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20 June 2002 Digital demodulation algorithm for white-light fiber optic interferometric sensors
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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.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Serguei V. Miridonov, Mikhail G. Shlyagin, Anatolii V. Khomenko, and Vasilii V. Spirin "Digital demodulation algorithm for white-light fiber optic interferometric sensors", Proc. SPIE 4777, Interferometry XI: Techniques and Analysis, (20 June 2002);

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