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Proceedings Paper

Bending characteristics of long-period fiber grating with an over-coupled resonant wavelength
Author(s): Xiaozhong Tian; Chunying Guan; Shuqiang Li; Xing Zhong; Libo Yuan
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Paper Abstract

A CO2-induced LPG with an over-coupled resonant dip is fabricated. The bending characteristics of proposed LPG are experimentally studied in detail. The results show that the spacing between the two resonant wavelengths has a periodic behavior along circular directions. The spacing between the two resonant wavelengths changes nearly linearly against the curvature under certain bending directions. The bend sensitivities under two bending directions are 7.19nm/m and 3.13nm/m, respectively. In addition, the over-coupled dip splits into two dips when increases curvature under a special bending direction, which may be attributed to that new cladding mode meet coupling condition is excited.

Paper Details

Date Published: 30 November 2012
PDF: 4 pages
Proc. SPIE 8561, Advanced Sensor Systems and Applications V, 856112 (30 November 2012); doi: 10.1117/12.999518
Show Author Affiliations
Xiaozhong Tian, Harbin Engineering Univ. (China)
Chunying Guan, Harbin Engineering Univ. (China)
Shuqiang Li, Harbin Engineering Univ. (China)
Xing Zhong, Harbin Engineering Univ. (China)
Libo Yuan, Harbin Engineering Univ. (China)


Published in SPIE Proceedings Vol. 8561:
Advanced Sensor Systems and Applications V
Brian Culshaw; Yanbiao Liao; Anbo Wang; Xiaoyi Bao; Xudong Fan, Editor(s)

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