Evaluation of Broadband Spectral Properties of Erbium-Doped Aluminium Fluorophosphate Glass

Spectral properties of Er³⁺-doped aluminium fluorophosphate glasses are experimentally investigated and calculated. The full width at half maximum is 53 nm and the emission cross section is 0.6 x 10^-20cm². The measured lifetime of the ⁴I_13/2 level is 8±0.4 ms and the temperature difference is about 160°C. These parameters are comparable with those in other glasses, which indicates that Er³⁺-doped aluminium fluorophosphates glass is a promising material for Er³⁺ to realize broadband amplification.