CN114188802B - Pipeline type flowing gas stimulated Raman scattering frequency conversion device - Google Patents
Pipeline type flowing gas stimulated Raman scattering frequency conversion device Download PDFInfo
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- CN114188802B CN114188802B CN202010958979.9A CN202010958979A CN114188802B CN 114188802 B CN114188802 B CN 114188802B CN 202010958979 A CN202010958979 A CN 202010958979A CN 114188802 B CN114188802 B CN 114188802B
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- 238000001069 Raman spectroscopy Methods 0.000 title claims abstract description 91
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 43
- 238000005086 pumping Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 98
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000005350 fused silica glass Substances 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 230000003667 anti-reflective effect 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
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
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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
-
- 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
-
- 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
-
- 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
-
- 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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- Electromagnetism (AREA)
- 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 pipeline type flowing gas stimulated Raman scattering frequency conversion device, wherein a gas circulation main pipeline comprises a gas flow driving section, a light passing section and a connecting section, the gas flow driving section is provided with the gas flow driving device, one end of the light passing section is provided with an input light guide section, the other end of the light passing section is provided with an output light guide section, a first end pipe is arranged on the input light guide section and is connected with a corresponding connecting section, a second end pipe is arranged on the output light guide section and is connected with the corresponding connecting section, a laser input window is arranged at an inlet of the input light guide section, a laser output window is arranged at an outlet of the output light guide section, gas flow guide windows are arranged in the input light guide section and the output light guide section, the two gas flow guide windows are symmetrically inclined outwards, and flow guide balance pipes are arranged on the two end pipes and are communicated with the corresponding light guide sections. The invention ensures that the Raman medium circularly flows and the light transmission section keeps a better laminar flow state, ensures heat dissipation, reduces the laser light path deflection and the like, 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 pipeline 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 and convenient 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 tens of wave numbers, and gas Raman mediums can generate frequency shift of thousands of wave numbers, so that the conversion span of Raman frequency conversion is larger, and the 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 a pipeline type flowing gas stimulated Raman scattering frequency conversion device, which enables Raman medium to circularly flow and a light passing section in a flowing pipeline to keep a better laminar flow state, and reduces conditions of deflection distortion and the like of optical paths of pumping laser and Raman laser caused by uneven airflow or vortex while guaranteeing effective heat dissipation, 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 pipeline formula flowing gas stimulated Raman scattering variable frequency device, includes gas circulation main line and air current drive arrangement, gas circulation main line includes air current drive section, logical light section and linkage segment, just air current drive section both ends and logical light section both ends are respectively through the linkage segment intercommunication of corresponding side, the air current drive section is equipped with air current drive arrangement, logical light section one end is equipped with the input light guide section, the other end is equipped with the output light guide section, just be equipped with first end pipe on the input light guide section and be connected with the linkage segment of corresponding side, be equipped with the second end pipe on the output light guide section and be connected with the linkage segment of corresponding side the entry of input light guide section is equipped with the laser input window be equipped with the export of output light guide section be equipped with first gas guide window in the input light guide section be equipped with second gas guide window in the output light guide section, just first gas guide window and second gas guide window symmetry set up and all incline outwards, the first end pipe outside be equipped with first guide balance pipe with input light guide section intercommunication, the second guide pipe outside is equipped with the second guide pipe outside balance.
The gas circulation main pipeline is provided with a bent pipe section, and two ends of the gas flow driving section are respectively connected with the connecting sections on the corresponding sides through the bent pipe section.
The first gas diversion window is positioned below the first end pipe, the second gas diversion window is positioned below the second end pipe, and the gas turns to flow along the first gas diversion window and the second gas diversion window.
The included angle between the first gas flow guide window and the central axis of the light transmission section and the included angle between the second gas flow guide window and the central axis of the light transmission section are both alpha, and the alpha is 45-65 degrees.
The laser input window is a focusing lens, the pumping laser antireflection films and the Raman laser high-reflection films are plated on the two sides of the laser input window, and the pumping laser and the Raman laser antireflection films are plated on the two sides of the laser output window.
The focal length of the laser input window is f, the distance between the laser input window and the laser output window is L, and f and L are more than or equal to 0.45L and less than or equal to 0.6L.
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 gas circulation main pipeline is formed by connecting the multiple sections of pipelines, the pipelines with proper lengths can be selected for assembly according to actual needs, and when a certain section of pipeline is damaged, the pipeline is only required to be replaced, and other parts of pipelines can be continuously used, so that the cost is reduced.
Drawings
Figure 1 is a schematic view of the structure of the present invention,
figure 2 is an enlarged view at a in figure 1,
fig. 3 is an enlarged view at B in fig. 1.
