Near-Perfect Sorting of Orbital Angular Momentum and Angular Position States of Light
Quantum Physics
2012-11-30 v2 Optics
Abstract
We present a novel method for efficient sorting of photons prepared in states of orbital angular momentum (OAM) and angular position (ANG). A log-polar optical transform is used in combination with a holographic beam-splitting method to achieve better mode discrimination and reduced cross-talk than reported previously. Simulating this method for 7 modes, we have calculated an improved mutual information of 2.43 bits/photon and 2.29 bits/photon for OAM and ANG modes respectively. In addition, we present preliminary results from an experimental implementation of this technique. This method is expected to have important applications for high-dimensional quantum key distribution systems.
Keywords
Cite
@article{arxiv.1208.2891,
title = {Near-Perfect Sorting of Orbital Angular Momentum and Angular Position States of Light},
author = {Malcolm N. O'Sullivan and Mohammad Mirhosseini and Mehul Malik and Robert W. Boyd},
journal= {arXiv preprint arXiv:1208.2891},
year = {2012}
}