Open AccessOptoelectronic hybrid fiber laser sensor for simultaneous acoustic and magnetic measurement
Author(s) -
Zhaogang Wang,
Wentao Zhang,
Wenzhu Huang,
Shengwen Feng,
Fang Li
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.024383
Subject(s) - magnetic field , sensitivity (control systems) , materials science , optics , sound pressure , optical fiber , acoustics , laser , signal (programming language) , distributed acoustic sensing , fiber optic sensor , acoustic wave , lorentz force , optoelectronics , physics , electronic engineering , quantum mechanics , computer science , engineering , programming language
An optoelectronic hybrid fiber optic acoustic and magnetic sensor (FOAMS) based on fiber laser sensing is proposed, which can measure acoustic and magnetic field simultaneously. A static magnetic field signal can be carried by an AC Lorentz force, and demodulated in frequency domain together with acoustic signals. Some experiments of acoustic pressure sensitivity, magnetic field sensitivity, and simultaneous acoustic and magnetic measurement on a fabricated FOAMS were carried out. The acoustic pressure sensitivity was about -164.7 dB (0 dB re 1 pm/μPa) and the magnetic field sensitivity was 0.6 dB (0 dB re 1 pm/ (T•A)). The experiment of simultaneous acoustic and magnetic measurement shows that the detections of acoustic and magnetic field have little effect on each other in dynamic range and simultaneously measuring acoustic and magnetic field is feasible.