Spectroscopic characterization and diode-pumped 910 nm laser of Nd:LiLuF4 crystal

Polarized absorption and fluorescence spectra Nd 3+ -doped LiLuF 4 single crystal were investigated. The peak emission cross section at 905 and 910 nm are 0.97 × 10 −20 and 0.82 × 10 −20 cm 2 , respectively. Two samples with different dimensions were tested in the laser experiments. With a laser-diode as the pump source, a maximum 1.17 W laser output at 910 nm has been obtained with a slope efficiency of 16.3% with respect to the pump power.