CN115483596B - Laser based on alkali metal vapor and buffer gas filling and application thereof - Google Patents
Laser based on alkali metal vapor and buffer gas filling and application thereof Download PDFInfo
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- CN115483596B CN115483596B CN202211301625.2A CN202211301625A CN115483596B CN 115483596 B CN115483596 B CN 115483596B CN 202211301625 A CN202211301625 A CN 202211301625A CN 115483596 B CN115483596 B CN 115483596B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/03—Constructional details of gas laser discharge tubes
- H01S3/031—Metal vapour lasers, e.g. metal vapour generation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/03—Constructional details of gas laser discharge tubes
- H01S3/036—Means for obtaining or maintaining the desired gas pressure within the tube, e.g. by gettering, replenishing; Means for circulating the gas, e.g. for equalising the pressure within the tube
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/0943—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a gas laser
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/22—Gases
- H01S3/227—Metal vapour
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention provides a laser filled with alkali metal vapor and buffer gas and application thereof. The laser generating device is provided with the magnetic suspension blower with the temperature control component, so that the contact between the blower and alkali metal is reduced, the aggregation of the alkali metal in the blower is reduced, the normal operation of the blower is ensured, and the high-efficiency and high-power laser output of the laser is realized; the recovery rate and recovery rate of alkali metal vapor are also improved. According to the invention, the filling device is coupled with the laser generating device, so that the laser generating device is conveniently filled with high-purity buffer gas and alkali metal gain medium continuously, and the working efficiency of the laser is improved; and the alkali metal in the laser generating device is completely recovered, so that the high-efficiency recycling of the alkali metal is realized, and the high-efficiency recycling method has higher economic benefit.
Description
Technical Field
The invention relates to the technical field of high-power lasers, in particular to a laser filled with alkali metal vapor and buffer gas and application thereof.
Background
A semiconductor pumped alkali metal vapor laser (DPAL) is a gas laser that uses alkali metal atom saturated vapor as a gain medium, and uses a semiconductor laser as a pumping source, and uses the energy level transition of the outermost valence electron of the alkali metal atom to realize light. The laser has the advantages of high power output of a semiconductor laser and gas medium flowing heat dissipation, has the advantages of high quantum efficiency, good beam quality, compact structure, large absorption section, unobvious thermal management problem and the like, is an effective path leading to the high-efficiency, electrically-driven and low-quality high-power laser, has high power scaling and amplifying capability, has wide application prospect in the fields of aerospace, military and the like, and is positioned as a preferred scheme of the high-power laser in the future.
Circulating flow DPAL has been developed at a significant power level, but there are a number of technical difficulties and limitations at the same time: firstly, alkali metal vapor and buffer gas have complex filling procedures, and the laser is required to stop working when the buffer gas is replaced, so that the further improvement of the working efficiency of the laser is limited; secondly, along with long-time operation, buffer gas is reduced due to air leakage of the circulating pipeline, the buffer gas needs to be replaced, alkali metal can be polluted in the replacement process, the alkali metal needs to be refilled, and the cost is high; and thirdly, the circulating pipeline is communicated with the rotating shaft part of the fan, the temperature of the fan part is lower than that of the pipeline, and along with long-time operation of alkali metal laser, alkali metal can be gathered in the rotating shaft of the fan, so that on one hand, the alkali metal is consumed, and on the other hand, the normal operation of the rotating shaft of the fan is influenced.
In the prior art, the invention patent (application number is CN 202110860587.3) discloses a laser diode pumping axial alkali metal vapor laser and a laser generating method, wherein the laser comprises a circulating flow passage structure, an alkali metal evaporation collector, a circulating flow passage, a temperature control ring, a driving device, a pumping structure and other main devices, wherein the circulating flow passage is internally provided with pre-filled buffer gas, so that the alkali metal vapor can absorb pumping light better; although the alkali metal evaporation collector is arranged in the laser device and can be used for evaporating and collecting alkali metal, the circulating flow passage is provided with a fan and other complex devices, the ambient temperature of the device is lower than that of other parts of the circulating flow passage, and alkali metal vapor is easy to collect at the position, so that the alkali metal vapor is difficult to collect completely; the buffer gas in the circulating flow channel is pre-filled, and the laser is still required to be stopped when the buffer gas is replaced, so that the working efficiency of the laser is reduced, alkali metal pollution in the alkali metal evaporation collector is caused, the alkali metal is required to be replaced again, and the economic benefit is low.
