Numerical simulation of steady-state thermal blooming about high power laser
-
摘要: 为了研究强激光在大气传输过程中产生的热晕效应,采用数值模拟的方法,对无风时稳态热晕效应的影响参数进行了求解,探讨了无风稳态热晕效应对轴上光强以及远场能量分布的影响。结果表明,无风稳态热晕效应存在时,随发射功率的增大,一定传输距离截面上的峰值功率密度先增大后减小;截面上的峰值光强随基模高斯光束的腰斑半径的增大而增大;随着传输距离的增大,截面上峰值光强在逐渐减小,能量在逐渐向周围扩展;在一定条件下,截面上的光强分布会呈现中心光强小于周围光强的“草帽型”分布。该结论对研究强激光在远场的辐照效应是有帮助的。Abstract: When high power laser transmits in the atmosphere,thermal blooming will be generated.In order to study the phenomenon,the effect parameters to steady-state thermal blooming without wind are solved in detail by numerical simulation.It is studied that both epaxial light intensity and energy distribution at far field are affected by steady-state thermal blooming without wind.The study results indicate that as emission power increases,the peak power density on the section of a certain distance will increase firstly,then it will descend and that the peak light intensity on the section will increase with the increasing of spot radius of basic mode Gaussian beam.As the propagation distance increases,the peak light intensity on the section will descend gradually,and the laser energy will spread.The light intensity distribution exhibits straw hat shape on a certain conditions,in other word to say,the central light intensity is less than acroteric light intensity.The results is helpful to the research of high power laser's irradiation effect at far field.
-
-
[1] SU Y,WANG M.High energy laser system[M].Beijing:National Defence Industry Press,2004.143～144(in Chinese).
[2] GEBHARDT F G.Twenty-five years of thermal blooming:an overview[J].SPIE,1990,1221:2～25.
[3] WANG M,SU Y.Computation and analysis on focus shift of laser caused by atmospheric thermal blooming[J].Calculation Physics,2002,19(5):449～452(in Chinese).
[4] ZHENG Zh,LIU Y X,LÜ B D.Propagation properties of Hermite-Laguerre-Gaussian beam[J].Laser Technology,2005,29(6):641～644(in Chinese).
[5] QIANG X W.Analytical investigation on nonlinear thermal distortion effect of laser beams propagation in the atmosphere[J].Infrared and and Laser Engineering,2000,29(6):6～10(in Chinese).
[6] LIU J,LIU Sh F,JIN G.Thermal effects on laser propagating in a closed tube with air[J].Journal of Optoelectronics · Laser,2004,15(1):100～103(in Chinese).
[7] LI Zh G,WANG Sh B,GUO D H et al.Experimental study of guiding and triggering of air discharges by laser-induced plasma[J].Laser Technology,1999,23(6):332～334(in Chinese).
[8] TAO X Y,JI X L,LÜ B D.Numerical simulation of the thermal effect in a beam control system[J].Laser Technology,2003,27(6):514～516,596(in Chinese).
[9] GE Z M,LÜ Zh W,LIN D Y.The research and development of the stimulated Brillouin scattering in the optical component[J].Laser Technology,2002,26(5):375～378(in Chinese).
[10] LÜ B D.Propagation and control of high-power lasers[M].Beijing:National Defence Industry Press,1999.254～259(in Chinese).
-
期刊类型引用(4)
1. 吴俊杰. 基于非单调共轭梯度算法的声纹识别机器人控制系统设计. 计算机测量与控制. 2020(01): 116-119+146 . 
百度学术
2. 刘雪燕，袁宝玲. 噪声背景下的舰船指挥语音识别算法. 舰船科学技术. 2020(24): 76-78 . 百度学术
3. 刘雅楠，赵添羽，李靖宇，唐丽，张春辉，邹鹤，黄程程. 基于激光技术的乳腺超声图像肿瘤良恶性判别. 激光杂志. 2019(07): 65-69 . 百度学术
4. 蔡栋. 基于激光遥感的地理信息系统设计. 激光杂志. 2018(11): 183-186 . 百度学术
其他类型引用(1)
计量
- 文章访问数: 0
- HTML全文浏览量: 0
- PDF下载量: 7
- 被引次数: 5
下载: