Narrow-linewidth and fast-tuning 2120nm laser light source for hydrogen remote sensing detection

A technology of laser light source and narrow line width, which is applied in the direction of lasers, laser components, electrical components, etc., can solve the problem of difficulty in realizing narrow line width, high-speed tuning of laser operation, difficulty in meeting the index of laser light source for remote sensing detection, and reduced real-time monitoring efficiency. question

Inactive Publication Date: 2021-02-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current semiconductor laser is immature in this band, the output power is very low (<6mW) and the price is very expensive, it is difficult to meet the remote sensing detection laser light source index
Compared with semiconductor lasers, solid-state lasers can directly generate high-power 2120nm lasers using gain media such as Ho:YAG, but it is difficult to achieve narrow linewidth and high-speed tunable laser operation, which greatly reduces the efficiency of real-time monitoring

Method used

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  • Narrow-linewidth and fast-tuning 2120nm laser light source for hydrogen remote sensing detection
  • Narrow-linewidth and fast-tuning 2120nm laser light source for hydrogen remote sensing detection
  • Narrow-linewidth and fast-tuning 2120nm laser light source for hydrogen remote sensing detection

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A narrow-linewidth, fast-tuning 2120nm laser source for remote sensing of hydrogen, such as figure 1 As shown, it includes a pump source, a collimating focusing system 2 and a resonant cavity arranged in sequence along the optical path. The resonant cavity includes an input mirror 3, an output mirror 5, an intermediate mirror 7, a nonlinear optical crystal 4, an F-P etalon 8 and a VBG9;

[0060] The working wavelength of the pump source is 700-980nm; the nonlinear optical crystal 4 is a periodically polarized optical superlattice crystal, the period of the optical superlattice crystal is 20-29 μm, and the temperature of the optical superlattice crystal is controlled at 30- 230°C;

[0061] The pump light output by the pump source is focused on the nonlinear optical crystal 4 after passing through the focusing system and the input mirror 3, and pumps the nonlinear optical crystal 4 to form optical oscillation in the resonant cavity. According to the optical parameter ener...

Embodiment 2

[0089] According to the narrow linewidth and fast tuning 2120nm laser light source provided in Embodiment 1 for remote sensing of hydrogen, the difference is that figure 2 As shown, it includes a pump source, a collimating focusing system 2 and a resonant cavity arranged in sequence along the optical path, and the resonant cavity includes an input mirror 3, a nonlinear optical crystal 4, an F-P etalon 8 and a VBG9;

[0090] The resonant cavity also includes an end mirror 10; in the resonant cavity, the input mirror 3, the nonlinear optical crystal 4 and the end mirror 10 are arranged along the optical path in sequence, and the optical path is divided into two mutually perpendicular optical paths at the input mirror 3, and the input mirror 3 It forms an included angle of 45° with the optical path, and on one of the optical paths, the end mirror 10 is perpendicular to the optical path; the F-P etalon 8 and VBG9 are sequentially arranged on one side of the input mirror 3, and are...

Embodiment 3

[0099] According to the narrow linewidth and fast tuning 2120nm laser light source provided in Embodiment 1 for remote sensing of hydrogen, the difference is that image 3 As shown, it includes a pump source, a collimating focusing system 2 and a resonant cavity arranged in sequence along the optical path, and the resonant cavity includes an input mirror 3, a nonlinear optical crystal 4, an F-P etalon 8 and a VBG9;

[0100] The input mirror 3, nonlinear optical crystal 4, F-P etalon 8 and VBG9 are arranged along the optical path in sequence, and the input mirror 3 and VBG9 are both perpendicular to the optical path,

[0101] After the pump light passes through the collimating and focusing system 2 , the light beam is focused, passed through the input mirror 3 , and then focused into the nonlinear optical crystal 4 . The resonant cavity is a single resonant optical parametric resonant cavity, and the control signal light oscillates in the cavity but does not output, and only ou...

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Abstract

The invention relates to a narrow-linewidth and fast-tuning 2120nm laser light source for hydrogen remote sensing detection, and the light source comprises a pumping source, a collimation focusing system and a resonant cavity which are sequentially arranged along a light path, wherein the resonant cavity comprises an input mirror, a nonlinear optical crystal, an FP etalon and a VBG; the pump lightoutput by the pump source passes through the focusing system and the input mirror and then is focused on the non-linear optical crystal, the non-linear optical crystal is pumped, light oscillation isformed in the resonant cavity, and signal light and idler frequency light are generated. The FP etalon and the VBG are sequentially used for locking the signal light and compressing the line width ofthe signal light, so that the signal light oscillates in the resonant cavity and is not output, and the resonant cavity only outputs 2120 nm idler frequency light. The laser light source provided bythe invention can output 2120nm idler frequency light with high power and narrow linewidth, can realize rapid tuning, and meets the requirements of hydrogen remote sensing detection.

Description

technical field [0001] The invention relates to a narrow-linewidth and fast-tuning 2120nm laser light source for hydrogen remote sensing detection, belonging to the technical field of all-solid-state lasers. Background technique [0002] The gas molecular components in the environment have typical characteristic absorption peaks. According to this characteristic, combined with laser absorption spectroscopy technology, the gas species and concentration can be detected with high sensitivity. Lasers are widely used as light sources for gas detection products due to their advantages such as wide tuning, narrow linewidth, and strong coherence. [0003] As a clean energy source, hydrogen is widely used in production and life. The flammable and explosive physical properties of hydrogen make it necessary to strictly detect hydrogen leakage and hydrogen content in the environment during hydrogen production. However, the current methods for detecting hydrogen concentration generally ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/08H01S3/094H01S3/102
CPCH01S3/08086H01S3/102H01S3/1028H01S3/094042
Inventor 聂鸿坤王菲菲夏金宝张百涛杨克建何京良
Owner SHANDONG UNIV
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