28 results about "Gas laser" patented technology

The invention relates to the technical field of lasers, and discloses a corona-based creeping spark discharge strong pre-ionization pulse gas laser which comprises a main frame chamber, a pre-ionization device is fixedly mounted at the top of an inner cavity of the main frame chamber, a cathode electrode is arranged at the top of the inner cavity of the main frame chamber, and a connecting copper sheet is fixedly mounted on the lateral upper portion of the inner wall of the main frame chamber. A flow guide plate is fixedly installed on the connecting copper sheet, and an anode electrode is fixedly installed at the top end of the flow guide plate. A corona-based creeping spark discharge strong pre-ionization pulse gas laser is characterized in that a pre-ionization area can be formed on a pre-ionization device and structures on the pre-ionization device, electrons in the pre-ionization area move in an accelerated manner under the action of electric field force, and in the movement process, the electrons in the pre-ionization area are separated from the pre-ionization device. And the electrons and other gas particles are subjected to inelastic collision and ionization or excitation, so that high-concentration and uniform initial electrons are generated, a micro-discharge channel is formed, and continuous seed electrons are provided for a core discharge region of the micro-discharge channel.

The invention relates to the technical field of high-power design in gas lasers, in particular to a folded tube which comprises a plurality of laser tubes which are arranged side by side and connected in series through U-shaped elbows. The number of the laser tubes is at least three, each laser tube makes contact with the side walls of at least two laser tubes, and every two adjacent laser tubes making contact with each other are fixedly connected. The natural stability of the triangle is utilized, the torsion resistance of the single laser tube and the overall rigidity of the folding tube are improved, and the transportation stability and the vibration resistance are remarkably improved.

The invention relates to a high-frequency power coupler (1) for coupling a plurality of HF input signals in order to form an HF output signal for outputting HF power to an industrial process assembly (100), preferably a plasma process assembly, gas laser excitation, or heating assembly, the HF power coupler having: a. a plurality of HF inputs (11, 12, 13, 14, 15), b. an HF output (7), c. a coupling unit (19), d. an impedance matching line (20) which extends from the coupling unit (19) to the HF output (7) and has a length which is designed to bring about an impedance matching function between the output of the coupling unit and the HF output, and e. an upper mounting plate (23), a middle mounting plate (25), and a lower mounting plate (27), the middle mounting plate (25) being provided between the upper and the lower mounting plate, wherein f. the impedance matching line (20) is provided between the upper and the middle mounting plate and between the lower and the middle mounting plate.

This application relates to the field of laser technology and discloses a corona-based surface spark discharge high-intensity pre-ionization pulsed gas laser, including a main frame chamber. A pre-ionization device is fixedly installed on the top of the main frame chamber, and a cathode electrode is provided on the top of the main frame chamber. A connecting copper plate is fixedly installed on the upper side of the inner wall of the main frame chamber, and a guide plate is fixedly installed on the connecting copper plate. An anode electrode is fixedly installed on the top of the guide plate. In this corona-based surface spark discharge high-intensity pre-ionization pulsed gas laser, the pre-ionization device and its structure can form a pre-ionization region on the pre-ionization device. Under the action of an electric field, electrons in the pre-ionization region accelerate. During this motion, electrons collide with other gas particles inelastically and undergo ionization or excitation, thereby generating a high-concentration and uniform initial electron and forming a micro-discharge channel, providing a continuous supply of seed electrons to its core discharge region.

The utility model relates to the technical field of gas lasers, in particular to a folding tube reflecting seat, an adjustable reflecting mirror seat system and a multi-folding laser. According to the utility model, the annular boss is arranged at the beveled elliptical interface, the inner side via hole is arranged to have a circular cross section, and the top edge of the via hole is arranged to have an inward concave cambered surface along the annular direction, so that the annular boss and a reflector seat are assembled and installed; an interface matched with the reflector seat is changed from an ellipse to a perfect circle, and is processed on a circular outline, so that compared with the ellipse, the processing difficulty of the interface is reduced, the processing of the top cambered surface of the interface is more convenient, the contact gap between the circular cambered surface and the reflector seat is more uniform, and the sealing performance is better; the concave cambered surface arranged on the annular boss can form a two-dimensional angle-adjustable structure with the plane fitting edge of the existing reflector seat, and can also form a three-dimensional angle-adjustable structure with the spherical fitting edge of the existing reflector seat, so that the debugging is convenient, the grinding amount is small, and the debugging efficiency is favorably improved.

