Test of mode-division multiplexing and demultiplexing in free-space with diffractive transformation optics

Abstract

In recent years, mode-division multiplexing (MDM) has been proposed as a promising solution in order to increase the information capacity of optical networks both in free-space and in optical fiber transmission. Here we present the design, fabrication and test of diffractive optical elements for mode-division multiplexing based on optical transformations in the visible range. Diffractive optics have been fabricated by means of 3D high-resolution electron beam lithography on polymethylmethacrylate resist layer spun over a glass substrate. The same optical sequence was exploited both for input-mode multiplexing and for mode sorting after free-space propagation. Their high miniaturization level and efficiency make these optical devices ideal for integration into next-generation platforms for mode-division (de)multiplexing in telecom applications.

4 pages, 1 extended references page, 6 figures. arXiv admin note: substantial text overlap with arXiv:1610.07443

References in corpus (5)

• Quantum Communication
• Efficient and mode selective spatial mode multiplexer based on Multi-Plane Light Conversion
• 4 X 20 Gbit/s mode division multiplexing over free space using vector modes and a q-plate mode (de)multiplexer
• Near-Perfect Sorting of Orbital Angular Momentum and Angular Position States of Light
• Compact sorting of optical vortices by means of diffractive transformation optics

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• A general framework for conformal transformations in electron optics
• Electrically-activated spin-controlled orbital angular momentum multiplexer
• Local discrimination of orbital angular momentum in entangled states