title: A Fiber-Optic Interferometric Tri-Component Geophone for Ocean Floor Seismic Monitoring.
abstract: For the implementation of an all fiber observation network for submarine seismic monitoring, a tri-component geophone based on Michelson interferometry is proposed and tested. A compliant cylinder-based sensor head is analyzed with finite element method and tested. The operation frequency ranges from 2 Hz to 150 Hz for acceleration detection, employing a phase generated carrier demodulation scheme, with a responsivity above 50 dB re rad/g for the whole frequency range. The transverse suppression ratio is about 30 dB. The system noise at low frequency originated mainly from the 1/f fluctuation, with an average system noise level -123.55 dB re rad / Hz ranging from 0 Hz to 500 Hz. The minimum detectable acceleration is about 2 ng / Hz , and the dynamic range is above 116 dB.
authors.affiliation: College of Instrumentation & Electrical Engineering, Jilin University, Changchun 130061, China. chenjd13@mails.jlu.edu.cn.
authors.forename: Jiandong
authors.initials: J
authors.lastname: Chen
authors.affiliation: College of Instrumentation & Electrical Engineering, Jilin University, Changchun 130061, China. tchang@jlu.edu.cn.|Institute of Automation, Shandong Academy of Sciences, Jinan 250014, China. tchang@jlu.edu.cn.
authors.forename: Tianying
authors.initials: T
authors.lastname: Chang
authors.affiliation: College of Instrumentation & Electrical Engineering, Jilin University, Changchun 130061, China. fuqj16@mails.jlu.edu.cn.
authors.forename: Qunjian
authors.initials: Q
authors.lastname: Fu
authors.affiliation: College of Instrumentation & Electrical Engineering, Jilin University, Changchun 130061, China. langjp14@mails.jlu.edu.cn.
authors.forename: Jinpeng
authors.initials: J
authors.lastname: Lang
authors.affiliation: College of Instrumentation & Electrical Engineering, Jilin University, Changchun 130061, China. gaowz15@mails.jlu.edu.cn.
authors.forename: Wenzhi
authors.initials: W
authors.lastname: Gao
authors.affiliation: Institute of Automation, Shandong Academy of Sciences, Jinan 250014, China. gezhb@sdas.org.
authors.forename: Zhongmin
authors.initials: Z
authors.lastname: Wang
authors.affiliation: College of Instrumentation & Electrical Engineering, Jilin University, Changchun 130061, China. miaoyu14@mails.jlu.edu.cn.
authors.forename: Miao
authors.initials: M
authors.lastname: Yu
authors.affiliation: Institute of Automation, Shandong Academy of Sciences, Jinan 250014, China. zhangyb@sdas.org.
authors.forename: Yanbo
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: College of Instrumentation & Electrical Engineering, Jilin University, Changchun 130061, China. hcui@jlu.edu.cn.
authors.forename: Hong-Liang
authors.initials: HL
authors.lastname: Cui
keywords: fiber optic Michelson interferometer; geophone; phase generated carrier; vibration sensor