Abstract

Femtosecond mode-locked operation is demonstrated for the first time, to our knowledge, with a $\text{Yb}:{\text{SrF}}_2$ crystal. The shortest pulse duration is 143 fs for an average power of 450 mW. The highest average power is 620 mW for a pulse duration of 173 fs. Since $\text{Yb}:{\text{SrF}}_2$ corresponds to the longest-lifetime Yb-doped crystal with which the mode-locking operation has been achieved, a detailed analysis is carried out to characterize the quality of the solitonlike regime.

© 2009 Optical Society of America

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