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