[1] Essiambre R, Kramer G, Winzer P J, et al. Capacity limits of optical fiber networks［J］. Journal of Lightwave Technology, 2010, 28(4): 662-701.

[2] Le Yansi, Wang Zhi, Li Qiang, et al. Research of three mode fiber multiplexers and demultiplexers［J］. Chinese J Lasers, 2016, 43(6): 0606004.

[3] Ryf R, Randel S, Gnauck A H, et al. Space-division multiplexing over 10 km of three-mode fiber using coherent 6×6 MIMO processing［C］. Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference, 2011: PDPB10.

[4] Doerr C R. Proposed architecture for MIMO optical demultiplexing using photonic integration［J］. IEEE Photonics Technology Letters, 2011, 23(21): 1573-1575.

[5] Fontaine N K, Doerr C R, Mestre M A, et al. Space-division multiplexing and all-optical MIMO demultiplexing using a photonic integrated circuit［C］. Optical Fiber Communication Conference, 2012: PDP5B.1.

[6] Bulow H. Optical-mode demultiplexing by optical MIMO filtering of spatial samples［J］. IEEE Photonic Technology Letters, 2012, 24(12): 1045-1047.

[7] Winzer P J, Foschini G J. MIMO capacities and outage probabilities in spatially multiplexed optical transport systems［J］. Optics Express, 2011, 19(17): 16680-16696.

[8] Ryf R, Fontaine N K, Essiambre R J. Spot-based mode couplers for mode-multiplexed transmission in few-mode fiber［J］. IEEE Photonics Technology Letters, 2012, 24(21): 1973-1976.

[9] Blau M, Marom D M. Optimization of spatial aperture-sampled mode multiplexer for a three-mode fiber［J］. IEEE Photonics Technology Letters, 2012, 24(23): 2101-2104.

[10] Taillaert D, Harold C, Borel P I, et al. A compact two-dimensional grating coupler used as a polarization splitter［J］. IEEE Photonics Technology Letters, 2003, 15(9): 1249-1251.

[11] Miller D A B. Self-configuring universal linear optical component［J］. Photonics Research, 2013, 1(1): 1-15.