Abstract

In this Letter, we report for the first time, to the best of our knowledge, a micron-sized mid-infrared Fe2+:ZnSe laser based on a single microcrystal. Typical laser emissions centering at 4.24 μm are observed from a selected Fe2+-doped ZnSe microcrystal under 2.94 μm excitation of Er:YAG laser at room temperature. The laser linewidth is 10  nm, the pulse width is 50  ns, and the lasing threshold is 7.4  mJ/pulse. The lasing wavelength is stable as the pump energy increases and is consistent with the strong absorption position of carbon dioxide in the atmosphere.

© 2018 Optical Society of America

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