A multi-chamber gas pool

A multi-gas chamber and gas pool technology, applied in the field of laser frequency conversion, can solve the problems of rising and hot gas with small specific gravity, and reduce the quality of the output beam, so as to achieve the effects of reducing heat accumulation, high work efficiency, and saving manpower

Active Publication Date: 2022-01-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Gas-stimulated Raman is a method to obtain new wavelengths. During the interaction between the laser and the medium, each Stokes photon will generate a vibrational excited state particle, and these excited state particles will relax back to the A large amount of heat will be released in the ground state. When the thermal effect in SRS is serious, because the hot gas will rise due to the small specific gravity, the refractive index of the upper part of the medium will be smaller than that of the lower part. At this time, the entire beam will diverge along the The direction with a large refractive index of the medium (that is, the bottom) is deflected, and usually the spot will appear as an upwardly curved crescent, reducing the quality of the output beam

Method used

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  • A multi-chamber gas pool
  • A multi-chamber gas pool
  • A multi-chamber gas pool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, a multi-chamber gas pool includes a window (1), a rotating bearing (2), a gas pool bracket (3), a barometer (4), a ventilation valve (5), a rotating gear (6), and multiple Gas chamber stainless steel pool body (7), the two ends of the multi-gas chamber stainless steel pool body (7) are connected to the gas pool bracket (3) through rotating bearings (2), and there are 6 internal arrays of the multi-gas chamber stainless steel pool body (7) Independent air chambers, windows (1) are installed at both ends of the six air chambers, and the six air chambers are equipped with air pressure gauges (4) and ventilation valves (5); the rotating gears (5) are located The outer side of the multi-air chamber pool body (7) is distributed radially and circumferentially.

[0025] The technical solution is: use a high-repetition laser with a wavelength of 1064nm, a spot diameter of 6mm, and a repetition rate of 100Hz as the incident laser. The gas pool contains...

Embodiment 2

[0027] Such as figure 1 As shown, a multi-chamber gas cell, the technical solution is: use a high repetition rate laser with a wavelength of 1064nm, a spot diameter of 6mm, and a repetition rate of 100Hz as the incident laser. The gas cell contains 6 independent gas cells, and each gas cell A plano-convex window with a diameter of 10mm and a front and rear window thickness of 10mm. The front and rear lens windows are confocal, and the sum of the focal lengths of the two front and rear lenses is equal to the length of the independent air chamber. The material is quartz, and the inside of the air chamber is filled with 2MPa high Pure methane gas. First let the incident laser pass completely through one of the gas chambers, and then start the drive motor to rotate the gas cell at a certain speed. By adjusting the speed, the rotation interval of each gas chamber is an integer multiple of the pulse interval of the incident laser. Therefore, each The independent air chamber rotates...

Embodiment 3

[0029] Such as figure 1 As shown, a multi-chamber gas cell, the technical solution is: use a high repetition rate laser with a wavelength of 532nm, a spot diameter of 10mm, and a repetition rate of 50Hz as the incident laser. The gas cell contains 4 independent gas cells, and each gas cell The diameter is 15mm, the thickness of the front and rear windows is 10mm, the material is quartz entrance window with anti-reflection coating @532nm, exit window with anti-reflection coating @495nm&463nm&435nm&532nm&624nm&683nm, each gas chamber is filled with 3MPa, 2MPa, 1MPa, 0.5 MPa high-purity carbon dioxide gas. First let the incident laser pass completely through one of the gas chambers, and then start the drive motor to rotate the gas cell at a certain speed. By adjusting the speed, the rotation interval of each gas chamber is an integer multiple of the pulse interval of the incident laser. Therefore, each The independent air chamber rotates after passing through one or more laser p...

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Abstract

The invention discloses a multi-gas chamber gas pool, which comprises a window, a rotating bearing, a gas pool bracket, an air pressure gauge, a ventilation valve, a rotating gear, and a multi-gas chamber stainless steel pool body. The multi-gas chamber stainless steel pool body consists of two brackets. The support, the bracket is connected with the gas pool body through the rotating bearing, the outer design of the gas pool is equipped with rotating gears, and the external drive device makes the gas pool rotate at a certain speed through the gears, and the gas pool is designed with multiple independent air chambers, and each air chamber is installed at the front and back There are windows, vent valves and air pressure gauges. The incident laser light passes through one of the gas chambers. After the drive device is turned on, the Raman cell rotates, and the gas medium is changed without changing the optical path. The invention has a simple and compact structure, is convenient and quick to replace the gas medium by cooperating with the driving device, can reduce the thermal effect of the incident light in the optical path, or quickly switch the working medium, and has strong practical applicability.

Description

technical field [0001] The invention belongs to the field of laser frequency conversion, and in particular relates to a multi-chamber gas pool. Background technique [0002] Gas-stimulated Raman is a method to obtain new wavelengths. During the interaction between the laser and the medium, each Stokes photon will generate a vibrational excited state particle, and these excited state particles will relax back to the A large amount of heat will be released in the ground state. When the thermal effect in SRS is serious, because the hot gas will rise due to the small specific gravity, the refractive index of the upper part of the medium will be smaller than that of the lower part. At this time, the entire beam will diverge along the The direction with a large refractive index of the medium (that is, the bottom) is deflected, and usually the spot will appear as an upwardly curved crescent, which will reduce the quality of the output beam. Common methods to reduce the impact of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/30H01S3/04
CPCH01S3/305H01S3/04
Inventor 李仲慧郭敬为蔡向龙郑天成沈陈诚刘金波
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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