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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:
; ;
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). 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 Name: Optics Express 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.
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Qi, Bing, Winder, Drew E., & Liu, Yun. Quadrature phase-shifted optical demodulator for low-coherence fiber-optic Fabry-Perot interferometric sensors. United States. https://doi.org/10.1364/OE.27.007319
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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. https://doi.org/10.1364/OE.27.007319.
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@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 = {Wed Feb 27 00:00:00 EST 2019},
month = {Wed Feb 27 00:00:00 EST 2019}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1364/OE.27.007319
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Citation Metrics:
Cited by: 9 works
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Figures / Tables:

Figure 1 Figure 1: Schematic diagram of fiber-optic phase-shifted demodulator for a low-coherence fiber- optic EFPI-based sensor. SLD: superluminescent laser diode, FC: fiber coupler, VDL: variable delay line, PS: phase shifter, PC: polarization controller, PD: photodetector.
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