CN114188799B - Closed-loop type flowing gas stimulated Raman scattering frequency conversion device - Google Patents
Closed-loop type flowing gas stimulated Raman scattering frequency conversion device Download PDFInfo
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- 238000001069 Raman spectroscopy Methods 0.000 title claims abstract description 81
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 40
- 230000003287 optical effect Effects 0.000 claims abstract description 98
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 8
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 62
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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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
- H01S3/30—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
- H01S3/305—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects in a gas
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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
- H01S3/034—Optical devices within, or forming part of, the tube, e.g. windows, mirrors
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/102—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
- H01S3/1026—Controlling the active medium by translation or rotation, e.g. to remove heat from that part of the active medium that is situated on the resonator axis
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/102—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
- H01S3/104—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation in gas lasers
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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The invention relates to the technical field of Raman lasers, in particular to a closed-loop type flowing gas stimulated Raman scattering frequency conversion device which comprises a gas circulation main pipeline, an air flow driving device, a first optical window and a second optical window, wherein the gas circulation main pipeline is a closed-loop type sealing pipeline, one side of the gas circulation main pipeline is an air flow driving section, the other side of the gas circulation main pipeline is a light passing section, the air flow driving section is provided with the air flow driving device, one end of the gas circulation main pipeline is provided with the first optical window, the other end of the gas circulation main pipeline is provided with the second optical window, the first optical window, the light passing section and the second optical window are arranged in a line, and the first optical window and the second optical window are symmetrically arranged and are respectively fixed on the gas circulation main pipeline through fixing components. The invention ensures that the Raman medium circularly flows and the light passing section in the flow pipeline maintains a better laminar flow state, ensures heat dissipation, reduces the conditions of laser light path deflection distortion and the like caused by uneven airflow or vortex, and can be used for Raman frequency conversion of high-power or higher repetition frequency laser.
Description
Technical Field
The invention relates to the technical field of Raman lasers, in particular to a closed-loop type flowing gas stimulated Raman scattering frequency conversion device.
Background
The stimulated Raman scattering technology is a common laser frequency conversion method, and has the advantages that the device is simple in design, convenient and fast to debug, the stimulated Raman mediums can be selected to be various, the spectrum movement ranges of different Raman mediums to pump laser are different, for example, solids can generate movement of hundreds of wave numbers, and gas Raman mediums can generate frequency shift of thousands of wave numbers, so that the conversion span of using Raman frequency conversion is larger, and the frequency conversion method canThe variable wavelength is rich. The Raman medium commonly used at present is a crystal (such as diamond, srWO 4 ) Liquid (e.g.: h 2 O，CS 2 ，C 6 H 6 ) And gases (e.g.: h 2 ，CH 4 ) The stimulated Raman produced by the gas Raman medium has large stimulated Raman frequency shift and low damage threshold, and can be used for wavelength conversion of high-power laser, so that the gas Raman medium has wide application in various fields.
In the raman conversion device using the gas medium, the thermal effect generated at the laser focusing position can be diffused along with the movement of the gas molecules, so that the performance of the raman conversion device can be kept stable within a certain repetition frequency range. However, when the heat generated in the stimulated raman conversion process is more or the repetition frequency of the laser used is higher, the heat generated at the focusing position of the laser may not be timely diffused, so that the raman conversion efficiency is reduced, the light beam drifts or heat distortion is generated, and other adverse consequences are caused, and the reasons include uneven gas density (such as thermal lens effect) in the raman tank caused by the thermal effect, or local vortex generated by the disordered flow of gas molecules caused by the temperature difference. This results in stimulated raman scattering frequency conversion devices that can only operate at lower repetition rates or are not suitable for raman conversion of higher power lasers.
Disclosure of Invention
The invention aims to provide the closed-loop type flowing gas stimulated Raman scattering frequency conversion device, so that Raman medium circularly flows, a light passing section in a flowing pipeline is kept in a better laminar state, and the conditions of light path deflection distortion and the like of pumping laser and Raman laser caused by uneven airflow or vortex are reduced while effective heat dissipation is ensured, so that the device can be used for Raman frequency conversion of high-power or higher-repetition-frequency laser.
