[1] [1] Song Yun, Zhu Tao, Rao Yunjiang et al.. A humidity sensor based on ultra-long-period fiber gratings with asymmetric refractive index modulation［J］. Chinese J. Lasers, 2009, 36(8): 2042～2045

[2] [2] Ignacio Del Villar, Carlos R. Zamarreo, Miguel Hernaez et al.. Resonances in coated long period fiber gratings and cladding removed multimode optical fibers: a comparative study［J］. Opt. Express, 2010, 18(19): 20183～20189

[3] [3] Zhang Xiangdong, Li Yulin, Peng Wenda et al.. Design and realization of temperature and relative humidity sensor based on FBG［J］. Acta Photonica Sinica, 2003, 32(10): 1166～1169

[4] [4] X. F. Huang, D. R. Sheng, K. F. Cen et al.. Low-cost relative humidity sensor based on thermoplastic polyimide-coated fiber Bragg grating ［J］. Sensors and Actuators B, 2007, 127: 518～524

[5] [5] Zhimei Qi, Itaru Honma, Haoshen Zhou. Humidity sensor based on localized surface plasmon resonance of multilayer thin films of gold nanoparticles linked with myoglobin［J］. Opt. Lett., 2006, 31(12): 1854～1856

[6] [6] Yu Wu, Tianhu Zhang, Yunjiang Rao et al.. Mininture interferometric humidity sensors based on silica/polymer microfiber knot resonators［J］. Sensors and Actuators B:Chemical, 2011, 155(1): 258～263

[7] [7] J. Mathew, Y. Semenova, G. Rajan et al.. Humidity sensor based on photonic crystal fibre interferometer［J］. Electron. Lett., 2010, 46(19): 1341～1343

[8] [8] Lei Zhang, Fuxing Gu, Jingyi Lou et al.. Fast detection of humidity with a subwavelength-diameter fiber taper coated with gelatin film［J］. Opt. Express, 2008, 16(17): 13349～13353

[9] [9] Qiang Wu, Yuliya Semenova, Jinesh Mathew et al.. Humidity sensor based on a single-mode hetero-core fiber structure［J］. Opt. Lett., 2011, 36(10): 1752～1754

[10] [10] Deng Ming, Rao Yunjiang, Zhu Tao et al.. Refractive-index sensor based on photonic crystal fiber Fabry-Pérot interferometer with self temperature compensation［J］. Acta Optica Sinica, 2009, 29(7): 1790～1795

[11] [11] Jiang Desheng, Wei Renxuan. Solution concentration measurement system based on fiber Fabry-Pérot interference wavelength ［J ］. Chinese J. Lasers, 2004, 31(9): 1127～1131

[12] [12] Zhu Tao, Xu Min, Rao Yunjiang et al.. Miniature humidity sensor based on all-fiber Fabry-Pérot interferometer formed by hollow core fiber［J］. Acta Optica Sinica, 2010, 30(6): 1592～1596

[13] [13] Bi Weihong. Mathematical model for fiber-optical nonsymmetrical Fabry-Perot interferometeric cavity［J］. Acta Optica Sinica, 2000, 20(7): 873～878