Influence of high power laser thermal effect on beam combination system

SUN Yi; GAO Yun-guo; SHAO Shuai

doi:10.3788/OPE.20152311.3097

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Influence of high power laser thermal effect on beam combination system

更新时间：2020-08-13

- Influence of high power laser thermal effect on beam combination system
- Optics and Precision Engineering Vol. 23, Issue 11, Pages: 3097-3106(2015)
- 作者机构：
  
  1. 中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
  2. 中国科学院大学北京,中国,100049
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152311.3097
  CLC： TN977;TN243
- Received：20 February 2015，
  
  Revised：27 March 2015，
  
  Published：25 November 2015
- 稿件说明：
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孙毅, 高云国, 邵帅. 高功率激光热效应对合束系统的影响[J]. 光学精密工程, 2015,23(11): 3097-3106

SUN Yi, GAO Yun-guo, SHAO Shuai. Influence of high power laser thermal effect on beam combination system[J]. Editorial Office of Optics and Precision Engineering, 2015,23(11): 3097-3106
孙毅, 高云国, 邵帅. 高功率激光热效应对合束系统的影响[J]. 光学精密工程, 2015,23(11): 3097-3106 DOI： 10.3788/OPE.20152311.3097.

SUN Yi, GAO Yun-guo, SHAO Shuai. Influence of high power laser thermal effect on beam combination system[J]. Editorial Office of Optics and Precision Engineering, 2015,23(11): 3097-3106 DOI： 10.3788/OPE.20152311.3097.

摘要

提出利用镀膜合束的方法对三路光束进行合束用于高功率红外激光合束系统设计。考虑系统中关键元件使用的红外材料ZnSe易受热效应影响

采用光机热耦合分析方法

研究了在温度边界条件固定时

各波段激光所产生的耦合热效应对各路激光波前畸变的影响

同时定性分析了系统中存在的激光偏置热效应。研究结果显示

系统中各波段的激光波前畸变均方根值(RMS)均满足设计要求(各波段波前畸变小于

/8);激光偏置造成的波面高频成分增大了长波激光波前畸变量

但高频成分对系统波前畸变影响依然满足要求;轴向温差可在35 s达到平衡

对光束波前造成主要影响的是各块镜片的面型畸变。根据分析结果搭建了实验平台

利用系统中短波400 W激光进行实验

采集了该条件下的面型并与仿真结果进行了对比

实验结果验证了该分析方法计算结果的准确性。

Abstract

A beam combination method based on the optical coating was proposed for three light paths to design a high power infrared laser multi-band beam combination system. As the ZnSe used as substrate materials of a beam combination mirror was easy to be susceptible to thermal effects

the optical-mechanical-thermal coupling analysis was used to research the influence of coupled thermal effect caused by laser irradiation in different wave bands on laser wavefront distortion of each band under the fixed temperature boundary conditions. Meanwhile

the thermal effect caused by beam biased was analyzed qualitatively. Simulation results show that the wavefront distortion(Root Mean Square

RMS) of each band laser is able to satisfy the design requirements(the wavefront distortion needs to be less than

/8). The high-frequency component increases the distortion of a long wave laser

but it still meets the system requirement. The axial temperature difference reaches the equilibrium after 35 s

so the main factor of wavefront distortion is the surface distortion of every mirror. An experimental testbed was set up based on the analysis results

and the experiments were carried out on a 400 W short wavelength laser. The surface data were obtained and compared with that of the simulation

and the results validate the feasibility of the proposed analytical method.

关键词

Keywords

references

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