The aim of the invention is realized by the following technical scheme:
the utility model provides a closed-loop type flowing gas stimulated Raman scattering frequency conversion device, includes gas circulation main line, air current drive arrangement, first optical window and second optical window, gas circulation main line is closed-loop type sealed pipeline and one side is air current drive section, opposite side is logical light section, the air current drive section is equipped with air current drive arrangement, gas circulation main line one end is equipped with first optical window, the other end is equipped with the second optical window, just first optical window, logical light section and second optical window are a line setting, first optical window and second optical window symmetry set up and are fixed in respectively through fixed subassembly on the gas circulation main line.
The gas circulation main pipeline comprises a gas flow driving section, a light passing section, a bent pipe section and a connecting section, wherein the end part of the gas flow driving section and the end part of the light passing section are respectively connected with the corresponding end parts of the corresponding side connecting sections through the bent pipe section.
The first optical window is tangential to the bent pipe section at the input end of the light transmission section, and the second optical window is tangential to the bent pipe section at the output end of the light transmission section.
The included angle between the first optical window and the vertical direction and the included angle between the second optical window and the vertical direction are alpha, and the alpha is 45-65 degrees.
The first optical window and the second optical window are respectively arranged on the bent pipe section at the corresponding side through fixing components, the fixing components comprise an upper clamping block and a lower clamping block, the first optical window and the second optical window are respectively clamped and fixed through the upper clamping block and the lower clamping block in the corresponding fixing components, and light transmission openings for laser to pass through are formed in the upper clamping block and the lower clamping block.
The upper clamping block is fixedly connected with the lower clamping block through a screw, and a sealing element is arranged between the upper clamping block and the lower clamping block.
The first optical window and the second optical window are plane optical windows, pump laser antireflection films are plated on two sides of the first optical window, and pump laser antireflection films and Raman laser antireflection films are plated on two sides of the second optical window.
The invention has the advantages and positive effects that:
1. according to the invention, the Raman medium circularly flows in the Raman frequency conversion device by utilizing the gas circulation structure, and the proper pipeline design is adopted, so that the light transmission section part of the gas circulation main pipeline, through which laser passes, is kept in a better laminar flow state, no or only a very small amount of vortex is generated, the pumping laser and the Raman laser pass in the gas laminar flow region while effective heat dissipation is ensured, and the deflection distortion of an optical path caused by uneven airflow or vortex is reduced, so that the Raman frequency conversion device can be used for Raman frequency conversion of high-power laser with higher repetition frequency.
2. The invention is a closed loop pipeline as a whole, the whole structure is greatly simplified, the optical windows on two sides are respectively clamped and fixed by the corresponding fixing components, and the optical windows are convenient to install and replace.
Drawings
Figure 1 is a schematic view of the structure of the present invention,
figure 2 is an enlarged view of the securing assembly of figure 1,
fig. 3 is another angular schematic view of the fixing assembly of fig. 2.
Wherein, 1 is the gas circulation main line, 101 is the air current drive section, 102 is the light-passing section, 103 is the bend section, 104 is the linkage segment, 2 is the air current drive arrangement, 3 is first optical window, 4 is the second optical window, 5 is fixed subassembly, 501 is the lower clamp splice, 502 is the upper clamp splice, 503 is the screw, 504 is the light-passing opening.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the invention comprises a gas circulation main pipeline 1, a gas flow driving device 2, a first optical window 3 and a second optical window 4, wherein the gas circulation main pipeline 1 is a closed-loop sealing pipeline, one side of the gas circulation main pipeline 1 is provided with a gas flow driving section 101, the other side is provided with a light passing section 102, the gas flow driving section 101 is provided with the gas flow driving device 2 for driving gas flow to circularly flow in the gas circulation main pipeline 1, the gas flow driving device 2 is a device capable of driving gas to flow, such as an axial flow fan, a fan or an air pump, and the like, one end of the gas circulation main pipeline 1 is provided with the first optical window 3, the other end is provided with the second optical window 4, the first optical window 3, the light passing section 102 and the second optical window 4 are arranged in a line, laser sequentially passes through the first optical window 3, the light passing section 102 and the second optical window 4, and the first optical window 3 and the second optical window 4 are symmetrically arranged and are outwards inclined.
