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Optical Communications Using Light Beams Carrying Orbital Angular Momentum

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We described recent progress on optical communications using light beams carrying orbital angular momentum (OAM). We achieved a 25.6-bit/s/Hz spectral efficiency using 16-QAM signals over pol-muxed four OAM beams. We obtained a 2-Tbit/s data link using 25-WDM-channel 40-Gbit/s NRZ-DPSK signals over two OAM beams.

© 2012 Optical Society of America

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