Share Email Print

Proceedings Paper

Study on demodulation algorithm of fiber optic Fabry-Perot sensors based on spectrum adjusting
Author(s): Wentao Zhang; Jingyun Dai; Baochen Sun; Yanliang Du
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

This paper aims at proposing a modified algorithm based on spectrum adjusting. The theoretical analysis of the error between the real light source spectrum and the Gaussian spectrum is presented. The hardware of the demodulation system is introduced, including the coupler, collimation lens, volume phase grating, focus lens, CCD array, A/D card, and PC. The modified algorithm will adjust the interferometric spectrum of the sensor by getting rid of the effect of the light source spectrum. Experiment was carried out to test the performance of the demodulation system. It can be found from the result that the algorithm has improved the accuracy of the demodulation system significantly. The demodulation accuracy for the strain sensor is better than 0.5 microstrain.

Paper Details

Date Published: 26 November 2007
PDF: 6 pages
Proc. SPIE 6830, Advanced Sensor Systems and Applications III, 68301N (26 November 2007); doi: 10.1117/12.757091
Show Author Affiliations
Wentao Zhang, Shijiazhuang Railway Institute (China)
Institute of Semiconductors (China)
Jingyun Dai, Shijiazhuang Railway Institute (China)
Baochen Sun, Shijiazhuang Railway Institute (China)
Yanliang Du, Shijiazhuang Railway Institute (China)

Published in SPIE Proceedings Vol. 6830:
Advanced Sensor Systems and Applications III
Yun-Jiang Rao; Yanbiao Liao; Gang-Ding Peng, Editor(s)

© SPIE. Terms of Use
Back to Top