Wherein, 1 is the gas circulation main line, 101 is the air current drive section, 102 is the light-passing section, 1021 is first end pipe, 1022 is the second end pipe, 103 is the curved pipe section, 104 is the linkage segment, 2 is the air current drive device, 3 is the first water conservancy diversion balanced pipe, 4 is the input light guide section, 5 is the laser input window, 6 is first gas water conservancy diversion window, 7 is the second gas water conservancy diversion window, 8 is the output light guide section, 9 is the laser output window, 10 is the balanced pipe of second water conservancy diversion.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1-3, the invention comprises a gas circulation main pipeline 1 and a gas flow driving device 2, wherein the gas circulation main pipeline 1 is a closed pipeline formed by connecting multiple sections of pipelines, as shown in fig. 1, one side of the gas circulation main pipeline 1 is a gas flow driving section 101, the other side is a light passing section 102, two ends of the gas flow driving section 101 and two ends of the light passing section 102 are respectively communicated through a connecting section 104, 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 flow such as an axial fan or an air pump, one end of the light passing section 102 is provided with an input light guide section 4, the other end of the light passing section is provided with an output light guide section 8, as shown in fig. 2-3, a first end pipe 1021 is arranged on the input light guide section 4 and is connected with a connecting section 104 on the corresponding side, a laser input window 5 is arranged on an inlet of the input light guide section 4, a second end pipe 1022 is connected with the connecting section 104 on the corresponding side, an outlet of the output light guide section 8 is provided with an output light guide window 9, an output window 9 is arranged in the output light guide section 8 and is provided with an output light guide window 6, a first end of the first light guide section 1022 is arranged under the first end 6 is connected with a second light guide section 6, a balancing section 6 is arranged outside the first end of the first light guide section 7 is connected with the second light guide section 7, and is connected with the second end 7, and is connected with the first end 7, and is arranged outside of the first end 7 is symmetrically, and is connected with the first end 6, and is connected with the first end 7, and is arranged, and is positioned outside, and is 6, and 10.
As shown in fig. 1, the gas circulation main pipeline 1 further includes a bend section 103 in addition to the gas flow driving section 101, the light passing section 102 and the connecting section 104, and two ends of the gas flow driving section 101 are respectively connected with the connecting sections 104 on the corresponding sides through the bend section 103, so that the gas circulation main pipeline 1 forms a closed circulation pipeline. The air flow driving section 101 in the air circulation main pipeline 1 is a hollow circular pipe, the light passing section 102, the bent pipe section 103 and the connecting section 104 are hollow square pipes, the inner wall of the air circulation main pipeline 1 is smooth and free of burrs or bulges so as to keep the air flow field inside the pipeline uniform, and the light passing section 102 part keeps a better laminar state, and no or only a small amount of vortex is generated. In addition, the gas circulation main pipeline 1 is provided with an inflatable port which can be opened and closed for inflating gas.
As shown in fig. 1 to 3, the first gas guiding window 6 and the second gas guiding window 7 are symmetrically arranged and both incline outwards, and the gas can flow along the first gas guiding window 6 and the second gas guiding window 7 in a turning way, and in order to prevent gas leakage, the first gas guiding window 6 and the second gas guiding window 7 are both arranged in the corresponding light guiding sections in a sealing way. The included angle between the first gas diversion window 6 and the central axis of the light-passing section 102 and the included angle between the second gas diversion window 7 and the central axis of the light-passing section 102 are both alpha, the alpha is 45-65 degrees, and in order to reduce the deflection of the light path caused by the optical window, the first gas diversion window 6 and the second gas diversion window 7 are thin optical elements with the thickness of less than 3 mm.
As shown in fig. 1 to 3, the first flow guiding balance pipe 3 ensures that the air pressures at two sides of the first air guiding window 6 are consistent, and the second flow guiding balance pipe 10 ensures that the air pressures at two sides of the second air guiding window 7 are consistent, so that the first air guiding window 6 and the second air guiding window 7 are not pressurized.
The laser input window 5 is a focusing lens, the two sides of the laser input window are plated with a pumping laser antireflection film and a Raman laser high-reflection film, and the two sides of the laser output window 9 are plated with a pumping laser and a Raman laser antireflection film. Both the antireflective film and the highly reflective film are well known in the art.
The focal length of the laser input window 5 is f, the distance between the laser input window 5 and the laser output window 9 is L, f and L are required to meet the requirement that f is more than or equal to 0.45L and less than or equal to 0.6L, so that the laser is ensured to be focused at the middle position of the light transmission section 102 after being input through the laser input window 5 and is subjected to stimulated Raman scattering under the action of high-pressure gas.
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 light 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, and the like, in order to solve the problem of light distortion or conversion efficiency reduction in the high-repetition frequency stimulated Raman scattering process.
Embodiment one: based on flowing CO 2 And the stimulated Raman scattering frequency conversion device of the gas.