The invention discloses a high-power mid-infrared nanosecond pulse hollow-core optical fiber gas laser. Pump light of a pumping source is output to a lens through an optical fiber. The lens comprises a plano-convex lens and a reflecting mirror which are in primary light path connection, and the reflecting mirror and the plano-convex lens focus the pump light; and the gas chamber A is used for loading the hollow-core anti-resonance optical fiber and filling gas. And the focused pump light is coupled into the hollow-core anti-resonance optical fiber through the window. And the gas chamber B is used for loading the hollow-core anti-resonance optical fiber and sealing the gas. And the intermediate infrared band-pass optical filter of the intermediate infrared band-pass optical filter is placed at the tail end of the hollow-core optical fiber and is used for filtering residual pump light. By combining the double advantages of the hollow-core optical fiber and the traditional gas laser, the laser has the characteristics of abundant emission wavelength, high output power, good light beam quality and the like; the method has important application in the fields of military photoelectric countermeasure, laser medical treatment, trace gas detection and the like.

RF power coupler (1) for coupling several RF input signals to one RF output signal, for supplying RF power to an industrial process arrangement (1), preferably a plasma process arrangement, gas laser excitation or heating arrangement, wherein the RF power coupler (1) comprises: a. several RF inputs (11, 12, 13, 14, 15), b. an RF output (17) with a specified RF output impedance (88), c. an impedance matching line (20), d. a coupling unit (19) with a predetermined coupling unit output impedance (81), wherein the coupling unit (19) has: i. a common star point (10), ii. one connection each for one of the RF inputs, iii. each a connecting line (41, 42, 43, 44, 45) extending from each of the terminals of the RF inputs to the common star point (10), wherein the connecting lines each have a connecting line reactance (21), and • wherein the impedance matching line (20) is connected to the star point (10) of the coupling unit (19) and extends from the coupling unit (19) to the RF output (17) and has a predetermined length and impedance between these two ends, • where the specified length differs from a λ / 4 length by a difference length (22), • where the specified impedance differs from a calculated impedance by a differential impedance (26), • where the difference length (22) and the difference impedance (26) each depend on the reactance resulting from the connecting line reactances.

A method for producing a security element (01) or a security document (02) having a printed image (27), in which several image elements (28) of the printed image (27) are formed by applying printing ink to a substrate (26), in which the previously applied printing ink is removed from at least one selected location of a selected image element (28) of the printed image (27) by means of a laser beam (66) emanating from a laser (63), wherein the laser (63) is operated in pulsed mode, characterized in that a gas laser is used as the laser (63), wherein the laser (63) is operated with a pulse duration in the range between 1 ns and 40 ns, wherein a structure with a width in the range between 0.25 µm and 1 µm is formed in the selected image element (28) of the printed image (27) with the laser beam (66).wherein the at least one image element (28) with the at least one area to be freed from printing ink is formed in white printing ink.

The application discloses a kind of based on optical frequency comb two-stage modulation absorption spectrum gas detection system and method, facing multi-component gas sensing needs, with optical frequency comb ultrafast pulse as switch modulation, with ultra-narrow linewidth phase shift grating by PZT micro-displacement device selectively implement target waveband narrowband wavelength tuning for specific probe gas, realize the high sensitivity detection of gas concentration, with the characteristics of strong detection specificity, wide broadband spectrum gas coverage, overcome the limitation of traditional TDLAS technology multi-component gas sensing technology, solve the existing optical frequency comb broadband spectrum detection existing system optical path structure complex, long time continuous detection stability requirement is extremely high, broadband spectrum scanning efficiency is low and noisy, easily interfered by low frequency etc., realize high sensitivity, multi-component gas laser spectrum detection.

