基于法布里-珀罗干涉仪的高灵敏度光纤传声器  

A High Sensitivity Fiber-Optic Microphone Based on Fabry-Perot Interferometer

作　　者：赵龙江[1] 冯杰[1] 程进[1] 冯晖[1] 邹小平[2] 

机构地区：[1]中国电子科技集团公司第三研究所,北京100015 [2]北京信息科技大学传感技术研究中心,北京100101

出　　处：《北京理工大学学报》2014年第12期1294-1298,共5页Transactions of Beijing Institute of Technology

摘　　要：论文系统完整地描述了基于法布里-珀罗干涉仪的高灵敏度光纤传声器的研究,内容包括法布里-珀罗干涉仪、光强度解调和电压输出.根据基本原理分析和计算,通过对结构紧凑传感头、放大的自发辐射(ASE)宽带光源与密波分复用器(DWDM)选配组合的相干光源以及跨阻和前置放大电路的设计,制作完成了光纤传声器.该光纤传声器具有高灵敏度值为247mV/Pa,在频率范围30Hz^4kHz内的平坦度小于2dB,以及高信噪比和低总谐波失真.A high sensitivity fiber-optic microphone based on Fabry-Perot interferometer was studied systemically and comprehensively,including Fabry-Perot interferometer,light intensity demodulation and voltage output.According to the analysis and calculation of basic principles,a fiber-optic microphone was realized and manufactured with a sensor cell of compact structure,a coherent light source of optional assembly by amplified spontaneous emission（ASE）broadband light source and dense wavelength division multiplexing（DWDM）,and electric circuits of transimpedance amplifier and pre-amplifier.The performance of the fiber-optic microphone was characterized.The results show the high sensitivity of 247mV/Pa,frequency range of 30Hz-4kHz with conformity less than 2dB,and high SNR and low total harmonic distortion.

关 键 词：法布里-珀罗干涉仪 光强解调 DWDM 光纤传声器 高灵敏度 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]