Open AccessFiber grating sensor demodulation method based on polarization interference
Author(s) -
Jinlong Zhang,
Chongxiu Yu,
Kuiru Wang,
Dexin Zhao,
Min Lin,
Cheng Li
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.3988
Subject(s) - demodulation , fiber bragg grating , optics , wavelength , fiber optic sensor , materials science , polarization (electrochemistry) , interference (communication) , polarization maintaining optical fiber , optical fiber , physics , computer science , telecommunications , channel (broadcasting) , chemistry
A novel wavelength shift detection scheme for use in fiber Bragg grating sensing systems is proposed. The structure of the polarization maintaining fiber loop mirror is studied and its theoretical model is established. In addition, the distribution characteristics of the input light wavelength and the output power are analysed. Moreover, numerical simulation and experimental validation are also performed. The results show that the device has simple structure, high stability and high detection precision. The measuring range and the precision can be adjusted by varying the parameters of the fiber loop mirror. In the demodulation range larger than 1 nm, the average precision of the wavelength demodulation is lower than 1 pm.