[1] [1] Shen C Y, Zhong C, You Y, et al. Polarization-dependent curvature sensor based on an in-fiber Mach-Zehnder interferometer with a difference arithmetic demodulation method[J]. Optics Express, 2012, 20(14): 15406-15417.

[2] [2] Chen Wei, Meng Zhou, Zhou Huijuan, et al. Nonlinear phase noise analysis of long-haul interferometric fiber sensing system[J]. Acta Physica Sinica, 2012, 61(18): 184210.

[3] [3] Chen Z H, Lau D, Teo J T, et al. Simultaneous measurement of breathing rate and heart rate using a microbend multimode fiber optic sensor[J]. Journal of Biomedical Optics, 2014, 19(5): 057001.

[4] [4] Liu G G, Han M, Hou W L. High-resolution and fast-response fiber-optic temperature sensor using silicon Fabry-Pérot cavity[J]. Optics Express, 2015, 23(6): 7237-7247.

[5] [5] Xiong Yikun, Huang Xuguang. Optical fiber sensor for liquid refractive index based on fiber optic taper[J]. Acta Optica Sinica, 2009, 29(7): 1956-1960.

[6] [6] Zhang Yulong, Jia Dagong, Li Shuai, et al. Study of displacement sensor based on few-mode multi-core fiber[J]. Chinese J Lasers, 2014, 41(9): 0905006.

[7] [7] Wu D, Zhu T, Deng M, et al. Refractive index sensing based on Mach-Zehnder interferometer formed by three cascaded single-mode fiber tapers[J]. Applied Optics, 2011, 50(11): 1548-1553.

[8] [8] Gong Yuan, Guo Yu, Rao Yunjiang, et al. Sensitivity analysis of hybrid fiber Fabry-Pérot refractive-index sensor[J]. Acta Physica Sinica, 2011, 60(6): 064202.

[9] [9] Zhu S, Pang F F, Huang S J, et al. High sensitivity refractive index sensor based on adiabatic tapered optical fiber deposited with nanofilm by ALD[J]. Optics Express, 2015, 23(11): 13880-13888.

[10] [10] Shao M, Qiao X G, Fu H W, et al. An in-fiber Mach-Zehnder interferometer based on arc-induced tapers for high sensitivity humidity sensing[J]. IEEE Sensors Journal, 2013, 13(5): 2026-2031.

[11] [11] Harith Z, Irawati N, Rafaie A H, et al. Tapered plastic optical fiber coated with Al-doped ZnO nanostructures for detecting relative humidity[J]. IEEE Sensors Journal, 2015, 15(2): 845-849.

[12] [12] Fu Haiwei, Xu Shichao, Qiao Xueguang, et al. Coated and tapered fiber transmission characteristics based on temperature variation[J]. Chinese J Lasers, 2012, 39(3): 0305001.

[13] [13] Coviello G, Finazzi V, Villatoro J, et al. Thermally stabilized PCF-based sensor for temperature measurements up to 1000 ℃[J]. Optics Express, 2009, 17(24): 21551-21559.

[14] [14] Xu Y P, Lu P, Qin Z G, et al. Vibration sensing using a tapered bend-insensitive fiber based Mach-Zehnder interferometer[J]. Optics Express, 2013, 21(3): 3031-3042.

[15] [15] Xu B, Li J Q, Pan Y Y, et al. Temperature-insensitive fiber cantilever vibration sensor based on a fiber-to-fiber structure[J]. Chinese Optics Letters, 2014, 12(2): 020604.

[16] [16] Han Ping, Xie Yongquan, Liu Yang. Research of all-fiber micro-vibration multiplexing sensors[J]. Chinese J Lasers, 2014, 41(3): 0305004.

[17] [17] Saffari P, Allsop T, Adebayo A, et al. Long period grating in multicore optical fiber: an ultra-sensitive vector bending sensor for low curvatures[J]. Optics Letters, 2014, 39(12): 3508-3511.

[18] [18] Smietana M, Brabant D, Bock W J, et al. Refractive-index sensing with inline core-cladding intermodal interferometer based on silicon nitride nano-coated photonic crystal fiber[J]. Journal of Lightwave Technology, 2012, 30(8): 1185-1189.

[19] [19] Hou Jianping, Ning Tao, Gai Shuanglong, et al. Sensitivity analysis of refractive index measurement based on intermodal interference in photonic crystal fiber[J]. Acta Physica Sinica, 2010, 59(7): 4732-4737.

[20] [20] Dobb H, Kalli K, Webb D J. Temperature insensitive long period grating sensors in photonic crystal fiber[C]. SPIE, 2004, 5579: 66-79.

[21] [21] Mu Zhiyong. Research on sensing characteristics of modal interferometer instrument based on fiber grating[J]. Optical Communication Technology, 2014, 38(7): 32-35.

[22] [22] Liu Feng, Bi Weihong, Guo Xuan. Research on modular interference of elliptical-core polarization maintenance fiber[J]. Journal of Optoelectronics·Laser, 2008, 19(8): 1019-1022.

[23] [23] Liu Y, Wei L. Low-cost high-sensitivity strain and temperature sensing using graded-index multimode fibers[J]. Applied Optics, 2007, 46(13): 2516-2519.

[24] [24] Gong Y, Guo Y, Rao Y J, et al. Fiber-optic Fabry-Pérot sensor based on periodic focusing effect of graded-index multimode fibers[J]. IEEE Photonics Technology Letters, 2010, 22(23): 1708-1710.

[25] [25] Tafulo P A R, Jorge P A S, Santos J L, et al. Intrinsic Fabry-Pérot cavity sensor based on etched multimode graded index fiber for strain and temperature measurement[J]. IEEE Sensors Journal, 2012, 12(1): 8-12.

[26] [26] Zhao Na, Fu Haiwei, Shao Min, et al. Research on high sensitivity temperature sensor based on Mach-Zehnder interferometer with waist-enlarged fiber bitapers[J]. Spectroscopy and Spectral Analysis, 2014, 34(6): 1722-1726.

[27] [27] Huang Zejia, Li Qiang, Xu Yaqin, et al. Research on temperature sensing characteristics based on modular interference of single-mode-multimode-single-mode fiber[J]. Chinese J Lasers, 2013, 40(6): 0605001.

[28] [28] Fu Haiwei, Yan Xu, Shao Min, et al. Optical fiber core-mismatched Mach-Zehnder refractive sensor[J]. Optics and Precision Engineering, 2014, 22(9): 2285-2291.

[29] [29] Fu Xinghu, Xie Haiyang, Zhu Hongbin, et al. Experimental research of curvature sensor based on tapered photonic crystal fiber Mach-Zehnder interferometer[J]. Acta Optica Sinica, 2015, 35(5): 0506002.

[30] [30] Fu Haiwei, Yan Xu, Li Huidong, et al. Study of fiber sensor for simultaneous measurement of refractive and temperature based on a core-mismatch Mach-Zehnder interferometer[J]. Acta Optica Sinica, 2014, 34(11): 1106001.

[31] [31] Chen D, Hu G F, Chen L X. Pressure/temperature sensor based on a dual-core photonic crystal fiber[C]. Communications and Photonics Conference and Exhibition, 2011: 12784366.

[32] [32] Yang S, Sun H, Yuan L T, et al. Refractive index and temperature sensor based on cladding-mode Bragg grating excited by abrupt taper interferometer[J]. Chinese Optics Letters, 2013, 11(12): 120604.