[1] Zeng Q Z, Gao G X. Research about 400 G optical transmission technologies[J]. Journal of Microwaves, 32, 92-96(2016).

[2] Yu J, Zhang J, Dong Z. et al. Transmission of 8× 480-Gb/s super-Nyquist-filtering 9-QAM-like signal at 100 GHz-grid over 5000-km SMF-28 and twenty-five 100 GHz-grid ROADMs[J]. Optics Express, 21, 15686-15691(2013).

[3] Trowbridge S J. Ethernet and OTN-400 G and beyond. [C]∥2015 Optical Fiber Communications Conference and Exhibition (OFC), March 22-26, 2015, Los Angeles, USA. New York: IEEE, 1-18(2015).

[4] Sasaki M, Fujiwara M, Ishizuka H. et al. Field test of quantum key distribution in the Tokyo QKD Network[J]. Optics Express, 19, 10387-10409(2011). http://www.onacademic.com/detail/journal_1000035239936610_10dc.html

[5] Wang L J, Chen L K, Ju L et al. Experimental multiplexing of quantum key distribution with classical optical communication[J]. Applied Physics Letters, 106, 081108(2015). http://scitation.aip.org/content/aip/journal/apl/106/8/10.1063/1.4913483

[6] Deng J W. The emit technique of space optical communication based on WDM[D]. Changchun University of Science and Technology(2013).

[7] Liaw S K, Hsu K Y, Yeh J G. et al. Impacts of environmental factors to bi-directional 2×40 Gb/s WDM free-space optical communication[J]. Optics Communications, 396, 127-133(2017). http://www.sciencedirect.com/science/article/pii/S0030401817302262

[8] Wang X Y, Zhao N, Chen N. et al. Effects of atmospheric turbulence on the single-photon receiving efficiency and the performance of quantum channel with the modified approximate elliptic-beam model assumption[J]. Quantum Information Processing, 17, 14(2018). http://link.springer.com/10.1007/s11128-017-1780-y

[9] Gisin N, Ribordy G, Tittel W et al. Quantum cryptography[J]. Reviews of Modern Physics, 74, 145(2002).

[10] Ma J, Jiang Y J, Yu S Y. et al. Packet error rate analysis of OOK, DPIM and PPM modulation schemes for ground-to-satellite optical communications[J]. Optics Communications, 283, 237-242(2010). http://www.sciencedirect.com/science/article/pii/S003040180900964X

[11] Srinivasan M, Vilnrotter V[S. l. : s. n.]. Symbol-error probabilities for pulse-position modulation signaling with an avalanche photodiode receiver and Gaussian thermal noise The Telecommunications and Mission Operations Progress Report 42-134, 1-11(1998).

[12] Gagliardi R M, Karp S[M]. Optical telecommunications and applications(1998).