Abstract

Resonantly pumped Er3+:Sc2O3 laser operation is achieved with a quantum defect (QD) of 1.5% at liquid nitrogen temperature. The laser, in-line pumped at 1535nm, operated at 1558nm with a slope efficiency of over 45%. This is believed to be the lowest QD eye-safe laser ever reported. CW output of over 3.3W was obtained in this first experiment.

© 2008 Optical Society of America

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