中继镜系统上行传输的数值模拟  

Numerical simulation of uplink propagation for relay mirror system

作　　者：张京会[1] 范承玉[1] 马慧敏[1] 张鹏飞[1] 王海涛[1] 乔春红[1] 王英俭[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所大气成分与光学重点实验室,安徽合肥230031

出　　处：《红外与激光工程》2013年第2期428-432,共5页Infrared and Laser Engineering

基　　金：中国科学院合肥物质科学研究院青年人才基金(Y03RC21121);中国科学院合肥物质科学物质研究院计算中心课题

摘　　要：利用激光大气传输四维程序,在H-V5/7湍流模型下建立了双望远镜中继镜系统上行传输模型。数值研究了地面发射功率对中继平台接收望远镜与地面发射望远镜之间的耦合效率以及中继平台接收功率和接收光场远场峰值功率密度的影响。结果表明:在文中的条件下,中继平台接收功率随着地面发射功率的增大而增大,同时,中继接收望远镜与地面发射望远镜之间的耦合效率和中继平台接收光场的光束质量随着地面发射功率的增大而下降;存在一临界热畸变参数NDc,当上行传输的热畸变参数超过这一值时,中继平台接收光场的远场峰值功率密度不再增加反而下降。对不同湍流效应下的中继镜系统上行传输的临界热畸变参数作了进一步研究,得到了临界热畸变参数随D/r0值变化的拟合关系式NDc=22.36×e-0.26(D/r0)+36.87。Using the 4-D code for laser propagation in the atmosphere,uplink for the relay mirror system was simulated.Under H-V5/7 turbulence model,the relationship between launching power and power coupling efficiency between the receiver at the relay platform and the transmitting telescope on the ground,received power and peak power density of far-field at the relay platform was investigated.The result shows that the received power at the relay platform in creased with the increase of coupling efficiency and beam quality of the received laser.A critical distortion number N Dc,which when the distortion number exceeded the peak power of the far-field would descend,also existed.The critical value with different turbulence strength for uplink propagation of relay mirror system was further studied, and a fitting result was obtained and could be expressed as N Dc =22.36×e-0.26（D/r0） ＋36.87.

关 键 词：中继镜系统 上行传输 耦合效率 峰值功率密度 临界热畸变参数 

分 类 号：O43[机械工程—光学工程]