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Layer combined laser crystal

A technology combining lasers and laser crystals, applied in lasers, laser parts, phonon exciters, etc., can solve the problem of particle number inversion difficulty, limit laser power, etc., to improve heat dissipation efficiency, enhance heat dissipation effect, and increase thickness Effect

Inactive Publication Date: 2005-05-04
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome that in the existing quasi-three-level system, there is a Boltzmann particle number distribution at the lower energy level of the laser, and the number of particles at the lower energy level of the laser increases sharply with the increase of temperature, making it difficult to realize the particle number inversion , and in the traditional experiment, in order to refrigerate, the laser crystal can only be cut very thin, which limits the shortcoming of the output laser power; the second purpose of the present invention can also be combined into one by using different laser crystals, and Simultaneously output lasers with multiple wavelengths; thus the present invention provides a layered laser device for high-power output that uses multi-layer heat-dissipating substances and laser crystals, which greatly increases the heat dissipation effect and increases the length of the laser crystal. combined laser crystal

Method used

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Experimental program
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Effect test

Embodiment 1

[0019] according to figure 2 A layered composite laser crystal of the present invention consisting of 5 heat-dissipating substances and 4 laser crystals is made. Heat dissipation material 1 is white YAG, whose size is φ5mm×thickness 2mm thin slice; heat dissipation material 3 is white YAG, whose size is φ5mm×thickness 1mm thin slice; laser crystal 2 is Nd:YAG with Nd ion doping concentration of 1.1%. , a sheet with a size of φ5mm×thickness 1.5mm; heat dissipation material 1 and laser crystal 2 are cross-stacked and optically glued together as shown in the figure, and double anti-reflection coatings of 808nm and 946nm are coated on the upper and lower ends of the layered combined laser crystal.

[0020] The layered composite laser crystal is used in a resonant cavity that outputs 946nm, and when the pump light pumps the new layered composite laser crystal from the front, it can output high-power 946nm laser.

Embodiment 2

[0022] according to image 3 Make a layered combined laser crystal, including 5 pieces of heat dissipation material 1 using white YAG, whose size is φ5mm×1mm thick; 2 pieces of laser crystal 2 choose Nd:YAG with Nd ion doping concentration of 1.0%, and its size is φ5mm× Thickness 1mm; 2 pieces of laser crystal 4 choose Nd:YVO with Nd ion doping concentration of 0.5% 4 , the size is φ5mm×thickness 1mm laser crystal sheet; heat dissipation material 1 and laser crystal 2 and 4 are optically glued together as shown in the figure, and the two ends of the layered combination laser crystal are coated with 808nm, 914nm and 946nm anti-reflection coatings.

[0023] The layered combination laser crystal is used in a resonant cavity that outputs 914nm and 946nm, and when the pump light pumps the new layered combination laser crystal from the front, it can simultaneously output 914nm and 946nm lasers.

Embodiment 3

[0025] according to Figure 4 Make a layered combined laser crystal, heat dissipation material 1 is fused silica, its size is φ5mm×thickness 1mm; laser crystal 2 is Yb:YAG with Yb ion doping concentration of 13%, its size is φ5mm×thickness 1mm; Substance 1 and laser crystal 2 are optically glued together as shown in the figure, and the two ends of the layered composite laser crystal are coated with 940nm and 1030nm double anti-reflection coatings.

[0026] The layered composite laser crystal is used in a resonant cavity that outputs 1030nm, and when the pump light pumps the new layered composite laser crystal from the front, it can output high-power 1030nm laser.

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Abstract

The invention relates to a layered combination laser crystal. It includes: heat dissipation material, laser crystal; its feature is: laser crystal is a sheet of one millimeter or less, N pieces of laser crystal sheet and M sheet or M+1 sheet of heat dissipation material are interleaved to form multiple layers and bonded with optical glue. One, where N and M are both positive integers greater than 2. The crystal adopts three-dimensional multi-layer heat dissipation, which overcomes the disadvantage of difficult heat dissipation of laser crystals in the original technology, and has a simple structure, which provides an important way for the heat dissipation of laser crystals. The crystal is used in high-power output laser devices, and its output power can reach several watts to tens of watts, realizing high-efficiency and high-power laser output, and is widely applicable to continuous wave and quasi-continuous wave, which is the practical application of high-power lasers. It opens up broad prospects and can be widely used in military, scientific research, entertainment, medical and other fields.

Description

technical field [0001] The invention relates to a laser crystal, in particular to a layered combination laser crystal used in a high-power output laser device. Background technique [0002] Usually laser crystal heat dissipation is external refrigeration such as water cooling, air cooling or semiconductor refrigeration. In the quasi-three-level system, since the crystal temperature directly affects the number of lower-level particles, the laser used in the traditional quasi-three-level system The thickness of the crystal is very thin, generally about 2mm, which is far lower than that of crystals of other energy level systems (about 10mm), so the output power of the traditional quasi-three-level system is not high, only watt level. In recent years, the heat dissipation method has been improved to a certain extent, and a laser crystal with a sandwich structure has been produced. For example, P. Zeller et al. published "Eficient, multiwatt, continuous...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/042H01S3/16
Inventor 李瑞宁许祖彦林学春崔大复毕勇王桂玲姚爱云冯衍汪家升张鸿博张杰巩华荣徐贵昌
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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