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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 4 — Feb. 13, 2012
  • pp: 4663–4674

Piston and tilt cophasing of segmented laser array using Shack-Hartmann sensor

Xiaohua Wang, Qiang Fu, Feng Shen, and Changhui Rao  »View Author Affiliations


Optics Express, Vol. 20, Issue 4, pp. 4663-4674 (2012)
http://dx.doi.org/10.1364/OE.20.004663


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Abstract

We describe a concept of detecting the piston and tilt errors with a Shack-Hartmann sensor and correcting them simultaneously via a segmented deformable mirror (DM) in a two-dimensional laser array. The concept in coherent beam combination (CBC) is demonstrated by both simulation and experiment. The simulative results show only two iterations are enough to correct the random initial phase errors in the steady condition. The experimental results confirm that this method works effectively in a dynamic condition. The study represents that the Shack-Hartmann sensor can extract any piston error in –π ~π, which means the concept is an arbitrary phasing technique for a laser array.

© 2012 OSA

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.7350) Atmospheric and oceanic optics : Wave-front sensing
(140.3290) Lasers and laser optics : Laser arrays
(140.3298) Lasers and laser optics : Laser beam combining

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: December 15, 2011
Revised Manuscript: February 2, 2012
Manuscript Accepted: February 3, 2012
Published: February 9, 2012

Virtual Issues
March 19, 2012 Spotlight on Optics

Citation
Xiaohua Wang, Qiang Fu, Feng Shen, and Changhui Rao, "Piston and tilt cophasing of segmented laser array using Shack-Hartmann sensor," Opt. Express 20, 4663-4674 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-4-4663


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