[1] WERNECK M M, PINTO P H S, BELLINI R T et al. Optical sensor for monitoring leakage current and weather conditions in a 500-kv transmission line[J]. Sensors, 22, 5034-5041(2022).

[2] KOLPAKOV S A, GORDON N T, MOU C et al. Toward a new generation of photonic humidity sensors[J]. Sensors, 14, 3986-4013(2014).

[3] LI Xiaokang, SUN Binchuan, XUE Ting et al. MXene-based fiber-optic humidity sensor for fast human breath monitoring[J]. Photonics, 11, 79(2024).

[4] GUAN Yunqing, ZHANG Ting, DONG Xiaopeng et al. Sensor for simultaneous measurement of temperature and humidity based on a chirped fiber Bragg grating partially bonded with thick polyimide film[J]. IEEE Sensors Journal, 23, 24583-24590(2023).

[5] QIAN Jiangxiao, WANG Wei, CHEN Haibin et al. In-fiber breathing monitoring sensor by micro-tapered long-period grating structure[J]. IEEE Sensors Journal, 23, 154-158(2023).

[6] LI Yuzhuo, LI Xisheng, LIU Yin et al. High sensitivity Mach-Zehnder interferometric fiber-optic humidity sensor based on multimode interference enhancement[J]. Optical Fiber Technology, 87, 103891(2024).

[7] MA Chaoqun, PENG Donghong, BAI Xuanyao et al. A review of optical fiber sensing technology based on thin film and Fabry-Perot cavity[J]. Coatings, 13, 1277(2023).

[8] WANG Bo, TIAN Jiajun, HU Ling et al. High sensitivity humidity fiber-optic sensor based on all-agar Fabry-Perot interferometer[J]. IEEE Sensors Journal, 18, 4879-4885(2018).

[9] CHEN Maoqing, ZHAO Yong, WEI Heming et al. 3D printed castle style Fabry-Perot microcavity on optical fiber tip as a highly sensitive humidity sensor[J]. Sensors and Actuators B: Chemical, 328, 103891(2021).

[10] WANG Qiying, ZHANG Fangfang, ZHANG Mengfan et al. FP interferometric optic fiber humidity sensor based on acrylate AB adhesive film[J]. Photonics, 10, 873(2023).

[11] ZHANG Senpeng, DONG Bo, CHEN Zongyu et al. Pentaerythritol tetraacrylate microcavity sensor for high performance relative humidity detection[J]. Sensors and Actuators A: Physical, 366, 114981(2024).

[12] YUAN Jingyu, YU Ruowei, XIAO Limin et al. Bessel-like beams generated via fiber-based polymer microtips[J]. Optics Letter, 44, 1007-1010(2019).

[13] MOHAMMED P A. Optical and mechanical properties of self-written polymer waveguide between single mode optical fibers using UV photocurable monomer system[J]. European Polymer Journal, 139, 109950(2020).

[14] HU Zixian, CHEN Yuxing, TAN Jingyu et al. A hybrid self-growing polymer microtip for ultracompact and fast fiber humidity sensing[J]. Sensors and Actuators B: Chemical, 346, 130462(2021).

[15] PHAM TN, GUERRAULT S, AYEAL C et al. Polymer microtip-based Fabry-Perot interferometer for water content determination in the gas and liquid phase[J]. ACS Applied Materials & Interfaces, 15, 46368-46378(2023).

[16] YANG Zongru, YUAN Weihao, WANG Yu et al. Compact hybrid interferometer based on twin- core side hole fiber and harmonic vernier effect for gas pressure measurement[J]. IEEE Sensors Journal, 24, 6173-6180(2024).

[17] LANG Changpeng, LIU Yi, CAO Kunjian et al. Ultra-compact, fast-responsive and highly-sensitive humidity sensor based on a polymer micro-rod on the end-face of fiber core[J]. Sensors and Actuators B: Chemical, 290, 23-27(2019).

[18] ZHONG Yusong, DONG Xinyong, XU Pengbai et al. Optical fiber and gelatin based Fabry-Perot interferometric humidity sensor[J]. Acta Photonica Sinica, 50, 1206003(2021).

[19] MOHAMMED PA, WADSWOR T J. Effect of curing beam intensity and photoinitiator concentration on the geometrical features and optical transmission of light induced polymer waveguides[J]. Optics & Laser Technology, 134, 106655(2021).

[20] YANG Zongru, YUAN Weihao, WANG Yu et al. Compact hybrid interferometer based on twin- core side hole fiber and harmonic vernier effect for gas pressure measurement[J]. IEEE Sensors Journal, 24, 6173-6180(2024).

[21] ZHANG Zhaoxu, GONG Huaping, YU Changgui et al. An optical fiber humidity sensor based on femtosecond laser micromachining Fabry-Perot cavity with composite film[J]. Optics & Laser Technology, 150, 107949(2022).

[22] ZHANG Yaxun, LIU Piliang, YU Jinjian et al. Highly humidity sensitive Fabry-Perot interferometer sensor based on a liquid-solid microcavity for breath monitoring[J]. Optical Fiber Technology, 84, 103761(2024).

[23] ZHAO Cong, LIU Dan, XU Gaixia et al. Recent advances in fiber optic sensors for respiratory monitoring[J]. Optical Fiber Technology, 72, 103000(2022).

[24] LUO Si, DING Yunlian, ZHU Xiaoshuai et al. Lab-on-fiber humidity sensor for real-time respiratory rate monitoring[J]. IEEE Sensors Journal, 24, 20663-20668(2024).