[1] KYUMA K, TAI S, NUNOSHITA M. Development of fibre optic sensing systems-A review[J]. Optics & Lasers in Engineering, 3, 155-182(1982).

[2] LIU Z X, SHEN C Y, XIAO Y K. Liquid surface tension and refractive index sensor based on a tilted fiber Bragg grating[J]. Journal of the Optical Society of America B, 35, 1282-1287(2018).

[3] CHU J, SHEN C, QIAN F. Simultaneous measurement of strain and temperature based on a long-period grating with a polarization maintaining fiber in a loop mirror[J]. Optical Fiber Technology, 20, 44-47(2014).

[4] LEAL-JUNIOR A G, ANSELMO F, AVELLAR L M. Design considerations， analysis， and application of a low-cost， fully portable， wearable polymer optical fiber curvature sensor[J]. Applied Optics, 57, 6927-6936(2018).

[5] LIU Y G, LIU X, MA C J. Micro-structured optical fiber sensor for simultaneous measurement of temperature and refractive index[J]. Optical Fiber Technology, 41, 168-172(2018).

[6] BAI X H, HU M L, GANG T T. Simultaneous acoustic and magnetic measurement using cascaded fibre Bragg grating[J]. Optical Fiber Technology, 45, 376-382(2018).

[7] NGUYEN L V, VASILIEV M, ALAMEH K. Three-wave fiber Fabry-Pérot interferometer for simultaneous measurement of temperature and water salinity of seawater[J]. IEEE Photonics Technology Letters, 23, 450-452(2011).

[8] AMEEN O F, YOUNUS M H, AZIZ M S. Graphene diaphragm integrated FBG sensors for simultaneous measurement of water level and temperature[J]. Sensors and Actuators A：Physical, 252, 225-232(2016).

[9] ZHANG T, LIU Y G, YANG D Q. Constructed fiber-optic FPI-based multi-parameters sensor for simultaneous measurement of pressure and temperature， refractive index and temperature[J]. Optical Fiber Technology, 49, 64-70(2019).

[10] ALBERTO N J, MARQUES C A, PINTO C A. Three-parameter optical fiber sensor based on a tilted fiber Bragg grating[J]. Applied Optics, 49, 6085-6091(2010).

[11] SAINI S S, JEONG M Y. Simultaneous measurement of refractive index，temperature，and strain using etched-core fiber Bragg grating sensors[J]. IEEE Photonics Technology Letters, 22, 1431-1433(2010).

[12] TONG Z R, WANG J Y, ZHANG W H. Simultaneous measurement of refractive index， temperature and strain based on core diameter mismatch and polarization-maintaining FBG[J]. Optoelectronics Letters, 9, 238-240(2013).

[13] OLIVEIRA R, OSÓRIO J H, ARISTILDE S. Simultaneous measurement of strain， temperature and refractive index based on multimode interference， fiber tapering and fiber Bragg gratings[J]. Measurement Science and Technology, 27, 075107(2016).

[14] KORGANBAYEV S, AYUPOVA T, SYPABEKOVA M. Partially etched chirped fiber Bragg grating （pECFBG） for joint temperature， thermal profile， and refractive index detection[J]. Optics Express, 26, 18708-18720(2018).

[15] YU J H, XU S S, JIANG Y. Multi-parameter sensor based on the fiber Bragg grating combined with triangular-lattice four-core fiber[J]. Optik, 208, 164094(2020).

[16] PANG F F, XIANG W C, GUO H R. Special optical fiber for temperature sensing based on cladding-mode resonance[J]. Optics Express, 16, 12967-12972(2008).

[17] ZHANG N, XU W, YOU S H. Simultaneous measurement of refractive index， strain and temperature using a tapered structure based on SMF[J]. Optics Communications, 410, 70-74(2018).

[18] GAO X K, NING T, ZHENG J J. Simultaneous measurement of refractive index， strain， and temperature based on a Mach-Zehnder interferometer with hybrid structure optical fiber[J]. Applied Optics, 58, 8187-8193(2019).

[19] LIU Mingsheng, LIANG Lili, LI Yang. Performance analysis of long period fiber grating temperature sensing[J]. Laser & Optoelectronics Progress, 51, 010501(2014).

[20] BHATIA V, VENGSARKAR A M. Optical fiber long-period grating sensors[J]. Optics Letters, 21, 692-694(1996).