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Proceedings Paper

Research on fiber sensor demodulating technique using tilted fiber Bragg gratings
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Paper Abstract

Tilted fibre Bragg grating (TFBG) belongs to short-period gratings family; there is core mode and a lot of cladding modes in the transmission spectrum. According to the special structure and coupling characteristic of the TFBG, we propose a novel method of edge filter linear demodulation using tilted fiber Bragg gratings in a fiber sensor system. The results show that the widely linear range of katabatic edge (1505nm~1535nm) and an assurgent edge (1545nm~1565nm) can be used in edge filtering; the thermal characteristic of the core mode and cladding modes is similar to FBG's. Therefore, it can compensate dynamically the temperature shift of the FBG and the effect of temperature noise on the strain or other sensing signals is eliminated. The advantages of this simple system are an all-fiber design, quasi static and dynamic operation, high stability and lower cost.

Paper Details

Date Published: 11 November 2008
PDF: 3 pages
Proc. SPIE 7134, Passive Components and Fiber-based Devices V, 71340P (11 November 2008); doi: 10.1117/12.802822
Show Author Affiliations
Yinping Miao, Nankai Univ. (China)
Bo Liu, Nankai Univ. (China)
Weihua Zhang, Nankai Univ. (China)
Qida Zhao, Nankai Univ. (China)


Published in SPIE Proceedings Vol. 7134:
Passive Components and Fiber-based Devices V
Ming-Jun Li; Ping Shum; Ian H. White; Xingkun Wu, Editor(s)

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