[1] [1] LUO Y J,LUO J H.Experimental research on cholesterol solution concentration sensing based on tilted fiber Bragg grating[J].Optoelectronics Letters,2021,17(11):661-664.

[2] [2] ZHANG S,DENG S F,WANG Z M,et al.Optimization and experiment of a miniature multimode fiber induced-LPG refractometer[J].OSA Continuum,2019,2(7):2190-2198.

[3] [3] WANG Y J,LI S G,LI J S,et al.High-sensitivity refractive index sensing and broadband tunable polarization filtering characteristics of D-shaped micro-structured fiber with single-layer air-holes and gold film based on SPR[J].Journal of Lightwave Technology,2022,40(3):863-871.

[5] [5] ZHANG S,DENG S F,WANG Z M,et al.A compact refractometer with high sensitivity based on multimode fiber embedded single mode-no core-single mode fiber structure[J].Journal of Lightwave Technology,2020,38(7):1929-1935.

[6] [6] GAO S C,ZHANG W G,GENG P C,et al.Highly sensitive in-fiber refractive index sensor based on down-bitaper seeded up-bitaper pair[J]. IEEE Photonics Technology Letters,2012,24(20):1878-1881.

[7] [7] LIU Y C,LI S G,CHEN H L,et al.Surface plasmon resonance induced high sensitivity temperature and refractive index sensor based on evanescent field enhanced photonic crystal fiber[J].Journal of Lightwave Technology,2020,38(4):919-928.

[8] [8] LI B,YAN X,ZHANG X N,et al.No-core optical fiber sensor based on surface plasmon resonance for glucose solution concentration and temperature measurement[J].Optics Express,2021,29(9):12930-12940.

[10] [10] WANG P F,BRAMBILLA G,DING M,et al.High-sensitivity, evanescent field refractometric sensor based on a tapered, multimode fiber interference[J].Optics Letters,2011,36(12):2233-2235.

[11] [11] WU Q,SEMENOVA Y,WANG P F,et al.High sensitivity SMS fiber structure based refractometer-analysis and experiment[J].Optics Express,2011,19(9):7937-7944.

[12] [12] ZHAO R,SHU X W,WANG P.High-performance bending sensor based on femtosecond laser-inscribed in-fiber Mach-Zehnder interferometer[J].Journal of Lightwave Technology,2020,38(20):6371-6378.

[13] [13] DING Z W,LANG T T,WANG Y,et al.Surface plasmon resonance refractive index sensor based on tapered coreless optical fiber structure[J].Journal of Lightwave Technology,2017,35(21):4734-4739.

[14] [14] YANG J,YANG M,GUAN C Y,et al.In-fiber Mach-Zehnder interferometer with piecewise interference spectrum based on hole-assisted dual-core fiber for refractive index sensing[J].Optics Express,2018,26(15):19091-19099.

[15] [15] XIE N J,ZHANG H,LIU B,et al.In-line microfiber-assisted Mach-Zehnder interferometer for microfluidic highly sensitive measurement of salinity[J].IEEE Sensors Journal,2018,18(21):8767-8772.