Method for generating laser radiation in generator-amplifier system on metal vapour

FIELD: physics.

SUBSTANCE: according to the method for generating radiation in a laser generator-amplifier system of a metal-vapor, comprising an oscillator with an optical resonator and an amplifier made on active metal-vapor laser cells, spatial filtering of the generator radiation is performed with a spatial filter, an opaque plate is placed in the focal plane of the filter and an opening is formed in it by means of the generator's own radiation.

EFFECT: generating laser radiation in the generator-amplifier system at the level of diffraction divergence, reducing the system dimensions, reducing the complexity of manufacturing the diaphragm and its alignment.

2 cl, 3 dwg

 



 

Same patents:

FIELD: physics, optics.

SUBSTANCE: invention relates to laser engineering. The optical cavity of a radiator based on metal vapour and compounds thereof includes two or more coaxial gas-discharge tubes such that the cavity mirrors are optically coupled with each other through the volume of the gas-discharge tubes, each of said tubes having its own active medium based on metal vapour or compounds thereof, wherein the active media and materials of the exit mirror and the windows of the gas-discharge tubes are mutually transparent for the generated wavelengths, and the electrodes of each tube are electrically connected to the output of its pulsed high-voltage power supply.

EFFECT: increasing the number and range of generation wavelengths by using multiple active media in the optical cavity.

5 cl, 1 dwg

FIELD: physics.

SUBSTANCE: diode-pumped alkali metal vapour laser has a laser chamber with an inner cavity with transparent end windows, a sealed closed loop for circulating the active medium, passing through the inner cavity of the chamber in a direction which is transverse to the optical axis of the chamber, a laser diode-based pumping radiation source and optical means of forming and focusing pumping radiation into the inner cavity of the chamber. The active medium is a mixture of a buffer gas and alkali metal vapour. The pumping radiation source is placed on the side of the end window of the laser chamber such that the direction of the pumping radiation generated by the source is directed longitudinally relative the direction of the optical axis of the chamber. The optical means of forming and focusing pumping radiation are made and installed to form, in the active medium in the same plane which is transverse to the optical axis of the chamber, an image of the radiating area of the pumping radiation source in the direction of its short side and a Fourier image of the radiating area of the pumping radiation source in the direction of its long side.

EFFECT: providing more efficient conversion of pumping energy to laser energy and high efficiency of the laser.

5 cl, 3 dwg

Strontium laser // 2439763

FIELD: physics.

SUBSTANCE: laser contains a gas-discharge tube with a weighed amount of strontium metal inside and electrodes at its ends, an optical resonator with returning and transmitting mirrors, a laser radiation power metre and a computer-controlled pulsed current power supply. The power supply is connected by its positive terminal to one of the inputs of the computer. The returning mirror of the resonator is in form of a plate made from a substance which transmits radiation in the range of at least (1.03-3.1) mcm, for example monocrystalline calcium fluoride (CaF2) or barium fluoride (BaF2). One side of this plate is coated with a layer of a substance which reflects infrared radiation in the range of at least (1.03-3.1) mcm and has reflection coefficient not less than 90%. The layer of this substance is such that the returning mirror of the resonator allows transmission of (0.1-1.0)% of incident infrared radiation, and the other side of this plate is coated with a layer of a substance which selects infrared radiation in the (1.03-3.1) mcm range. The transmitting mirror is in form of a plate of monocrystalline calcium fluoride (CaF2) or barium fluoride (BaF2) and one side of this plate is coated with a layer of aluminium or silver whose thickness provides 50% transmission of infrared radiation. The radiation power metre is placed such that its optical input is connected to the returning mirror of the resonator and its electrical output is connected to one of the inputs of the computer.

EFFECT: reduced power loss of the generated radiation, high reliability and simple design.

5 cl, 1 dwg

FIELD: physics.

SUBSTANCE: laser active element has a vacuum airtight jacket with output windows on its faces and two electrodes on its ends. The electrodes are annular shaped and are placed coaxially on the ends of the vacuum airtight jacket and are insulated from the active medium by its walls. Metal pieces are placed inside the said jacket in the region of the working channel. The active element has a halogen generator for forming a metal halide in the working channel. The halogen generator is in form of an additional vessel whose inside is connected to the inside of the vacuum airtight jacket and is filled either with an adsorbent saturated with gaseous halogen, or a solid-phase halogen. The additional vessel lies in the region of the working channel of the vacuum airtight jacket and is in form of a cylindrical extension which is connected to the working channel by a branch from the vacuum airtight jacket.

