1.55μm相干激光测风雷达平衡式探测接收实验  

Investigation of Balanced Detection and Receiver for 1.55 μm Coherent Wind Lidar

作　　者：高龙[1] 王春晖[1] 李彦超[1] 丛海芳[1] 

机构地区：[1]哈尔滨工业大学光电子技术研究所可调谐激光技术国家级重点实验室,哈尔滨150001

出　　处：《光子学报》2010年第6期1064-1069,共6页Acta Photonica Sinica

基　　金：国家自然科学基金(60577032)资助

摘　　要：研究了用于相干激光测风雷达信号接收的平衡式探测接收技术.推导出了平衡式相干探测过程的数学模型和信噪比表达式,并通过仿真软件对该模型进行了模拟仿真.在同等输入条件下,当平衡式相干探测系统的最佳分束比范围在[0.293,0.707]时,其信噪比比普通相干探测的信噪比高.此外,平衡式探测接收还具有判断风向的功能,最后通过实验验证了仿真结果.Balanced receiver techniquc for signal detection in coherent lidar is analyzed. Mathematical modeling and signal to noise ratio of the balanced detection process is deduced. A numerical simulated system is established. For the same input signal, when the beam splitter coefficient of balanced coherent detection is between 0. 293 and 0. 707.the signal to noise ratio of balanced coherent detection is higher than that of single detector coherent detection. And also direction of the wind can be obtained using the balanced detection technique.and experiment results arc consisted well with simulation results.

关 键 词：激光雷达 外差探测 平衡式接收 多普勒频移 光束分束比 

分 类 号：TN248[电子电信—物理电子学]