
Proceedings Paper
Efficient multiplexing and demultiplexing of orbital angular momentum beamsFormat | Member Price | Non-Member Price |
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Paper Abstract
In the near-field regime, the number of spatial modes that a free-space communication system can efficiently use
is given by the product of the Fresnel numbers of the transmit and receive apertures. It can be advantageous
to decompose the field into modes that have rotational symmetry or definite orbital angular momentum (OAM
modes). A key challenge to using OAM modes as parallel channels in a practical communication system is
efficient multiplexing of single-spatial-mode transmitters to the orthogonal OAM modes, and demultiplexing the
combined beam into single-spatial-mode receiver arrays. Previous approaches have utilized modes of different
OAM, but ignored the radial coordinate, leading to inefficient use of the Fresnel number. We identify a method,
using lenses and holographic phase plates, to efficiently and reversibly convert concentric Laguerre-Gauss OAM
beams into an array of separated Gaussian beams.
Paper Details
Date Published: 24 January 2012
PDF: 7 pages
Proc. SPIE 8284, Next-Generation Optical Communication: Components, Sub-Systems, and Systems, 828407 (24 January 2012); doi: 10.1117/12.909567
Published in SPIE Proceedings Vol. 8284:
Next-Generation Optical Communication: Components, Sub-Systems, and Systems
Guifang Li; Dieter Stefan Jäger, Editor(s)
PDF: 7 pages
Proc. SPIE 8284, Next-Generation Optical Communication: Components, Sub-Systems, and Systems, 828407 (24 January 2012); doi: 10.1117/12.909567
Show Author Affiliations
Kevin M. Birnbaum, Jet Propulsion Lab. (United States)
Baris I. Erkmen, Jet Propulsion Lab. (United States)
Published in SPIE Proceedings Vol. 8284:
Next-Generation Optical Communication: Components, Sub-Systems, and Systems
Guifang Li; Dieter Stefan Jäger, Editor(s)
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