Intense yellow emission in Dy3+-doped LiGd(MoO4)2 crystal for visible lasers

The spectroscopic properties of Dy3+:LiGd(MoO4)2 crystal have been investigated with aim to assess the feasibility of laser operation in the yellow region. On the basis of the analysis of polarized absorption spectra in the framework of the Judd–Ofelt theory, the main spectroscopic characteristics relevant for laser applications have been determined. An intense yellow emission band corresponding to the 4F9/2 → 6H13/2 transition around 575 nm has been observed in the visible region. The emission cross-sections for the 4F9/2 → 6H13/2 transition have been calculated using the Füchtbauer–Ladenburg formula. The fluorescence and radiative lifetimes of the 4F9/2 manifold are equal to 139.0 μs and 199.1 μs, respectively, and the quantum efficiency is 69.8%.

► The polarized spectra properties of Dy3+:LiGd(MoO4)2 crystal have been recorded.
► The spectra parameters have been estimated based on the Judd–Ofelt theory.
► Dy3+:LiGd(MoO4)2 crystal exhibits large fluorescence branching ratio for yellow emission.
► The peak emission cross-section is comparable to that for Dy3+:YAl(BO3)4 crystal.