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A multi-wavelength pumped temperature-free solid-state laser and multi-wavelength selection method

A solid-state laser and multi-wavelength technology, applied in the laser field, achieves the effects of stable absorption conversion efficiency, insensitivity to environmental temperature changes, and stable laser power

Active Publication Date: 2019-01-25
ARMY ENG UNIV OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on multi-wavelength LD pumped temperature-free lasers based on long absorption distance

Method used

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  • A multi-wavelength pumped temperature-free solid-state laser and multi-wavelength selection method
  • A multi-wavelength pumped temperature-free solid-state laser and multi-wavelength selection method
  • A multi-wavelength pumped temperature-free solid-state laser and multi-wavelength selection method

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Embodiment 1

[0040] Embodiments of the present invention are described with reference to the accompanying drawings. The laser includes a pump source LD array heat sink 1, a multi-wavelength LD array 2, a pump light shaping mirror 3, a pump light coupling mirror 4, a 1064nm total reflection mirror 5, and an end-face bonding Pure YAG6, Nd:YAG laser gain medium7, Q-switching system8 and 1064nm output mirror9. The multi-wavelength LD array 2 is packaged on the pump source LD array heat sink 1 in the package form of G-Stack, and emits multi-wavelength pump light when the laser is working (the multi-wavelength selection method of the multi-wavelength LD array 2 will be described in details in the examples that follow). The light-emitting surface of the multi-wavelength LD array 2 is aligned with the incident end faces of the pump light shaping mirror 3 and the pump light coupling mirror 4. After the multi-wavelength pump light is shaped by the pump light shaping mirror 3, it passes through the p...

Embodiment 2

[0078] According to the method of Embodiment 1, the doping concentration of the Nd:YAG laser gain medium 7 is set to 0.65%, and the absorption lengths are respectively 50 mm and 30 mm. If the multi-wavelength LD array 2 is composed of three wavelengths, the wavelength selection program is set to take one wavelength as a reference, and it varies within the range of 780nm to 830nm, and the variation range of the other two wavelengths is within ±20nm of the reference wavelength. The energy range varies between 0.6 and 1. For the gain medium with an absorption length of 50mm, the set temperature-free temperature range should be greater than 70°C, and for the gain medium with an absorption length of 30mm, the set temperature-free temperature range should be greater than 50°C. The program calculates the laser output energy E according to formula (6) 0 , calculate the absorption efficiency ε according to the formula (4), select the wavelength combination whose pump light absorption ...

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Abstract

The invention discloses a multi-wavelength pumped temperature control-free solid-state laser. A pumped source Laser Diode (LD) array heat sink is provided with a multi-wavelength LD array. A luminescence surface of the multi-wavelength LD array is directed at incident end faces of a pumped light shaping lens and a pumped light coupling lens. After the multi-wavelength pumped light emitted from the multi-wavelength LD array is shaped by the pumped light shaping lens, the multi-wavelength pumped light enters a 1064nm total reflecting lens and an end-face bonding pure YAG and Nd: YAG laser gain medium in turn after being total reflected and coupled in the pumped light coupling lens. A Q-switched system is arranged between the Nd:YAG laser gain medium and a 1064nm output lens. The invention also discloses a multi-wavelength selection method of the multi-wavelength pumped temperature control-free solid-state laser. According to the invention, the laser temperature control-free operation can be realized without temperature control or wavelength locking devices; the absorption conversion efficiency of the pumped light energy is high; the absorption conversion efficiency of the pumped light is stable, and the output laser power at the later period is stable; and the laser output performance is not sensitive to the environment temperature.

Description

technical field [0001] The invention belongs to the field of laser technology, and in particular relates to a multi-wavelength pumped temperature-free solid-state laser, and also relates to a multi-wavelength selection method for a multi-wavelength pumped temperature-free solid-state laser, which is widely used in the fields of national defense, military affairs, and civil use. application value. technical background [0002] Laser diode pumped solid-state laser (Diodes Pumped Solid-State Laser—DPL) has the advantages of long life, high efficiency, high beam quality, high stability, etc. It is a main development direction of solid-state lasers at present. However, the size, weight and power consumption of this laser have not been significantly improved since its invention, and the bottleneck of small and lightweight technology has not been broken, which seriously restricts its application at a higher level and in a wider range. The root cause is that the laser diode (LD) ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/042H01S3/0941H01S3/102
CPCH01S3/042H01S3/0941H01S3/1022
Inventor 程勇刘旭魏靖松谭朝勇朱孟真陈霞
Owner ARMY ENG UNIV OF PLA
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