In view of the foregoing, there is a need for an improved alkali vapor and buffer gas filling-based laser and application thereof that addresses the above-described problems.
Disclosure of Invention
The invention aims to provide a laser based on alkali metal vapor and buffer gas filling and application thereof, and the filling device and the laser generating device are coupled, so that the laser generating device can be conveniently and continuously filled with high-purity buffer gas and alkali metal gain medium, and the alkali metal vapor in the laser generating device is completely recovered, thereby realizing high-efficiency recycling of the alkali metal vapor, saving cost and having higher economic benefit.
In order to achieve the aim, the invention provides a laser filled with alkali metal vapor and buffer gas, which comprises a filling device and a laser generating device, wherein the filling device is connected with the laser generating device through a detachable high-vacuum flange, and the filling device provides an alkali metal source and buffer gas for the laser generating device;
the laser generating device comprises an alkali metal source storage chamber, a magnetic suspension blower with a temperature control component, a laser generating chamber and a circulating pipeline for connecting the three;
the alkali metal source storage chamber is provided with a heating and refrigerating system and two outlets, the two outlets are respectively communicated with the circulating pipeline and the filling device, and a first gate valve and a second gate valve are respectively arranged between the alkali metal source storage chamber and the circulating pipeline and between the alkali metal source storage chamber and the filling device so as to control filling, evaporation and recovery of alkali metal.
As a further improvement of the invention, the magnetic suspension blower comprises a power assembly and a sealing cylinder arranged outside the power assembly, wherein the sealing cylinder is connected with the circulating pipeline through a flange interface to form a closed system; the inner side of the sealing cylinder is provided with a heating temperature control component, and the heating temperature control component wraps the power component, so that the temperature of the power component is higher than the temperature of the circulating pipeline in the working process of the laser generating device.
As a further improvement of the invention, the filling device comprises an alkali metal filling unit and a buffer gas filling unit connected with the alkali metal filling unit through a pipeline, wherein a first stop valve is arranged between the alkali metal filling unit and the buffer gas filling unit; the alkali metal filling unit is connected with the laser generating device through the detachable high-vacuum flange.
As a further improvement of the present invention, the alkali metal filling unit includes an alkali metal source supply bottle, and a heating device is arranged outside the alkali metal source supply bottle for converting the alkali metal into vapor and supplying the vapor to the laser generating device; and a third gate valve, a flange and a fourth gate valve are sequentially arranged on a connecting passage of the alkali metal source supply bottle and the detachable high-vacuum flange.
As a further improvement of the invention, the buffer gas filling unit comprises a vacuum pump set, at least one group of gas supply and purification components and a gas mixing cavity connected with the gas supply and purification components; the gas supply and purification assembly is connected with the vacuum pump set through a pipeline, and a second stop valve is arranged between the gas supply and purification assembly and the vacuum pump set.
As a further improvement of the invention, the power assembly comprises a main shaft, a rotor combination arranged at the periphery of the main shaft and an impeller connected with the main shaft; the impeller extends into the circulation duct for driving the flow of the alkali metal vapor and buffer gas within the circulation duct.
As a further improvement of the invention, the circulating pipeline is provided with a pipeline heating temperature control device, and the heating temperature control is carried out on the circulating pipeline in the working process of the laser generating device.
As a further improvement of the invention, the gas supply and purification assembly comprises a gas storage bottle and a gas purification column which are sequentially communicated, and the gas purification column is connected with the gas mixing cavity through a one-way valve; a pressure regulating valve and a gas mass flowmeter are arranged between the gas storage bottle and the gas purifying column.
Use of an alkali metal vapor and buffer gas filled laser according to any of the preceding claims, comprising the steps of:
s1, providing buffer gas and alkali metal source for a laser generating device by a filling device, wherein the alkali metal source enters an alkali metal source storage chamber of the laser generating device, the buffer gas enters a circulating pipeline, and a second gate valve between the alkali metal source storage chamber and the filling device is closed;
s2, opening a pipeline heating temperature control device to heat the circulating pipeline, opening a heating temperature control component to heat a magnetic suspension blower, opening a heating refrigerating system to heat the alkali metal source storage chamber, converting alkali metal in the alkali metal source storage chamber into alkali metal vapor, and entering the circulating pipeline; the heating temperature of the heating temperature control component is 5-10 ℃ higher than that of the pipeline heating temperature control device;
s3, turning on the magnetic suspension blower to enable the buffer gas and the alkali metal vapor to circulate in the circulating pipeline; starting a laser generation chamber to enable the laser generation chamber to perform light emitting work;
s4, after the laser stops working, the heating and refrigerating system cools the alkali metal source storage chamber, and meanwhile, the heating and temperature controlling assembly and the pipeline heating and temperature controlling device continue to heat the magnetic suspension blower and the circulating pipeline respectively, so that alkali metal vapor is recovered and enters the alkali metal source storage chamber.
