Signal-processing algorithm for white-light optical fiber extrinsic Fabry–Perot interferometric sensors

Abstract

We present a novel signal-processing algorithm for single-mode optical fiber extrinsic Fabry–Perot interferometric sensors that can achieve both high-resolution, absolute measurement of the cavity length and a large dynamic measurement range simultaneously. The algorithm is based on an accurate model of the characteristics of a fiber-optic sensor that takes into account the phase shift that is due to the coupling of light reflected at the second surface to the lead-in fiber end.

© 2004 Optical Society of America

Fiber-optic extrinsic Fabry–Perot interferometer sensors with three-wavelength digital phase demodulation

Markus Schmidt and Norbert Fürstenau
Opt. Lett. 24(9) 599-601 (1999)

Optical scanning extrinsic Fabry–Perot interferometer for absolute microdisplacement measurement

Tianchu Li, Russell G. May, Anbo Wang, and Richard O. Claus
Appl. Opt. 36(34) 8858-8861 (1997)

Fiber-optic extrinsic Fabry–Perot dc magnetic field sensor

Ki D. Oh, Anbo Wang, and Richard O. Claus
Opt. Lett. 29(18) 2115-2117 (2004)

Frequency-estimation-based signal-processing algorithm for white-light optical fiber Fabry–Perot interferometers

Fabin Shen and Anbo Wang
Appl. Opt. 44(25) 5206-5214 (2005)

Exact analysis of low-finesse multimode fiber extrinsic Fabry-Perot interferometers

Ming Han and Anbo Wang
Appl. Opt. 43(24) 4659-4666 (2004)