RussianPatents.com
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Gas-discharge laser. RU patent 2519867. |
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FIELD: physics, optics. SUBSTANCE: invention relates to laser engineering. In the gas-discharge laser, capacitors which are low-inductively connected to laser electrodes are arranged near a first electrode in ceramic containers. Parts of each long ceramic container are arranged on the side of the discharge region to form, upstream and downstream of the discharge region, gas stream guides/spoilers which considerably alter the direction of the gas stream when passing through the discharge region. The capacitors are low-inductively connected to a pulsed power supply through current leads of each container, high-voltage current leads of a laser metal chamber and long grounded current leads arranged on both sides of the electrodes. EFFECT: high laser power. 7 cl, 3 dwg
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Apparatus for exciting spatial charge in dense gases / 2519657 Invention relates to quantum electronics and can be used to excite active media of gas lasers. The apparatus for exciting spatial charge in dense gases includes a high-voltage source connected to elongated, blade-shaped corona and current-collecting electrodes mounted along a dielectric cylinder which is capable of rotating. An electroconductive screen and a dielectric film are placed on the outer surface of the cylinder, wherein the corona electrode is placed along the radius of the cylinder with spacing from the cylinder. The screen is in form of two or more sections extending along the cylinder and electrically insulated from each other, wherein the section passing through the zone of the blade-shaped corona electrode is connected by a sliding contact to the grounded terminal of the source, and the section pass through the zone of the blade-shaped current-conducting electrode is connected by a sliding contact to the potential terminal of the source. Potential applied to a section of the screen can be controlled, for example, by a potentiometer. |
Apparatus for exciting spatial charge in dense gases / 2519657 Invention relates to quantum electronics and can be used to excite active media of gas lasers. The apparatus for exciting spatial charge in dense gases includes a high-voltage source connected to elongated, blade-shaped corona and current-collecting electrodes mounted along a dielectric cylinder which is capable of rotating. An electroconductive screen and a dielectric film are placed on the outer surface of the cylinder, wherein the corona electrode is placed along the radius of the cylinder with spacing from the cylinder. The screen is in form of two or more sections extending along the cylinder and electrically insulated from each other, wherein the section passing through the zone of the blade-shaped corona electrode is connected by a sliding contact to the grounded terminal of the source, and the section pass through the zone of the blade-shaped current-conducting electrode is connected by a sliding contact to the potential terminal of the source. Potential applied to a section of the screen can be controlled, for example, by a potentiometer. |
Apparatus for generating volumetric self-sustained discharge / 2517796 Apparatus for generating volumetric self-sustained discharge has a discharge chamber in which are mounted three electrode pairs which are connected to a pumping source, each pair consisting of plate-like profiled electrodes. Each cathode plate is situated in the plane of the corresponding anode plate and electrode pairs are mounted either parallel to the longitudinal axis of the chamber or at an acute angle to said axis. The working edge of the central cathode plates has at the centre a straight portion to which portions with a Stepperch profile adjoin at both sides. The working edge of the central anode plates has an arched shape and faces the discharge gap with its convex surface. Portions of the working edges of the outermost anode and cathode plates, facing the centre electrodes, repeat the profile of the working edge of corresponding anode and cathode central plates. Outer portions of working edges of the outermost anode and cathode plates have an arched shape and a longer length than portions of working edges of the outermost anode and cathode plates facing the centre electrodes, wherein all portions of the working edges have smooth mating. |
Gas-discharge laser, laser system and method of generating radiation / 2514159 Invention relates to laser engineering. The gas-discharge laser includes: a laser chamber (1) consisting a ceramic material and filled with a gas mixture, elongated electrodes (2, 3) defining a discharge region (4), a preionisation unit (5); the gas circulation system (9, 10, 11, 12, 13); a set of capacitors (14) arranged outside the laser chamber (1) and connected to the first and second electrodes (2, 3) via electrical leads (17, 18) of the laser chamber (1) and gas-permeable reverse current leads (19) disposed in the laser chamber on both sides of the electrodes; a power supply connected to the capacitors and a resonator. The laser chamber (1) comprises a ceramic tube (24) and two end flanges (25) rigidly interconnected by a fastening system (26) that extends along the ceramic tube (24). The fastening system (26) is in form of a metal tube encircling the ceramic tube, equipped with a sufficiently wide extended recess for installing the set of capacitors (14) and having on the faces of the end flanges attached to end flanges (25) of the laser chamber (1) or in form of tightening beams. |
