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Optical Engineering

Phase-generated carrier demodulation scheme for fiber Fabry-Pérot interferometric sensor with high finesse
Author(s): Wei Rao; Siliang Niu; Nan Zhang; Chunyan Cao; Yongmin Hu
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Paper Abstract

This paper presents a demodulation scheme using phase-generated carrier (PGC) for a fiber Fabry-Pérot interferometric (FFPI) sensor with high finesse. The FFPI is constructed by a polarization maintaining fiber ring resonator with dual-coupler (PMDC-FRR), which can eliminate the polarization induced fading phenomenon. Compared with the former phase demodulation methods, the PGC scheme in this paper does not assume a two-beam interferometric approximation for the Fabry-Pérot cavity, and can work at arbitrary value of finesse in theory. Two PMDC-FRRs with reflective coefficients of 0.5 and 0.9 are made in experiments for demodulation. Both the single-frequency and the wideband signals are successfully demodulated from the transmission intensities using the PGC demodulation scheme. The experimental results demonstrate that the PGC demodulation scheme is feasible for the FFPI sensor with high finesse. The effects of the reflective coefficient and the intensity loss to the finesse are also discussed.

Paper Details

Date Published: 1 September 2011
PDF: 6 pages
Opt. Eng. 50(9) 094401 doi: 10.1117/1.3617450
Published in: Optical Engineering Volume 50, Issue 9
Show Author Affiliations
Wei Rao, National Univ. of Defense Technology (China)
Siliang Niu, National Univ. of Defense Technology (China)
Nan Zhang, National Univ. of Defense Technology (China)
Chunyan Cao, National Univ. of Defense Technology (China)
Yongmin Hu, National Univ. of Defense Technology (China)


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