As a further improvement of the present invention, in step S1, the filling means provides the laser generating means with an alkali metal source of: firstly, closing a first gate valve between the alkali metal source storage chamber and the circulating pipeline, and closing a first stop valve between an alkali metal filling unit and a buffer gas filling unit; then the heating device outside the alkali metal source supply bottle is turned on, alkali metal in the heating device is changed into alkali metal vapor to enter the alkali metal source storage chamber, and the alkali metal source is transferred.
The beneficial effects of the invention are as follows:
1. the invention relates to a laser filled with alkali metal vapor and buffer gas, which comprises a filling device and a laser generating device, wherein the filling device is connected with the laser generating device through a detachable high-vacuum flange, and the filling device provides an alkali metal source and buffer gas for the laser generating device. According to the invention, the filling device is coupled with the laser generating device, so that the laser generating device is conveniently filled with high-purity buffer gas and alkali metal gain medium continuously, and the working efficiency of the laser is improved; and the alkali metal vapor in the circulating pipeline of the laser generating device is completely recovered, so that the high-efficiency recycling of the alkali metal vapor is realized, the cost is saved, and the method has higher economic benefit.
2. The invention selects the magnetic suspension blower with the temperature control component in the laser generating device to enable the gas mixture in the circulating pipeline to circularly flow at a set speed and take away the waste heat generated in the alkali metal vapor, thereby realizing the high-efficiency and high-power laser output of the laser. Compared with a blower in a traditional laser, the magnetic suspension blower reduces the contact between the blower and alkali metal, reduces the aggregation of the alkali metal in the blower, and improves the utilization rate of alkali metal vapor; the surface of the fan is provided with a heating temperature control component, so that the temperature of the power component of the magnetic suspension blower is higher than that of the circulating pipeline in the working process of the laser; thus, the aggregation of alkali metal in the fan is further avoided, the normal operation of the fan is ensured, and the recovery rate and recovery rate of alkali metal vapor are also improved in the alkali metal vapor recovery stage.
3. The invention is provided with the alkali metal source supply bottle and the alkali metal source storage chamber, firstly, alkali metal is transferred into the alkali metal source storage chamber, so that the pollution of the alkali metal is avoided; and the alkali metal source in the alkali metal source storage chamber is recovered and isolated from the pipeline, so that the buffer gas can be replaced for a plurality of times without polluting and wasting the alkali metal source. In addition, the invention can precisely control the pressure intensity and the proportion of the buffer gas, thereby precisely controlling the matching of the atomic absorption spectrum and the pumping laser linewidth and realizing the high-efficiency and high-quality work of the laser.
Drawings
Fig. 1 is a schematic diagram of the structure of a laser based on alkali vapor and buffer gas filling in accordance with the present invention.
Fig. 2 is a schematic diagram of a magnetic suspension blower in the laser of the present invention.
Reference numerals
A 100-laser; 110-a filling device; 1111-an alkali metal source supply bottle; 1112-a third gate valve; 1113-flange; 1114-fourth gate valve; 1121-a vacuum pump set; 1122-a gas mixing chamber; 1123-a second shut-off valve; 1124-gas cylinder; 1125-a gas purification column; 1126—a one-way valve; 1127—a pressure regulating valve; 1128—a gas mass flow meter; 1129—a pressure gauge; 113-a first shut-off valve; 120-a laser generating device; 121-an alkali metal source storage chamber; 122-a magnetic levitation blower; 1221-sealing a cartridge; 1222-heating a temperature control assembly; 1223-spindle; 1224-rotor combination; 1225-impeller; 123-a laser generation chamber; 1231-laser chamber; 1232-laser window sheet; 124-a circulation line; 125-a first gate valve; 126-flange interface; 127-tubing manometer; 128-a second gate valve; 129-fifth gate valve; 130-removable vacuum flange.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and/or processing steps closely related to aspects of the present invention are shown in the drawings, and other details not greatly related to the present invention are omitted.
