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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 22 — Oct. 22, 2012
  • pp: 24444–24449

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

Malcolm N. O’Sullivan, Mohammad Mirhosseini, Mehul Malik, and Robert W. Boyd  »View Author Affiliations

Optics Express, Vol. 20, Issue 22, pp. 24444-24449 (2012)

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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.

© 2012 OSA

OCIS Codes
(200.2605) Optics in computing : Free-space optical communication
(050.4865) Diffraction and gratings : Optical vortices
(060.5565) Fiber optics and optical communications : Quantum communications

ToC Category:
Physical Optics

Original Manuscript: August 14, 2012
Revised Manuscript: September 27, 2012
Manuscript Accepted: September 27, 2012
Published: October 11, 2012

Malcolm N. O’Sullivan, Mohammad Mirhosseini, Mehul Malik, and Robert W. Boyd, "Near-perfect sorting of orbital angular momentum and angular position states of light," Opt. Express 20, 24444-24449 (2012)

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