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Title: Quadrature phase-shifted optical demodulator for low-coherence fiber-optic Fabry-Perot interferometric sensors

Abstract

We demonstrate a quadrature phase-shifted optical demodulation scheme for low-coherence fiber-optic Fabry-Perot interferometric sensors. The main part of the demodulator is a fiber-optic Mach-Zehnder interferometer (MZI) constructed with a 1×2 fiber coupler, a 3×3 fiber coupler, and fiber delay lines. This configuration allows us to generate quadrature phase-shifted interference signals simultaneously, thus eliminating the problem of ambiguous phase discrimination. The path length difference of the MZI is adjustable to adapt to sensors with arbitrary gaps. A great phase stability of the MZI has been obtained by using identical optical components in its two optical paths. The demodulator has been applied to a fiber-optic vibrometer. Measurement of vibrations with amplitudes from 0.67 nm to 12.3 µm has been demonstrated.

Authors:
 [1];  [2];  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division
OSTI Identifier:
1496912
Alternate Identifier(s):
OSTI ID: 1497726; OSTI ID: 1502560
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Published Article
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 27; Journal Issue: 5; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 47 OTHER INSTRUMENTATION; fiber-optic sensor, interferometer; quadrature phase shift

Citation Formats

Qi, Bing, Winder, Drew E., and Liu, Yun. Quadrature phase-shifted optical demodulator for low-coherence fiber-optic Fabry-Perot interferometric sensors. United States: N. p., 2019. Web. doi:10.1364/OE.27.007319.
Qi, Bing, Winder, Drew E., & Liu, Yun. Quadrature phase-shifted optical demodulator for low-coherence fiber-optic Fabry-Perot interferometric sensors. United States. doi:10.1364/OE.27.007319.
Qi, Bing, Winder, Drew E., and Liu, Yun. Wed . "Quadrature phase-shifted optical demodulator for low-coherence fiber-optic Fabry-Perot interferometric sensors". United States. doi:10.1364/OE.27.007319.
@article{osti_1496912,
title = {Quadrature phase-shifted optical demodulator for low-coherence fiber-optic Fabry-Perot interferometric sensors},
author = {Qi, Bing and Winder, Drew E. and Liu, Yun},
abstractNote = {We demonstrate a quadrature phase-shifted optical demodulation scheme for low-coherence fiber-optic Fabry-Perot interferometric sensors. The main part of the demodulator is a fiber-optic Mach-Zehnder interferometer (MZI) constructed with a 1×2 fiber coupler, a 3×3 fiber coupler, and fiber delay lines. This configuration allows us to generate quadrature phase-shifted interference signals simultaneously, thus eliminating the problem of ambiguous phase discrimination. The path length difference of the MZI is adjustable to adapt to sensors with arbitrary gaps. A great phase stability of the MZI has been obtained by using identical optical components in its two optical paths. The demodulator has been applied to a fiber-optic vibrometer. Measurement of vibrations with amplitudes from 0.67 nm to 12.3 µm has been demonstrated.},
doi = {10.1364/OE.27.007319},
journal = {Optics Express},
number = 5,
volume = 27,
place = {United States},
year = {2019},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1364/OE.27.007319

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