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1.5-1.6-micron waveband thin-disk laser

A laser and thin disk technology, applied to the structure/shape of optical resonators, active medium materials, etc., can solve the problems of reducing the absorption efficiency of incident pump light, increasing the complexity of laser system design, and increasing pump light, etc., to achieve The effect of high beam quality, high average power, and efficient average power

Active Publication Date: 2014-08-06
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the thin laser medium reduces the absorption efficiency of the incident pump light, in order to achieve efficient laser operation, it is necessary to increase the number of times the pump light passes through the laser medium, which increases the complexity of the laser system design

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0013] Example 1: 976nm wavelength semiconductor laser pumping Er:YbAl 3 (BO 3 ) 4 Thin disk 1.54 micron laser.

[0014] Using doping 1.5at.%Er 3+ YbAl 3 (BO 3 ) 4 (Er:YbAB) laser crystal. At 976 nm, the absorption coefficient of the laser crystal for the incident pump light parallel to the optical axis is about 180 cm -1 . A c-sliced ​​Er:YbAB thin disk laser medium with a thickness of 90 microns (typically a few square millimeters in end area) was cut and polished from the crystal. Directly coat one end face of the thin disk laser medium with a dielectric film that is highly reflective to both the pump light and the fundamental laser to form a cavity mirror of the laser cavity, and then directly or further coat this end face with a layer of heat-conducting material (such as Indium, tin, etc.) are pasted on the water-cooled (or semi-conductor refrigeration) copper plate as a cooling surface, and the heat generated in the medium is quickly dissipated along the axial d...

example 2

[0015] Example 2: 976nm wavelength diode laser pumped Er:YbAB thin disk 1.54 micron passive Q-switched pulsed laser.

[0016] Directly connect passive Q-switched chips (such as Co 2+ :MgAl 2 o 4 ,Co 2+ : ZnSe, Cr 2+ : ZnSe, etc.) inserted between the non-cooled end face of the thin disk laser medium in Example 1 and the output cavity mirror, the 1.54 micron passive Q-switched thin disk pulsed laser operation can be realized. The output cavity mirror can also be directly plated on the output end face of the Q-switching chip to achieve the same purpose.

example 3

[0017] Example 3: 1.54 micron active Q-switched pulsed laser pumped by a semiconductor laser with a wavelength of 976 nanometers Er:YbAB thin disk.

[0018] The acousto-optic Q-switching module in the 1.5-1.6 micron band is directly inserted between the uncooled end face of the thin-disk laser medium and the output cavity mirror in Example 1, and a 1.54-micron active Q-switched thin-disk pulsed laser can be realized. The output cavity mirror can also be directly plated on the output end face of the acousto-optic Q-switching module to achieve the same purpose.

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PUM

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Abstract

The invention relates to a 1.5-1.6-micron waveband thin-disk laser and belongs to the field of solid laser materials and devices. An Er<3+> and Yb<3+> double-doped RAl3(BO3)4 laser crystal or Er<3+> single-doped YbAl3(BO3)4 laser crystal serves as a gain medium, and the laser crystal is enabled to have the characteristic of high absorption coefficient at wavelength of 976 nanometers by combination of high Yb<3+> ion concentration in the laser crystal. By adoption of the design scheme of the thin-disk laser, influence of medium heat effect is lowered effectively, and 1.5-1.6-micron waveband solid laser operation with high average power, high efficiency and high beam quality is realized under the condition of semiconductor laser pumping at the wavelength of 976 nanometers.

Description

technical field [0001] The invention relates to the field of solid laser materials and devices. Background technique [0002] The biggest problem hindering the development of solid-state lasers to high average output power is the thermal load of the laser medium during optical pumping. The waste heat in the laser medium will cause effects such as thermal lens, thermally induced birefringence and thermal stress, resulting in a reduction in the quality of the laser output beam, saturation and instability of the laser output power, and may even cause the rupture of the laser medium. The design of the thin-disk laser (thin-disk laser) effectively solves the above problems and realizes the solid-state laser operation with high average power, high efficiency and high beam quality (IEEEJ.Sel.Topics Quantum Electron.,2007,13(3 ), pp598-609). So far, the gain medium of thin disk lasers is mainly some Yb 3+ or Nd 3+ The doped laser material realizes laser operation in the 1.0 to 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/16H01S3/08
Inventor 陈雨金黄艺东林炎富黄建华龚兴红罗遵度
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI