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840 mW continuous-wave Fe:ZnSe laser operating at 4140 nm

Jonathan W. Evans, Patrick A. Berry, and Kenneth L. Schepler

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Abstract

We report the demonstration of high-power (840 mW) continuous-wave laser oscillation from Fe2+ ions in zinc selenide. The output spectrum of the Fe:ZnSe laser had a line-center near 4140 nm with a linewidth of 80 nm. The beam quality was measured to be M2≤1.2 with a maximum slope efficiency of 47%. Small shifts observed in output wavelength with increased output power were attributed to thermal effects. No thermal roll-off of slope efficiency was observed at the maximum of output power.

© 2012 Optical Society of America

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