Spatially Multiplexed Orbital-Angular-Momentum-Encoded Single Photon and Classical Channels in a Free-Space Optical Communication Link
Y. Ren, C. Liu, K. Pang, J. Zhao, Y. Cao, G. Xie, L. Li, P. Liao, Z. Zhao, M. Tur, R. W. Boyd, and A. E. Willner, Opt. Lett. 42, 4881 (2017).
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