5 February 2013 Performance analysis of spectrally efficient free-space data link using spatially multiplexed orbital angular momentum beams
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Abstract
In this paper, we present the measurement results of a spectrally efficient 2.56Tb/s free-space data link using orbital angular momentum (OAM) beams. This link includes 32 independent 20 Gbaud/s 16-quadrature-amplitude-modulation data streams, each encoded on a different OAM beam, which are mode-, polarization- and space-division multiplexed as one collocated beam. We measured the bit-error rate (BER) curves of all 32 channels, all of which can achieve a BER of <2×10-3. The performance degradation due to the spatial multiplexing using concentric ring scheme is analyzed. Additionally, the effect of the pre-filtering is investigated, and negligible penalty is observed.
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Hao Huang, Yongxiong Ren, Yan Yan, Yang Yue, Nisar Ahmed, Amanda Bozovich, Samuel J. Dolinar, Alan E. Willner, "Performance analysis of spectrally efficient free-space data link using spatially multiplexed orbital angular momentum beams", Proc. SPIE 8647, Next-Generation Optical Communication: Components, Sub-Systems, and Systems II, 864706 (5 February 2013); doi: 10.1117/12.2004886; https://doi.org/10.1117/12.2004886
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