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11 November 2014 Long period fiber grating sensor in hollow eccentric optical fiber
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The bending characteristics of the long period fiber grating (LPFG) in hollow eccentric optical fiber (HEOF) were investigated experimentally. The results indicate that the HEOF-LPFG is insensitive to the bending and the biggest sensitivity only is 1.3nm/m-1 in the range of 0~5m-1. More than that, the dependences of the resonant peak on the temperature and the axial strain were also studied, obtaining the response of 56.7 pm/°С and 0.3 pm/με, respectively. Obviously, the HEOF-LPFG is more sensitive to the temperature and immune to the curvature and the strain. The HEOF-LPFG can be employed to measure the single parameter and simplify the measurement equipment in the practical application.
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Xing Zhong, Guopei Mao, Tingting Yuan, Chunying Guan, and Li-Bo Yuan "Long period fiber grating sensor in hollow eccentric optical fiber", Proc. SPIE 9274, Advanced Sensor Systems and Applications VI, 92741H (11 November 2014);

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