Digital phase demodulation for low-coherence interferometry-based fiber-optic sensors

Liu, Y.; Strum, R.; Stiles, D.; Long, C.; Rakhman, A.; Blokland, W.; Winder, D.; Riemer, B.; Wendel, M.

doi:10.1016/j.optcom.2017.11.002

Digital phase demodulation for low-coherence interferometry-based fiber-optic sensors

Journal Article · Sun Nov 19 23:00:00 EST 2017 · Optics Communications

DOI:https://doi.org/10.1016/j.optcom.2017.11.002· OSTI ID:1424460

Liu, Y. ^[1]; Strum, R. ^[1]; Stiles, D. ^[1]; Long, C. ^[1]; Rakhman, A. ^[2]; Blokland, W. ^[1]; Winder, D. ^[1]; Riemer, B. ^[1]; Wendel, M. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy

In this paper, we describe a digital phase demodulation scheme for low-coherence interferometry-based fiber-optic sensors by employing a simple generation of phase-shifted signals at the interrogation interferometer. The scheme allows a real-time calibration process and offers capability of measuring large variations (up to the coherence of the light source) at the bandwidth that is only limited by the data acquisition system. Finally, the proposed phase demodulation method is analytically derived and its validity and performance are experimentally verified using fiber-optic Fabry–Perot sensors for measurement of strains and vibrations.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1424460

Alternate ID(s):: OSTI ID: 1549160

Journal Information:: Optics Communications, Journal Name: Optics Communications Vol. 411; ISSN 0030-4018

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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All-Fiber Phase-Shifted Demodulation System for Fabry-Perot Interferometric Sensors Liu, Yun; Qi, Bing; Winder, Drew E. CLEO: Science and Innovations, Conference on Lasers and Electro-Optics https://doi.org/10.1364/cleo_si.2019.sth4g.5	conference	January 2019

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