Coaxial laser with wavelength calibration and light source core thereof

A technology of coaxial lasers and lasers, which is applied to lasers, laser components, semiconductor lasers, etc., can solve the problems of lasers not being able to self-calibrate their wavelength, poor wavelength stability, and poor self-calibration control accuracy, and achieve high temperature stability. Large thermal inertia, reducing the effect of temperature control time delay

Pending Publication Date: 2019-06-28
席金波
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a coaxial laser with its own wavelength calibration and its light source core to solve the problem that the existing laser cannot perform wavelength self-calibration and the self-calibration control accuracy is poor. Technical problem of poor wavelength stability

Method used

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  • Coaxial laser with wavelength calibration and light source core thereof
  • Coaxial laser with wavelength calibration and light source core thereof
  • Coaxial laser with wavelength calibration and light source core thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0051] Embodiment one, as Picture 1-1 and Figure 1-2 As shown, a coaxial laser light source core with its own wavelength calibration includes a TO tube base 1, a TEC cooler 2 arranged on the upper surface of the TO tube base 1, and a heat conduction heat transfer device arranged on the upper surface of the TEC cooler 2. The spacer 3, the aluminum nitride spacer 4 arranged on the upper surface of the heat conduction spacer 3, and the laser chip 5 and the thermistor 6 respectively arranged on the upper surface of the aluminum nitride spacer 4;

[0052] It also includes a TO pin 7 that is provided through the TO tube socket, and the TEC cooler 2, the laser chip 5 and the thermistor 6 are all electrically connected to the TO pin 7, and the The main optical axis of the laser chip 4 is coaxial with the central axis of the TO socket 1;

[0053] The TEC refrigerator 2 includes a temperature-controlling cold surface and a heat-dissipating heat surface, the upper surface of the TEC r...

Embodiment 2

[0070] Embodiment two, such as Figure 4 As shown, a coaxial laser with its own wavelength calibration includes a coaxial laser source core 10 in the present invention, and also includes a tube body 11, and the coaxial laser source core 10 is fixedly welded on the tube body 11 One end inside and the TO pin 7 extends out of the tube body 11;

[0071] It also includes a coupling lens 12, an optical isolator 13, and a half-reflective sheet 14 that are fixedly welded inside the tube body 11, and the coupling lens 12, the optical isolator 13, and the half-reflective sheet 14 are sequentially coupled with the optical path of the coaxial laser source core 10, the main optical axis of the optical isolator 13 and the coupling lens 12 is coaxial with the central axis of the coaxial laser source core 10, and the semi-transparent The semi-reflective sheet 14 forms an angle of 45° with the central axis of the coaxial laser light source core 10;

[0072] Also includes a photodetector 15 w...

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Abstract

The invention relates to a coaxial laser with wavelength calibration and a light source core thereof. The coaxial laser comprises a TO tube base, a TEC refrigerator, heat conduction cushion blocks, analuminum nitride cushion block, a laser chip, a thermistor and a TO pin. The TEC refrigerator, the laser chip and the thermistor are all electrically connected with the TO pin. The main optical axisof the laser chip is coaxial with the central axis of the TO tube base. The TEC refrigerator comprises a temperature control cold face and a heat dissipation hot face. The heat conduction cushion blocks are welded to the temperature control cold face. The heat conduction cushion blocks comprise a first cushion block and a second cushion block. The first cushion block is fixedly arranged on the upper surface of the second cushion block. The second cushion block is arranged on the upper surface of the TEC refrigerator. The thermal diffusion coefficient of a material for manufacturing the first cushion block is greater than 40mm <2>/s. The thermal diffusion coefficient of a material for manufacturing the second cushion block is less than 10mm <2>/s. The invention not only effectively solves the problem of poor indicating value stability of the existing coaxial laser, but also truly realizes the wavelength self-calibration function. The coaxial laser effectively improves the TDLAS gas detection precision, and is more suitable for a TDLAS gas detection system.

Description

technical field [0001] The invention relates to the field of gas detection, in particular to a coaxial laser with wavelength calibration and its light source core. Background technique [0002] The gas content real-time on-line detection system based on TDLAS (Tunable Semiconductor Laser Absorption Spectroscopy) technology measures the content of the corresponding gas through the absorption of laser light of a specific wavelength by the gas. It is a new generation of advanced gas detection technology with high sensitivity and fast response. This technology has high measurement accuracy, up to ppm (one millionth) level; high accuracy, can detect specific component gases in the mixed gas; fast response speed, up to millisecond response level; using optical detection, Anti-interference and explosion-proof characteristics; no need for frequent calibration and other advantages, it can be used for flammable and explosive gas detection. [0003] Among them, in order to achieve hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/02H01S5/022H01S5/024G01N21/39G01N21/01
Inventor 宋子毅
Owner 席金波
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