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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 3 — Feb. 1, 2013
  • pp: 326–328

Simultaneous adaptive control of dual deformable mirrors for full-field beam shaping with the improved stochastic parallel gradient descent algorithm

Haotong Ma, Zejin Liu, Xiaojun Xu, and Jinbao Chen  »View Author Affiliations


Optics Letters, Vol. 38, Issue 3, pp. 326-328 (2013)
http://dx.doi.org/10.1364/OL.38.000326


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Abstract

We propose and demonstrate the simultaneous adaptive control of a dual deformable mirror system for full-field beam shaping based on an improved stochastic parallel gradient descent (SPGD) algorithm and dual-phase-only liquid crystal spatial light modulators (LC-SLMs). One LC-SLM adaptively redistributes the intensity of the input beam and the other adaptively compensates the wavefront of the output beam. However, the intensity redistribution and wavefront compensation closed loops run simultaneously. In addition, the intensity redistribution and wavefront compensation closed loops adopt their respective metric functions independently. Experimental results show that the improved SPGD algorithm can not only be used for controlling dual deformable mirror configuration to adaptively generate near diffraction-limited flattop beams with desired intensity distributions, but also can greatly improve the control bandwidth.

© 2013 Optical Society of America

OCIS Codes
(140.3300) Lasers and laser optics : Laser beam shaping
(230.6120) Optical devices : Spatial light modulators
(220.1080) Optical design and fabrication : Active or adaptive optics

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: November 27, 2012
Revised Manuscript: December 20, 2012
Manuscript Accepted: December 26, 2012
Published: January 28, 2013

Citation
Haotong Ma, Zejin Liu, Xiaojun Xu, and Jinbao Chen, "Simultaneous adaptive control of dual deformable mirrors for full-field beam shaping with the improved stochastic parallel gradient descent algorithm," Opt. Lett. 38, 326-328 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-3-326


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