Abstract
We demonstrate and analyze an upconversion blue fiber laser pumped by two
wavelengths. Lasing at 0.48 µm with very low pump threshold power is
obtained from a Tm-doped fluorozirconate fiber that is counterpropagating
pumped by 1.21- and 0.649-µm light. We employed a rate-equation analysis
using parameters obtained by fitting to the experimental data to predict the
0.48-µm output characteristics as a function of fiber length and output
reflectivity.
© 1997 Optical Society of America
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