As shown in fig. 1, the gas circulation main pipeline 1 includes a gas flow driving section 101, a light passing section 102, a bend section 103 and a connecting section 104, wherein the end of the gas flow driving section 101 and the end of the light passing section 102 are respectively connected with the corresponding end of the corresponding side connecting section 104 through the bend section 103, so as to form a closed-loop closed circulation pipeline. The main gas circulation pipeline 1 is a hollow circular pipe, the inner wall of the main gas circulation pipeline 1 is smooth and has no burrs or bulges so as to keep the gas flow field inside the pipeline uniform, the light-passing section 102 part is kept in a better laminar state, no or only a very small amount of vortex is generated, and in addition, the main gas circulation pipeline 1 is provided with an inflatable port capable of being opened and closed for inflating gas.
As shown in fig. 1, the first optical window 3 is tangentially arranged with the curved pipe section 103 at the input end of the light-passing section 102, the second optical window 4 is tangentially arranged with the curved pipe section 103 at the output end of the light-passing section 102, the included angle between the first optical window 3 and the vertical direction and the included angle between the second optical window 4 and the vertical direction are both α, and the α is 45-65 degrees.
As shown in fig. 1, the first optical window 3 and the second optical window 4 are respectively installed on the bent pipe section 103 on the corresponding sides through fixing components 5, as shown in fig. 2-3, the fixing components 5 comprise an upper clamping block 502 and a lower clamping block 501, the lower clamping block 501 is fixedly arranged on the corresponding bent pipe section 103, the upper clamping block 502 and the lower clamping block 501 are fixedly connected through screws 503, the first optical window 3 and the second optical window 4 are respectively clamped and fixed through the upper clamping block 502 and the lower clamping block 501 in the corresponding fixing components 5, and in order to ensure sealing, a sealing ring or other sealing elements are arranged between the upper clamping block 502 and the lower clamping block 501 to prevent gas leakage, and light transmission openings 504 for laser to pass through are respectively arranged on the upper clamping block 502 and the lower clamping block 501.
The first optical window 3 and the second optical window 4 are planar optical windows, the two sides of the first optical window 3 are plated with pumping laser antireflection films, the two sides of the second optical window 4 are plated with pumping laser antireflection films and Raman laser antireflection films, and the antireflection films are known in the art.
The working principle of the invention is as follows:
the invention designs a flowing gas stimulated Raman scattering frequency conversion device for radiating heat by using circulating air flow, which is designed to ensure that a light passing section 102 in a pipeline maintains a better laminar flow state, and reduces the optical path deflection distortion of pump laser and Raman laser caused by uneven air flow or vortex at the same time of ensuring effective heat radiation.
Embodiment one, based on flowing CO 2 And the stimulated Raman scattering frequency conversion device of the gas.
As shown in FIG. 1, CO with a pressure of 10atm 2 The gas is filled into a closed gas circulation main pipeline 1, and a gas flow driving device 2 is controlled to drive high-pressure CO 2 The gas flows clockwise, the gas flow enters the light-passing section 102 through the connecting section 104 on one side, and the gas flow enters the gas flow driving section 101 through the connecting section 104 on the other side after being output by the light-passing section 102, so that the circulating flow is formed. The present embodiment controls the gas flow rate by controlling the rotation speed of the airflow driving device 2 (axial flow fan), so as to adapt to different heat dissipation requirements.
In this embodiment, the included angle α between the first optical window 3 and the second optical window 4 and the vertical direction is 57 degrees, and the first optical window 3 and the second optical window 4 are symmetrically arranged to compensate for the light deflection caused after the laser light passes through the optical windows. Both sides of the first optical window 3 and both sides of the second optical window 4 are plated with 1064nm antireflection films and 1249nm antireflection films.
This embodiment employs Nd to output electro-optic Q: YAG pulse laser is used as pumping laser source, the output wavelength is 1064nm, the pulse width is 10ns, the laser single pulse energy is 1J, the laser work repetition frequency is adjustable, the maximum is 20Hz, 1064nm pulse laser is input into the light transmission section 102 through the first optical window 3, and is output through the second optical window 4 after passing through the light transmission section 102.
