Open AccessOptical fiber axial micro-displacement sensor based on Mach-Zehnder interferometer
Author(s) -
Changyu Shen,
Youqing Wang,
Jinlei Chu,
Yanfang Lu,
Li Yi,
Xinyong Dong
Publication year - 2014
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.031984
Subject(s) - mach–zehnder interferometer , interferometry , optics , optical fiber , materials science , offset (computer science) , fiber optic sensor , single mode optical fiber , core (optical fiber) , displacement (psychology) , physics , psychology , computer science , psychotherapist , programming language
A Mach-Zehnder interferometer (MZI) based fiber axial micro-displacement sensor was proposed. The MZI was constructed by a bowknot-type taper (BTT) combining with a fiber core-offset between two single mode fibers (SMFs). The axial micro-displacement of the core offset is correlated with the MZI transmission spectrum and varied with the interferometer arm length. For the arm length L of 12, 18, 24 and 30 mm, the proposed sensors showed high sensitivity of -0.362 dB/μm, -0.385 dB/μm, -0.332 dB/μm and -0.235dB/μm, and temperature errors of -0.056 dB/°C, -0.036 dB/°C, -0.044 dB/°C, -0.048 dB/°C, respectively. The theoretical simulations of the energy distributions were also given. The obtained sensitivity of -0.385 dB/μm is about 150 times high than that of the current similar existing axial micro-displacement sensor.