Spectroscopic properties and Judd-Ofelt theory analysis of Dy3+ doped oxyfluoride silicate glass

Dy 3 + doped oxyfluoride silicate glass was prepared and its optical absorption, 1.3μm emission, and upconversion luminescence properties were studied. Furthermore, the Judd-Ofelt [Phys. Rev. 127, 750 (1962); J. Chem. Phys. 37, 511 (1962)] intensity parameters, oscillator strengths, spontaneous transition probability, fluorescence branching ratio and radiative lifetime were calculated by Judd-Ofelt theory, while stimulated emission cross section of H9∕26+F11∕26→H15∕26 transition was calculated by McCumber theory [Phys. Rev. A. 134, 299 (1964)]. According to the obtained Judd-Ofelt intensity parameters Ω2=2.69×10−20cm2, Ω4=1.64×10−20cm2, and Ω6=1.64×10−20cm2, the radiative lifetime was calculated to be 810μs for 1.3μm emission, whose full width at half maximum and σe were 115nm and 2.21×10−20cm2, respectively. In addition, near infrared to visible upconversion luminescence was observed and evaluated. The results suggest that Dy3+ doped oxyfluoride silicate glass can be used as potential host material for developing broadband optical amplifiers and laser applications.