Abstract

We demonstrate the generation of 68fs secant hyperbolic pulses at a 105MHz repetition rate with an average power of 520mW from a diode-pumped Yb3+:CaGdAlO4 mode-locked laser. A semiconductor saturable absorber allows passive mode locking, and a 15W diode laser is used to pump directly the crystal. To our knowledge this represents the highest average power ever obtained for a sub-100fs diode-pumped Yb-bulk laser.

© 2007 Optical Society of America

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