[1] YANG Yong-jia, ZHOU Zi-gang, SUN Guang-chun, et al. Asymmetric Y-branch waveguide with a rectangular transitional section ［J］. Optics ＆ Optoeletronic Technology, 2010, 8(2): 70-72.

[2] WANG Qian, HE Sai-ling, WANG Li-rong. A low-loss Y-branch with a multimode waveguide transition section ［J］. IEEE Photonics Technology Letters, 2002, 14(8): 1124-1126.

[3] CHEN Bao-xue, Yuan Yi-fang, JI Shou. New type low loss SiO2 Y-branch waveguide ［J］. Acta Optica Sinica, 2001, 21(5): 552-527.

[4] TONG Xi-zhou, ZHOU Jun, ZHENG Hui-ru, et al. Optimized design of a low-loss 1×3 optical splitter ［J］. Journal of Optoelectronics·Laser, 2007, 18(8): 927-930.

[5] ZHOU Jun, ZHAO Feng, GAO Yong-feng, et al. 3-D design and simulation of a new type of 1×N MMI power splitter ［J］. Acta Photonica Sinica, 2007, 36(11): 2037-2040.

[6] CHANG Wen-ching, LIN Han-bin. A novel low-loss wide- angle Y-branch with a diamond-like microprism ［J］. IEEE Photonics Technology Letters, 1999, 11(6): 683-685.

[7] HSU Jui-ming, LEE Ching-ting. Design of microprism-type symmetric Y-junction waveguides with the full phase compensation method ［J］. Applied Optics, 1999, 38(15): 3234-3238.

[8] LIN Han-bin. A very low-loss wide-angle Y-branch with a composite diamond-like microprism［J］. IEEE Journal of Quantum Electronics, 2001, 37(2): 231-236.

[9] CHUNG K K, CHAN H P, CHU P L. A 1×4 polarization and wavelength independent optical power splitter based on a novel wide-angle low-loss Y-junction ［J］. Optics Communications, 2006, 267(2): 367-372.

[10] HUANG Zhe, CHAN Hau-ping, UDDIN M A. Low-loss ultra compact optical power splitter using a multistep structure ［J］. Applied Optics, 2010, 49(10): 1900-1908.

[11] KLEKAMP A, KERSTEN P, REHMG W. An improved single-mode Y-branch design for cascaded 1∶2 splitters ［J］. Journal of Lightwave Technolog, 1996, 14(12): 2684-2686.

[12] YANG Jian-yi, WANG Ming-hua. Optimizing design to optical waveguide bend structure ［J］. Journal of Optoelectronics Laser, 1999, 10(4): 305-309.