激光介质长度对Tm:YAG激光器波长调谐的理论分析与数值模拟

王彩丽; 谢仕永; 杜仕峰; 刘辉; 许阳蕾; 张敬; 许祖彦

doi:10.3788/OPE.20172513.0020

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激光介质长度对Tm:YAG激光器波长调谐的理论分析与数值模拟

现代应用光学 | 更新时间：2020-08-13

- 激光介质长度对Tm:YAG激光器波长调谐的理论分析与数值模拟
- Theoretical analysis and numerical simulation for wavelength switchable Tm:YAG laser modulated by Tm:YAG crystal length
- 光学精密工程 2017年25卷第10s期页码：20-25
- 作者机构：
  
  1. 中国建筑材料科学研究总院北京,100024
  2. 中国科学院理化技术研究所激光物理与技术研究中心北京,100190
- 作者简介：
- 基金信息：
  
  中国建筑材料科学研究总院前沿探索基金资助项目（No.YX-91）()
- DOI：10.3788/OPE.20172513.0020
  中图分类号： TN248.1
- 收稿日期：2017-05-06，
  
  修回日期：2017-06-11，
  
  纸质出版日期：2017-11-25
- 稿件说明：
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王彩丽, 谢仕永, 杜仕峰等. 激光介质长度对Tm:YAG激光器波长调谐的理论分析与数值模拟[J]. 光学精密工程, 2017,25(10s): 20-25

WANG Cai-li, XIE Shi-yong, DU Shi-feng etc. Theoretical analysis and numerical simulation for wavelength switchable Tm:YAG laser modulated by Tm:YAG crystal length[J]. Editorial Office of Optics and Precision Engineering, 2017,25(10s): 20-25
王彩丽, 谢仕永, 杜仕峰等. 激光介质长度对Tm:YAG激光器波长调谐的理论分析与数值模拟[J]. 光学精密工程, 2017,25(10s): 20-25 DOI： 10.3788/OPE.20172513.0020.

WANG Cai-li, XIE Shi-yong, DU Shi-feng etc. Theoretical analysis and numerical simulation for wavelength switchable Tm:YAG laser modulated by Tm:YAG crystal length[J]. Editorial Office of Optics and Precision Engineering, 2017,25(10s): 20-25 DOI： 10.3788/OPE.20172513.0020.

摘要

从理论和实验两个方面，对比分析激光介质长度和晶体温度对侧面泵浦激光器泵浦阈值的影响，通过增加激光介质长度或改变晶体温度可实现激光输出波长从2.02

m跳变到2.07

m。首次定量计算出侧面泵浦Tm：YAG激光器输出波长发生红移所对应的激光介质长度和晶体温度，如果输出耦合率固定为5%，晶体温度为281 K时，当激光介质长度大于85 mm时，此时具有较小重吸收损耗的2.07

m谱线会优先起振，激光器的波长为2.07

m。实验方面，当激光介质长度为69 mm时，Tm：YAG激光器的输出波长为2.02

m。当激光介质长度为138 mm时，激光器的输出波长为2.07

m，实验结果和理论分析一致。

Abstract

Based on the analysis of quasi-three-level side pumped Tm:YAG laser system

the dependence of the laser wavelength was studied theoretically and experimentally

which shows central wavelength is switchable between 2.07 and 2.02

m with different Tm:YAG crystal lengths or rod temperatures. The length of the laser medium corresponding to the wavelength red shift was calculated quantitatively. The laser oscillation at 2.02

m with larger stimulated emission sections is suppressed when the crystal length is larger than~85 mm with a 5% output coupling

then an efficient side-diode-pumped rod Tm:YAG laser operating at 2.07

m is realized. The experimental results show that the wavelength of the single-module Tm:YAG laser with Tm:YAG crystal length of 69 mm is located at 2.02

while the wavelength of two-modules Tm:YAG laser with the total Tm:YAG crystal length of 138 mm is located at 2.07

m. The experiments confirm the accuracy of the model.

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Keywords

references

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