We demonstrate the operation of a low threshold femtosecond Yb:KYW laser, using a saturable absorber mirror for passive mode-locking and a high brightness laser diode as pumping source. Fourier-limited pulses with a duration of 101 fs are achieved at an output power of 100 mW. The performance of the Yb:KYW laser was also compared to that of Yb:KGW.
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Klopp et al. (2002) studied this question.