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736 W Average Power All-fiber Nanosecond MOPA Based on Ultra-low NA Ytterbium Doped Fiber

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We report an all-fiberized high average power pulsed fiber amplifier based on ultra-low NA step-index Yb-doped double-clad fiber. An output power of 736W with M2~1.35 is obtained, which corresponds to 64kW peak-power and 0.39mJ pulse-energy.

© 2015 Optical Society of America

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