Pulse energy of 151 nJ from ultrafast thulium-doped chirped-pulse fiber amplifier

Abstract

We report on chirped-pulse amplification of an ultrafast thulium-doped fiber laser. Pulses with an energy of $3.3\mathrm{nJ}$ and a bandwidth-limited pulse duration of $195\mathrm{fs}$ could be amplified to $151\mathrm{nJ}$, which corresponds to an average power of $5.7\mathrm{W}$ at $37.6\mathrm{MHz}$ pulse repetition rate. The maximum output power was limited by the available pump power. The pulses could be dechirped to a duration of $258\mathrm{fs}$.

© 2010 Optical Society of America

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