EFFECT: easy operation and longer service life of metal halide vapour laser active elements.

9 cl, 4 dwg

FIELD: laser equipment engineering, possible use for creation and support of required concentration of halogen hydrogen in active area of gas-discharge tube.

SUBSTANCE: in accordance to method, adsorbent is used as source of halogen hydrogen. Adsorbent is positioned in vessel, having shared volume with working area of gas-discharge tube. Adsorbent is heated till reaching required concentration of halogen hydrogen in active area of gas-discharge tube. Gas-discharge laser tube on vapors of metal halogenide contains vacuum-dense cover. Cover is provided with two electrodes and contains working substance in working channel and additional vessel. Vessel is filled with adsorbent. Adsorbent is saturated with halogen hydrogen. Vessel has shared volume with active area of gas-discharge tube.

EFFECT: controlled concentration of halogen hydrogen in working area of gas discharge tube.

2 cl, 1 dwg

FIELD: the invention refers to laser technique.

SUBSTANCE: 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.

EFFECT: increases reliability of the scheme of excitation due to using of low voltage elements.

2 dwg

The invention relates to the field of quantum electronics and can be used in the development of metal vapor lasers and their compounds for medicine purposes, microelectronic technology, navigation, scientific research, atmospheric sounding

The invention relates to laser equipment, namely, metal vapor lasers

The invention relates to the field of quantum electronics and can be used in the development of vapor lasers chemical elements

FIELD: process engineering.

SUBSTANCE: invention relates to production of steel sheet articles from different-depth steel sheet or strips. Billets are welded together along the butt to get the weld (7) composed by edges of steel sheet or strip workpiece. To rule out loss of quenched structure produced by heating to austenitising temperature, at least one edge of sheet or strip (8, 9) is coated before welding with thick fluid or solid powder or aerosol-like matter including at least one component increasing the strength of the weld (10).

EFFECT: higher weld strength.

28 cl, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to machine for production of polar plates by laser cutting. This machine comprises bed, laser cutting assembly, cutting manipulator to drive laser cutting assembly, control system and at least one strip feeder. Strip feeder comprises manipulator for gripping, means for strip feeding to preset length and strip release means. Cutting and gripping manipulators are arranged at the bed. Means for strip feeding to preset length is arranged between gripping manipulator and strip release means. Control system is connected with cutting manipulator, gripping manipulator and means for strip feeding to preset length.

EFFECT: production of plates for lithium-ion storage batteries and super capacitors by laser technology, higher quality of plates.

10 cl, 5 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to laser plasma welding of metals and device to this end. Invention can be used for welding of such materials as steel and aluminium by combined laser plasma effects. Welding parts are preheated in the weld area by plasma flux. Laser beam is directed to but of welding parts. Produced weld is additionally heated by plasma flux. Plasma flux is shaped to circle while laser radiation is fed via geometrical centre of circular plasma flux to said butt. Device for laser plasma butt welding of metals comprises plasma flux and laser radiation sources. Plasma flux source comprises outer and inner ring electrodes to produce plasma flux located in one plane with their geometrical centres aligned at one point. Laser radiation source can feed laser radiation via said geometrical centre.

EFFECT: intensified welding, lower rate of weld cooling, higher strength of the weld.

2 cl, 1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates for surface processing to get glossy and dull sections. In compliance with this process, surface pre-coated with first copper ply and second ply including bottom nickel ply and top chromium ply is subjected to selective removal of chromium ply on sections to be frosted. Selective removal is performed by laser displaced above the surface. Note here that laser exposure and power are adjusted to get various texture. Then, ply of noncorrosive metal containing zirconium and chromium is evaporated from vapour phase on said surface.

EFFECT: production of glossy and frosted surface sections.

5 cl

FIELD: physics, optics.

SUBSTANCE: invention relates to a laser beam focusing head for laser cutting, a method and an apparatus for laser cutting of a metal component. The focusing head comprises a collimating lens (13) and a focusing lens (14). The collimating lens (13) and the focusing lens (14) are made of ZnS and have peripheral thickness of at least 5 mm. A deflecting mirror (15) operating at an inclination angle (α) from 40° to 50° is placed between the collimating lens (13) and the focusing lens (14) on the path of the laser beam. The laser cutting apparatus comprises a solid-state laser device (SL) emitting a laser beam with wavelength of 1.06 mcm to 1.10 mcm and power of 0.1 kW to 25 kW, said focusing head and a conveying fibre (CF) connecting the solid-state laser device (SL) and the focusing head.