In addition, it should be further noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Examples
Referring to fig. 1, the present invention provides a laser based on alkali vapor and buffer gas filling, wherein a laser 100 includes a filling device 110 and a laser generating device 120, the filling device 110 is connected with the laser generating device 120 through a detachable high vacuum flange 130, and the filling device 110 can provide an alkali source and buffer gas for the laser generating device 120. The laser generator 120 includes an alkali metal source storage chamber 121, a magnetic levitation blower 122 with a temperature control assembly, a laser generation chamber 123, and a circulation pipe 124 connecting the three. The alkali metal source storage chamber 121 is provided with a heating and refrigerating system and two outlets, the two outlets are respectively communicated with the circulation pipeline 124 and the filling device 110, a first gate valve 125 and a second gate valve 128 are respectively arranged between the alkali metal source storage chamber 121 and the circulation pipeline 124 and between the alkali metal source storage chamber 121 and the filling device 110, and a fifth gate valve 129 is also arranged between the alkali metal source storage chamber 121 and the two outlets, so that the filling, the evaporating and the recycling of alkali metal can be controlled. The laser 100 of the present invention facilitates continuous filling of the high-purity buffer gas and the alkali metal gain medium into the circulation pipe 124 of the laser generating device 120 by coupling the filling device 110 and the laser generating device 120, thereby improving the working efficiency of the laser 100.
Wherein, the circulation pipeline 124 is provided with a pipeline heating temperature control device, and the circulation pipeline 124 is heated and controlled in temperature during the working process of the laser generating device 120; a line pressure gauge 127 is also provided on the circulation line 124 for monitoring the pressure change of the gas in the circulation line 124. The heating and cooling system of the alkali metal source storage chamber 121 is wrapped outside the alkali metal source storage chamber 121, and is used for heating and evaporating the alkali metal source when the laser 100 works, and the heating temperature is lower than the temperature of the circulating pipeline 124 so as to alleviate deposition of alkali metal vapor at other parts; when the laser 100 stops operating, the alkali metal source storage chamber 121 is cooled for recovering alkali metal. The invention recovers the alkali metal vapor by the alkali metal source storage chamber 121 and isolates the alkali metal vapor from the circulating pipeline 124, which can be used for replacing the buffer gas for a plurality of times without polluting and wasting the alkali metal source, thereby saving the cost.
Referring to fig. 2, the magnetic suspension blower 122 includes a power assembly and a sealing cylinder 1221 disposed outside the power assembly, wherein the sealing cylinder 1221 is connected with the circulation pipeline 124 through a flange interface 126 to form a closed system; the inside of the sealed cylinder 1221 is provided with a heating temperature control assembly 1222, and the heating temperature control assembly 1222 wraps the power assembly so that the temperature thereof is higher than the temperature of the circulation pipe 124 during the operation of the laser generating device 120. It should be noted that the material of the sealing cylinder 1221 is resistant to high temperatures greater than 300 degrees celsius and does not react with alkali metals. The power assembly comprises a main shaft 1223, a rotor combination 1224 arranged on the periphery of the main shaft 1223 and an impeller 1225 connected with the main shaft 1223; an impeller 1225 extends into the circulation conduit 124 for driving the flow of alkali metal vapor and buffer gas within the circulation conduit 124.
The laser 100 must ensure uniform temperature in the circulation pipe 124 during operation, avoiding the alkali metal from encountering cold spot aggregation, the fan impeller in the prior art is connected with the main shaft, the impeller is positioned in the pipe and has consistent temperature with the pipe, the rotating shaft part is positioned in the fan main body, the temperature is lower than the pipe, and the recovery of alkali metal vapor is not favorable. The magnetic suspension blower 122 adopted in the invention is an oil-free magnetic suspension blower, which can directly reduce the contact between the blower and alkali metal, reduce the aggregation of the alkali metal at the position, enable the gas mixture in the circulating pipeline 124 to circularly flow at a set speed, take away the waste heat generated in the alkali metal vapor, and enable the circulating flow type DPAL to realize high-efficiency and high-power laser output. The power assembly is externally sleeved with a layer of sealing cylinder 1221 which is high-temperature resistant and does not react with alkali metal, the sealing cylinder 1221 is connected with the circulating pipeline 124 through a flange interface 126, and the sealing cylinder 1221 is provided with a heating temperature control assembly 1222, so that the temperature of the power assembly of the magnetic suspension blower 122 is higher than that of the circulating pipeline 124 in the working process of the laser 100. Thus, the aggregation of alkali metal in the fan can be avoided, the utilization rate of alkali metal vapor is improved, the normal operation of the fan is ensured, and the recovery rate and recovery rate of the alkali metal vapor are also improved.
