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No water-cooled laser

A laser, no water cooling technology, used in the field of lasers, it can solve the problems of limited remote ranging distance, excessive heat, and uniformity affecting the quality of the output light beam, achieving the effect of low power consumption and small size

Active Publication Date: 2015-12-02
11TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they are all water-cooled, because the continuous pumping power is large and the heat generated is large
As a result, pulsed end pumping appeared. The average power of the pump source is low. Conduction cooling or air cooling can be used, which greatly reduces the chance of contamination of the gain crystal or the pump source. The beam quality is less than 1.5, but the single pulse The energy is only 54mJ, which limits the distance of long-range ranging
[0004] Side-pumped slab MOPA without water-cooling laser has simple structure and large output single pulse energy. However, if it is directly pumped by pulsed diode, the uniformity of pump light will affect the beam quality of output light.

Method used

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Experimental program
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Effect test

Embodiment 1

[0040] figure 1 Schematic diagram of the optical path structure of the main oscillator power amplifier without water cooling, such as figure 1 As shown, the water-free cooled laser includes:

[0041] The main oscillator pumping source 1 is used to provide high peak power quasi-CW main oscillator pumping light;

[0042] The main oscillator energy fiber 2 is used to transmit and homogenize the pump light output by the main oscillator pump source 1;

[0043] The main oscillator coupling system 3 is used to couple the pump light transmitted by the main oscillator energy fiber 2 into the main oscillator laser crystal 4;

[0044] The main oscillator laser crystal 4 is used to provide the main oscillator gain;

[0045] The first polarizer 5 is used to polarize the laser output from the main oscillator laser crystal 4, and the polarization direction is the horizontal direction;

[0046] The first quarter-wave plate 6 is used to rotate the laser polarization direction from the firs...

Embodiment 2

[0066] figure 2 It is a schematic diagram of the optical path structure of the water-cooled laser without the main oscillation power amplifier of embodiment 2, as figure 2 Shown, non-water-cooled lasers include:

[0067] Main oscillator pumping source 1; main oscillator energy fiber 2; main oscillator coupling system 3; main oscillator laser crystal 4; first polarizer 5; Cr4+:YAG passive Q-switching crystal 19; plano-concave output mirror 8; Beam expander system 9; first 45° total reflection mirror 10; second 45° total reflection mirror 11; second polarizer 12; second quarter wave plate 13; power amplifier laser crystal 14; power amplifier coupling system 15 ; power amplifier energy fiber 16; power amplifier pump source 17; third polarizer 18.

[0068] The structures, functions and effects of the same components as in the first embodiment are also the same as those in the first embodiment, so no detailed description will be given in this embodiment. The difference between...

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Abstract

The invention discloses a non-water-cooling laser which comprises a master oscillator pumping source (1), a master oscillator energy optical fiber (2), a master oscillator coupled system (3), a master oscillator laser crystal (4), a first polarizing film (5), a first one-fourth wave plate (6), a Pockels box (7), a plano-concave output mirror (8), a bundle expanding system (9), a first 45-degree full reflector (10), a second 45-degree full reflector (11), a second polarizing film (12), a second one-fourth wave plate (13), a power amplifier laser crystal (14), a power amplifier coupled system (15), a power amplifier energy optical fiber (16), a power amplifier pumping source (17) and a third polarizing film (18). The non-water-cooling laser has the advantages of being small in size, low in power consumption and free of a water-cooling full solid state; the conditions of high-peak power large energy and single transverse mode output can be guaranteed and the capacity that external triggering and light emitting time jitters tens of ns can further be guaranteed.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a water-free cooling laser. Background technique [0002] Lasers based on master oscillator power amplifiers (MOPA, Master Oscillator Power-Amplifier), especially end-pumped master oscillator power amplifiers, can not only maintain the high beam quality of the master oscillator, but also ensure high peak power, high conversion efficiency, With large energy output, this type of laser is widely used in laser processing, remote surveying and mapping, space radar and other fields. Semiconductor laser (LD, LaserDiode) as a pump source is widely used in the main oscillator power amplifier because of its compact structure, long life, high energy conversion efficiency, and easy thermal management compared with traditional lamp pumps. Continuous or quasi-continuous semiconductor lasers have been widely used in small and medium power industrial lasers, and pulsed semiconductor lasers have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/024
Inventor 毛小洁秘国江庞庆生邹跃刘铁军
Owner 11TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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