The bending photonic crystal fiber grating sensor is an important role in underwater monitoring and fire alarm systems. It is studied that the resonant wavelength expression of bending long period photonic crystal fiber gratings is deduced, it is designed that a bending long period photonic crystal fiber grating sensor system, it is calculated in theory that between the bending long period photonic crystal fiber gratings sensor resonance wavelength and the grating period and the bending strain. The result is shown by calculating and analysing in theory, the grating curvature is increased by the increase of the bending strain of the grating, and the resonance wavelength of the grating sensor is drifted, the drift amount is increased, one in this grating, the drifted amount of the resonant wavelength is 0.014 nm.
References
[1]
[1] Naeem, K., Kim, B.H., Kim, B., et al. (2015) High-Sensitivity Temperature Sensor Based on a Selectively-Polymer- Filled Two-Core Photonic Crystal Fiber In-Line Interferometer. IEEE Sensors Journal, 15, 3998-4003.
http://dx.doi.org/10.1109/JSEN.2015.2405911
[2]
Ademgil, H., Haxha, S., Gorman, T., et al. (2009) Bending Effects on Highly Birefringent Photonic Crystal Fibers with Low Chromatic Dispersion and Low Confinement Losses. J. Lightw. Technol., 27, 559-567.
http://dx.doi.org/10.1109/JLT.2008.2004813
[3]
Yan, P.G., Zhang, G.L., Wei, H.F., et al. (2013) Double Cladding Seven-Core Photonic Crystal Fibers with Different GVD Properties and Fundamental Supermode Output. J. Lightw. Technol., 31, 3658-3662.
http://dx.doi.org/10.1109/JLT.2013.2286210
[4]
Jan, C., Jo, W., Digonnet, M.J.F., et al. (2016) Photon-ic-Crystal-Based Fiber Hydrophone with Sub-100Pa/HZ Pressure Resolution. IEEE Photonics Technology Letters, 34, 123-126. http://dx.doi.org/10.1109/LPT.2015.2487498
[5]
Zhou, F., Qiu, S.-J., Luo, W., et al. (2014) An All-Fiber Reflective Hydrogen Sensor Based on a Photonic Crystal Fiber In-Line Interferometer. IEEE Sensors Journal, 14, 1133-1136.
[6]
Deng, M., Sun, X.K., Wei, H.F., et al. (2014) Photonic Crystal Fiber-Based Modal Interferometer for Refractive Index Sensing. IEEE Photon. Technol. Lett., 26, 531-534. http://dx.doi.org/10.1109/LPT.2013.2293601
[7]
Zhao, Y., Xia, F. and Li, J. (2016) Sensitivity-Enhanced Photonic Crystal Fiber Refractive Index Sensor with Two Waist-Broadened Tapers. Journal of Lightwave Technology, 34, 1373-1379.
http://dx.doi.org/10.1109/JLT.2016.2519534
[8]
Jin, L., Jin, W. and Ju, J. (2009) Directional Bend Sensing with a CO-Laser-Inscribed Long Period Grating in a Photonic Crystal Fiber. J. Lightw. Technol., 27, 4884-4891. http://dx.doi.org/10.1109/JLT.2009.2026723
[9]
Shao, L.-Y., Xiong, L.Y., Chen, C.K., et al. (2010) Directional Bend Sensor Based on Re-Grown Tilted Fiber Bragg Grating. J. Lightw. Technol., 28, 2681-2687. http://dx.doi.org/10.1109/JLT.2010.2064158
[10]
Block, U.L., Dangui, V. and Digonnet, M.J.F. (2006) Origin of Ap-parent Resonance Mode Splitting in Bent Long-Pe- riod Fiber Gratings. J. Lightw. Technol., 24, 1027-1034.
Beaudou, B., Bhardwaj, A., Bradley, T.D., et al. (2014) Macro Bending Losses in Single-Cell Kagome-Lattice Hol-low-Core Photonic Crystal Fibers. J. Lightw. Technol., 32, 1370-1373. http://dx.doi.org/10.1109/JLT.2014.2304303
