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Fiber amplification of pulse bursts up to 20 μJ pulse energy at 1 kHz repetition rate

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Abstract

We demonstrate burst-mode operation of a polarization-maintaining Yb-doped fiber amplifier. Groups of pulses with a temporal spacing of 10ns and 1kHz overall repetition rate are amplified to an average pulse energy of 20μJ and total burst energy of 0.25mJ. The pulses are externally compressed to 400fs. The amplifier is synchronously pulsed–pumped to minimize amplified spontaneous emission between the bursts. We characterize the influence of pump pulse duration, pump-to-signal delay, and signal burst length.

© 2011 Optical Society of America

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