This invention relates to the field of waveguide gas laser technology, specifically to a method and device for preferentially controlling the electrode electric field to prioritize the lowest-order waveguide mode through coating, comprising the following steps: S1: determining the beam waist position of the laser resonator; S2: preparing an insulating coating on the surface of the waveguide laser electrode plate corresponding to the beam waist position; S3: performing a gradient transition edge treatment on the insulating coating; S4: constructing an impedance matching compensation network at the electrode feed end in the insulating coating region. This invention, by setting an insulating coating, achieves localized reduction of the electric field intensity in the beam waist region; simultaneously, by constructing an impedance matching compensation network, it accurately compensates for the capacitance effect introduced by the coating, and through dynamic monitoring and adjustment, ensures that the standing wave ratio and discharge voltage fluctuations are within a minimal range, guaranteeing effective coupling of RF power and uniform and stable discharge, thereby improving the overall efficiency and reliability of the device.

The application relates to a kind of optically pumped metastable noble gas lasers using laser-induced preionization, wherein a sample cell is arranged inside a noble gas metastable preparation chamber, a radio frequency electrode and a grounded electrode are arranged inside the noble gas metastable preparation chamber, the sample cell is arranged between the radio frequency electrode and the grounded electrode, a pump light source and a preionization light source are arranged outside the noble gas metastable preparation chamber, and the pump light source and the preionization light source are arranged to emit light perpendicularly and orthogonally to the sample cell, a first mirror is arranged between the pump light source and the noble gas metastable preparation chamber, a second mirror is arranged on the side of the noble gas metastable preparation chamber away from the pump light source, a lens is arranged between the preionization light source and the noble gas metastable preparation chamber, and a heating device is arranged outside the noble gas metastable preparation chamber. The application can quickly generate high-concentration metastable atoms based on laser-induced preionization and electron collision accelerated by an external electric field, and can directly avoid the problem of serious electromagnetic interference caused by the generation of metastable atoms in the traditional discharge mode at the mechanism level.

The disclosure provides a method for heat mitigation in gas-filled hollow-core fibers such as used for gas lasers and a determination of the temperature reduction in the fibers that affects the maximum output power at which gas lasers can operate. A temperature reduction can be achieved by using a differential pressure between the inlet and outlet of the gas-filled hollow-core fiber lasers. The method uses coupled modeling of a gas flow model adapted to compressibility principles rather than the traditional incompressibility principles. The results of the adapted compressible gas flow model are transferred to the heat transfer model and the results of the heat transfer model is transferred iteratively to the compressible gas flow model until there is a predetermined amount of convergence. The convergence approximates a self-consistent stationary solution of operability for the given conditions. The solution can result in manufacturing and operational improvements of hollow-core gas filled lasers.

High-frequency power coupler (1) for coupling several RF input signals to one RF output signal, for supplying RF power to an industrial process arrangement (1), preferably a plasma process arrangement, gas laser excitation or heating arrangement, wherein the RF power coupler (1) comprises: a. several RF inputs (11, 12, 13, 14, 15), b. an RF output (17), c. a coupling unit (19), d. an impedance matching line (20) which extends from the coupling unit (19) to the RF output (17) and has a predetermined length between these two ends, e. wherein the impedance matching line (20) has a branch line (50) with open-circuit termination, such that this impedance matching line (20) is designed to effect a predetermined impedance matching from the output of the coupling unit (19) to the RF output (7), f. where the given length is less than λ / 6 and greater than λ / 10.

High-frequency power coupler (1) for coupling several RF input signals to one RF output signal, for supplying RF power to an industrial process arrangement (100), preferably a plasma process arrangement, gas laser excitation or heating arrangement, wherein the RF power coupler comprises: a. several RF inputs (11, 12, 13, 14, 15), b. an RF output (7), c. a coupling unit (19), d. an impedance matching line (20) extending from the coupling unit (19) to the RF output (7) and having a length designed to effect an impedance matching from the output of the coupling unit to the RF output, e. an upper mounting plate (23), a middle mounting plate (25) and a lower mounting plate (27), wherein the middle mounting plate (25) is arranged between the upper and the lower mounting plate and f. wherein the impedance matching line (20) is arranged between the upper and middle mounting plates and between the lower and middle mounting plates.

