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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 17 — Jun. 10, 2010
  • pp: 3245–3249

Beam shaping for uplink transmission of a relay mirror system

Huiyun Wu, Haichuan Zhao, Xiaojun Xu, Wuming Wu, Jinbao Chen, and Yijun Zhao  »View Author Affiliations


Applied Optics, Vol. 49, Issue 17, pp. 3245-3249 (2010)
http://dx.doi.org/10.1364/AO.49.003245


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Abstract

We establish the model of a two-Cassegrain-telescope system that is commonly used in a relay mirror system. With this model, uplink transmission of the relay mirror system is theoretically analyzed. We determined that uplink transmission with turbulence completely corrected is not an optimal mode. We improve power coupling efficiency of the two-Cassegrain-telescope system by optimizing the optical phase at the launching telescope by use of the stochastic parallel gradient descent algorithm. For a 10 km vertical uplink transmission, power coupling efficiencies of the system are 63.10%, 87.82%, and 97.80% corresponding to an open-loop mode, a closed-loop mode, and a closed-loop with optimization mode, respectively. For a 30 km vertical uplink transmission, power coupling efficiencies of the system are 22.35%, 82.66%, and 91.91%, corresponding to an open-loop mode, a closed-loop mode, and a closed-loop with optimization mode, respectively. The results show that power coupling efficiency of the two-Cassegrain-telescope system is significantly improved.

© 2010 Optical Society of America

OCIS Codes
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(010.3310) Atmospheric and oceanic optics : Laser beam transmission
(140.3300) Lasers and laser optics : Laser beam shaping

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: November 16, 2009
Revised Manuscript: April 14, 2010
Manuscript Accepted: May 10, 2010
Published: June 2, 2010

Citation
Huiyun Wu, Haichuan Zhao, Xiaojun Xu, Wuming Wu, Jinbao Chen, and Yijun Zhao, "Beam shaping for uplink transmission of a relay mirror system," Appl. Opt. 49, 3245-3249 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-17-3245


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