In some specific embodiments, the laser generating chamber 123 includes a laser chamber 1231 and a laser window 1232, the laser window 1232 being a sapphire or borosilicate glass material, the laser window 1232 having a brewster angle and being coated with an anti-reflection film.
The filling device 110 comprises an alkali metal filling unit and a buffer gas filling unit connected with the alkali metal filling unit through a pipeline, and a first stop valve 113 is arranged between the alkali metal filling unit and the buffer gas filling unit; the alkali metal filling unit is connected to the laser generating device 120 by a detachable high vacuum flange 130.
Specifically, the alkali metal filling unit includes an alkali metal source supply bottle 1111, and a heating device for converting alkali metal into vapor is provided outside the alkali metal source supply bottle 1111 to the laser generating device 120; a third shutter valve 1112, a flange 1113, and a fourth shutter valve 1114 are provided in this order in the connection path between the alkali metal source supply bottle 1111 and the detachable high vacuum flange 130. The buffer gas filling unit includes a vacuum pump set 1121, at least one set of gas supply and purge components, and a gas mixing chamber 1122 connecting the gas supply and purge components; the gas supply and purge unit is connected to the vacuum pump unit 1121 via a pipe, and a second shutoff valve 1123 is provided between the gas supply and purge unit and the vacuum pump unit 1121.
In some specific embodiments, flange 1113 is a glass-to-metal flange and alkali supply bottle 1111 can be removed by flange 1113 to replace the alkali supply.
The gas supply and purification assembly comprises a gas cylinder 1124 and a gas purification column 1125 which are sequentially communicated, and the gas purification column 1125 is connected with the gas mixing chamber 1122 through a one-way valve 1126; a pressure regulating valve 1127 and a gas mass flowmeter 1128 are provided between the gas cylinder 1124 and the gas purifying column 1125. Wherein, the gas cylinder 1124 is a high borosilicate glass cylinder, and is baked at high temperature to remove water and oxygen, thereby avoiding reaction with alkali metal during storage of alkali metal. The pressure regulating valve 1127 comprises one or more stages of pressure regulating devices for regulating the air pressure in the air cylinder 1124 to the air pressure required for the operation of the laser; the gas mass flow meter 1128 is used to adjust and calculate the flow rate of the buffer gas. The gas cleaning column 1125 is used to further purify the buffer gas to avoid chemical reaction of the impurity gas with the alkali metal vapor. The one-way valve 1126 is used to control the one-way flow of gas to prevent backflow of gas from contaminating the gas storage source. The gas mixing chamber 1122 is used for mixing two or more buffer gases in the chamber according to a required ratio; the gas mixing chamber 1122 is provided with a pressure gauge 1129 for precisely controlling the pressure of various mixed buffer gases.
As shown in fig. 1, the buffer gas filling unit of the laser 100 includes two sets of gas supply and purge components connected in parallel; different buffer gases can be stored in the two gas cylinders 1124, and after being respectively regulated by the pressure regulating valve 1127 and the gas mass flowmeter 1128, the two gases flow through the gas purifying column 1125 for purification at the required gas pressure and flow rate, and the purified gases are mixed in the gas mixing cavity 1122 according to a certain pressure ratio and then flow into the circulating pipeline 124 of the laser generating device 120. Therefore, the pressure of the buffer gas and the proportion thereof can be precisely controlled, and then the atomic absorption spectrum and the pump laser linewidth matching can be precisely controlled.
In some specific embodiments, a pressure gauge 1129 is arranged on the connection path of the vacuum pump set 1121, the gas mixing cavity 1122 and the gas supply and purification assembly, the vacuum pump set 1121 and the pressure gauge 1129 pre-vacuumize the whole system to set vacuum values, and detect the vacuum degree of the system; the pressure gauge 1129 provided on the gas mixing chamber 1122 may also be used for the vacuum value of the mixed gas in the gas mixing chamber 1122.
In some specific embodiments, the alkali metal used in the laser 100 of the present invention is one or more of lithium, sodium, potassium, rubidium, and cesium. The buffer gas includes one of inert gases (helium, neon, argon, krypton, and xenon); or a mixed gas of one of inert gases and one of hydrocarbon gases (methane, ethane, ethylene, etc.).
In some embodiments, after filling device 110 is filled with alkali and buffer gas, the valves at both ends of removable high vacuum flange 130 may be closed, and both flange openings may be covered with blind plates to remove the filled portion; the laser generator 120 can be moved to any place to perform normal light emission, and the filling device 110 can be continuously connected with the laser generators 120 of other lasers 100 to fill the laser generators with medium.
