快反镜在高功率连续激光辐照下的热性能分析
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摘要
为了研究高功率连续激光辐照过程中快反镜的热性能变化问题,文中利用多物理场仿真分析软件建立了融凝石英(fused silica)、微晶(zerodur)、碳化硅(SiC)三种材料制作的快反镜传热学和结构力学耦合非稳态模型,通过泽尼克多项式算法对高功率激光辐照快反镜热应力下的光学波前进行拟合。研究结果表明:在同等激光功率辐照条件下,微晶材料制作的快反镜温升最小,形变最小。根据仿真结果优选微晶作为快反镜镜体材料,基于泽尼克多项式对快反镜波前热畸变进行仿真分析,计算得到波前热像差以活塞、球差、离焦等为主导,可为波前校正工程应用提供理论参考。
In order to study the thermal characteristic of fast steering mirror during the working process of high power CW laser, a time-dependent fast steering mirror model coupled with heat transfer and structure mechanic was established to calculate the distribution of temperature, thermal deformation and thermal stress by finite element software, and the material was fused silica, zerodur and sic respectively.The wave front of fast steering mirror was fitted by Zernike polynomial algorithms. The results indicate that under the same laser power irradiation conditions, the minimum temperature rising and thermal distortion of the three material is zerodur. By comparison, zerodur material is optimized as fast steering mirror, and its dominant thermal aberration are piston, spherical aberration and defocus, which can provide wavefront correction to theoretical reference in the field of engineering application.
In order to study the thermal characteristic of fast steering mirror during the working process of high power CW laser, a time-dependent fast steering mirror model coupled with heat transfer and structure mechanic was established to calculate the distribution of temperature, thermal deformation and thermal stress by finite element software, and the material was fused silica, zerodur and sic respectively.The wave front of fast steering mirror was fitted by Zernike polynomial algorithms. The results indicate that under the same laser power irradiation conditions, the minimum temperature rising and thermal distortion of the three material is zerodur. By comparison, zerodur material is optimized as fast steering mirror, and its dominant thermal aberration are piston, spherical aberration and defocus, which can provide wavefront correction to theoretical reference in the field of engineering application.
引文
[1]W ang Hengkun, Zhang Guoyu, Guo Lihong, et al. High performance fast steering mirror for beam controI of vehicular high energy laser system[J]. Optics and Precision Engineering, 2012, 20(12):336-341.(in Chinese)王恒坤,张国玉,郭立红,等.高精度动载体激光发射系统光束控制反射镜[J].光学精密工程, 2012, 20(12):336-341.
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[4]Liu Wenguang, Rao Peng, Hua Weihong, et al. Effects of thermal distortion of Si mirror irradiated by nonuniformity laser intensity on laser propagation[J]. High Powe Laser and Particle Beams, 2008, 20(10):1615-1619.(in Chinese)刘文广,饶鹏,华卫红,等.非均匀激光辐照下硅镜热变形对光束传输特性的影响[J].强激光与粒子束, 2008, 20(10):1615-1619.
[5]Zhang Kuo, Chen Fei, Li Ruolan, et al. Analysis on thermal performance of output window in high power CO2 laser[J]. Infrared and Laser Engineering, 2017,46(2):0205005.(in Chinese)张阔,陈飞,李若斓,等.大功率CO2激光器输出窗口热性能分析[J].红外与激光工程, 2017, 46(2):0205005.
[6]Born, Wolf. Principles of Optics[M]. 7th ed. Yang Xiasun, translated. Beijing:Publishing House of Electronics Industry, 2013.(in Chinese)马科斯·玻恩,埃米尔·沃耳夫.光学原理[M].第七版.杨葭荪,译.北京:电子工业出版社, 2013.
[7]Xu Huaizhi. Infrared Optical Material[M]. 2nd ed.Beijing:National Defense Industry Press, 2015.(in Chinese)徐怀之.红外光学材料[M]. 2版.北京:国防工业出版社,2015.
[2]Qi Weizong, Huang Wei, Zhang Bin, et al. Finite element analysis of thermal distortion of infrared CW laser reflectors[J]. High Power Laser and Particle Beams, 2004, 16(8):953-956.(in Chinese)齐文宗,黄伟,张彬,等.红外连续激光反射镜热畸变的有限元分析[J].强激光与粒子束, 2004, 16(8):953-956.
[3]Zhang Yaoping, Fan Junqi, Long Guoyun, et al. Finite element simulation of thermal distortions of deformable mirror with laser irradiation[J]. Infrared and Laser Engineering, 2016, 45(11):1136002.(in Chinese)张耀平,樊峻棋,龙国云,等.变形镜在激光辐照下热畸变有限元模拟[J].红外与激光工程, 2016, 45(11):1136002.
[4]Liu Wenguang, Rao Peng, Hua Weihong, et al. Effects of thermal distortion of Si mirror irradiated by nonuniformity laser intensity on laser propagation[J]. High Powe Laser and Particle Beams, 2008, 20(10):1615-1619.(in Chinese)刘文广,饶鹏,华卫红,等.非均匀激光辐照下硅镜热变形对光束传输特性的影响[J].强激光与粒子束, 2008, 20(10):1615-1619.
[5]Zhang Kuo, Chen Fei, Li Ruolan, et al. Analysis on thermal performance of output window in high power CO2 laser[J]. Infrared and Laser Engineering, 2017,46(2):0205005.(in Chinese)张阔,陈飞,李若斓,等.大功率CO2激光器输出窗口热性能分析[J].红外与激光工程, 2017, 46(2):0205005.
[6]Born, Wolf. Principles of Optics[M]. 7th ed. Yang Xiasun, translated. Beijing:Publishing House of Electronics Industry, 2013.(in Chinese)马科斯·玻恩,埃米尔·沃耳夫.光学原理[M].第七版.杨葭荪,译.北京:电子工业出版社, 2013.
[7]Xu Huaizhi. Infrared Optical Material[M]. 2nd ed.Beijing:National Defense Industry Press, 2015.(in Chinese)徐怀之.红外光学材料[M]. 2版.北京:国防工业出版社,2015.