Fiber grating sensor demodulation method based on polarization interference | Zendy

Zhang Jinlong | Zendy; Yu Chong-Xiu | Zendy; Kuiru Wang | Zendy; Zhao De-xin | Zendy; 林妹妹 Lin Meimei | Zendy; Cheng Li | Zendy

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Fiber grating sensor demodulation method based on polarization interference

Author(s) -

Zhang Jinlong,

Yu Chong-Xiu,

Kuiru Wang,

Zhao De-xin,

林妹妹 Lin Meimei,

Cheng Li

Publication year - 2009

Publication title -

acta physica sinica

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.

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