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Opt Lett. 2007 Jul 15;32(14):1962-4.

Continuous-wave and femtosecond laser operation of Yb:CaGdAlO4 under high-power diode pumping.

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  • 1Laboratoire Charles Fabry de I'Institut d'Optique, CNRS, Univ Paris-Sud, Campus Polytechnique, 91127 Palaiseau Cedex, France.


We demonstrate the generation of 68 fs secant hyperbolic pulses at a 105 MHz repetition rate with an average power of 520 mW from a diode-pumped Yb(3+):CaGdAlO(4) mode-locked laser. A semiconductor saturable absorber allows passive mode locking, and a 15 W diode laser is used to pump directly the crystal. To our knowledge this represents the highest average power ever obtained for a sub-100 fs diode-pumped Yb-bulk laser.

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