Abstract
Efficient operation of the 2µm Ho laser at temperatures near room temperature is a requirement for this to be a practical laser. In earlier reported results on Ar laser pumped Ho:YLF sensitized by Er and Ho we demonstrated efficient operation at 77K[1]. The internal quantum efficiency was found to be near 300% and the overall power efficiency near 50%. This laser crystal was operated at 210K but with considerably lower efficiency.
© 1992 Optical Society of America
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