Abstract

This Letter determines the Cr2+-Fe2+ ions energy transfer process parameters in the Zn1xMnxSe:Cr2+,Fe2+ (x=0.3) crystal and demonstrates a dipole-dipole type of the Cr2+-Fe2+ ions nonradiative energy transfer. The intracavity Cr2+-Fe2+ pumping as well as pumping through Cr2+-Fe2+ energy transfer in the Zn1xMnxSe:Cr2+, Fe2+ (x=0.3) crystal under 1735 nm excitation by an YLF:Er laser was realized in a temperature range of 78 up to 150 K for the first time, to the best of our knowledge. Output pulse energy up to 20 μJ at 4400nm under 5.5 mJ of 1735 nm absorbed pump energy was obtained for the Cr2+-Fe2+ ions energy transfer mode.

© 2019 Optical Society of America

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