Abstract

We report a high-power all-fiber format pulsed laser source at $\sim 1064\mathrm{nm}$ in a master oscillator–power amplifier configuration. The seed source is an acousto-optic $Q$-switched fiber laser with a varied pulse duration and repetition rate. The output power of the oscillator is $\sim 1\mathrm{W}$, and two double-cladding Yb-doped fiber amplifiers were used to boost the average power of the seed. $>230\mathrm{W}$ average power was achieved for $\sim 1.4\mathrm{\mu s}$ pulses at 100 kHz repetition rate. The optical-to-optical efficiency of the main amplifier is 72.81%.

© 2013 Optical Society of America

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