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Experimental Demonstration of Free-Space Optical Communications Using OFDM-QPSK/16QAM-Carrying Fractional Orbital Angular Momentum (OAM) Multiplexing

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Abstract

We report free-space optical communications exploiting fractional orbital angular momentum (OAM) multiplexing. Using OFDM-QPSK/16QAM signals over fractional OAM beams with varied channel spacing, fractional OAM communications are demonstrated in the experiment even with a small OAM channel spacing of 0.6.

© 2015 Optical Society of America

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