Gas discharge laser / 2510110 Gas discharge laser comprises: a laser chamber filled with a gas mixture, consisting of ceramic material and comprising the first and second electrodes distant from each other and defining the area of discharge between them, a lengthy pre-ionisation unit and a gas circulation system. The first electrode is located near the inner surface of the laser chamber. The set of capacitors, to which a power supply source is connected, is located outside the laser chamber and is connected with the first and second electrodes via electric inputs of the laser chamber and gas permeable return current leads arranged in the laser chamber at both sides of the electrodes. At the same time the laser chamber comprises a ceramic pipe with two end flanges, which are rigidly connected to each other by means of a lengthy fastening system, and the ceramic pipe of the laser chamber has a lengthy niche at the inner side, where at least the first electrode is installed. Parts of the inner surface of the pipe adjoining the niche form guides of gas flow or spoilers arranged upwards and downwards along the flow from the first electrode. |
Gas discharge laser and method of radiation generation / 2510109 Gas discharge laser comprises: a laser chamber comprising lengthy electrodes distanced from each other, a lengthy pre-ionisation unit; a system of gas circulation; a set of capacitors installed in ceramic containers located near the first electrode, the specified capacitors are connected to electrodes via current leads of ceramic containers and via current leads arranged at both sides of electrodes. The laser also comprises a pulse source of power supply connected to capacitors, at the same time in the laser chamber there are additional lengthy ceramic containers, each comprising additional capacitors. There are tight current leads installed in walls of each additional container along it. At the same time capacitors are connected to the second electrode via gas permeable current conductors, current leads of each additional container and additional capacitors. Outside the laser chamber there is an additional pulse source of supply, polarity of which is opposite to the polarity of the source of supply, being connected to additional capacitors. |
Gas discharge laser, laser system and method of radiation generation / 2507654 In a gas discharge laser capacitors (11), which are in a low inductive manner connected to electrodes (2, 3) of the laser, are placed near the first electrode (2) in ceramic containers (10) and in a low inductive manner are connected to a pulse source of power supply (15) via current leads (12, 13) of each container, high-voltage current leads (21) of a metal laser chamber (1) and lengthy grounded current leads (23), arranged at both sides of ceramic containers (10). End parts (29) of each ceramic container (10) are tightly fixed in the ends (30) of the laser chamber (1) with the possibility of access or connection to the inner part of the container (10). |
Gas discharge laser / 2507653 Gas discharge laser comprises the following: a laser chamber filled with a gas mixture, which comprises the first and second long electrodes that are distant from each other, a pre-ionisation unit, a system of gas circulation, a set of capacitors arranged outside the laser chamber and connected to electrodes via electric inputs of the laser chamber and gas permeable reverse current conductors, arranged in the laser chamber at both sides of electrodes, a source of power supply connected to capacitors and designed for their pulse charging to breakthrough voltage, and a resonator for generation of a laser beam. The laser chamber comprises a ceramic pipe with two end flanges rigidly fixed to each other by means of a fastening system stretched along the ceramic pipe. Each of end flanges is sealed with a ceramic pipe by means of a circular gasket placed on the outer surface of the end part of the ceramic pipe. Each end flange has a circular niche on the inner side, where the end of the ceramic pipe is placed, and the end flange closely adjoins the ceramic pipe only on its outer surface in place of installation of a sealing circular gasket. |