The invention also provides an application of the laser based on alkali metal vapor and buffer gas filling, and the application of the laser 100 specifically comprises the following steps:
s1, the filling device 110 provides the laser generating device 120 with a buffer gas and an alkali metal source, where the buffer gas is helium and methane (total pressure is p=900 Torr, pressure ratio α=2), and specifically:
s11, filling alkali metal into the alkali metal source supply bottle 1111, and closing the third gate valve 1112; an alkali metal source supply bottle 1111 is connected to the pipe of the filling apparatus 110 through a flange 1113;
s12, opening the first gate valve 125, the fifth gate valve 129, the second gate valve 128, the first stop valve 113, the second stop valve 1123 and the fourth gate valve 1114; opening the vacuum pump set 1121 to vacuumize the whole system, and reading the vacuum degree of the system to 10 through the pressure gauge 1129 between the vacuum pump set 1121 and the second stop valve 1123 -5 After stopping vacuumizing after Pa, closing the first stop valve 113 and the second stop valve 1123;
s13, firstly filling buffer gas methane with lower pressure, opening a pressure regulating valve 1127, monitoring the flow of the buffer gas by using a gas mass flowmeter 1128, purifying by a gas purifying column 1125, then entering a gas mixing cavity 1122, and monitoring the pressure in the buffer gas cavity to reach P by using a pressure meter 1129 on the gas mixing cavity 1122 1 Rear (P) 1 P), closing the pressure regulating valve 1127; another buffer gas helium with higher pressure is introduced into the gas mixing chamber 1122 to be mixed with methane by the same step, and the pressure gauge 1129 monitors P 2 ((1+γ)P 1 ) Then, the pressure regulating valve 1127 is closed;
s14, opening the first stop valve 113, allowing the mixed gas in the gas mixing cavity 1122 to enter a circulating pipeline 124 of the laser generating device 120, monitoring the pressure in the pipeline by a pipeline pressure gauge 127 of the circulating pipeline 124, and closing the first gate valve 125 and the first stop valve 113 after the pressure in the circulating pipeline 124 reaches the required pressure P;
s15, opening a third gate valve 1112, heating the alkali metal source supply bottle 1111 by a heating device, driving alkali metal into the alkali metal source storage chamber 121 along a pipeline, and closing a second gate valve 128 and a fourth gate valve 1114; namely, the filling of the buffer gas and the alkali metal in the laser generating device 120 is completed;
s2, opening a pipeline heating temperature control device to heat the circulating pipeline 124, opening a heating temperature control assembly 1222 to heat the magnetic suspension blower 122, opening a heating and refrigerating system to heat the alkali metal source storage chamber 121, converting alkali metal in the alkali metal source storage chamber 121 into alkali metal vapor, and entering the circulating pipeline; the heating temperature of the heating temperature control component 1222 is 5-10 ℃ higher than the heating temperature of the pipeline heating temperature control device;
s3, turning on the magnetic suspension blower 122 to enable the buffer gas and the alkali metal vapor to circulate in the circulation pipeline 124; opening the laser generation chamber 123 to perform light emitting operation;
s4, after the laser 100 stops working, the heating and refrigerating system cools the alkali metal source storage chamber 121, and meanwhile, the heating temperature control assembly 1222 and the pipeline heating temperature control device continue to heat the magnetic suspension blower 122 and the circulating pipeline 124 respectively, and the heating temperature of the temperature control assembly 1222 is still 5-10 ℃ higher than that of the pipeline heating temperature control device, so that alkali metal vapor is recovered and enters the alkali metal source storage chamber 121.
Specifically, the buffer gas pressure or the proportion needs to be changed frequently due to test reasons, on the other hand, the buffer gas content changes after a long time due to pipeline leakage and needs to be replaced, and the invention can realize the replacement of the buffer gas for a plurality of times without polluting and wasting an alkali metal source. Specifically, after the alkali metal vapor in the circulation pipeline 124 is completely recovered into the alkali metal source storage chamber 121 in the step S4, the corresponding valve is adjusted to replace the buffer gas, and the fifth gate valve 129 is required to be closed in the ventilation process, so that the pollution of the alkali metal in the alkali metal source storage chamber 121 is avoided; the method also improves the recovery rate of alkali metal, avoids the problem of alkali metal aggregation after long-time use of the circulating pipeline 124 and the magnetic suspension blower 122, improves the utilization rate of alkali metal vapor, saves cost, and avoids unnecessary cleaning process.
