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

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

doi:10.1016/j.optcom.2017.11.002

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

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

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

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. 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.

Original language	English
Pages (from-to)	27-32
Number of pages	6
Journal	Optics Communications
Volume	411
DOIs	https://doi.org/10.1016/j.optcom.2017.11.002
State	Published - Mar 15 2018
Externally published	Yes

Funding

We acknowledge J. Bryan, J. Diamond, S. Murray III, and R. Sangrey for their technical helps. ORNL is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy. This research was supported by the Office of Science, Basic Energy Science, Scientific User Facilities .

Funders	Funder number
Basic Energy Science
U.S. Department of Energy
Office of Science
Oak Ridge National Laboratory	DE-AC05-00OR22725

Keywords

Fabry-Perot
Instrumentation
Low-coherence interferometry
Metrology
Optical sensors
Phase-shifted detection

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10.1016/j.optcom.2017.11.002

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abstract = "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. 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.",

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AU - Strum, R.

AU - Stiles, D.

AU - Long, C.

AU - Rakhman, A.

AU - Blokland, W.

AU - Winder, D.

AU - Riemer, B.

AU - Wendel, M.

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AB - 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. 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.

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KW - Instrumentation

KW - Low-coherence interferometry

KW - Metrology

KW - Optical sensors

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

Abstract

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Keywords

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