When the airflow driving device 2 does not rotate, the high-pressure CO in the closed air circulation pipeline 2 When the repetition frequency of the laser is 1Hz, the embodiment can work normally and stably, the laser Raman conversion efficiency is not reduced along with time, and the output Raman laser beam is not dithered or deformed. When the repetition frequency of the laser is 2Hz, the embodiment can work normally and stably, the laser Raman conversion efficiency is not reduced with time, but the output Raman laser beam is slightly dithered and deformed. When the repetition frequency of the laser is 4Hz, the laser Raman conversion efficiency is reduced along with time, the output Raman laser beam has obvious jitter, and the stimulated Raman laser spot also has obvious deformation. When the laser repetition frequency increases again, the stimulated raman laser is severely degraded or even rendered inoperable within a few seconds.
When the airflow driving device 2 rotates, the repetition frequency of stable operation can be obviously improved, for example, when the wind speed is 2m/s, the laser Raman conversion efficiency is not reduced with time when the laser repetition frequency is 5Hz, the output Raman laser beam is not dithered or deformed, and when the laser repetition frequency is 10Hz, the laser Raman conversion efficiency is not reduced with time, and the output Raman laser beam is slightly dithered and deformed; when the wind speed is 5m/s, the laser Raman conversion efficiency is not reduced with time when the laser repetition frequency is 10Hz, the output Raman laser beam is free from jitter or deformation, and when the laser repetition frequency is 20Hz, the laser Raman conversion efficiency is not reduced with time, and the output Raman laser beam is slightly jittered and deformed.
Embodiment two, flow N based 2 And the stimulated Raman scattering frequency conversion device of the gas.
As shown in FIG. 1, N with a pressure of 20atm 2 The gas is filled into a closed gas circulation main pipeline 1, and a gas flow driving device 2 is controlled to drive high pressure N 2 The gas flows clockwise, the gas flow enters the light-passing section 102 through the connecting section 104 on one side, and the gas flow enters the gas flow driving section 101 through the connecting section 104 on the other side after being output by the light-passing section 102, so that the circulating flow is formed. In this embodiment, the rotational speed of the airflow driving device 2 (axial flow fan) is controlled to control the airflow rate so as to adapt to different heat dissipation requirements,
in this embodiment, the included angles α between the first optical window 3 and the second optical window 4 and the vertical direction are 58 degrees, and the first optical window 3 and the second optical window 4 are symmetrically arranged to compensate for the light deflection caused after the laser light passes through the optical windows. Both sides of the first optical window 3 and both sides of the second optical window 4 are plated with 532nm antireflection films and 607nm antireflection films. The inner diameter of the tube of the light transmitting section 102 is d=25mm, and the length is 1.55m.
This embodiment employs Nd to output electro-optic Q: YAG pulse laser is used as pumping laser source, the output wavelength is 532nm, the pulse width is 10ns, the laser single pulse energy is 0.6J, the laser work repetition frequency is adjustable, and the maximum is 30Hz. The 532nm pulse laser is input into the light-transmitting section 102 through the first optical window 3 by laser and is output through the second optical window 4 after passing through the light-transmitting section 102.
When the airflow driving device 2 does not rotate, the high pressure N in the sealed main air circulation pipeline 1 2 When the repetition frequency of the laser is 2Hz, the embodiment can work normally and stably, the laser Raman conversion efficiency is not reduced along with time, and the output Raman laser beam is not dithered or deformed. When the repetition frequency of the laser is 3Hz, the embodiment can work normally and stably, the laser Raman conversion efficiency is not reduced with time, but the output Raman laser beam is slightly dithered and deformed. When the repetition frequency of the laser is 5Hz, the laser Raman conversion efficiency is reduced along with time, the output Raman laser beam has obvious jitter, and the stimulated Raman laser spot also has obvious deformation; when the repetition frequency of the laser increases again, the stimulated raman laser is severely degraded or even rendered inoperable within a few seconds.
