Abstract
The MOPA (Master Oscillator Power Amplifier) configuration is very useful to extend laser performance of passively Q-switched sub-nanosecond Nd:doped microlaser addressing applications like material processing or instrumentation. Recently the millijoule level with sub-nanosecond pulses at 10 kHz has been demonstrated, but with complex system [1]. Yb fiber amplifiers [2,3] provide more simplicity and higher efficiency but are limited to the MW peak-power due to non-linear effects. Bridging the gap between bulk crystals and glass fibers, single-crystal fibers (SCF) are long and thin rod where the pump is guided (like in fibers) and the signal is unguided (like in bulk materials) propagating with beam size much larger than in typical glass fibers. In this paper, we investigate the potential of SCF as amplifier for different short pulses seed sources.
© 2011 Optical Society of America
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