Bending characteristics of long-period fiber grating with an over-coupled resonant wavelength

Xiaozhong Tian; Chunying Guan; Shuqiang Li; Xing Zhong; Libo Yuan

doi:10.1117/12.999518

30 November 2012 Bending characteristics of long-period fiber grating with an over-coupled resonant wavelength

Xiaozhong Tian, Chunying Guan, Shuqiang Li, Xing Zhong, Libo Yuan

Proceedings Volume 8561, Advanced Sensor Systems and Applications V; 856112 (2012) https://doi.org/10.1117/12.999518
Event: Photonics Asia, 2012, Beijing, China

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.

Citation Download Citation

Xiaozhong Tian, Chunying Guan, Shuqiang Li, Xing Zhong, and Libo Yuan "Bending characteristics of long-period fiber grating with an over-coupled resonant wavelength", Proc. SPIE 8561, Advanced Sensor Systems and Applications V, 856112 (30 November 2012); https://doi.org/10.1117/12.999518

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