In some specific embodiments, since the alkali metal source storage chamber 121 has already stored a certain amount of alkali metal, the alkali metal source storage chamber 121 can replenish the circulation pipe 124 with alkali metal vapor in the light-emitting gap of the laser generation chamber 123 without stopping the laser; similarly, a certain amount of mixed buffer gas can be stored in the gas mixing chamber 1122 of the buffer gas filling unit, and on the premise of making a system seal, the buffer gas in the circulation pipe 124 can be replenished by adjusting the corresponding valve in the light-emitting gap of the laser generating chamber 123.
In some embodiments, to ensure purity of the alkali metal recovered from the alkali metal source storage chamber 121, a filter plate may be disposed between the alkali metal source storage chamber 121 and the fifth gate valve 129, and the filter plate may be provided with an on or off switch, and the inside thereof may contain a high temperature resistant reducing agent; in the alkali metal recovery process, a filter plate does not need to be opened; when the alkali metal is reused, the filter plate is opened, and if the alkali metal is polluted by oxidation, the alkali metal vapor can be reduced and purified when passing through the filter plate, so that the alkali metal vapor with high purity is obtained.
In summary, the invention provides a laser based on alkali metal vapor and buffer gas filling and application thereof, the laser comprises a filling device and a laser generating device, the filling device is connected with the laser generating device through a detachable high vacuum flange, and the filling device provides an alkali metal source and buffer gas for the laser generating device. The laser generating device is provided with a magnetic suspension blower with a temperature control component, so that the gas mixture in the circulating pipeline circularly flows at a set speed, and waste heat generated in alkali metal vapor is taken away, thereby realizing high-efficiency and high-power laser output of the laser. Compared with a blower in a traditional laser, the magnetic suspension blower assembly is oilless and does not react with alkali metal, so that the consumption of the alkali metal in the blower is reduced, and the utilization rate of alkali metal vapor is improved; the surface of the fan is provided with a heating temperature control component, so that the temperature of the power component of the magnetic suspension blower is higher than that of the circulating pipeline in the working process of the laser; thus, the aggregation of alkali metal in the fan is further avoided, the normal operation of the fan is ensured, and the recovery rate and recovery rate of alkali metal vapor are also improved in the alkali metal vapor recovery stage. According to the invention, the filling device is coupled with the laser generating device, so that the laser generating device is conveniently filled with high-purity buffer gas and alkali metal gain medium continuously, and the working efficiency of the laser is improved; and the alkali metal vapor in the circulating pipeline of the laser generating device is completely recovered, so that the high-efficiency recycling of the alkali metal vapor is realized, the cost is saved, and the method has higher economic benefit.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention.
Claims (9)
1. The laser based on alkali metal vapor and buffer gas filling is characterized by comprising a filling device and a laser generating device, wherein the filling device is connected with the laser generating device through a detachable high-vacuum flange, and the filling device provides an alkali metal source and buffer gas for the laser generating device; the laser generating device comprises an alkali metal source storage chamber, a magnetic suspension blower with a temperature control component, a laser generating chamber and a circulating pipeline for connecting the three;
the magnetic suspension blower comprises a power assembly and a sealing cylinder arranged outside the power assembly, wherein the sealing cylinder is connected with the circulating pipeline through a flange interface to form a closed system; the inner side of the sealing cylinder is provided with a heating temperature control component, and the heating temperature control component wraps the power component, so that the temperature of the heating temperature control component is higher than the temperature of the circulating pipeline in the working process of the laser generating device;
the alkali metal source storage chamber is provided with a heating and refrigerating system and two outlets, the two outlets are respectively communicated with the circulating pipeline and the filling device, and a first gate valve and a second gate valve are respectively arranged between the alkali metal source storage chamber and the circulating pipeline and between the alkali metal source storage chamber and the filling device so as to control filling, evaporation and recovery of alkali metal.
2. The laser based on alkali vapor and buffer gas filling according to claim 1, wherein the filling device comprises an alkali metal filling unit, a buffer gas filling unit connected with the alkali metal filling unit through a pipeline, and a first stop valve is arranged between the alkali metal filling unit and the buffer gas filling unit; the alkali metal filling unit is connected with the laser generating device through the detachable high-vacuum flange.
3. The laser based on alkali vapor and buffer gas filling according to claim 2, wherein the alkali filling unit comprises an alkali source supply bottle, which is provided with heating means outside for converting the alkali metal into vapor for supply to the laser generating means; and a third gate valve, a flange and a fourth gate valve are sequentially arranged on a connecting passage of the alkali metal source supply bottle and the detachable high-vacuum flange.
