9 November 2010 Deflection measurement using long-period grating sensor fabricated on side-hole single-mode fiber by CO2-laser
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Abstract
In this paper, an optical Long-period fiber grating (LPG) fabricated by CO2 laser in side-hole single-mode fiber (SHLPG) for cantilever deflection measurement was demonstrated according with LPG flexural character. resonance wavelength of SHLPG (1547.3nm) has a total blue shift of approximately -0.83nm for deflection ranging from 0 to 40mm, and a red shift of 0.74nm with deflection ranging from 0 to -40mm. The results indicated that the SHLPG owns higher deflection sensitivity than that of normal LPG and fiber Bragg grating. The deflection sensitivity coefficient of SHLPG is -0.202nm/mm. The resonance wavelength shift has a good linear with the deflection increasing. The correlative coefficient is 0.9966. Factual deflection measuring can be got with high sensitivity through SHLPG easily.
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Juan Kang, Juan Kang, Mengchao Li, Mengchao Li, Jianfeng Wang, Jianfeng Wang, Xinyong Dong, Xinyong Dong, } "Deflection measurement using long-period grating sensor fabricated on side-hole single-mode fiber by CO2-laser", Proc. SPIE 7853, Advanced Sensor Systems and Applications IV, 78532E (9 November 2010); doi: 10.1117/12.869808; https://doi.org/10.1117/12.869808
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