[5] [5] FABIO M, FILIPPO B, GALATI N, et al. Distrited strain measurement in steel bridge with fiber optic sensors: validation through diagnostic load test[J]. Journal Perform Constr FAC, 2008, 22: 264-273.

[6] [6] LIU S P, SHI B, GU K, et al. Fiber-optic wireless sensor network using ultra-weak fiber Bragg gratings for vertical subsurface deformation monitoring [J]. Natural Hazards, 2021, 109(3): 1-17.

[8] [8] ZHOU J, WANG Y, LIAO C, et al. Intensity-modulated strain based on fiber in-line mach-zehnder interferometer[J]. IEEE Photonics Technology Letters, 2014, 26(5): 508-511.

[9] [9] SUN H, YANG S, ZHANG X, et al. Simultaneous measurement of temperature and strain or temperature and curvature based on an optic fiber Mach-Zehnder interferometer[J]. 2015, 340: 39-43.

[11] [11] MARTA S, PAULO R, BIERLICH J, et al. Fabry-Perot cavity based on silica sensing at high temperature[J]. Optics Express, 2015, 23(13): 16064-16070.

[12] [12] CHEN L X, LI Y. Application of optical fiber sensor based on optical vortex to high resolution strain measurement[C]//SPIE. Advanced Sensor Systems&Applications VI. Bellingham: SPIE, 2014: 9240-9243.

[13] [13] LV R, QIU L, HU H, et al. The phase interrogation method for optical fiber sensor by analyzing the fork interference pattern[J]. Applied Physics B, 2018, 124(2): 2-6.