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为了研制用于多波长卫星激光测距的激光系统,中国科学院上海天文台与捷克技术大学的联合研究组,在Prague实验室用Nd:YAG主被动锁模激光器产生的倍频0.53μm(脉冲能量35mJ,脉宽35ps)绿光抽运特制的1m长Raman盒中的高压H2,研究一阶频移光的转换效率与光束的空间特性.得到了一阶Stokes光(0.68μm):7mJ(单脉冲),光束发散角40″,空间抖动角小于4″.一阶反Stokes光(0.43μm):2mJ(单脉冲),光束发散角56″,空间抖动角小于4″.出射光中还有0.53μm的绿光:10mJ(单脉冲),光束发散角40″,空间抖动角小于7″.还用激光测距方程分别估算了用Raman产生的多波长激光的回波探测概率,结果表明所研制的该激光系统可以进行卫星实测.该Raman激光系统将装备于中国科学院上海天文台的卫星激光测距站进行多波长卫星测距研究.
In order to develop a laser system for multiwavelength satellite laser ranging, a joint research team of the Shanghai Astronomical Observatory and the Czech Technical University, CAS, at a laboratory in Prague using a Nd: YAG active-passive mode-locked laser with a doubling frequency of 0.53 μm (pulse energy of 35 mJ , Pulse width 35ps) Green pumping high pressure H2 in a special 1m long Raman box to study the first-order frequency shift of the light conversion efficiency and the spatial characteristics of the beam obtained first Stokes light (0.68μm): 7mJ (single pulse ), The beam divergence angle 40 “, the spatial jitter angle is less than 4.” The first-order anti-Stokes light (0.43μm): 2mJ (single pulse), the beam divergence angle 56 “, space jitter angle less than 4” μm green light: 10mJ (single pulse), beam divergence angle 40 "and space jitter angle less than 7. The echo detection probabilities of multi-wavelength laser produced by Raman were also estimated by laser ranging equation respectively. Of the laser system for satellite measurements.The Raman laser system will be equipped with the Chinese Academy of Sciences Shanghai Observatory satellite laser ranging station for multi-wavelength satellite ranging research.