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Compact demultiplexing of optical vortices by means of diffractive transformation optics
Author(s): G. Ruffato; M. Massari; F. Romanato
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Paper Abstract

Orbital angular momentum (OAM) states of light have been recently considered in new mode-division multiplexing techniques in order to increase the bandwidth of today’s optical networks. Many optical architectures have been presented and exploited in order to sort the different OAM channels. Here we present a diffractive version of the sorting technique based on log-pol optical transformation and we further improve the miniaturization level by integrating the two components into a single diffractive optical element. Samples have been fabricated with high-resolution electronbeam lithography and characterized in the optical range. The presented design is promising for integration into nextgeneration optical platforms performing optical processing of OAM modes, for applications both in free-space and optical fibers.

Paper Details

Date Published: 27 September 2016
PDF: 8 pages
Proc. SPIE 9950, Laser Beam Shaping XVII, 995003 (27 September 2016); doi: 10.1117/12.2237765
Show Author Affiliations
G. Ruffato, Univ. degli Studi di Padova (Italy)
Lab. for Nanofabrication of Nanodevices (Italy)
M. Massari, Univ. degli Studi di Padova (Italy)
Lab. for Nanofabrication of Nanodevices (Italy)
F. Romanato, Univ. degli Studi di Padova (Italy)
Lab. for Nanofabrication of Nanodevices (Italy)
CNR-INFM TASC IOM National Lab. (Italy)


Published in SPIE Proceedings Vol. 9950:
Laser Beam Shaping XVII
Andrew Forbes; Todd E. Lizotte, Editor(s)

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