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Dual-wavelength continuous-wave cascade oscillation at 3 and 2 µm with a holmium-doped fluoride-glass fiber laser

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Abstract

We have demonstrated dual-wavelength continuous-wave oscillation at 3 and 2 µm with a Ho-doped ZrF4BaF2LaF3AlF3NaF fluoride-glass fiber laser by use of a cascade oscillation scheme. We have shown that the fiber laser operates with a high slope efficiency of 52% (at 3 and 2 µm) with respect to the absorbed pump power. With a 6.5-m-long fiber we achieved an output power of 90 mW at each of the wavelengths that was limited only by the pump power, and the 3µm output power is to our knowledge higher than any previously reported level with 3µm Ho3+-doped fiber lasers.

© 1998 Optical Society of America

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