一种基于双膜结构的宽频光学麦克风  

Wideband optical microphone based on dual-diaphragm structure

作　　者：李群 陆云才 邵剑 吴鹏 梁家碧 李晓涵 但德春 蔚超 LI Qun;LU Yuncai;SHAO Jian;WU Peng;LIANG Jiabi;LI Xiaohan;DAN Dechun;WEI Chao(Electric Power Research Institute,State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 211103,China;School of Communication and Information Engineering,Shanghai University,Shanghai 200444,China;State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 210024,China)

机构地区：[1]国网江苏省电力有限公司电力科学研究院,南京211103 [2]上海大学通信与信息工程学院,上海200444 [3]国网江苏省电力有限公司,南京210024

出　　处：《光通信技术》2024年第5期73-79,共7页Optical Communication Technology

基　　金：国网江苏省电力有限公司科技项目(J2023092)资助。

摘　　要：由于传统基于膜片或悬臂梁式的光学麦克风频响范围较窄,且在不同环境和需求下检测的声波频率范围不同,设计了一种基于双膜结构的宽频光学麦克风。该光学麦克风由单模光纤、超材料膜片和波导膜片组成。理论分析了2个膜片的结构参数对传感器性能的影响,利用COMSOL Multiphysics进行了仿真,并对制备出的光学麦克风进行了测试。仿真结果表明:所设计的光学麦克风在1~100 kHz频率内具有平坦的频率响应,其谐振频率为170 kHz。Due to the narrow frequency response range of traditional optical microphones based on diaphragm or cantilever beam,and the different frequency ranges of sound waves detected in different environments and requirements,a wideband optical microphone based on a dual diaphragm structure has been designed.This optical microphone is composed of single-mode fiber,metamaterial membrane,and waveguide membrane.Theoretical analysis is conducted on the influence of the structural parameters of two membranes on the performance of the sensor.COMSOL Multiphysics is used for simulation,and the prepared optical microphone is tested.The simulation results show that the designed optical microphone has a flat frequency response within the frequency range of 1~100 kHz,with a resonant frequency of 170 kHz.

关 键 词：光学麦克风 宽频响 超材料膜片 波导膜片 双膜结构 

分 类 号：TN256[电子电信—物理电子学]