[1] LIAO Y C, LIU B, LIU J, et al. High temperature （up to 950 ℃） sensor based on micro taper in-line fiber Mach–Zehnder interferometer （invited）[J]. Applied Sciences, 2019, 9（12）: 2394-1-2394-11.
[2] GENG Y, LI X, TAN X, et al. Compact and ultrasensitive temperature sensor with a fully liquid-filled photonic crystal fiber Mach-Zehnder interferometer[J]. IEEE Sensors Journal, 2014, 14: 167-170.
[6] XIA F, ZHAO Y. RI sensing system with high sensitivity and large measurement range using a microfiber MZI and a photonic crystal fiber MZI[J]. Measurement, 2020, 156: 107603-1-107630-8.
[7] XU S, CHEN H, FENG W. Fiber-optic curvature and temperature sensor based on the lateral offset spliced SMF-FCF-SMF interference structure[J]. Optics & Laser Technology, 2021, 141: 107174-1-107174-7.
[9] WANG H, MENG H, XIONG R, et al. Simultaneous measurement of refractive index and temperature based on asymmetric structures modal interference[J]. Optics Communications, 2016, 364: 191-194 .
[10] TALATAISONG W, WANG D, CHITAREE R, et al. Fiber in-line Mach-Zehnder interferometer based on an inner air-cavity for high-pressure sensing[J]. Optic Letters, 2015, 40: 1220-1222.
[11] LIAO H, LU P, FU X, et al. Sensitivity amplification of fiber-optic in-line Mach–Zehnder interferometer sensors with modified vernier-effect[J]. Optic Express, 2017, 25（22）: 26898-26909.
[12] WANG Z, HUANG L, LIU C, et al. Sensitivity-enhanced fiber temperature sensor based on vernier effect and dual in-line Mach-Zehnder interferometers[J]. IEEE Sensors Journal, 2019, 19（18）: 7983-7987.
[13] ZHU H, YUE Y, WANG Y, et al. High-sensitivity optical sensors based on cascaded reflective MZIs and microring resonators[J]. Optic Express, 2017, 25: 28612-28618.
[14] QUAN M, TIAN J, YAO Y. Ultra-high sensitivity Fabry-Perot interferometer gas refractive index fiber sensor based on photonic crystal fiber and vernier effect[J]. Optic Letters, 2015, 40: 4891-4894.
