Abstract

We demonstrate the generation of 99fs pulses by a mode-locked laser oscillator built around a Yb:CaF2 crystal. An average power of 380mW for a 13nm bandwidth spectrum centered at 1053nm is obtained. The short-pulse operation is achieved thanks to a saturable absorber mirror and is stabilized by the Kerr lens effect. We investigated the limits of the stabilization process and observed a regime slowly oscillating between mode locking and Q switching.

© 2009 Optical Society of America

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