• 文献标题:   A multi-frequency fiber optic acoustic sensor based on graphene-oxide Fabry-Perot microcavity
  • 文献类型:   Article
  • 作  者:   WANG JX, ZHAO JJ, WANG JY, WAN HD, ZHANG ZX
  • 作者关键词:   fiber optic acoustic sensor, graphene oxide, fabryperot microcavity, interference spectrum, multifrequency
  • 出版物名称:   OPTICAL FIBER TECHNOLOGY
  • ISSN:   1068-5200 EI 1095-9912
  • 通讯作者地址:  
  • 被引频次:   6
  • DOI:   10.1016/j.yofte.2021.102607
  • 出版年:   2021

▎ 摘  要

A multi-frequency fiber optic acoustic sensor (FOAS) based on graphene-oxide Fabry-Perot microcavity (GO FPM) is proposed and demonstrated. The micrometer-size FP cavity is formed by a single-mode-fiber end surface and a layer of GO diaphragm. The GO diaphragm is used as the acoustic sensitive diaphragm to realize the acoustic signal detection. The performance of the GO-FPM FOAS for single-frequency, dual-frequency and triple frequency acoustic signal detection is experimentally investigated. The influence of the input optical power and wavelength on sensor performance is also investigated. As for single-frequency acoustic signal detection, the signal to noise ratio (SNR) can be as high as 65.2 dB, with a broad frequency response ranged from 400 Hz to 20 kHz and a high linearity of approximate to 1. The SNRs for the dual-frequency and the triple-frequency acoustic signal detection can be >65.1 dB and >61.8 dB, respectively. The proposed GO-FPM FOAS have potential applications in structural health monitoring, fiber hydrophone, pipeline leakage detection, biomedicine, etc.