When the airflow driving device 2 rotates, the repetition frequency of stable operation can be obviously improved, for example, when the wind speed is 2m/s, the laser Raman conversion efficiency is not reduced with time when the laser repetition frequency is 5Hz, the output Raman laser beam is not dithered or deformed, and when the laser repetition frequency is 10Hz, the laser Raman conversion efficiency is not reduced with time, and the output Raman laser beam is slightly dithered and deformed; when the wind speed is 5m/s, the laser Raman conversion efficiency is not reduced with time when the laser repetition frequency is 15Hz, the output Raman laser beam is free from jitter or deformation, and when the laser repetition frequency is 30Hz, the laser Raman conversion efficiency is not reduced with time, and the output Raman laser beam is slightly jittered and deformed.
Claims (7)
1. A closed loop type flowing gas stimulated Raman scattering frequency conversion device is characterized in that: including gas circulation main line (1), air current drive arrangement (2), first optical window (3) and second optical window (4), gas circulation main line (1) is closed-loop seal line and one side is air current drive section (101), opposite side is logical light section (102), air current drive section (101) are equipped with air current drive arrangement (2), gas circulation main line (1) one end is equipped with first optical window (3), the other end is equipped with second optical window (4), just first optical window (3), logical light section (102) and second optical window (4) are a line setting, first optical window (3) and second optical window (4) symmetry set up and are fixed in on gas circulation main line (1) through fixed subassembly (5) respectively.
2. The closed loop flowing gas stimulated raman scattering variable frequency device of claim 1, wherein: the gas circulation main pipeline (1) comprises a gas flow driving section (101), a light passing section (102), a bent pipe section (103) and a connecting section (104), wherein the end part of the gas flow driving section (101) and the end part of the light passing section (102) are respectively connected with the corresponding end part of the corresponding side connecting section (104) through the bent pipe section (103).
3. The closed loop flowing gas stimulated raman scattering variable frequency device of claim 2, wherein: the first optical window (3) is tangentially arranged with a bent pipe section (103) at the input end of the light transmission section (102), and the second optical window (4) is tangentially arranged with the bent pipe section (103) at the output end of the light transmission section (102).
4. A closed loop flowing gas stimulated raman scattering variable frequency device according to claim 1 or 3, wherein: the included angle between the first optical window (3) and the vertical direction and the included angle between the second optical window (4) and the vertical direction are alpha, and the alpha is 45-65 degrees.
5. A closed loop flowing gas stimulated raman scattering variable frequency device in accordance with claim 3 wherein: the optical device is characterized in that the first optical window (3) and the second optical window (4) are respectively arranged on the bent pipe section (103) on the corresponding side through fixing components (5), the fixing components (5) comprise an upper clamping block (502) and a lower clamping block (501), the first optical window (3) and the second optical window (4) are respectively clamped and fixed through the upper clamping block (502) and the lower clamping block (501) in the corresponding fixing components (5), and light-transmitting openings (504) for laser to pass through are formed in the upper clamping block (502) and the lower clamping block (501).
6. The closed loop flowing gas stimulated raman scattering variable frequency device of claim 5, wherein: the upper clamping block (502) is fixedly connected with the lower clamping block (501) through a screw (503), and a sealing element is arranged between the upper clamping block (502) and the lower clamping block (501).
7. The closed loop flowing gas stimulated raman scattering variable frequency device of claim 1, wherein: the first optical window (3) and the second optical window (4) are plane optical windows, pumping laser antireflection films are plated on two sides of the first optical window (3), and pumping laser antireflection films and Raman laser antireflection films are plated on two sides of the second optical window (4).
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| CN104779517A (en) * | 2015-02-10 | 2015-07-15 | 西北核技术研究所 | Closed circulating repetition-frequency optical pumping xenon fluoride laser system |
| CN105552693A (en) * | 2016-02-22 | 2016-05-04 | 中国科学院电子学研究所 | DPAL laser with local bidirectional alternative flowing gain medium |
| CN110600987A (en) * | 2018-06-13 | 2019-12-20 | 中国科学院大连化学物理研究所 | Fan type gas circulation high repetition frequency Raman cell |
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