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Opt Lett. 2009 May 1;34(9):1474-6.

Diode-pumped 99 fs Yb:CaF2 oscillator.

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  • 1Laboratoire Charles Fabry de l'Institut d'Optique, CNRS, Universit√© Paris-Sud, RD 128 91127 Palaiseau, France.


We demonstrate the generation of 99 fs pulses by a mode-locked laser oscillator built around a Yb:CaF(2) crystal. An average power of 380 mW for a 13 nm bandwidth spectrum centered at 1053 nm 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.

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