[1] Zhang E Z, Lu D Q, Zhang S et al. High-sensitivity fiber-optic humidity sensor based on microfiber overlaid with niobium disulfide[J]. Journal of Materials Science, 55, 16576-16587(2020).

[2] Shao M, Sun H N, Zhang R et al. Michelson interferometric humidity sensor based on photonic crystal fiber[J]. Acta Optica Sinica, 40, 2406002(2020).

[3] Li J Z, Zhang J Q, Sun H et al. An optical fiber relative humidity sensor based on hollow-core fiber and hydroxypropyl methylcellulose hydrogel film[J]. Optik, 195, 163172(2019).

[4] Wang P P, Ni K, Wang B W et al. Methylcellulose coated humidity sensor based on Michelson interferometer with thin-core fiber[J]. Sensors and Actuators A, 288, 75-78(2019).

[5] Deng L, Zhang J Q, Sun H et al. Optical fiber temperature and humidity sensor based on film prepared by electrospinning nanofibers[J]. Laser & Optoelectronics Progress, 58, 0906006(2021).

[6] Wang Y Q, Shen C Y, Lou W M et al. Fiber optic humidity sensor based on the graphene oxide/PVA composite film[J]. Optics Communications, 372, 229-234(2016).

[7] Zhang P, Liu B, Liu Z D et al. Temperature and humidity sensor based on a graphene oxide-coated side-polished fiber Mach-Zehnder interferometer[J]. Acta Optica Sinica, 41, 0306003(2021).

[8] Liang L, Sun H, Liu N et al. High-sensitivity optical fiber relative humidity probe with temperature calibration ability[J]. Applied Optics, 57, 872-876(2018).

[9] Chiu Y D, Wu C W, Chiang C C. Tilted fiber Bragg grating sensor with graphene oxide coating for humidity sensing[J]. Sensors, 17, 2129(2017).

[10] Sun L P, Li J, Jin L et al. High-birefringence microfiber Sagnac interferometer based humidity sensor[J]. Sensors and Actuators B, 231, 696-700(2016).

[11] Yao J, Zhu T, Deng M et al. A humidity sensor based on all-fiber Fabry-Perot interferometer formed by large offset splicing[J]. Chinese Journal of Lasers, 39, s114004(2012).

[12] Li C, Yu X Y, Zhou W et al. Ultrafast miniature fiber-tip Fabry-Perot humidity sensor with thin graphene oxide diaphragm[J]. Optics Letters, 43, 4719-4722(2018).

[13] Xiao Y, Zhang J, Cai X et al. Fiber-optic humidity sensing based on graphene[J]. Acta Optica Sinica, 35, 0406005(2015).

[14] Bi W H, Zhu C Q, Fu X H et al. Optical fiber temperature and humidity sensor based on polyvinyl alcohol-aluminum film[J]. Journal of Optoelectronics·Laser, 25, 1443-1448(2014).

[15] Shao M, Zang Y X, Qiao X G et al. Humidity sensor based on hybrid fiber Bragg grating/abrupt fiber taper[J]. IEEE Sensors Journal, 17, 1302-1305(2017).

[16] Hu Y J, Ghaffar A, Hou Y L et al. A micro structure POF relative humidity sensor modified with agarose based on surface plasmon resonance and evanescent wave loss[J]. Photonic Sensors, 11, 392-401(2021).

[17] Xie W J, Yang M H, Cheng Y et al. Optical fiber relative-humidity sensor with evaporated dielectric coatings on fiber end-face[J]. Optical Fiber Technology, 20, 314-319(2014).

[18] Vaz A, Barroca N, Ribeiro M et al. Optical fiber humidity sensor based on polyvinylidene fluoride Fabry-Perot[J]. IEEE Photonics Technology Letters, 31, 549-552(2019).

[19] Gong Y, Rao Y J, Guo Y et al. Temperature-insensitive micro Fabry-Pérot strain sensor fabricated by chemically etching Er-doped fiber[J]. IEEE Photonics Technology Letters, 21, 1725-1727(2009).

[20] Sun H N, Shao M, Han L et al. Large core-offset based in-fiber Michelson interferometer for humidity sensing[J]. Optical Fiber Technology, 55, 102153(2020).