This application discloses an all-solid-state active laser gyroscope and its measurement method. The technical solution provided by this application uses a millimeter-scale single non-planar ring cavity as the resonant cavity, which has a compact structure and advantages such as structural stability and minimal influence from external environmental factors such as air pressure and temperature. Compared with the disadvantages of existing helium-neon gas laser gyroscopes, which are large in size and difficult to integrate, the laser crystal used in this gyroscope is only on the millimeter scale, which can achieve miniaturized integration and assembly. Moreover, it can avoid the lock-up effect without using complex technical solutions such as mechanical dithering or four-frequency differential, and can achieve measurement of low speed.

The invention discloses a fully mechanized coal mining face gas laser sensor distribution method, which relates to the technical field of gas laser sensors, and comprises the following implementation steps: constructing a three-dimensional simulation model, constructing the three-dimensional simulation model through FLUENT, carrying out field measurement on site, and carrying out gas laser sensor distribution. Analyzing methane and dust concentration distribution rules under different wind speeds, humidity and spatial positions, analyzing methane and dust concentration distribution rules under different wind speeds, humidity and spatial positions, and further determining dynamic diffusion characteristics of high-risk areas such as an upper corner and the like; discretizing a working face, discretizing the working face into 294 grid units, introducing multiple constraint conditions such as wind speed, humidity and concentration variance (less than or equal to 0.02), and constructing a multi-objective optimization model; and generating a non-dominated solution set, comprehensively evaluating and screening an optimal point distribution scheme through entropy weight TOPSIS, and generating the non-dominated solution set.

The invention discloses a particle gas laser composite detection decoupling and anti-interference method, and relates to the technical field of detection. The particle gas laser composite detection decoupling and anti-interference method comprises the following steps: acquiring a transmission light signal and a scattered light signal through a smog gas composite detector; obtaining the smoke concentration according to the scattered light signal, and constructing a target feature vector based on the transmission light signal and the scattered light signal; and obtaining the final concentration and smoke category of the target gas based on the target feature vector by using a pre-trained multi-task learning model. Therefore, accurate detection of the smoke concentration, the smoke category and the target gas concentration can be realized.

This application discloses an automatic gas replenishment control device for a gas laser, belonging to the field of laser technology. The gas replenishment system includes a first solenoid valve and a second solenoid valve, respectively located between a second gas cylinder and the cavity, and between a first gas cylinder and the cavity; the pressure maintenance system includes a third solenoid valve and a vacuum pump; the control and monitoring system includes a laser control board, which is electrically connected to a pressure sensor, each solenoid valve, and the vacuum pump. The laser control board is configured to acquire the cumulative number of discharge pulses and calculate the theoretical gas replenishment amount; during laser downtime, control the gas replenishment system to activate the corresponding solenoid valve to replenish gas according to the theoretical replenishment amount, and after replenishment, determine the replenishment status based on the deviation between the actual gas pressure increment and the theoretical replenishment amount; and control the pressure maintenance system to pump gas to a second threshold based on the total gas pressure, maintaining the total gas pressure within a preset working pressure range. This application achieves precise automatic gas replenishment, with advantages of high replenishment accuracy and high reliability.

A laser pumping method includes pumping a gas laser medium in a laser chamber by heating electrons in the gas laser medium with electromagnetic radiation from an electromagnetic source, resulting in populating the upper laser level. Electron density in a plasma formed in the gas laser medium is generated and controlled with an electron source that is internal or external to the laser chamber. A high-power excimer laser includes a laser chamber containing a high-power gas laser medium, a pulsed electromagnetic source configured to heat free electrons in the laser medium and thereby generate laser emissions from the gas laser medium, and a pulsed electron source configured to generate free electrons and control the electron density in the gas laser plasma medium.