As shown in FIG. 1, CO at a pressure of 10atm 2 The gas is filled into a closed gas circulation main pipeline 1, and a gas flow driving device 2 (axial flow fan) 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 at one side, and is output by the light-passing section 102 and then is output by the other sideThe one-sided connecting section 104 enters the air flow driving section 101 to form a circulating flow. In this embodiment, the rotational speed of the airflow driving device 2 (axial flow fan) is controlled to control the airflow speed so as to adapt to different heat dissipation requirements, and the first flow guiding balance pipe 3 and the second flow guiding balance pipe 10 respectively communicate the air circulation main pipeline 1 with the input light guiding section 4 and the output light guiding section 8, so as to ensure that both sides of the first air flow guiding window 6 are pressed consistently and both sides of the second air flow guiding window 7 are pressed consistently.
In this embodiment, the first gas guiding window 6 and the second gas guiding window 7 are both fused silica plates with thickness of 2mm, and the included angle α between the first gas guiding window 6 and the central axis of the passing section 102 is 57 degrees and symmetrically arranged to compensate the deflection of light caused by the laser passing through the isolating window, the laser input window 5 is a fused silica planoconvex lens, the diameter is d=25mm, the focal length is 0.5m, both sides are plated with 1064nm antireflection film and 1249nm high reflection film, the laser output window 9 is a fused silica plane mirror, both sides are plated with 1064nm antireflection film and 1249nm antireflection film, and the distance between the laser input window 5 and the laser output window 9 is 1m.
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, and the maximum is 20Hz. When in use, 1064nm pulse laser is incident into the input light guide section 4 through the laser input window 5, sequentially passes through the first gas guide window 6, the light passing section 102 and the second gas guide window 7, then is incident into the output light guide section 8, and then is output through the laser output window 9, wherein 1064nm laser is focused at the middle position of the light passing section 102 after passing through the laser input window 5 and is in high-pressure CO with a focus area 2 The action generates stimulated raman scattering, and 1029nm stimulated raman scattered light is generated, and the stimulated raman laser light and the rest 1064nm pump light are emitted through the laser output window 9.
When the air flow driving device 2 does not rotate, high-pressure CO2 gas in the gas circulation main pipeline 1 does not flow, and when the laser repetition frequency is 1Hz, the embodiment can normally and stably work, the laser Raman conversion efficiency is not reduced along with time, and the output Raman laser beam does not shake or deform. 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, the stimulated Raman laser spot also has obvious deformation, and when the repetition frequency of the laser is increased again, the stimulated Raman laser is seriously degraded or even cannot work 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: based on flow N 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 driving device 2 (axial flow fan) 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 gas driving device 2 (axial flow fan) is controlled to control the gas flow rate so as to adapt to different heat dissipation requirements, and the first flow guiding balance pipe 3 and the second flow guiding balance pipe 10 respectively communicate the gas circulation main pipeline 1 with the input light guiding section 4 and the output light guiding section 8, so as to ensure that the two sides of the first gas flow guiding window 6 are pressed consistently and the two sides of the second gas flow guiding window 7 are pressed consistently.
In this embodiment, the first gas guiding window 6 and the second gas guiding window 7 are both fused silica plates with thickness of 2mm, the included angle α between the first gas guiding window 6 and the central axis of the passing section 102 is 58 degrees and symmetrically arranged to compensate the deflection of light caused by laser passing through the gas guiding window, the laser input window 5 is a fused silica planoconvex lens, the diameter is d=25mm, the focal length is 0.8m, both sides are coated with 532nm antireflection film and 607nm high reflection film, the laser output window 9 is a fused silica plane mirror, both sides are coated with 532nm antireflection film and 607nm antireflection film, and the distance between the laser input window 5 and the laser output window 9 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. When in use, 532nm pulse laser is incident into the input light guide section 4 through the laser input mirror (5), sequentially passes through the first gas guide window 6, the light transmission section 102 and the second gas guide window 7, then is incident into the output light guide section 8, and then is output through the laser output window 9, wherein 532nm laser is focused at the middle position of the light transmission section after passing through the laser input window 5 and is in high-voltage N with a focus area 2 The action generates stimulated raman scattering, generates 607nm stimulated raman scattered light, and the stimulated raman laser light and the rest 532nm pump light are emitted through the laser output window 9.
When the air flow driving device 2 does not rotate, the high pressure N in the air circulation main 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 is increased again, the stimulated Raman laser is seriously degraded or even can not be degraded within a few secondsWork is performed.
