[1] Ping LU, N LALAM, M BADAR et al. Distributed optical fiber sensing: review and perspective. Applied Physics Reviews, 6, 041302(2019).

[2] H APRIYANTO, G RAVET, O D BERNAL et al. Comprehensive modeling of multimode fiber sensors for refractive index measurement and experimental validation. Scientific Reports, 8, 5912(2018).

[3] Yulan ZHANG, Yongfeng WU, Yang HAN et al. High sensitivity strain sensor based on a novel offset-core single micro-tapered fiber-optic Mach-Zehnder interferometer. Optical Fiber Technology, 73, 103012(2022).

[4] Siyu LIN, Yundong ZHANG, Yanchen QU et al. A miniature high-temperature fiber-optic sensor based on tip-packaged Fabry-Perot interferometer. Sensors and Actuators A: Physical, 350, 114122(2023).

[5] Chunliu ZHAO, Zhiqiang WANG, Shuqin ZHANG et al. Phenomenon in an alcohol not full-filled temperature sensor based on an optical fiber Sagnac interferometer. Optics Letters, 37, 4789-4791(2012).

[6] R M MANUEL, D A ARRIOJA, J A MIJANGOS et al. Ultra-high-sensitivity temperature sensor using a fiber loop mirror based on a water-filled asymmetric two-hole fiber. IEEE Sensors Journal, 20, 5953-5961(2020).

[7] Yuqiang YANG, Yongguang WANG, Yuxin ZHAO et al. Sensitivity-enhanced temperature sensor by hybrid cascaded configuration of a Sagnac loop and a F-P cavity. Optics Express, 25, 33290-33296(2017).

[8] Xuefang ZHOU, Yu ZHOU, Zengyang LI et al. Research on temperature sensing characteristics with cascaded fiber Sagnac interferometer and fiber Fabry-Perot interferometer-based fiber laser. Optical Engineering, 58, 057103(2019).

[9] Wanmei SHEN, Chao JIANG, Xiaoshan GUO et al. High sensitivity temperature sensors based on Sagnac interferometers cascading. Laser & Infrared, 52, 740-744(2022).

[10] Sijie CHEN, Pan PAN, Tongtong XIE et al. Sensitivity enhanced fiber optic temperature sensor based on optical carrier microwave photonic interferometry with harmonic Vernier effect. Optics & Laser Technology, 160, 109029(2023).

[11] Ji LIU, NAN Pengyu, Qin TIAN et al. Sensitivity enhanced strain sensor based on two-arm Vernier effect. IEEE Photonics Technology Letters, 33, 375-378(2021).

[12] Hao LIAO, Ping LU, Xin FU et al. Sensitivity amplification of fiber-optic in-line Mach-Zehnder Interferometer sensors with modified Vernier-effect. Optics Express, 25, 26898-26909(2017).

[13] Peng ZHANG, Ming TANG, Feng GAO et al. Cascaded fiber-optic Fabry-Perot interferometers with Vernier effect for highly sensitive measurement of axial strain and magnetic field. Optics Express, 22, 19581-19588(2014).

[14] Liyang SHAO, Yuan LUO, Zhiyong ZHANG et al. Temperature sensor with enhanced sensitivity by cascaded fiber optic Sagnac loops, 915728(2014).

[15] A D GOMES, M S FERREIRA, J BIERLICH et al. Optical harmonic Vernier effect: A new tool for high performance interferometric fiber sensors. Sensors, 19, 5431(2019).

[16] A D GOMES, M S FERREIRA, J BIERLICH et al. Hollow microsphere combined with optical harmonic Vernier effect for strain and temperature discrimination. Optics & Laser Technology, 127, 106198(2020).

[17] Shuang LIU, Guangwei LU, Dongyu LV et al. Sensitivity enhanced temperature sensor with cascaded Sagnac loops based on harmonic Vernier effect. Optical Fiber Technology, 66, 102654(2021).

[18] Binqing WU, Chunliu ZHAO, Ben XU et al. Optical fiber hydrogen sensor with single Sagnac interferometer loop based on Vernier effect. Sensors and Actuators B: Chemical, 255, 3011-3016(2018).

[19] Binqing WU, Chunliu ZHAO, Ben XU. Optical fiber temperature sensor with single Sagnac interference loop based on Vernier effect, 1-3(2017).

[20] Zeren LI, Wenjie DANG, Jinxiao DAN et al. High-sensitivity interferometric high-temperature strain sensor based on optical harmonic Vernier effect. Optical Fiber Technology, 79, 103361(2023).