The invention provides a single-longitudinal-mode hollow-core optical fiber gas laser and an operation method. The single-longitudinal-mode hollow-core optical fiber gas laser comprises a tunable pumping source, a first annular resonant cavity structure arranged on the outer side of the tunable pumping source and a gas filling and vacuumizing system connected with the inner side of the first annular resonant cavity structure. The tunable pumping source controls the output wavelength of the pumping seed source through the direct-current power supply so as to be matched with the absorption wavelength of the gain gas and output pumping light; a first air chamber and a second air chamber in the first annular resonant cavity structure are arranged on the five-dimensional adjusting frame, and the first annular resonant cavity structure is used for generating single longitudinal mode laser; and the gas filling and vacuumizing system is used for performing vacuumizing and gain gas filling on the hollow-core optical fiber in the first annular resonant cavity structure. Through the annular resonant cavity structure and the cavity length design, intermediate infrared single longitudinal mode laser can be effectively generated.

The invention discloses a tube wall cooling structure of an optical pump terahertz laser, and belongs to the technical field of optical pump terahertz lasers, and the tube wall cooling structure comprises a cooling fan, an aluminum alloy fixing plate, cooling fins, a semiconductor chilling plate and a laser tube cooling clamp. The zero load of a single module can reach-10 DEG C when the environment is 25 DEG C, the power supply voltage is 24VDC, the maximum power is 120W, and the maximum refrigerating capacity is 80W. According to the terahertz gas laser, the problem that the temperature of the tube wall of the laser changes slowly is solved, the influence of the temperature change of the tube wall on the power and frequency stability of the laser when the terahertz gas laser works is reduced, the whole system is small in size and compact in structure, a large-size and heavy-weight water cooling machine is not needed, and integration and miniaturization development of the terahertz gas laser is facilitated.

The utility model relates to the technical field of dust particle counters, and discloses a high-pressure special gas laser dust particle counter which comprises a shell, a spherical buffer box is installed in the shell, the upper portion of the buffer box is fixedly connected with a gas inlet pipe for conveying high-pressure special gas, the side face of the buffer box is fixedly connected with an exhaust pipe, and the exhaust pipe is fixedly connected with a gas outlet pipe. The end of the exhaust pipe is fixedly connected with an exhaust valve port, and the bottom end of the interior of the buffer box is fixedly connected with an inner limiting plate. According to the laser dust particle counter for the high-pressure special gas, the buffer box is designed to be spherical, when the gas inlet pipe drives the high-pressure special gas to be conveyed into the buffer box, the buffer box effectively buffers the conveyed gas, and meanwhile, the conveyed gas is buffered through the buffer structure shell; and therefore, when the high-pressure special gas is conveyed into the buffer tank, the damage to the internal structure of the buffer tank caused by ultrahigh pressure can be reduced, and the service life of equipment is prolonged.

A system and method for adjusting a target temperature of a gas chamber in a laser apparatus comprises monitoring performance parameters of the laser and updating the target temperature based on the results of such monitoring. The target temperature may be incrementally increased or decreased to optimize the laser gas temperature. Such optimization may improve performance, reduce errors, and reduce water consumption of resources in a cooling system.

The invention relates to an HF power coupler (1) for coupling a plurality of HF input signals in order to form an HF output signal for outputting HF power to an industrial process assembly (1), preferably a plasma process assembly, gas laser excitation, or heating assembly, the HF power coupler (1) having: a. a plurality of HF inputs (11, 12, 13, 14, 15), b. an HF output (17) having a specified HF output impedance (88), c. an impedance matching line (20), and d. a coupling unit (19) having a specified coupling unit output impedance (81), the coupling unit (19) having: i. a common star point (10), ii. a respective connection for each of the HF inputs, and iii. a respective connecting line (41, 42, 43, 44, 45) extending from each of the connections of the HF inputs to the common star point (10), each connecting line having a connecting line reactance (21), wherein - the impedance matching line (20) is connected to the star point (10) of the coupling unit (19) and extends from the coupling unit (19) to the HF output (17) and has a specified length and a specified impedance between the aforementioned two ends, - the specified length differs from a ʎ / 4 length by a differential length (22) - the specified impedance differs from a calculated impedance by a differential impedance (26), and - the differential length (22) and the differential impedance (26) are each based on the reactance resulting from the connecting line reactances.