Gas-discharge laser and method of generating radiation / 2506671 Invention relates to laser engineering. The laser, preferably an excimer laser, includes a laser chamber consisting of ceramic material and having elongated first and second electrodes, the first of which is situated near the inner surface of the laser chamber, a pre-ionisation unit; a gas circulation system; a set of capacitors situated outside the laser chamber, and a power supply connected to the capacitors. Elongated ceramic containers housing additional capacitors are placed near the second electrode. The capacitors and the additional capacitors are connected in series to each other through earthed gas-permeable reverse current lead situated on both sides of the electrodes and are connected to the first and second electrodes through leads of the laser chamber and leads of the ceramic containers. |
Gas-discharge laser / 2503104 In the gas-discharge laser, capacitors which are low-conductance connected to electrodes of the laser, are placed near the first electrode in ceramic containers and are low-inductance connected to a pulsed power supply through current leads of each container, high-voltage current leads of the metallic laser chamber and extended earthing leads, placed on both sides of the containers. |
High-frequency excited co2 waveguide laser / 2244367 Proposed laser has two channels of which first one functions as discharge channel, as well as high-reflection and light-splitting mirrors installed at ends of discharge channel. Each channel is bound on opposite ends with extreme and central electrodes and on two other ends, with insulating wafers. One of extreme electrodes has rectangular longitudinal slot of depth L ≥ 1.5h and width H ≥ h + 1 to form insulating space together with closest second channel holding additional working gas supply, where h is discharge channel width. |
High-frequency excited co2 waveguide laser / 2244367 Proposed laser has two channels of which first one functions as discharge channel, as well as high-reflection and light-splitting mirrors installed at ends of discharge channel. Each channel is bound on opposite ends with extreme and central electrodes and on two other ends, with insulating wafers. One of extreme electrodes has rectangular longitudinal slot of depth L ≥ 1.5h and width H ≥ h + 1 to form insulating space together with closest second channel holding additional working gas supply, where h is discharge channel width. |
Method and device for producing laser beam / 2244990 Proposed method used for producing beam from pulse-periodic laser pumped with self-maintained spatial discharge with XeXl, KrF, CO2, and HF base active means includes formation of at least one electrode of a number of plasma generations near effective surface with self-maintained spatial discharge producing repetitive plasma structure and generation of laser beam. Plasma generations are formed in any plane perpendicular to optical axis of laser near effective surface of at least one of electrodes, its size being smaller than maximal size of plasma generation at one repetition period of plasma structure and smaller than or equal to size of laser radiation beam produced in same plane near effective surface of mentioned electrode. Device implementing this method has at least two opposing electrodes connected to common buses of pumping source and optical cavity; at least one of electrodes is made of repetitive parts each having its respective effective surface. Repetitive electrode parts are installed either in planes parallel to optical axis of laser or in those disposed at acute angle to this axis, or in cylindrical surfaces with generating lines perpendicular to optical axis of laser and guides of these surfaces in the form of curves or broken lines. Such design ensures desired energy distribution for various processes. |
Method and device for producing laser beam / 2244990 Proposed method used for producing beam from pulse-periodic laser pumped with self-maintained spatial discharge with XeXl, KrF, CO2, and HF base active means includes formation of at least one electrode of a number of plasma generations near effective surface with self-maintained spatial discharge producing repetitive plasma structure and generation of laser beam. Plasma generations are formed in any plane perpendicular to optical axis of laser near effective surface of at least one of electrodes, its size being smaller than maximal size of plasma generation at one repetition period of plasma structure and smaller than or equal to size of laser radiation beam produced in same plane near effective surface of mentioned electrode. Device implementing this method has at least two opposing electrodes connected to common buses of pumping source and optical cavity; at least one of electrodes is made of repetitive parts each having its respective effective surface. Repetitive electrode parts are installed either in planes parallel to optical axis of laser or in those disposed at acute angle to this axis, or in cylindrical surfaces with generating lines perpendicular to optical axis of laser and guides of these surfaces in the form of curves or broken lines. Such design ensures desired energy distribution for various processes. |
