233 | Phase locked cusp-shaped dielectric ridge gas laser A phase-locked ridge waveguide gas laser includes a body that circumferentially bounds an internal space extending along a central plane and containing a gaseous lasing medium. The gaseous medium is excited at radio frequency with attendant light emission... | 02/21/1989 |
| 4807245 | Distributed-feedback type semiconductor laser A distributed-feedback type semiconductor laser device having an active layer arranged between a pair of clad layers is provided with a stripe-shaped distributed-feedback mechanism, for example, having the configuration of a diffraction grating, and dummy... | 02/21/1989 |
| 4807242 | Gas laser discharge tube A high power gas laser and, in particular, a high power continuous wave gas laser. The discharge chamber of the laser has a plurality of first electrodes. The electrodes of opposite polarity take the form of a coil. The first electrodes take the form of a... | 02/21/1989 |
| 4805183 | Distributed feedback semiconductor laser device A distributed feedback semiconductor laser device with a resonator comprising a multi-layered optical waveguide that contains an optical guiding area with a periodic corrugation, the optical guiding area being composed of at least two regions, a first reg... | 02/14/1989 |
| 4803687 | Thermally buffered sodium-neon laser target for coherent x-ray production A carbon layer between a neon layer and a sodium layer serves as a thermal buffer therebetween to enable the neon layer to remain at a lower temperature and density to allow for the generation of coherent x-rays. A high powered laser heats the sodium laye... | 02/07/1989 |
| 4803697 | Cold welded laser mirror assembly A gas laser tube is fitted with internal mirrors only and no windows. The laser tube is processed by heating the tube with the ends open in a vacuum oven to drive out contaminating substances. The mirrors are installed by cold welding after the tube has b... | 02/07/1989 |
| 4802176 | Double moving grating laser This invention relates to a laser apparatus having a gain medium disposed along an optical path between a first and second reflector, with the first one being a phase conjugate reflector. The second reflector comprises an SBS medium for generating a movin... | 01/31/1989 |
| 4800569 | Reflector design for a slab laser A method for computing a reflector shape for an optically pumped slab laser in order to produce a desired focal power lens effect distribution across the width thereof is disclosed. A desired pumping profile corresponding to the desired lens effect distri... | 01/24/1989 |
| 4797894 | Alignment method and arrangement for external optical feedback for semiconductor diode lasers A semiconductor diode laser has at least one output beam emitted from an emission aperture from a facet of the laser. An external optical feedback resonator redirects the output beam back into the laser emission aperture. The resonator comprises a reflect... | 01/10/1989 |
| 4796267 | Laser control circuit Disclosed is a laser control circuit used for an optical disc player. The laser output is digitally modulated, when recording to have high and low levels. The invention provides the laser control circuit capable of controlling the high level and the low l... | 01/03/1989 |
| 4796275 | Floating mirror mount A floating mirror mount for a mirror of a laser comprises a mirror having a front surface and a back surface. A keeper encircles the mirror and has a peripheral flange which engages the front surface of the mirror when the mirror mount is not installed in... | 01/03/1989 |
| 4796270 | Compact rigid dye laser construction A dye laser is of compact, rigid and simple construction, with a folded resonator cavity contained on a single rigid block of material, such as aluminum. The block has two or three mirror mount locations, at least one of which is a machined surface which ... | 01/03/1989 |
| 4794612 | Metal ion laser A metal ion laser includes a glass tube, a hollow cathode installed in the glass tube, a plurality of anodes arranged on the glass tube, a pair of Brewster windows fixed to both end of the glass tube, at least one of reservoir recessed in the glass tube f... | 12/27/1988 |
| 4794603 | Power source for an axial-flow CO2 laser tube A power device for an axial-flow-type CO2 laser tube in which a high DC voltage is applied to the cathode side of the laser tube, a ballast resistance is connected to the anode side, and power at a high voltage pulse is applied to this anode si... | 12/27/1988 |
| 4792956 | Laser diode intensity and wavelength control The actual values of intensity and wavelength of the optical signal output from a laser diode are compared to desired values thereof to generate intensity and wavelength error signals. The rates of change of the wavelength and intensity as functions of te... | 12/20/1988 |
| 4791633 | Polarization feedback laser stabilization A system for locking two Nd:YAG laser oscillators includes an optical path for feeding the output of one laser into the other with different polarizations. Elliptical polarization is incorporated into the optical path so that the change in polarization th... | 12/13/1988 |
| 4791632 | Compensated laser diode transmitter A compensated laser diode transmitter for high speed data transmission is provided with a pair of current switches, a novel current summing circuit and a novel current sink. The power output of the laser is sensed in real data time and employed to generat... | 12/13/1988 |
