不同传输条件下激光远场光斑特性的模拟分析
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摘要
使用相位屏法模拟了大气湍流效应,获得了不同激光发射孔径和大气相干长度下的激光远场光斑,验证了远场光斑环围半径与大气相干长度及激光发射孔径之间的定标关系。模拟阵列探测器对远场光斑进行采样,并由采样数据计算光斑参数,最终给出了不同激光发射孔径和大气相干长度下测量光斑参数所需的空间分辨力大小。研究结果表明,激光发射孔径与大气相干长度的比值小于6时,测量所需空间分辨力仅由激光发射孔径决定,与大气相干长度之间的相关性不显著。
The atmospheric turbulence effect is simulated by using the phase screen method, and the far-field laser beam spots with different laser apertures and atmospheric coherent lengths are obtained. The calibration relationship among the encircled beam radius of the far field laser beam spot, the laser aperture, and the atmospheric coherent length is verified. The parameters of the far-field laser beam spot are sampled and calculated by the simulated array detector. Finally, the spatial resolution required for measuring the laser beam spot parameters under different laser apertures and atmospheric coherent lengths is given. The results show that when the ratio of the laser aperture to the atmospheric coherent length is less than 6, the correlation between spatial resolution and the atmospheric coherent length is not significant, which is determined only by laser aperture.
The atmospheric turbulence effect is simulated by using the phase screen method, and the far-field laser beam spots with different laser apertures and atmospheric coherent lengths are obtained. The calibration relationship among the encircled beam radius of the far field laser beam spot, the laser aperture, and the atmospheric coherent length is verified. The parameters of the far-field laser beam spot are sampled and calculated by the simulated array detector. Finally, the spatial resolution required for measuring the laser beam spot parameters under different laser apertures and atmospheric coherent lengths is given. The results show that when the ratio of the laser aperture to the atmospheric coherent length is less than 6, the correlation between spatial resolution and the atmospheric coherent length is not significant, which is determined only by laser aperture.
引文
[1]GEBHARDT F G.Atmospheric effects modeling for high energy lasers ystems[C]//Proc of SPIE,1995,2 502:101-110.
[2]苏毅,万敏.高能激光系统[M].北京:国防工业出版社,2004.(SU Yi,WAN Min.High Energy Laser System[M].Beijing:National Defense Industry Press,2004.)
[3]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.(RAO Rui-zhong.Combined effect of turbulence and thermal blooming of laser propagation in atmoshere[J].Infrared and Laser Engineering,2006,35(2):130-134.)
[4]杨鹏翎,冯国斌,王振宝,等.测量中红外激光远场光斑的光电阵列靶斑仪[J].中国激光,2010,37(2):521-525.(YANG Peng-ling,FENG Guo-bin,WANG Zhen-bao,et al.Detector array for measuring far-field power density distribution of mid-infrared laser[J].Chinese Journal of Laser,2010,37(2):521-525.)
[5]杨鹏翎,冯国斌,王振宝,等.中红外激光光斑探测阵列[J].中国激光,2011,38(7):0702008.(YANG Peng-ling,FENGGuo-bin,WANG Zhen-bao,et al.Mid-infrared high energy laser beam detector array[J].Chinese Journal of Laser,2011,38(7):0702008.)
[6]刘晶儒,杜太焦,王立君.高能激光系统试验与评估[M].北京:国防工业出版社,2014.(LIU Jing-ru,DU Tai-jiao,WANG Li-jun.High Energy Laser System Test and Evaluation[M].Beijing:National Defense Industry Press,2014.)
[7]MARTIN J.Simulation of wave propagation in random media:Theory and application[J].Proc of SPIE,1992,6 652:192-197.
[8]徐光勇,吴健,杨春平,等.高斯光束在大气湍流中的数值模拟和光强起伏[J].激光技术,2008,32(5):548-550.(XUGuang-yong,WU Jian,YANG Chun-ping,et al.Simulation and optical research of Gaussian beam in atmosphere turbulence[J].Laser Technology,2008,32(5):548-550.)
