Hypersensitive transition 3P0 → 3F2 of Pr3+ related to the polarizability and structure of glass host

We report on the hypersensitivity of the 3P0 → 3F2 emission transition (630–650 nm) of Pr3+ in a series of fluoride, germanium sulfide and in some tellurium oxide and silica-based oxide and oxy-fluoride glasses. The relative intensity of this transition was dependent on the type of the glass host. We suggest the mechanisms for the hypersensitivity in relationship to the glass host polarizability and structure.