Growth, Structure and Spectroscopy of a Novel Molybdate Laser Crystal - $\text{Tm}:\text{MgMoO}_{4}$

Thulium-doped magnesium molybdate crystal
$(Tm: \text{MgMoO}_{4})$
was grown by the Czochralski method. It belongs to the monoclinic class (sp. gr.
$C2/m)$
. Its spectroscopic properties are studied.
$\text{Tm}:\text{MgMoO}_{4}$
exhibits broad and smooth emission spectrum extending beyond
$2\ \mu\mathrm{m}({{}^{3}\mathrm{F}}_{4}\rightarrow {{}^{3}\mathrm{H}}_{6}$
transition) and a long lifetime of the
${{}^{3}\mathrm{F}}_{4}$
state (1.90 ms) making it promising for broadly tunable and mode-locked lasers.