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7545839 |
Apparatus and method for driving a pulsed laser diode
To achieve both a fast risetime and a desired flat top current pulse, or to be able to independently specify a risetime and pulse width (energy), a supplemental or “fast” voltage discharge...
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7447249 |
Lighting system
A lighting system includes a microwave resonator ( 2 ) for generating a standing microwave in the internal space, and a gas cell ( 6 ) enclosing a medium is disposed in the internal space of the...
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7196342 |
Systems and methods for reducing the influence of plasma-generated debris on the internal components of an EUV light source
Systems and methods are disclosed for reducing the influence of plasma generated debris on internal components of an EUV light source. In one aspect, an EUV meteorology monitor is provided which...
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6950453 |
Pulser driven, helium free transversely excited atmospheric-pressure (TEA) CO2 laser
A novel and inexpensive excitation circuit based on a single switch and a single source drives helium-free TEA CO 2 lasers, mini to conventional types, providing low divergent output. By varying...
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6914927 |
Laser discharge chamber passivation by plasma
Methods and apparatus are provided for cleaning and passivating laser discharge chambers with plasmas. In one embodiment, an oxygen based plasma is formed in a plasma source external to the laser...
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6847670 |
Gas laser apparatus emitting ultraviolet radiation
The oscillation pulse width is extended in a gas laser apparatus emitting ultraviolet radiation by a high-repetition rate oscillating operation. The gas laser apparatus has a pair of laser...
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6782029 |
Dedusting unit for a laser optical element of a gas laser and method for assembling
A dedusting unit for a laser optical element is provided. The dedusting unit comprises a high-voltage duct comprising a high-voltage conducting core having a first end and a second end and an...
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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...
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6757315 |
Corona preionization assembly for a gas laser
A preionization device for a gas laser includes an internal preionization electrode having a dielectric housing around it such that the preionization device is of corona type. The internal...
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6744802 |
Laser oscillating apparatus with slotted waveguide
In a slot array structure, electromagnetic wave emission which is uniform as a whole over the length of a laser tube is realized to allow uniform laser emission with minimum energy loss. Slots ( 10...
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6728284 |
High power solid state laser modulator
A multi-stage magnetic modulator provides a pulse train of ±40 kV electrical pulses at a 5-7 kHz repetition rate to a metal vapor laser. A fractional turn transformer steps up the voltage by a...
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6665486 |
Single photon generating apparatus
A single photon generating apparatus includes an optical waveguide, an active medium section and a resonator section. In the active medium section, a single electron is excited in response to...
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6650678 |
Laser oscillating apparatus
A plasma is excited uniformly as a whole over the length of each slot. A laser oscillating apparatus is designed to excite a laser gas in a laser tube ( 2 ) by introducing electromagnetic waves...
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6650679 |
Preionization arrangement for gas laser
A preionization device for a gas laser comprises an internal preionization electrode having a dielectric housing around it and an external preionization electrode displaced from the dielectric...
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6614827 |
High power laser
In an apparatus and method for generating high power laser radiation, the geometry of the resonant laser cavity defines a fundamental spatial or transverse cavity mode. A gain medium is disposed...
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6603790 |
Gas laser and a dedusting unit thereof
A gas laser and a dedusting unit thereof are provided. The gas laser comprises a tube containing a gas mixture including a laser gas and preferably a buffer gas. The tube preferably comprises a...
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6570903 |
Electric-optical singlet sigma and singlet delta oxygen generator
A generator produces a flow of gaseous molecular oxygen in the singlet sigma and/or singlet delta excited electronic states. The generator is comprised of an optical source; coupling optics to...
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RE38054 |
Reliable, modular, production quality narrow-band high rep rate F2 laser
The present invention provides a reliable modular production quality excimer laser capable of producing 10 mJ laser pulses in the range of 1000 Hz to 2000 Hz or greater. Replaceable modules include...
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6522679 |
Gas laser discharge unit
A gas laser discharge unit is provided. The discharge unit includes an elongated electrode plate having a plurality of spaced-apart holes therein and a plurality of coaxial high voltage ducts. Each...
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6456643 |
Surface preionization for gas lasers
An excimer or molecular fluorine laser includes one or more sliding surface discharge preionization units each including an elongated preionization electrode spaced from one or more associated...
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6343089 |
Microwave-driven ultraviolet light sources
A microwave-driven ultraviolet (UV) light source is provided. The light source comprises an over-moded microwave cavity having at least one discharge bulb disposed within the microwave cavity. At...
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6333941 |
Tunable optical transmitter and tunable light source
The invention is a tunable optical transmitter and light source in which a gain media is connected in an optical loop or resonator and a tunable filter is inserted in to the loop. A sensor is...
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6259716 |
Microwave excited gas laser oscillator
In one discharge tube in which laser gas flows, a plurality of microwave generating units composed of microwave power sources, magnetrons and waveguides are disposed, and each magnetron oscillates...
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6243407 |
High power laser devices
In an apparatus and method for generating high power laser radiation, the geometry of the resonant laser cavity defines a fundamental spatial or transverse cavity mode. A gain medium is disposed...
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6229837 |
Metal-vapor pulsed laser
The present invention provides a novel metal-vapor pulsed laser capable of being manufactured without using a large-sized laser tube or an expensive discharging circuit. The output and the...
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6198761 |
Coaxial laser pulser with solid dielectrics
A pulser with solid dielectrics including a pulse compressor and pulse transformer apparatus, which is able to produce short bursts of electrical energy at high voltage utilizing a coaxial...
