Compact demultiplexing of optical vortices by means of diffractive transformation optics

G. Ruffato; M. Massari; F. Romanato

doi:10.1117/12.2237765

27 September 2016 Compact demultiplexing of optical vortices by means of diffractive transformation optics

G. Ruffato, M. Massari, F. Romanato

Proceedings Volume 9950, Laser Beam Shaping XVII; 995003 (2016) https://doi.org/10.1117/12.2237765
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States

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.

Citation Download Citation

G. Ruffato, M. Massari, and F. Romanato "Compact demultiplexing of optical vortices by means of diffractive transformation optics", Proc. SPIE 9950, Laser Beam Shaping XVII, 995003 (27 September 2016); https://doi.org/10.1117/12.2237765

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