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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 1 — Jan. 2, 2012
  • pp: 452–461

Aberration corrections for free-space optical communications in atmosphere turbulence using orbital angular momentum states

S. M. Zhao, J. Leach, L. Y. Gong, J. Ding, and B. Y. Zheng  »View Author Affiliations

Optics Express, Vol. 20, Issue 1, pp. 452-461 (2012)

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The effect of atmosphere turbulence on light’s spatial structure compromises the information capacity of photons carrying the Orbital Angular Momentum (OAM) in free-space optical (FSO) communications. In this paper, we study two aberration correction methods to mitigate this effect. The first one is the Shack-Hartmann wavefront correction method, which is based on the Zernike polynomials, and the second is a phase correction method specific to OAM states. Our numerical results show that the phase correction method for OAM states outperforms the Shark-Hartmann wavefront correction method, although both methods improve significantly purity of a single OAM state and the channel capacities of FSO communication link. At the same time, our experimental results show that the values of participation functions go down at the phase correction method for OAM states, i.e., the correction method ameliorates effectively the bad effect of atmosphere turbulence.

© 2011 OSA

OCIS Codes
(010.1285) Atmospheric and oceanic optics : Atmospheric correction
(060.2605) Fiber optics and optical communications : Free-space optical communication
(070.6120) Fourier optics and signal processing : Spatial light modulators

ToC Category:
Atmospheric and Oceanic Optics

Original Manuscript: September 7, 2011
Revised Manuscript: November 19, 2011
Manuscript Accepted: December 1, 2011
Published: December 21, 2011

S. M. Zhao, J. Leach, L. Y. Gong, J. Ding, and B. Y. Zheng, "Aberration corrections for free-space optical communications in atmosphere turbulence using orbital angular momentum states," Opt. Express 20, 452-461 (2012)

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