Pr3+-doped fluoride glass for a 589 nm fibre laser

Fluoroaluminate glass was investigated for a Pr3+-doped fibre laser at 589 nm using the (3P1+3P0)→3H6 transition. Enhanced emission at 589 nm was obtained by thermally populating the 3P1 level. Results indicate that lasing at 589 nm is possible in fluoroaluminate glass at elevated temperatures.