[1] Wong E. Survivable architectures for time and wavelength division multiplexed passive optical networks[J]. Optics Communications, 325, 152-159(2014). http://www.sciencedirect.com/science/article/pii/S0030401814003150

[2] Han Yishi, Luo Zhixiao, Qin Xinyu et al. Frequency-selectable and multi-channel wavelength division multiplexing radio-over-fiber system[J]. Chinese J Lasers, 43, 0505007(2016).

[3] Yu Jun, Huang Mingliu, Zou Yaozhao et al. Phase noise cancellation for coherent optical OFDM system based on polarization diversity[J]. Acta Optica Sinica, 36, 0806001(2016).

[4] Xu Yunxiang, Xu Mengmeng, Sun Jianfeng et al. Integrated technology of communication and velocity measurement in satellite coherent optical communication[J]. Laser & Optoelectronics Progress, 53, 120603(2016).

[5] Li Chao, Zhao Jian, Wang Wei et al. 4×100 Gbit/s long-distance quasi-single-mode bi-directional transmission with few-mode fiber[J]. Chinese J Lasers, 44, 0206001(2017).

[6] Ercan B, Salazargil J R, Blandhawthorn J et al. Mode-selective photonic lanterns for space-division multiplexing[J]. Optics Express, 22, 1036-1044(2014). http://www.ncbi.nlm.nih.gov/pubmed/24515063

[7] Fang Yan, Hu Guijun, Gong Caili et al. Mode demultiplexing based on cascaded independent component analysis for mode division multiplexing system with high mode group delay[J]. Chinese J Lasers, 43, 0806001(2016).

[8] Ryf R, Fontaine N K, Chen H et al. 72-Tb/s transmission over 179-km all-fiber 6-mode span with two cladding pumped in-line amplifiers[C]. IEEE European Conference on Optical Communication, 15636220(2015).

[9] Esmaeelpour M, Ryf R, Fontaine N K et al. Transmission over 1050-km few-mode fiber based on bidirectional distributed Raman amplification[J]. Journal of Lightwave Technology, 34, 1864-1871(2016). http://www.opticsinfobase.org/abstract.cfm?uri=jlt-34-8-1864

[10] Hayashi T, Nagashima T, Yonezawa K et al. Six-mode 19-core fiber with 114 spatial modes for weakly-coupled mode-division-multiplexed transmission[J]. Journal of Lightwave Technology, 35, 748-754(2017). http://ieeexplore.ieee.org/document/7592447/

[11] Gasulla I. Kahn J M Performance of direct-detection mode-group-division multiplexing using fused fiber couplers[J]. Journal of Lightwave Technology, 33, 1748-1760(2015). http://www.opticsinfobase.org/jlt/abstract.cfm?uri=jlt-33-9-1748

[12] Lenglé K, Insou X, Jian P. 4×10 Gbit/s bidirectional transmission over 2 km of conventional graded-index OM1 multimode fiber using mode group division multiplexing[J]. Optics Express, 24, 28594-28605(2016). http://europepmc.org/abstract/MED/27958503

[13] Ren F, Li J H, Wu Z Y. et al. Three-mode mode-division-multiplexing passive optical network over 12-km low mode-crosstalk FMF using all-fiber mode MUX/DEMUX[J]. Optics Communications, 383, 525-530(2017). http://www.sciencedirect.com/science/article/pii/S0030401816308343

[14] Eznaveh Z S. Lopez J E A, Galmiche G L, et al. Few mode multicore photonic lantern multiplexer[C]. Optical Fiber Communications Conference, Tu3l, 5(2016).

[15] Velazquez-Benitez A M, Alvarado J C, Lopez-Galmiche G et al. . Six mode selective fiber optic spatial multiplexer[J]. Optics Letters, 40, 1663-1666(2015). http://www.ncbi.nlm.nih.gov/pubmed/25872042

[16] Yerolatsitis S, Gris-Sánchez I, Birks T A. Adiabatically-tapered fiber mode multiplexers[J]. Optics Express, 22, 608-617(2014). http://europepmc.org/abstract/med/24515021

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

[18] Han Y Y, Hu G J. A novel MUX/DEMUX based on few-mode FBG for mode division multiplexing system[J]. Optics Communications, 367, 161-166(2016). http://www.sciencedirect.com/science/article/pii/S0030401816300153