Excimer laser / 2249282 Proposed excimer laser that can be used for intracavitary therapy in medicine, for microelectronics, laser chemistry, and processes using heavy-power ultraviolet rays has electrode system, pulse power circuit with storage capacitor, and switch in the form of thyratron. Electrode system has insulating plate that carries electrodes; thyratron is connected in series with storage capacitor and electrode system. Electrode system is designed to ensure pumping of excimer gas medium with discharge creeping over insulating plate surface. |
Method and device for exciting self-restrained and self-heated metal atom junction pulsing lasers / 2251179 Proposed method includes generation of one additional delay pulse with each drive pulse at certain delay between pulses and constant energy insertion in laser active element. Lasing power characteristics at stabilized parameters of plasma are controlled by momentum changes of additional pulse location relative to drive pulse. For lasing mode additional pulse is generated past main drive pulse and for lasing pulse suppression mode it is produced in advance of main drive pulse; in this case energy of additional pulse should be sufficient only for populating metastable laser levels of metal atoms. Pulse advance time and pulse delay time of additional pulse counted from origin of drive pulse should be lower than lifetime of metastable laser levels. Stabilization of plasma parameters is additionally corrected by varying advance time and delay time of additional pulse with respect to drive pulse. Device implementing this method has laser tube whose cathode and grounded anode are shorted out by inductance coil; resonator; two switches; two energy storage capacitors whose leads are integrated and connected to laser tube cathode; adjustable high-voltage power supply whose common lead is connected to grounded cathodes of switches; trigger pulse generator; two adjustable delay lines; two anode reactors; two pulse modulator drivers; nonadjustable delay line; electronic relay; controller. |
Method and device for exciting gas molecules and atoms / 2255398 Proposed method intended for exciting molecules and atoms of working gas includes voltage supply to electrodes and organization of working gas flow in discharge gap so that working gas flow is fully passed through cathode layer of volume glow discharge; gas flow organizing means is disposed upstream of cathode so that gas mixture flow is passed through cathode , interelectrode space, anode, and radiation generation working area. Device implementing this method has flow organizing means, power supply, working gas, and discharge chamber incorporating anode and cathode made in the form of grids; at least cathode grid has regular pitch not to exceed thickness of cathode layer of normal gas volume glow discharge; peripheral regions of device electrodes are separated and protected against breakdown by means of electric insulator; flow organizing means is disposed upstream of cathode. |
Method for transmitting optical pulses / 2262199 Method for transferring optical pulses by several laser beams includes forming a central laser beam and cover around it in form of tunnel. Tunnel is formed by one beam or a set of beams, contacting each other. Tunnel is made also with possible rotation relatively to central beam and consists of two portions, formed by set of oppositely directed beams. |
Method and device for forming powerful laser pulse / 2267197 Method and device can be used at powerful multichannel laser installations with radiation power level higher than 1012 W. Operation of laser is based upon forming of partially coherent laser pulse. Characteristics of laser pulse are specified by design mutual coherence function. Values of the function are necessary and sufficient for optimal matching of laser-target system. Device for forming powerful laser pulse has master oscillator, system for forming space-time characteristics of laser pulse and amplifiers. Amplifiers are disposed in sequence along rising cross-section of beam to be amplified correspondingly to space-angle distribution of radiation intensity. Distribution is matched with design function of mutual coherence. High uniformity intensity distribution is provided in focus of laser. |
Scheme of excitation of lasers on metal fume / 2269850 The scheme has n modules linked up to a power source through a charging inductance. Each module has one section of a multisectional high frequency transformer. Each section of the transformer has two primary windings coiled back-to-back and one secondary winding. Each module has also two accumulative condensers, two charging diodes and twp transistor commutators. The accumulative condenser is charged through a corresponding charging diode and a charging inductance from the power source and is discharged through corresponding transistor commutators and primary windings of the section of the multisectional transformer. The shutters of the transistor commutators are linked up through devices matching with the scheme of the starting. The secondary windings of all sections of the multisectional transformer are successively connected and linked up to the outputs of the gas discharge tube. |
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