Open AccessSuppression of parasitic interference in a fiber-tip Fabry-Perot interferometer for high-pressure measurements
Author(s) -
Jinshan Xu,
Jun He,
Wei Huang,
Xizhen Xu,
Kuikui Guo,
Zhe Zhang,
Yiping Wang
Publication year - 2018
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.26.028178
Subject(s) - materials science , optics , fabry–pérot interferometer , polishing , interferometry , diaphragm (acoustics) , pressure sensor , optical fiber , interference (communication) , reflection (computer programming) , fiber optic sensor , pressure measurement , fiber , fabrication , optoelectronics , vibration , wavelength , acoustics , composite material , channel (broadcasting) , computer science , thermodynamics , programming language , physics , alternative medicine , pathology , engineering , mechanical engineering , medicine , electrical engineering
We demonstrate a novel design and fabrication process for fiber-tip Fabry-Perot interferometric (FTFPI) pressure sensors which eliminates fringe envelopes in the reflection spectrum. The outer facet reflectivity and thickness of the FTFPI silica diaphragm were reduced through orthogonal rough-polishing of the fiber end facet. A silica FTFPI sample with a diaphragm thickness of ~10.7 μm was produced and tested under hydraulic pressures ranging from 0 to 30 MPa. The proposed sensor achieved a pressure sensitivity of -284 pm/MPa at 1555 nm and could be a valuable new tool for high pressure measurements.
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