CO_2脉冲外差激光成像光学系统中高斯光束光路的设计  

Design of the Local Beam Branch in CO_2 Laser Imaging Radar Optical System

作　　者：刘丽萍[1] 王骐[1] 

机构地区：[1]哈尔滨工业大学可调谐激光技术国家级重点实验室,黑龙江哈尔滨150001

出　　处：《中国激光》2003年第7期605-608,共4页Chinese Journal of Lasers

摘　　要：为提高CO_2脉冲外差激光成像光学系统的外差探测效率,在出射光为基模高斯光束的本振光路的设计中。根据光束经过光学系统的变换与传输特性,采用离焦式扩束望远系统,调节本振高斯光的束腰位置,使之与置于成像物镜焦平面的探测器的光敏面重合,实现高斯光束的本振光与从目标反射的平面波信号光位相的最佳匹配。For improving the heterodyne efficiency in CO2 laser imaging radar system, a focus-off telescope is applied as beam broadening system to adjust the position of the local beam waist in local beam branch of the CO2 laser imaging radar optical system. By adjusting the local beam waist to the focal plane of the imaging objective lens the best phase matching situation is accomplished between the local beam and the signal beam reflected from the target.

关 键 词：雷达工程 激光成像光学系统 外差效率 高斯光束 位相匹配 

分 类 号：TN958.98[电子电信—信号与信息处理]