高能固体脉冲激光热晕效应相位补偿的数值分析
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摘要
热晕效应是高能激光大气传输最重要的非线性效应之一。利用激光大气传输四维仿真程序,针对高能固体脉冲激光大气传输的非线性热晕效应,采用常规自适应光学系统与随机并行梯度算法自适应光学系统对其相位补偿进行了数值模拟和分析。结果表明:当脉冲宽度1 ms,重复频率10 Hz,单脉冲发射功率500 k W时,常规自适应光学系统补偿效果较好;当脉冲发射功率增加或者重复频率增加时,随机并行梯度下降算法自适应光学系统补偿效果较好。
Thermal blooming is one of the most important nonlinear effects on high energy laser propagation in the atmosphere. By using the four-dimensional codes, adaptive optics systems based on stochastic parallel gradient descent(SPGD) optimization were proposed for compensating thermal blooming of high energy solid pulse laser, and the compensation effects compared with the conventional adaptive optical system. The results show that when the repetition frequency equal to 10 Hz, the pulse peak power is 500 k W, the conventional adaptive optical system is better for compensation. But when the repetition frequency of increases or the pulse peak power is increased, SPGD adaptive optical system is better than conventional adaptive optical system.
Thermal blooming is one of the most important nonlinear effects on high energy laser propagation in the atmosphere. By using the four-dimensional codes, adaptive optics systems based on stochastic parallel gradient descent(SPGD) optimization were proposed for compensating thermal blooming of high energy solid pulse laser, and the compensation effects compared with the conventional adaptive optical system. The results show that when the repetition frequency equal to 10 Hz, the pulse peak power is 500 k W, the conventional adaptive optical system is better for compensation. But when the repetition frequency of increases or the pulse peak power is increased, SPGD adaptive optical system is better than conventional adaptive optical system.
引文
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[8]Sun Zhongtao,Sun Xiaoquan,Zou Jiwei.Numerical analysis of thermal blooming induced by pulsed laser propagation in atmosphere[J].Infrared and Laser Engineering,2007,36(2):189-193.(in Chinese)孙中涛,孙晓泉,邹继伟.脉冲激光大气传输热晕数值分析[J].红外与激光工程,2007,36(2):189-193.
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[10]Wu Wuming,Wu Huiyun,Zhu Jiajian,et al.Numerical analysis of thermal blooming in the atmosphere for highenergy solid-state heat capacity lasers[J].Infrared and Laser Engineering,2009,38(3):445-504.(in Chinese)吴武明,吴慧云,朱家健,等.高能固体热容激光器大气热晕效应数值分析[J].红外与激光工程,2009,38(3):445-504.
[11]Vorontsov M A,Carhart G W.Adaptive optics based in analog parallel stochastic optimization:analysis and experimental demonstration[J].J Opt Soc Am A,2000,17(8):1440-1453.
[12]Yang Huizhen,Li Xinyang,Jiang Wenhan.Simulation and analysis of stochastic parallel gradient descent control algorithm for adaptive optics system[J].Acta Optics Sinica,2007,27(8):1355-1360.(in Chinese)杨慧珍,李新阳,姜文汉.自适应光学系统随机并行梯度下降控制算法仿真与分析[J].光学学报,2007,27(8):1355-1360.
[13]Ma Huimin,Zhang Pengfei,Zhang Jinghui,et al.Stochastic parallel gradient descent algorithm for adaptive optics system[J].High Power Laser and Particle Beams,2010,22(6):1206-1211.(in Chinese)马慧敏,张鹏飞,张京会,等.自适应光学系统随机并行梯度下降算法[J].强激光与粒子束,2010,22(6):1206-1211.
[2]Gebhardt F G.Twenty-five years of thermal blooming:an overview[C]//SPIE,1990,1221:2-25.
[3]Rao ruizhong.Combined effect of turbulence and thermal blooming of laser propagation in atmosphere[J].Infrared and Laser Engineering,2006,35(2):130-134.(in Chinese)饶瑞中.激光大气传输湍流与热晕综合效应[J].红外与激光工程,2006,35(2):130-134.
[4]Karr T J.Thermal blooming compensation instabilities[J].J Opt Soc Am A,1989,6(7):1038-1048.
[5]Wang Yingjian,Wu Yi,Gong Zhiben.Adaptive Optics Phase Compensation for nonlinear thermal blooming[J].Acta Optica Sinica,1995,15(10):1418-1422.(in Chinese)王英俭,吴毅,龚知本.非线性热晕效应自适应光学位相补偿[J].光学学报,1995,15(10):1418-1422.
[6]Wang Yingjian.Some study on the laser propagation in the atmosphere and its phase compensation[D].Hefei:Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,1996.(in Chineses)王英俭.激光大气传输及其相位补偿的若干问题讨论[D].合肥:中国科学院安徽光学精密机械研究所,1996.
[7]Buser R G,Rohde R S.Transient thermal blooming of long laser pules[J].Applied Optics,1975,14(1):51-55.
[8]Sun Zhongtao,Sun Xiaoquan,Zou Jiwei.Numerical analysis of thermal blooming induced by pulsed laser propagation in atmosphere[J].Infrared and Laser Engineering,2007,36(2):189-193.(in Chinese)孙中涛,孙晓泉,邹继伟.脉冲激光大气传输热晕数值分析[J].红外与激光工程,2007,36(2):189-193.
[9]Liao Tianhe,Liu Wei,Gao Qiong.Thermal blooming of repetitively pulsed propagation in different atmospheric models[J].Journal of Applied Optics,2012,33(3):799-803.(in Chinese)廖天河,刘伟,高穹.序列脉冲激光在不同大气模式下的热晕效应研究[J].应用光学,2012,33(3):799-803.
[10]Wu Wuming,Wu Huiyun,Zhu Jiajian,et al.Numerical analysis of thermal blooming in the atmosphere for highenergy solid-state heat capacity lasers[J].Infrared and Laser Engineering,2009,38(3):445-504.(in Chinese)吴武明,吴慧云,朱家健,等.高能固体热容激光器大气热晕效应数值分析[J].红外与激光工程,2009,38(3):445-504.
[11]Vorontsov M A,Carhart G W.Adaptive optics based in analog parallel stochastic optimization:analysis and experimental demonstration[J].J Opt Soc Am A,2000,17(8):1440-1453.
[12]Yang Huizhen,Li Xinyang,Jiang Wenhan.Simulation and analysis of stochastic parallel gradient descent control algorithm for adaptive optics system[J].Acta Optics Sinica,2007,27(8):1355-1360.(in Chinese)杨慧珍,李新阳,姜文汉.自适应光学系统随机并行梯度下降控制算法仿真与分析[J].光学学报,2007,27(8):1355-1360.
[13]Ma Huimin,Zhang Pengfei,Zhang Jinghui,et al.Stochastic parallel gradient descent algorithm for adaptive optics system[J].High Power Laser and Particle Beams,2010,22(6):1206-1211.(in Chinese)马慧敏,张鹏飞,张京会,等.自适应光学系统随机并行梯度下降算法[J].强激光与粒子束,2010,22(6):1206-1211.