[1] [1] ZHANG Ying, ZHAO Jun-xue, WU Jun, et al. Bendind characteristics analysis of eccentric core optical fiber ［J］. Acta Photonica Sinica, 2017, 46(3): 0306002.

[2] [2] PAKDEEVANICH P. Optical fiber sensor based on a polymer optical fiber macro-bend to study thermal expansion of metals［J］. Journal of Physics: Conference Series, 2018, 1027(1): 012007.

[3] [3] ZHAO J, BAO T, KUNDU T. Widerange fiber displacement sensor based on bending loss［J］. Journal of Sensors, 2016, 2016: 1-5.

[4] [4] TANG Jie-yuan, ZHANG Quan-quan, ZENG Yang-fu, et al. Optical fiber measurement system for thickness of water film［J］. Acta Photonica Sinica, 2015, 44(5): 88-93.

[5] [5] LEAL-JUNIOR A, FRIZERA A, PONTES M J, et al. Dynamic mechanical characterization with respect to temperature, humidity, frequency and strain in mPOFs made of different materials［J］. Optical Materials Express, 2018, 8(4): 804-815.

[6] [6] CHENG Lin, LI Ya-ming, MA Yu-ming, et al. The sensing principle of a new type of crack sensor based on linear macro-bending loss of an optical fiber and its experimental investigation［J］. Sensors and Actuators A, 2018, 272: 53-61.

[7] [7] NAM S H, YIN S Z. High-temperature sensing using whispering gallery mode resonance in bent optical fiber［J］. Photonics Technology Letters, 2005, 17(11): 2391-2393.

[8] [8] KUMAR S, SWAMINATHAN S. Design of liquid temperature sensor based on bending loss phenomenon of plastic optic fiber and electro-optic effect of Mach-Zehnder interferometer［C］.Optical Sensing and Detection IV, International Society for Optics and Photonics, 2016, 9899: 98991Z.

[9] [9] GONG Zhen-feng, CHEN Ke, ZHOU Xin-lei, et al. Temperature-compensated refractive index sensor based on bent-fiber interference［J］. Optical Fiber Technology, 2017, 36: 6-9.

[10] [10] RAIKARU S, LALASANGI A S, KULKAMI V K, et al. Temperature dependence of bending loss in single mode communication fiber: Effect of fiber buffer coating［J］. Optics Communications, 2007, 273(2): 402-406.

[11] [11] KWANG-TAEK K, JI-HOON K, KYU-JUNG C,et al. Fiber-optic temperature sensor based on bending loss of thermally expanded core fiber［J］. Korean Journal of Optics and Photonics, 2010, 21(1): 12-15.

[12] [12] MORALEDA A T, GARCIA C V, ZABALLA J Z, et al. A temperature sensor based on a polymer optical fiber macro-bend［J］. Sensors, 2013, 13(10): 13076-13089.

[13] [13] CHEN Tao, XIE Zhong, LI Zhi-hong, et al. Study on the monotonicity of bending loss of polymer optical fiber［J］. Journal of Lightwave Technology, 2015, 33(10): 2032-2037.

[14] [14] LEAL-JUNIOR A, FRIZERA A, MARQUES C, et al. Polymer-optical-fiber-based sensor system for simultaneous measurement of angle and temperature［J］. Applied Optics, 2018, 57(7): 1717-1723.

[15] [15] TAPETADO A, PINZON P J, ZUBIA J, et al. Polymer optical fiber temperature sensor with dual-wavelength compensation of power fluctuations［J］. Journal of Lightwave Technology, 2015, 33( 13): 2716-2723.

[16] [16] RAJAN G, MATHEW J, SEMENOVA Y, et al. Evaluation of the performance of a novel low-cost macro-bend fiber-based temperature sensor［C］. Fiber Optic Sensors and Applications UI, the International Society for Optical Engineering, 2009, 7316: 731610.

[17] [17] RAJAN G, SEMENOVA Y, MATHEW J, et al. Experimental analysis and demonstration of a low cost fibre optic temperature sensor system for engineering applications［J］. Sensors and Actuators A, 2010, 163(1): 88-95.

[18] [18] MARCUSE D. Curvature loss formula for optical fibers［J］. Journal of the Optical Society of America, 1976, (3): 216-220.

[19] [19] WANG Q, FARRELL G, FREIR T. Theoretical and experimental investigations of macro-bend losses for standard single mode fibers［J］. Optics Express, 2005, 13(12): 4476-4484.

[20] [20] YE C, KOPONEN J, AALLOS V,et al. On the measurement of fundamental mode bend loss in large-mode-area optical fibers［J］. Applied Optics, 2017, 56(4): 928-934.

[21] [21] FROSZ M H, ROTH P, GNENDI M C, et al. Analytical formulation for the bend loss in single-ring hollow-core photonic crystal fibers［J］. Photonics Research, 2017, 5(2): 88-91.

[22] [22] WANG P,RAJAN G, SEMENOVA Y, et al. Temperature dependence of a macrobending edge filter based on a high-bend loss fiber［J］. Optics Letters, 2008, 33(21): 2470-2472.

[23] [23] LI Yu-long, ZHANG Hua, FENG Yan, et al. Metal coating of fiber Bragg grating and the temperature sensing character after metallization［J］. Optical Fiber Technology, 2009, 15(4): 391-397.

[24] [24] PENG Xing-ling, ZHANG Hua, LI Yu-long. Thermal stress and the associated photoelastic effect of the metal coated fiber loop［J］. Acta Optica Sinica, 2014, 34 (11): 1106004.