Influence of high power laser thermal effect on beam combination system

被引：3

作者：

Sun, Yi ^{[1
,2
]}

Gao, Yun-Guo ^{[1
]}

Shao, Shuai ^{[1
]}

机构：

[1] Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun

[2] University of Chinese Academy of Sciences, Beijing

来源：

Guangxue Jingmi Gongcheng/Optics and Precision Engineering | 2015年 / 23卷 / 11期

关键词：

Beam biased; Beam combination system; Laser jamming; Laser thermal effect; Zernike fitting;

D O I：

10.3788/OPE.20152311.3097

中图分类号：

学科分类号：

摘要：

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 λ/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. © 2015, SCIENCE PRESS. All right reserved.

引用

页码：3097 / 3106

页数：9

共 15 条

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