A pulsed-pump technique reduces inter-pulse ASE and increases the amplifier efficiency in a low-repetition rate Yb-doped fiber amplifier. A 10 dB improvement in the SNR and a 4 dB improvement of the amplifier efficiency are demonstrated at a repetition rate of 0.5 kHz relative to that of a cw pumped amplifier.

© 2006 Optical Society of America

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