Dy3+ doped oxyfluoride silicate glass was prepared and its optical absorption, 1.3 μm 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 6H9/2+6F11/2→6H15/2 transition was calculated by McCumber theory [
Phys. Rev. A. 134, 299 (1964)
]. According to the obtained Judd-Ofelt intensity parameters Ω2 = 2.69×10−20 cm2, Ω4 = 1.64×10−20 cm2, and Ω6 = 1.64×10−20 cm2, the radiative lifetime was calculated to be 810 μs for 1.3 μm emission, whose full width at half maximum and σe were 115 nm 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.