Abstract
Spectral properties of Nd, Gd:CaF2 crystals were investigated. In comparison with Nd:CaF2, the spectral parameters of Nd, Gd:CaF2 were altered in a large scale. LD-pumped true CW laser has been demonstrated in the crystals. The slope efficiency with the value of 45% in 0.5 at.% Nd, 5 at.% Gd:CaF2 was achieved, it is the highest slope efficiency in Nd doped CaF2 single crystals by LD-pumping. The system is a promising candidate for highly efficient lasers.
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