Share Email Print
cover

Proceedings Paper

Demodulation system of fiber grating sensors based on phase-lock and cross phase modulation
Author(s): Jinlong Zhang; Chongxiu Yu; Kuiru Wang; Meimei Lin; Junying Zeng
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

The XPM technique is applied to the demodulation system for fiber grating sensor for the first time in this thesis. According to XPM principle, the intensity of accessorial light can be altered by feedback control and the phase of the light signal from the M-Z interferometer can be modulated in a phase-locked way, thus the system phase-difference can be locked at the point of the highest sensitivity. It resolves the precision non-linearity of interferometric demodulation, the limit of very small range for demodulating, the non-linearity of the demodulating sensitivity, the affect of backlight and undercurrent pair in the demodulating circuit, the delay-effect by PZT tune and the error from the machine.

Paper Details

Date Published: 21 November 2007
PDF: 8 pages
Proc. SPIE 6781, Passive Components and Fiber-based Devices IV, 67812L (21 November 2007); doi: 10.1117/12.743730
Show Author Affiliations
Jinlong Zhang, Beijing Univ. of Posts and Telecommunications (China)
Henan Univ. (China)
Chongxiu Yu, Beijing Univ. of Posts and Telecommunications (China)
Kuiru Wang, Beijing Univ. of Posts and Telecommunications (China)
Meimei Lin, Beijing Univ. of Posts and Telecommunications (China)
Junying Zeng, Beijing Univ. of Posts and Telecommunications (China)


Published in SPIE Proceedings Vol. 6781:
Passive Components and Fiber-based Devices IV
Ming-Jun Li; Jianping Chen; Satoki Kawanishi; Ian H. White, Editor(s)

© SPIE. Terms of Use
Back to Top