Abstract
There is currently interest in the development of solid state lasers that operate in a wide spectral range from visible to IR by pumping both by flash lamp and laser diodes. The most promising materials for UV, visible, and IR lasers are rare earth-doped double fluoride lithium-yttrium crystals (TR3+:LiYF4 or TR3+:YLF). They are characterized by low values of nonlinear refractive index (n2) and high optical damage resistance. Among TR3+: YLF crystals, the considerable interest is in Er3+:YLF crystals that exhibit certain desirable properties such as a wide range of dopant ion concentrations together with material availability in large apertures of excellent optical quality. A Er3+:YLF laser emission is available in the IR and visible spectral ranges at a number of transitions by flash lamp and laser diode pumping, including up-conversion IR pumping.
© 1994 IEEE
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