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Investigation on efficiency of non-collinear serial laser beam combination based on Brillouin amplification

Published online by Cambridge University Press:  08 December 2009

Y.L. Wang ,
Z.W. Lu ,
S.Y. Wang ,
Z.X. Zheng ,
W.M. He  and
D.Y. Lin
Y.L. Wang
Affiliation:
Institute of Opto-electronics, Harbin Institute of Technology, Harbin, China
Z.W. Lu*
Affiliation:
Institute of Opto-electronics, Harbin Institute of Technology, Harbin, China
S.Y. Wang
Affiliation:
Institute of Opto-electronics, Harbin Institute of Technology, Harbin, China
Z.X. Zheng
Affiliation:
Institute of Opto-electronics, Harbin Institute of Technology, Harbin, China
W.M. He
Affiliation:
Institute of Opto-electronics, Harbin Institute of Technology, Harbin, China
D.Y. Lin
Affiliation:
Institute of Opto-electronics, Harbin Institute of Technology, Harbin, China
*
Address correspondence and reprint requests to: Zhiwei Lu, Institute of Opto-Electronics, Harbin Institute of Technology, P. O. Box 3031, Harbin 150080, China. E-mail: zw_lu@sohu.com
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Abstract

A non-collinear laser beam combination based on Brillouin amplification is proposed. The influence of non-collinear Brillouin amplification on the combination efficiency is analyzed and discussed theoretically. It is shown that an efficiency of 80% can be achieved with the angle between the Stokes and the pump limited to a range of 10°. The theoretical prediction is tested in experiment of non-collinear amplification of one Stokes and one pump. A two-beam combination scheme is designed and a high combination efficiency of 80% is also obtained in this experiment. According to these results, a 20-beam combination scheme is designed to achieve 13.2-J output energy. A very simple construction for a multiple beams combination is designed.

Keywords

Beam combinationPhase conjugationStimulated Brillouin scattering
Type
Research Article
Information
Laser and Particle Beams , Volume 27 , Issue 4 , December 2009 , pp. 651 - 655
Copyright
Copyright © Cambridge University Press 2009

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