Share Email Print
cover

Proceedings Paper

Demodulation of micro fiber-optic Fabry-Perot interferometer using subcarrier and dual-wavelength method
Author(s): Zengling Ran; Yunjiang Rao; Zhiwei Liu; Fuguo Xu
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Subcarrier technology and dual-wavelength demodulation method are combined for tracking the cavity length variation of a micro fiber-optic fabry-periot (F-P). Compared with conventional dual-wavelength demodulation method, two operation wavelengths for demodulation are modulated with two different carrier frequencies, respectively, and then injected into optical link connected with the F-P cavity. Light power reflected for the two wavelengths is obtained by interrogating the powers of Fast Fourier Transform (FFT) spectrum at their carrier frequencies. Because the light at the two wavelengths experiences the same optical and electrical routes, measurement deviation resulting from the drift of optical and electrical links can be entirely eliminated.

Paper Details

Date Published: 17 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 775316 (17 May 2011); doi: 10.1117/12.884917
Show Author Affiliations
Zengling Ran, Univ. of Electronic Science and Technology of China (China)
Yunjiang Rao, Univ. of Electronic Science and Technology of China (China)
Zhiwei Liu, Univ. of Electronic Science and Technology of China (China)
Fuguo Xu, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

© SPIE. Terms of Use
Back to Top