Abstract

We present the results of nondegenerate two-wave mixing measurements in Cr⁻³:YAlO₃ and in Cr⁻³: Er⁻³:YAlO₃ in which the induced index change arises from the population of the ²E excited state of the chromium. The presence of erbium ions alters the ²E-level lifetime and quenches the chromium nonlinearity. We interpret our results in terms of a model in which different lifetimes are assigned to the chromium ions. Chromium ions close enough to an erbium ion to experience quenching by nonradiative energy transfer have lifetimes that are shorter than chromium ions that are not affected by energy transfer.

© 1996 Optical Society of America

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