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6198646 |
Commutation circuit for arresting and dissipating energy reflected from a magnetic pulse compression network
An improved commutation circuit configured to arrest and dissipate energy which may be reflected from a magnetic pulse compression network. The commutation circuit includes an energy storage...
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6198762 |
Supersonic and subsonic laser with RF discharge excitation
Disclosed is a gas laser utilizing radio frequency discharge excitation in the area of sonic or supersonic/subsonic transfer gas flow. The laser uses various types of gases and mixtures of gases as...
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6192058 |
Multiwavelength actively mode-locked external cavity semiconductor laser
A multiwavelength mode-locked (MWML) angled-stripe SOA laser that emits multiple discrete groups of wavelengths simultaneously in a short time interval, where each group is located at a wavelength...
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6137818 |
Excitation of gas slab lasers
An RF-excited discharge laser includes a pair of electrodes and an RF power source, both electrodes being ungrounded, the power source being adapted to apply an RF voltage to both electrodes, the...
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6134256 |
Slice laser
The performance of an RF excited gas laser having a discharge region with a generally curvilinear orthogonal cross-section, the shorter of the two dimensions of the discharge region cross-section...
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6061379 |
Pulsed x-ray laser amplifier
Two techniques for producing plasma x-ray laser amplifiers, encompassing laser generated high density, micron-sized plasma columns, and microwave driven low density, large plasma volumes which...
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6061375 |
Laser irradiation system and application thereof
Dispersion of energy density in the longitudinal direction of excimer laser shaped into a linear beam is corrected. A gas introducing system which extends in the longitudinal direction of an...
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6028872 |
High pulse rate pulse power system with resonant power supply
A high pulse rate pulse power source for supplying controlled high energy electrical pulses at rates of 2000 Hz or greater. The source includes a pulse generating circuit including a charging...
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6018537 |
Reliable, modular, production quality narrow-band high rep rate F.sub.2 laser
The present invention provides a reliable modular production quality excimer laser capable of producing 10 mJ laser pulses in the range of 1000 Hz to 2000 Hz or greater. Replaceable modules include...
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5982787 |
Rippled beam free electron laser amplifier
A free electron laser amplifier provides a scalloping annular electron beam that interacts with the axial electric field of a TM 0n mode. A waveguide defines an axial centerline and, a solenoid...
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5962986 |
Solid state RF light driver for electrodeless lighting
A transformerless power oscillator for driving a high intensity electrodeless light bulb. The driver uses a silicon carbide static induction transistor (SIT) operating as a power oscillator powered...
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5933440 |
Electronic-laser system for outputting radio-frequency signal and pulse laser beam synchronous with radio-frequency signal
A master radio-frequency signal output from a master oscillator is input to a frequency converter. The frequency converter generates and outputs a multiplied signal having a frequency higher than...
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5854806 |
Multi-channel, RF-excited gas discharge laser
The invention relates to a multi-channel RF-excited gas laser device which has an elongate tubular dielectric housing 1. The housing has a common elongate ground electrode 2 therein and a plurality...
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5825791 |
Variable coherence length high brightness laser architecture
A high power laser source having a preselected broad bandwidth, including a master oscillator providing a single-mode laser beam, a resonant electro-optical modulator and a source of...
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5818864 |
Method and device for generating a laser beam
Described are a method for generating a laser beam and a laser device for practising the method. In a first step gas is ionised by means of X-rays. In a second step the electron density is...
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5748663 |
Retangular discharge gas laser
A transverse RF pumped gas laser has a large area discharge which is of generally rectangular shape in all plan views. In cross-section the geometry of the discharge has a longer and a shorter...
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5719896 |
Low cost corona pre-ionizer for a laser
An anode and an a cathode in a gas laser, such as an excimer laser, are spaced in a first direction. A voltage difference between these members produces an electrical discharge which ionizes gasses...
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5706305 |
Gas laser oscillating apparatus for discharging laser beam by exciting gas with microwave
Carbon dioxide gas is fed in a metallic laser tube extending along an optical axis through a plurality of gas feeding tubes placed outside the optical axis and is taken out from the metallic laser...
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5689523 |
Excitation system for multi-channel lasers
An excitation system for a gas laser featuring a multiplicity of gain channels uses a resonant cavity to provide broad band RF power division and impedance matching to the multiplicity of gain...
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5684821 |
Microwave excited laser with uniform gas discharge
A microwave excited laser using a sealed CO2 gas mixture for the laser medium. The laser has means for producing a uniform discharge throughout the length of the laser by using a plurality of...
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5682400 |
Supersonic and subsonic laser with high frequency discharge excitation
Disclosed is a gas laser utilizing high frequency discharge excitation in the area of sonic or supersonic/subsonic transfer gas flow. The laser uses various types of gases and mixtures of gases as...
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5663971 |
Axial interaction free-electron laser
Electron orbits from a helical axial wiggler in an axial guide field are absolutely unstable as power is extracted from the particles. For off-axis beams an axial FEL mechanism exists when the...
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5659567 |
Microwave-driven UV light source and solid-state laser
A solid-state lasers and method of operating the laser is described having a microwave-driven (MWD) visible excimer fluorescence source for exciting a solid-state laser. The laser of this invention...
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5651016 |
Ultrahigh speed laser
An apparatus and method for obtaining ultra-high speed operation of a semiconductor laser diode is presented. The invention utilizes any of a variety of conventional laser diodes in combination...
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