Absorption and emission spectra of Pr3+-doped mixed alkali fluorophosphate optical glasses

This short letter reports various physical, absorption and emission properties of a new family of six praseodymium doped fluorophosphate glasses with mixed alkali fluorides (LiF-NaF, NaF-KF and KF -LiF) as network modifiers (NWM). The Judd-Ofelt results obtained from VIS-NIR absorption measurements have been applied to the measured photoluminescence spectra to evaluate the transition probability (A) radiative branching ratio (βR) and the stimulated emission crosssection (σse) of the emission transitions. The obtained results show that the optical properties are found interesting in glass-F which contains 5 Mole % of LiF and 15 Mole % of KF as the network modifiers. Fluorophosphate glasses have been the subject of several spectroscopic investigations, due to their potential as laser host matrix [1–4]. Optimizing the laser performance of a lanthanide ion in a glass matrix is possible only after a good understanding of the spectroscopic and related properties. This letter is a brief report on the absorption and emission spectra of pr3+doped fluorophosphate optical glasses. The glasses of the following composition were prepared by employing a quenching technique as described in our earlier papers [5–7].