Numerical Analysis of Orbital Angular Momentum based Next Generation Optical SDM Communications system
Objective
A QPSK carrying OAM beams through the different blocks of the transmission chain derived here (OAM encoder, multiplexing and de-multiplexing) and overall performance is seen in terms of SNR and bit error rate (BER).
Abstract
An analysis of both theoretical and numerical for an ideal channel Orbital Angular Momentum (OAM) transmission chain is presented in this paper. A theoretical OAM encoder which is also called Vortex Generator is defined, In general, this is analogous to Spiral phase Pattern which changes a flat Gaussian phase front into a helix. We concentrate on the OAM encoder, multiplexing, and de-multiplexing as the three key components of an optical communication system based on orbital angular momentum. The next step is to multiplex various OAM channels, all modulated with QPSK data, and decode certain modes to evaluate overall performance in terms of SNR and bit error rate. (BER).
Keywords: Orbital angular momentum (OAM), OAM beam, vortex generator, theoretical OAM encoder.
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