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 (6)
1. A pipeline type flowing gas stimulated Raman scattering frequency conversion device is characterized in that: the gas circulation main pipeline (1) and the gas circulation driving device (2) are included, the gas circulation main pipeline (1) comprises a gas circulation driving section (101), a light-transmitting section (102) and a connecting section (104), two ends of the gas circulation driving section (101) and two ends of the light-transmitting section (102) are respectively communicated through the connecting section (104) on the corresponding side, the gas circulation driving section (101) is provided with the gas circulation driving device (2), one end of the light-transmitting section (102) is provided with an input light guide section (4) and the other end is provided with an output light guide section (8), a first end pipe (1021) is arranged on the input light guide section (4) and connected with the connecting section (104) on the corresponding side, a second end pipe (1022) is arranged on the output light guide section (8) and connected with the connecting section (104) on the corresponding side, a laser input window (5) is arranged at an inlet of the input light guide section (4), a laser output window (9) is arranged at an outlet of the output light guide section (8), a first gas guide window (6) is arranged in the input light guide section (4), a first gas guide window (7) is arranged in the output light guide section (8), the first gas guide window (7) is arranged symmetrically, the first gas guide window (7) and the second gas guide window (7) is arranged symmetrically, the first end pipe (1021) is provided with a first diversion balance pipe (3) at the outer side and is communicated with the input light guide section (4), and the second end pipe (1022) is provided with a second diversion balance pipe (10) at the outer side and is communicated with the output light guide section (8).
2. The pipeline type flowing gas stimulated raman scattering frequency conversion device according to claim 1, wherein: the gas circulation main pipeline (1) is provided with a bent pipe section (103), and two ends of the gas flow driving section (101) are respectively connected with a connecting section (104) at the corresponding side through the bent pipe section (103).
3. The pipeline type flowing gas stimulated raman scattering frequency conversion device according to claim 1, wherein: the first gas guiding window (6) is located below the first end pipe (1021), the second gas guiding window (7) is located below the second end pipe (1022), and gas flows along the first gas guiding window (6) and the second gas guiding window (7) in a turning mode.
4. A pipeline flowing gas stimulated raman scattering variable frequency device according to claim 1 or 3, wherein: the included angle between the first gas flow guiding window (6) and the central axis of the light transmitting section (102) and the included angle between the second gas flow guiding window (7) and the central axis of the light transmitting section (102) are both alpha, and the alpha is 45-65 degrees.
5. The pipeline type flowing gas stimulated raman scattering frequency conversion device according to claim 1, wherein: the laser input window (5) is a focusing lens, pumping laser antireflection films and Raman laser high-reflection films are plated on two sides of the laser input window (5), and pumping laser and Raman laser antireflection films are plated on two sides of the laser output window (9).
6. The apparatus for stimulated raman scattering frequency conversion of a pipeline flowing gas of claim 5, wherein: the focal length of the laser input window (5) is f, the distance between the laser input window (5) and the laser output window (9) is L, and f and L are more than or equal to 0.45L and less than or equal to 0.6L.
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| CN202010958979.9A CN114188802B (en) | 2020-09-14 | 2020-09-14 | Pipeline type flowing gas stimulated Raman scattering frequency conversion device |
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| CN202010958979.9A CN114188802B (en) | 2020-09-14 | 2020-09-14 | Pipeline type flowing gas stimulated Raman scattering frequency conversion device |
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| CN114188802A CN114188802A (en) | 2022-03-15 |
| CN114188802B true CN114188802B (en) | 2023-11-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872575A (en) * | 2012-12-10 | 2014-06-18 | 中国科学院大连化学物理研究所 | Confocal unsteady cavity gas Raman laser of YAG pump |
| CN107492778A (en) * | 2017-09-11 | 2017-12-19 | 安徽科创中光科技有限公司 | Low pressure excited Raman light-source system device |
| CN207038914U (en) * | 2017-06-28 | 2018-02-23 | 贵阳菲镭泰克技术有限公司 | The dielectric gas of CO2 radio frequency lasers accelerates reflux |
| CN109507169A (en) * | 2018-12-29 | 2019-03-22 | 广州玉科仪器有限公司 | Gas analysis system and gas analysis auxiliary device |
| 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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| FR2632461A1 (en) * | 1980-08-20 | 1989-12-08 | Cilas | Gas-circulation laser device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872575A (en) * | 2012-12-10 | 2014-06-18 | 中国科学院大连化学物理研究所 | Confocal unsteady cavity gas Raman laser of YAG pump |
| CN207038914U (en) * | 2017-06-28 | 2018-02-23 | 贵阳菲镭泰克技术有限公司 | The dielectric gas of CO2 radio frequency lasers accelerates reflux |
| CN107492778A (en) * | 2017-09-11 | 2017-12-19 | 安徽科创中光科技有限公司 | Low pressure excited Raman light-source system device |
| 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 |
| CN109507169A (en) * | 2018-12-29 | 2019-03-22 | 广州玉科仪器有限公司 | Gas analysis system and gas analysis auxiliary device |
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