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An Upconversion Pumped Laser at 1.73 μm in Er:LiYF4 at Room Temperature

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Abstract

Using excitation via an upconversion process to populate the upper laser level, laser emission at 1.73 μm from the 4S3/24I9/2 transition has been observed in 4% and 8% Er:LiYF4 (Er:YLF) at room temperature. Laser emission at 1.68 μm from the erbium 4I9/24I13/2 transition was also observed in both samples.

© 1987 Optical Society of America

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