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Direct measurement of upper laser level population dynamics in a laser-diode side-pumped Ho:Tm:YLiF4 2μm laser

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Abstract

A pump-probe setup capable of directly measuring the upper laser level population dynamics of the 5I75I8 laser transition is developed taking advantage of the strong ground-state depletion. This pump-probe experiment first is used to investigate the spatial distribution of the pump intensity in a laser-diode side-pumped laser crystal, then to determine the main energy transfers involved in Ho:Tm systems and also to estimate the intrinsic optical losses of the laser crystal. Finally, using the results of this pumpprobe experiment we were able to precisely simulate the performance of a laser-diode side-pumped Ho:Tm YLiF4 2μm laser.

© 2002 Optical Society of America

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