[1] GRATTAN K T V, SUN T. Fiber optic sensor technology: an overview ［J］. Sensors and Actuators A(Physical), 2000, 82(1/3): 40-61.
[2] ZHANG H L, WU Z F, SHUM P P, et al.. Fiber Bragg gratings in heterogeneous multicore fiber for directional bending sensing ［J］. Journal of Optics, 2016, 18(8): 085705.
[3] YANG K, HE J, LIAO C, et al.. Femtosecond laser inscription of fiber Bragg grating in twin-core few-mode fiber for directional bend sensing ［J］. Journal of Lightwave Technology, 2017, 35(21): 4670-4676.
[4] SUN G K, QU D M, YAN G, et al.. Bending deformation of optical fiber sensing and shape reconstruction of soft pneumatic driver ［J］. Opt. Precision Eng. , 2019, 27(5): 1052-1059.(in Chinese)
[5] HE Y L, ZHANG X, SUN G K, et.al.. Flexible curvature sensor based on composite substrate ［J］. Opt. Precision Eng., 2019, 27(6): 1270-1276. (in Chinese)
[6] WANG Q, LIU Y. Optical fiber curvature sensor based on MMF-SCF-MMF structur ［J］. Optical Fiber Technology, 2018, 43(10): 1-5.
[7] DANISCH L A. Bend enhanced fiber optic sensors ［J］. SPIE, 1993, 1795: 204-214.
[8] DANISCH L A. Fiber optic bending and positioning sensor including a light emission surface formed on a portion of a light guide, United States ［P］. 5321257, 1994-6-14.
[9] SHEN Y P. Research on the Key Technology of Curvature Fiber Optic Sensor ［D］.Beijing: Beijing Jiaotong University, 2019. (in Chinese)
[10] DI H T, LI Y T, LIU K Y, et al.. Hand gesture monitoring using fiber-optic curvature sensors ［J］. Applied Optics, 2019, 58(29): 7935-7942.
[11] FLORENTIN R, KERMENE V, BENOIST J, et al.. Shaping the light amplified in a multimode fiber ［J］. Light: Science & Applications, 2016, 6(2): e16208.
[12] YI L C, Y BENGIO, G. HINTON. Deep learning ［J］. Nature, 2015, 521(7553): 436-444.
[13] SCHMIDHUBER J. Deep learning in neural networks: An overview ［J］. Neural Networks, 2015, 61: 85-117.
[14] KRIZHEVSKY A, SUTSKEVER I, HINTON G.E. Image Net classification with deep convolutional neural networks［C］. International Conference on Neural Information Processing Systems. NY USA: Advances in neural information processing systems, 2012: 1097-1105.
[15] WANG P, DI J.Deep learning-based object classification through multimode fiber via a CNN-architecture SpeckleNet ［J］. Applied Optics, 2018, 57(28): 8258-8263.
[16] BOTHANI N, KAKKAVA E, CHRISTOPHE M, et al.. Learning to see through multimode fibers ［J］. Optical, 2018, 5(8): 960-966.
[17] DI H T, SUN S, YU J, et al.. Novel optical fiber sensor for deformation measurement ［C］.5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment. Washington: Proceeding of SPIE, 2010: 7656, 76561C-1-76561C-7.
