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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 34, Iss. 19 — Oct. 1, 2009
  • pp: 2939–2941

Coherent beam combination of three two-tone fiber amplifiers using stochastic parallel gradient descent algorithm

Pu Zhou, Yanxing Ma, Xiaolin Wang, Haotong Ma, Xiaojun Xu, and Zejin Liu  »View Author Affiliations


Optics Letters, Vol. 34, Issue 19, pp. 2939-2941 (2009)
http://dx.doi.org/10.1364/OL.34.002939


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Abstract

Multitone radiation is a promising technique to mitigate stimulated Brillouin scattering effects in narrow-linewidth fiber amplifiers. We demonstrate coherent beam combination of three two-tone fiber amplifiers using a stochastic parallel gradient descent (SPGD) algorithm. Phase control on the fiber amplifiers are performed by running the SPGD algorithm on a digital signal processor. The contrast of far-field intensity pattern of a coherently combined beam is more than 85%. Experimental results validate that a single-frequency seed laser is not indispensable for coherent beam combination in master oscillator power amplifier configuration.

© 2009 Optical Society of America

OCIS Codes
(140.3290) Lasers and laser optics : Laser arrays
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.3298) Lasers and laser optics : Laser beam combining

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 30, 2009
Manuscript Accepted: August 18, 2009
Published: September 23, 2009

Citation
Pu Zhou, Yanxing Ma, Xiaolin Wang, Haotong Ma, Xiaojun Xu, and Zejin Liu, "Coherent beam combination of three two-tone fiber amplifiers using stochastic parallel gradient descent algorithm," Opt. Lett. 34, 2939-2941 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-19-2939


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