[1] [1] Chen Qiaoshan, Yang Lin. Optical routers for photonic networks-on-chip[J]. Laser & Optoelectronics Progress, 2014, 51(11): 110005.

[2] [2] S C Nicholes, M Mashanovitch, B Jevremovié, et al.. 8-channel InP monolithic tunable optical router for packet forwarding[C]. IEEE National Fiber Optic Engineers Conference on Optical Fiber Communication Conference and Exposition, 2011: 1-3.

[3] [3] C Dragone. An N×N optical multiplexer using a planar arrangement of two star couplers[J]. IEEE Photonics Technology Letters, 1991, 3(9): 812-815.

[4] [4] J Wang, Z Sheng, L Li, et al.. Low-loss and low-crosstalk 8×8 silicon nanowire AWG routers fabricated with CMOS technology[J]. Optics Express, 2014, 22(8): 9395-9403.

[5] [5] G Mu, P Huang, L Wu, et al.. Facet-rotated echelle grating for cyclic wavelength router with uniform loss and flat passband[J]. Opt Lett, 2015, 40(17): 3978-3981.

[6] [6] K Takiguchi, K Okamoto, A Sugita. Arrayed-waveguide grating with uniform loss properties over the entire range of wavelength channels[J]. Opt Lett, 2006, 31(4): 459-461.

[7] [7] Y Sakamaki, S Kamei, T Hashimoto, et al.. Loss uniformity improvement of arrayed-waveguide grating with mode-field converters designed by wavefront matching method[J]. Journal of Lightwave Technology, 2009, 27(24): 5710-5715.

[8] [8] J C Chen, C Dragone. Waveguide grating routers with greater channel uniformity[J]. Electronics Letters, 1997, 33(23): 1951-1952.

[9] [9] H C Lu, W S Wang. Cyclic arrayed waveguide grating devices with flat-top passband and uniform spectral response[J]. IEEE Photonics Technology Letters, 2008, 20(1) : 3-5.

[10] [10] Song Jun, He Sailing, Shi Zhimin. Optimal design for an etched diffraction grating for obtaining a flat-top spectral response[J]. Acta Photonica Sinica, 2003, 32(5): 550-554.

[11] [11] Sheng Zhongyan, He Sailing, He Jianjun. 1-Stigma and 2-Stigma method for the design of etched diffraction grating[J]. Journal of Optoelectronics·Laser, 2001, 12(7): 671-674.

[12] [12] Sheng Zhongyan, Lou Lifang, He Sailing, et al.. Simulation for an etched diffraction grating (EDG) of wide angle[J]. Acta Photonica Sinica, 2003, 32(5): 546-549.