Abstract

In this paper we combine the master-oscillator power fiber amplifier (MOPFA), active phase-compensation, and beam-tilting techniques to demonstrate high fill factor coherent beam combining. First, we optimize a single-frequency, linearly polarized MOPFA system with high scalability and flexibility based on compact, high efficiency Yb-doped fiber amplifier chains. Second, we demonstrate high fill factor coherent beam combining of these MOPFA arrays at a 50 W level in the far field successfully. Last, the interference matrix of eight element arrays under an opened loop condition is investigated. Scaling the system to higher power can be expected by increasing the power per fiber chain and adding the number of laser channels.

© 2009 Optical Society of America

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History
Original Manuscript: June 29, 2009
Manuscript Accepted: September 16, 2009
Revised Manuscript: September 13, 2009
Published: October 2, 2009

References

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Author Affiliations

Yunfeng Qi, Chi Liu, Jun Zhou, Qihong Lou, Weibiao Chen, Jingxing Dong, Yunrong Wei

Shanghai Institute of Optics and Fine Mechanics

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