We report a Cr2+:ZnSe face-cooled disk laser pumped by a 1.9 μm Tm fiber laser. Direct modulation of the fiber laser permitted operation of the Cr laser at repetition rates from true CW to 1 kHz, with slope efficiencies up to 28% and thresholds as low as 200 mW, performance comparable to the case of Q-switched pumping.

© 2005 Optical Society of America

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