基于不同伪随机码调制的光纤激光测距系统  

Fiber Laser Ranging System Based on Different Pseudorandom Code Modulation

作　　者：杨芳[1,2,3] 张鑫[1,3] 贺岩[1] 陈卫标[1] 

机构地区：[1]中国科学院上海光学精密机械研究所空间激光信息传输与探测技术重点实验室,上海201800 [2]上海电力学院电子与信息工程学院,上海200090 [3]中国科学院大学,北京100049

出　　处：《中国激光》2014年第6期270-275,共6页Chinese Journal of Lasers

基　　金：中国科学院支撑技术项目(61501010304)

摘　　要：在高速伪随机码调制和光子计数技术的激光测距系统中,采用不同的伪随机码,在光纤延时的方法下开展了基于不同伪随机码调制的测距实验并与M序列伪随机码进行对比。结果表明在相同的入射条件下,M序列伪随机码具有更好的信噪比和测距精度。搭建了实际测距平台并开展了室外测距实验,在10阶M序列伪随机码,1GHz调制速率,发射光输出峰值功率12.1W,测量768.5m远的目标时,得到3.2cm的测距精度。Different pseudorandom codes are adapted in laser ranging system based on high modulation rate and photon counting technology. Ranging performance is compared and demonstrated between different pseudorandom codes and M sequence using fiber delay method of ranging experiments. Under the same incident condition, better signal of noise ratio and ranging accuracy are acquired when using M sequence. The actual ranging platform is established and ranging experiment outdoor is carried out. Ranging accuracy of 3.2 cm is obtained when the laser transmit to a target which distance is about 768.5 m under the condition of the transmitter peak power of 12. 1 W, 10 order M pseudorandom sequence and 1 GHz modulation rate.

关 键 词：激光技术 激光测距 伪随机码调制 光子计数 InGaAs/InP单光子探测器 

分 类 号：TN958.98[电子电信—信号与信息处理]