4. The alkali vapor and buffer gas filling based laser of claim 2, wherein the buffer gas filling unit comprises a vacuum pump set, at least one set of gas supply and purge components, and a gas mixing chamber connecting the gas supply and purge components; the gas supply and purification assembly is connected with the vacuum pump set through a pipeline, and a second stop valve is arranged between the gas supply and purification assembly and the vacuum pump set.
5. The alkali vapor and buffer gas filling based laser of claim 1, wherein the power assembly comprises a spindle, a rotor assembly disposed about the spindle, and an impeller coupled to the spindle; the impeller extends into the circulation duct for driving the flow of the alkali metal vapor and buffer gas within the circulation duct.
6. The laser based on alkali vapor and buffer gas filling according to claim 1, wherein the circulation pipe is provided with a pipe heating temperature control device, which heats and controls the temperature of the circulation pipe during the operation of the laser generating device.
7. The alkali vapor and buffer gas filling based laser of claim 4, wherein the gas supply and purge assembly comprises a gas cylinder and a gas purge column in sequential communication, the gas purge column being connected to the gas mixing chamber by a one-way valve; a pressure regulating valve and a gas mass flowmeter are arranged between the gas storage bottle and the gas purifying column.
8. Use of a laser based on alkali vapour and buffer gas filling according to any of claims 1-7, characterized in that the use of the laser comprises the steps of:
s1, providing buffer gas and alkali metal source for a laser generating device by a filling device, wherein the alkali metal source enters an alkali metal source storage chamber of the laser generating device, the buffer gas enters a circulating pipeline, and a second gate valve between the alkali metal source storage chamber and the filling device is closed;
s2, opening a pipeline heating temperature control device to heat the circulating pipeline, opening a heating temperature control component to heat a magnetic suspension blower, opening a heating refrigerating system to heat the alkali metal source storage chamber, converting alkali metal in the alkali metal source storage chamber into alkali metal vapor, and entering the circulating pipeline; the heating temperature of the heating temperature control component is 5-10 ℃ higher than that of the pipeline heating temperature control device;
s3, turning on the magnetic suspension blower to enable the buffer gas and the alkali metal vapor to circulate in the circulating pipeline; starting a laser generation chamber to enable the laser generation chamber to perform light emitting work;
s4, after the laser stops working, the heating and refrigerating system cools the alkali metal source storage chamber, and meanwhile, the heating and temperature controlling assembly and the pipeline heating and temperature controlling device continue to heat the magnetic suspension blower and the circulating pipeline respectively, so that alkali metal vapor is recovered and enters the alkali metal source storage chamber.
9. Use of a laser based on alkali vapour and buffer gas filling according to claim 8, characterized in that in step S1 the filling means provides the laser generating means with an alkali source of: firstly, closing a first gate valve between the alkali metal source storage chamber and the circulating pipeline, and closing a first stop valve between an alkali metal filling unit and a buffer gas filling unit; then the heating device outside the alkali metal source supply bottle is turned on, alkali metal in the heating device is changed into alkali metal vapor to enter the alkali metal source storage chamber, and the alkali metal source is transferred.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6175583B1 (en) * | 1996-02-16 | 2001-01-16 | Macquarie Research Ltd | Metal vapour laser |
| CN108321664A (en) * | 2018-03-22 | 2018-07-24 | 中国人民解放军国防科技大学 | Open-loop flowing heat-dissipation alkali metal vapor laser gain generator |
| CN113594832A (en) * | 2021-07-28 | 2021-11-02 | 中国科学院空天信息创新研究院 | Laser diode pumping axial alkali metal vapor laser and laser generation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9048617B2 (en) * | 2012-07-11 | 2015-06-02 | Logos Technologies, Llc | Metal vapor circulating system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6175583B1 (en) * | 1996-02-16 | 2001-01-16 | Macquarie Research Ltd | Metal vapour laser |
| CN108321664A (en) * | 2018-03-22 | 2018-07-24 | 中国人民解放军国防科技大学 | Open-loop flowing heat-dissipation alkali metal vapor laser gain generator |
| CN113594832A (en) * | 2021-07-28 | 2021-11-02 | 中国科学院空天信息创新研究院 | Laser diode pumping axial alkali metal vapor laser and laser generation method |
Non-Patent Citations (1)
| Title |
|---|
| 《Operation of static and flowing Cs DPAL with different buffer gas mixtures》;R. Knize等;SPIE;全文 * |
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