The application discloses an array discharge element and an array electrode type pulse discharge gas laser. The array discharge element comprises a metal substrate, a plurality of unit electrodes and a plurality of pre-ionization needles. The metal substrate is provided with a plurality of electrode mounting holes arranged in an array. The unit electrodes are correspondingly mounted in each electrode mounting hole. The pre-ionization needles are correspondingly sleeved at the inner central positions of the unit electrodes. The gas laser comprises the array discharge element, a peaking capacitor, a plurality of energy storage capacitors and a ground electrode. The discharge element is connected with the plurality of energy storage capacitors in correspondence. One end of the peaking capacitor is connected with the discharge element, and the other end is connected with the ground electrode. The pre-ionization needles are uniformly distributed on the electrode plane, so that the ionization charges of the electrode space are more uniformly distributed, the effect of overall uniform pre-ionization is achieved, and the uniform main discharge is facilitated.

The application discloses a kind of based on energy-saving jet plasma high-efficiency gas laser pumping system, including optical resonator unit, double excitation unit, energy supply unit, circulation voltage stabilizing unit and laser detection unit;Optical resonator unit includes airtight chamber and the laser resonator supported in airtight chamber;Double excitation unit includes plasma jet device and semiconductor laser device, plasma jet device is used to form jet zone in the middle part of laser resonator;Energy supply unit is used to provide working medium to plasma jet device and is used to provide the electric field condition satisfying plasma discharge;Circulation voltage stabilizing unit is communicated with airtight chamber, so that the environment in airtight chamber is always in stable voltage state;Laser detection unit is arranged outside optical resonator unit.The application relates to the technical field of plasma laser pumping, by the above setting, to realize the function of energy-saving, efficient, self-cooling and prolonging service life.

RF power coupler (1) for coupling several RF input signals to one RF output signal, for supplying RF power to an industrial process arrangement (1), preferably a plasma process arrangement, gas laser excitation or heating arrangement, wherein the RF power coupler comprises: a. several RF inputs (11, 12, 13, 14, 15), b. an RF output (17), c. a coupling unit (19), d. an impedance matching line (20) which extends from the coupling unit (19) to the RF output (17) and has a predetermined length between these two ends, e. an upper mounting plate (23) and a lower mounting plate (27), f. wherein the impedance matching line (20) is arranged between the upper and the lower mounting plate, g. wherein an insulating layer (29) is provided between the impedance matching line (20) and one of the mounting plates (23, 27), in particular both mounting plates (23, 27), wherein a thermally conductive, pasty intermediate layer (28) is arranged between the insulating layer (29) and one of the mounting plates (23, 27), in particular both mounting plates (23, 27), so that the impedance matching line (20) with the insulating layers (29) arranged on both sides is arranged floatingly between the mounting plates (23, 27).

The invention relates to a high-frequency power coupler (1) for coupling a plurality of HF input signals in order to form an HF output signal for outputting HF power to an industrial process assembly (1), preferably a plasma process assembly, gas laser excitation, or heating assembly, the HF power coupler (1) having: a. a plurality of HF inputs (11, 12, 13, 14, 15), b. an HF output (17), c. a coupling unit (19), and d. an impedance matching line (20) which extends from the coupling unit (19) to the HF output (17) and, for this purpose, has a specified length between the two ends, wherein e. the impedance matching line (20) has a branching line (50) with no-load termination such that the impedance matching line (20) is designed to bring about a specified impedance matching function between the output of the coupling unit (19) and the HF output (7), and f. the specified length is less than ʎ / 6 and greater than ʎ / 10.