摘要
针对基于相位解调的双光束薄膜干涉型光纤传声器的特性展开了研究,仿真分析了三路信号的直流分项、交流分项以及相位差对双光束薄膜干涉型光纤传声器输出性能的影响。采用对比法,并通过实验研究了基于相位解调的双光束薄膜干涉型光纤传声器的输出特性,实现了灵敏度为193 mV/Pa@1 kHz、频率响应为200 Hz～4 kHz@±3 dB的声信号测量。本研究能够很好地应用于声探测、语音识别等领域。
The performances of a double-beam thin-film interferometric fiber(DBTFIF) microphone based on phase demodulation is studied. The effects of the direct current(DC) subentry, alternating current(AC) subentry and phase difference of three interference signals on the output performances of this DBTFIF microphone are analyzed by simulation. Through the comparison method, the output performances of this DBTFIF microphone based on phase demodulation are studied experimentally as well. The experimental results show that the measurement of acoustic signals with a sensitivity of about 193 mV/Pa at 1 kHz and the frequency response ranging from 200 Hz to 4 kHz with a fluctuation of about 士 3 dB can both be achieved. This research can be well used in the fields of acoustic detection, voice recognition, and so on.
作者
周瑜
刘超
王坤博
魏晓村
Zhou Yu;Liu Chao;Wang Kunbo;Wei Xiaocun(The Third Research Institute of China Electronics Technology Group Corporation,Beijing 100015,China;College of Underwater Acoustic Engineering,Harbin En gineering University,Harbin,Heilongjiang lb000\,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2019年第1期308-314,共7页
Acta Optica Sinica
基金
中国电科联合基金
关键词
光通信
光纤传感器
声传感
双光束薄膜干涉
相位解调
optical communication
fiber sensor
acoustic sensing
double-beam thin-film interference
phase demodulation
