Near-perfect sorting of orbital angular momentum and angular position states of light

Malcolm N. O'Sullivan; Mohammad Mirhosseini; Mehul Malik; Robert W. Boyd

doi:10.1364/OE.20.024444

Near-perfect sorting of orbital angular momentum and angular position states of light

Malcolm N. O'Sullivan^*
, Mohammad Mirhosseini
, Mehul Malik
, Robert W. Boyd

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

120 Citations (Scopus)

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.

Original language	English
Pages (from-to)	24444-24449
Number of pages	6
Journal	Optics Express
Volume	20
Issue number	22
DOIs	https://doi.org/10.1364/OE.20.024444
Publication status	Published - 22 Oct 2012

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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AU - O'Sullivan, Malcolm N.

AU - Mirhosseini, Mohammad

AU - Malik, Mehul

AU - Boyd, Robert W.

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Y1 - 2012/10/22

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/84868259946

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Near-perfect sorting of orbital angular momentum and angular position states of light

Abstract

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