EFFECT: invention provides a stable focusing position of a laser beam during cutting.

13 cl, 5 dwg, 1 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to welding of at least two components 102, 104 of super alloys. In compliance with this process, mail weld 110 if made with the use of the first filler metal arranged between said components 102, 104 and weld surface 112 with the use of second filler metal made over the main weld. Spacer 506 is fitted between said components provided with optional flute 105 made along the surface 114 of weld 102, 104. Filler wire 504 is fed over preset surface 114 or inside said optional flute 105. Two lasers 700, 702 or laser 600 with connected beam splitter 604 produce first and second laser beams 508, 510. Said beams are directed at focus points 5122, 514 spaced apart through preset spacing (509), for example, 0.05-1.5 cm. First laser beam 508 is used for making of the main weld 110 with the help of fist filler metal between components 102, 104. Second laser beam 510 is used for making of the surface weld 112 with the use of second filler metal on the surface of the main weld 110.

EFFECT: perfected method.

9 cl, 8 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to production of pipes by laser welding. Laser welding comprises emitting of two laser beams along edges at open pipe upper surface. Said laser beams are transmitted via different optical fibre glass and have focused spots of diameters making over 0.3 mm. Said laser beams are emitted so that front laser beam and rear laser beam are inclined to welding direction. Note here that incidence angles are defined relative to direction perpendicular to open pipe top surface. Front laser beam falls on open pipe top surface in welding direction before rear laser beam while the letter falls on open pipe top surface in welding direction after front laser beam. Front laser beam incidence angle is set larger than that of rear laser beam. Gap between front laser beam centre and that of rear laser beam is set at open pipe rear surface equal to 1 mm and more.

EFFECT: higher quality of weld, higher yield.

17 cl, 4 dwg, 3 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: temporary beads 3 and 4 are made on thick 2 and thin 1 parts. The bead 3 height is by 3-4 times higher than thickness of part 1. Height of bead 4 is equal to height of bead 3. Bead 4 thickness is determined by equation S2=(1+Δ)·S1. Beads 3 and 4 contact surface is treated by ultrasound in ethyl alcohol. Parts 1 and 2 are secured in welding fixture. Butt joint gap and beads 3 and 4 shift at least 10% of part 1 thickness are ensured. Laser beam 5 is directed to butt joint of beads 3 and 4.

EFFECT: invention increases weld strength due to rational design of the temporary beads.

3 cl, 4 dwg

FIELD: metallurgy.

SUBSTANCE: device to manufacture items by layer-by-layer laser agglomeration of powders contains tanks for powder and powder surpluses, located between them module for item forming including table with drive of its vertical movement, device for powder supply to the table from powder tank, and powder discharge to power surpluses tank, optical laser system for agglomeration of the powder nozzles installed above the table for air or inert gas supply on the powder layer, and gas intake installed under the table with possibility of connection with vacuum system. The table is made gas permeable and is equipped with installed on its top surface of the refractory gas permeable plate intended for powder layer arrangement on its surface and agglomeration.

EFFECT: improved quality of obtained items.

1 dwg

FIELD: machine building.

SUBSTANCE: module comprises a guide belt, a movable orbital carriage mounted on the guide belt and able of travelling along it. The carriage includes a longitudinal movement drive and a moving device consisting of a carrying roller system and a gear wheel. A joint monitoring sensor, a welding wire reeling device and a handler are installed on the carriage. The handler consists of two mutually perpendicular linear guides with motors, which can move in respect to each other. The transverse linear guide is equipped by a laser welding head, a wire feeding unit, an arc welding torch, a video camera and a controller.

EFFECT: invention allows for the increase of productivity and efficiency of welding process for fixed ring pipe joints and for the improvement of welded joint quality.

3 cl, 3 dwg

FIELD: systems for cleaning rigid surfaces.

SUBSTANCE: in order to improve quality of cleaning, surface is irradiated by means of space-modulated beam of laser irradiation.

EFFECT: improved quality of cleaning surfaces.

1 cl, 2 dwg

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