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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 26 — Dec. 20, 2010
  • pp: 26946–26958

Generation of dark hollow beam via coherent combination based on adaptive optics

Yi Zheng, Xiaohua Wang, Feng Shen, and Xinyang Li  »View Author Affiliations

Optics Express, Vol. 18, Issue 26, pp. 26946-26958 (2010)

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A novel method for generating a dark hollow beam (DHB) is proposed and studied both theoretically and experimentally. A coherent combination technique for laser arrays is implemented based on adaptive optics (AO). A beam arraying structure and an active segmented mirror are designed and described. Piston errors are extracted by a zero-order interference detection system with the help of a custom-made photo-detectors array. An algorithm called the extremum approach is adopted to calculate feedback control signals. A dynamic piston error is imported by LiNbO3 to test the capability of the AO servo. In a closed loop the stable and clear DHB is obtained. The experimental results confirm the feasibility of the concept.

© 2010 OSA

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3290) Lasers and laser optics : Laser arrays
(140.3298) Lasers and laser optics : Laser beam combining

ToC Category:
Adaptive Optics

Original Manuscript: August 17, 2010
Revised Manuscript: October 16, 2010
Manuscript Accepted: November 2, 2010
Published: December 8, 2010

Yi Zheng, Xiaohua Wang, Feng Shen, and Xinyang Li, "Generation of dark hollow beam via coherent combination based on adaptive optics," Opt. Express 18, 26946-26958 (2010)

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