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Proceedings Paper

Digital demodulation algorithm for white-light fiber optic interferometric sensors
Author(s): Serguei V. Miridonov; Mikhail G. Shlyagin; Anatolii V. Khomenko; Vasilii V. Spirin
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Paper Abstract

New digital demodulation algorithm for white-light interferometric sensors with signal processing in spectral domain is presented. The algorithm uses phase calculation from an interferometric pattern in the acquired spectrum from the sensor to evaluate the optical path difference. Suggested demodulation method provides high accuracy with uncertainty close to theoretical limit imposed by system noise. For a fiber-optic sensor with birefringent fiber and a CCD spectrometer for signal acquisition, the algorithm demonstrated the random error of the optical path difference estimate about 0.18 nm.

Paper Details

Date Published: 20 June 2002
PDF: 7 pages
Proc. SPIE 4777, Interferometry XI: Techniques and Analysis, (20 June 2002); doi: 10.1117/12.472213
Show Author Affiliations
Serguei V. Miridonov, CICESE (Mexico)
Mikhail G. Shlyagin, CICESE (United States)
Anatolii V. Khomenko, CICESE (United States)
Vasilii V. Spirin, CICESE (Mexico) (United States)

Published in SPIE Proceedings Vol. 4777:
Interferometry XI: Techniques and Analysis
Katherine Creath; Joanna Schmit, Editor(s)

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