Synthesis and properties of Pr3+-doped Ge–Ga–Se glasses

Abstract Homogeneous, pure and praseodymium-doped (Ge30Ga5Se65)100−x(Pr2Se3)x glasses, x=0–0.7, were prepared. Thermal properties of prepared glasses were determined. From the room temperature transmission spectra, the experimental oscillator strengths of six f–f electron transitions of Pr3+ ions were obtained. Judd–Ofelt intensity parameters (Ω 2 =6.0×10 −20 cm 2 ,Ω 4 =16.8×10 −20 cm 2 ,Ω 6 =5.0×10 −20 cm 2 ) were evaluated by least-square fitting method using the six experimental oscillator strengths of the Pr3+ electric dipole transitions. Using the Judd–Ofelt theory, the spontaneous emission probabilities and the branching ratios were calculated.