基于双端MZ结构的干涉型光纤地震检波器设计  

Design of interferometric optical fiber geophone based on double-ended MZ structure

作　　者：林家锴 衣文索[1] 陈刚[1] 巩楠楠 高新雨 LIN Jiakai;YI Wensuo;CHEN Gang;GONG Nannan;GAO Xinyu(College of Electronic Information Engineering,Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]长春理工大学光电工程学院,长春130022

出　　处：《光通信技术》2021年第8期39-41,共3页Optical Communication Technology

基　　金：国家自然科学基金(61675035)资助。

摘　　要：为了解决传统地震仪抗电磁干扰能力弱、频率响应范围窄以及机电反馈结构体积大、成本高等问题,设计了一种双端马赫-曾德尔(MZ)结构的干涉型光纤地震检波器。利用液体硅胶将黄铜质量块与硅胶弹性体浇注形成一体推挽式结构,采用ANSYS软件对结构体进行参数化建模与集总参数有限元分析,确定结构体的固有频率和共振发生时的最大合成振幅,并由示波器采集不同频段的信号进行灵敏度测试实验。实验结果表明:该检波器在共振发生时的固有频率为106.77 Hz,与实验所测数值的相对误差为1.65%,验证了干涉型光纤地震检波器的优越潜能。In order to solve the problems of traditional seismographs'weak anti-electromagnetic interference ability,narrow frequency response range,large volume and high cost of electromechanical feedback structure,a double-ended Mach-Zehnder(MZ)structure interferometric optical fiber geophone is designed.Use liquid silicone to combine the brass mass with the silicone elastomer to form a one-piece push pull structure,adopt ANSYS software to carry out parametric modeling and lumped parameter finite element analysis of the structure,so as to determine the natural frequency of the structure and when resonance occurs maximum composite amplitude.The signals of different frequency bands are collected by oscilloscope for sensitivity test.The experimental results show that the natural frequency of the geophone when resonance occurs is 106.77 Hz,and the relative error with the experimental value is 1.65%,which verifies the superior potential of the interferometric optical fiber geophone.

关 键 词：地震检波器 干涉型光纤 推挽式结构 有限元分析 

分 类 号：TN247[电子电信—物理电子学]