一种基于宽频光源和FP腔滤波的CO2检测系统  

A CO2 Detection System Based on Broadband Light Source and FP Cavity Filtering

作　　者：成龙[1,2,3] 丁雷[1,2] 张子儒 CHENG Long;DING Lei;ZHANG Ziru(Key Laboratory of Infrared Detection and Imaging Technology of the Chinese Academy of Sciences,Shanghai 200083,CHN;Shanghai Institute of Technical Physics of the Chinese Academy of Sciences,Shanghai 200083,CHN;University of Chinese Academy of Sciences,Beijing 100049,CHN)

机构地区：[1]中国科学院红外探测与成像技术重点实验室,上海200083 [2]中国科学院上海技术物理研究所,上海200083 [3]中国科学院大学,北京100049

出　　处：《半导体光电》2020年第2期268-272,共5页Semiconductor Optoelectronics

摘　　要：介绍了一种基于宽频光源和法布里-珀罗谐振腔(Fabry-Perot,FP)结构的CO2检测系统。该系统为主动光学系统,结构简单、系统信噪比高。从差分吸收激光雷达原理出发,阐述了该系统的基本工作原理,使用HITRAN数据库模拟大气环境,设计系统参数,确定系统工作波段为1.57μm,光源为L波段超辐射LED光源(Super LED,SLED),能量波动值Rip为50dB,输出功率为24.51mW,接收端滤波器为光纤FP腔滤波器,工作中心波长为1.55μm,带宽为60nm,通道间隔为50GHz,设计系统探测误差为2×10-6。A system based on wide-band light source and Fabry-Perot(FP)structure is introduced for the detection of CO2.The system is an active optical system with simple structure and high signal noise ratio(SNR).Based on the principles of traditional differential absorption lidar,the basic working principles of the detection system are described,and the system parameters are designed by using the HITRAN database to simulate the atmospheric environment.Thus the working band of the system is determined to be 1.57μm,the light source is a L-band super-luminescent LED(SLED),and the energy fluctuation value Rip is 50 dB.The system output power is 24.51 mW,and the filter at the receiving end is a fiber-optic FP cavity filter with the center wavelength of 1.55μm,the bandwidth of 60 nm,and the channel interval of 50 GHz.The error of the designed system is only 2×10-6.

关 键 词：CO2柱浓度 光纤FP腔 宽频光源 SLED 主动光学 

分 类 号：TN958.98[电子电信—信号与信息处理]