[9]郭惠超,孙华燕,吴健华.大气湍流效应对激光传输影响的仿真研究[J].装备学院学报,2014,25(1):116-119.(GUOHui-chao,SUN Hua-yan,WU Jian-hua.Simulation of atmospheric turbulence effects on laser propagation impact[J].Journal of Equipment Academy,2014,25(1):116-119.)
[10]杜太焦,陈志华,闫伟,等.激光武器靶面强度参数评估方法[J].激光与红外,2010,40(2):129-131.(DU Tai-jiao,CHEN Zhi-hua,YAN Wei,et al.Method for laser weapon target intensity parameter assessment[J].Laser&Infrared,2010,40(2):129-131.)
[11]庞淼.激光束远场参数高精度测量技术研究[D].成都:电子科技大学,2015.(PANG Miao.Research on the high-precision measuring technology for the laser beam's far-field parameters[D].Chengdu:University of Electronic Science and Technology of China,2015.)
[2]苏毅,万敏.高能激光系统[M].北京:国防工业出版社,2004.(SU Yi,WAN Min.High Energy Laser System[M].Beijing:National Defense Industry Press,2004.)
[3]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.(RAO Rui-zhong.Combined effect of turbulence and thermal blooming of laser propagation in atmoshere[J].Infrared and Laser Engineering,2006,35(2):130-134.)
[4]杨鹏翎,冯国斌,王振宝,等.测量中红外激光远场光斑的光电阵列靶斑仪[J].中国激光,2010,37(2):521-525.(YANG Peng-ling,FENG Guo-bin,WANG Zhen-bao,et al.Detector array for measuring far-field power density distribution of mid-infrared laser[J].Chinese Journal of Laser,2010,37(2):521-525.)
[5]杨鹏翎,冯国斌,王振宝,等.中红外激光光斑探测阵列[J].中国激光,2011,38(7):0702008.(YANG Peng-ling,FENGGuo-bin,WANG Zhen-bao,et al.Mid-infrared high energy laser beam detector array[J].Chinese Journal of Laser,2011,38(7):0702008.)
[6]刘晶儒,杜太焦,王立君.高能激光系统试验与评估[M].北京:国防工业出版社,2014.(LIU Jing-ru,DU Tai-jiao,WANG Li-jun.High Energy Laser System Test and Evaluation[M].Beijing:National Defense Industry Press,2014.)
[7]MARTIN J.Simulation of wave propagation in random media:Theory and application[J].Proc of SPIE,1992,6 652:192-197.
[8]徐光勇,吴健,杨春平,等.高斯光束在大气湍流中的数值模拟和光强起伏[J].激光技术,2008,32(5):548-550.(XUGuang-yong,WU Jian,YANG Chun-ping,et al.Simulation and optical research of Gaussian beam in atmosphere turbulence[J].Laser Technology,2008,32(5):548-550.)
[9]郭惠超,孙华燕,吴健华.大气湍流效应对激光传输影响的仿真研究[J].装备学院学报,2014,25(1):116-119.(GUOHui-chao,SUN Hua-yan,WU Jian-hua.Simulation of atmospheric turbulence effects on laser propagation impact[J].Journal of Equipment Academy,2014,25(1):116-119.)
[10]杜太焦,陈志华,闫伟,等.激光武器靶面强度参数评估方法[J].激光与红外,2010,40(2):129-131.(DU Tai-jiao,CHEN Zhi-hua,YAN Wei,et al.Method for laser weapon target intensity parameter assessment[J].Laser&Infrared,2010,40(2):129-131.)
[11]庞淼.激光束远场参数高精度测量技术研究[D].成都:电子科技大学,2015.(PANG Miao.Research on the high-precision measuring technology for the laser beam's far-field parameters[D].Chengdu:University of Electronic Science and Technology of China,2015.)