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Average power of 1.1 kW from spectrally combined, fiber-amplified, nanosecond-pulsed sources

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Abstract

We report on spectral combination of four high repetition rate 5ns pulsed Yb-doped fiber amplifiers at 1μm wavelength. The output beam is spatially and temporally superposed by use of an all-reflective diffraction grating. 1.1kW average power and 220μJ pulse energy were extracted with a combining efficiency of 99%.

© 2009 Optical Society of America

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