Open AccessAn optical fiber Fabry-Perot interferometric sensor based on functionalized diaphragm for ultrasound detection and imaging
Author(s) -
Wenlu Zhang,
Ruohui Wang,
Qiangzhou Rong,
Xueguang Qiao,
Tuan Guo,
Zhihua Shao,
Jiacheng Li,
Wenwen Ma
Publication year - 2017
Publication title -
ieee photonics journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 73
eISSN - 1943-0655
pISSN - 1943-0647
DOI - 10.1109/jphot.2017.2694480
Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics
A miniature optical fiber ultrasonic sensor based on the Fabry-Perot interferometer (FPI) is proposed and experimentally demonstrated. The cavity of the interferometer is based on a section of hollow core fiber coated with a 353ND diaphragm. A well-define interference pattern is achieved, and the spectral sideband filter technique is used to interrogate the sensor. Because the thin reflective diaphragm is extremely sensitive to sound pressure, the signal-to-noise ratio of the sensor response reaches to 31.22 dB with the pulse ultrasonic excitation of 300 kHz. A clear interface information can be distinguished in physical model imaging, and the longitudinal spatial resolution is 5 mm. This proposed sensor has the advantages of being simple to fabricate, ultracompact in size, cost effective, corrosion resistance, and being highly stable.