[1] SUN Guang-chun, ZHOU Zi-gang, WANG Qiang, et al. The research and production of low bending loss waveguide［J］. China Science and Technology Information, 2010, (8): 48-51.

[2] GUI Li, XU Bao-xi, WU Dong-jiang, et al. Refractive index change in lithium niobate induced by focused femtosecond laser［J］. Photonics West, 2004: 24-29.

[3] ZHANG Shuang-geng, YAO Jiang-hong, FAN Ya-xian, et al. Second harmonic generation in periodically poled lithium niobate waveguide using femtosecond laser pulses［J］. Applied Physics Letters, 2008, 8(17): 7135-7139.

[4] CHEN Hong-yun. Fabrication and Characterization of waveguides in LiNbO3 written with femtosecond laser pulses［C］. Proceedings of 2010 International Conference on Display and Photonics, 2010, 120-122.

[5] LUO Chen, ZHU Li, ZHOU Zi-gang. Fabrication and investigation of optical waveguide in LiNbO3 by femtosecond laser［J］. Acta Photonica Sinica, 2011, 40(12): 1799-1802.

[6] ZHOU Guang-yong, GU Min. Fabrication of 3D photonic crystals in lithium niobate by use of femtosecond laser-induced microexplosion［C］. Optical Society of America, 2006, 1-2.

[7] GRANDO D, YU J, BALLARINI D, et al. Femtosecond laser writing of surface microstructures in lithium niobate［C］. Nonlinear Guided Waves and Their Applications (NLGW), 2005, WD33.

[8] SATOSHI A, SATORU S, JUNJI H. Transient optical absorption upon femtosecond pulse irradiation in lithium niobate crystals［J］ .Nonlinear Frequency Generation and Conversion, 2009, 7197121-8.

[9] ZHANG Xiao-kang, LIAO Chang-jun, LIU Song-hao. The relationship of the radius to the loss in bending waveguide［J］. Acta Photonica Sinica, 2004, 33(2): 147-150.

[10] XU Jian-feng, BO Zhong-yang, BAI Jian, et al. Research of bent waveguide optimization［J］. Journal of Optoelectronics·Laser, 2006, 17(9): 1078-1081.