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High-capacity millimetre-wave communications with orbital angular momentum multiplexing.


ABSTRACT: One property of electromagnetic waves that has been recently explored is the ability to multiplex multiple beams, such that each beam has a unique helical phase front. The amount of phase front 'twisting' indicates the orbital angular momentum state number, and beams with different orbital angular momentum are orthogonal. Such orbital angular momentum based multiplexing can potentially increase the system capacity and spectral efficiency of millimetre-wave wireless communication links with a single aperture pair by transmitting multiple coaxial data streams. Here we demonstrate a 32-Gbit s(-1) millimetre-wave link over 2.5 metres with a spectral efficiency of ~16 bit s(-1) Hz(-1) using four independent orbital-angular momentum beams on each of two polarizations. All eight orbital angular momentum channels are recovered with bit-error rates below 3.8 × 10(-3). In addition, we demonstrate a millimetre-wave orbital angular momentum mode demultiplexer to demultiplex four orbital angular momentum channels with crosstalk less than -12.5 dB and show an 8-Gbit s(-1) link containing two orbital angular momentum beams on each of two polarizations.

SUBMITTER: Yan Y 

PROVIDER: S-EPMC4175588 | biostudies-literature | 2014 Sep

REPOSITORIES: biostudies-literature

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High-capacity millimetre-wave communications with orbital angular momentum multiplexing.

Yan Yan Y   Xie Guodong G   Lavery Martin P J MP   Huang Hao H   Ahmed Nisar N   Bao Changjing C   Ren Yongxiong Y   Cao Yinwen Y   Li Long L   Zhao Zhe Z   Molisch Andreas F AF   Tur Moshe M   Padgett Miles J MJ   Willner Alan E AE  

Nature communications 20140916


One property of electromagnetic waves that has been recently explored is the ability to multiplex multiple beams, such that each beam has a unique helical phase front. The amount of phase front 'twisting' indicates the orbital angular momentum state number, and beams with different orbital angular momentum are orthogonal. Such orbital angular momentum based multiplexing can potentially increase the system capacity and spectral efficiency of millimetre-wave wireless communication links with a sin  ...[more]

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