1.3 μm emission and multiphonon relaxation phenomena in PbOBi 2O 3Ga 2O 3 glasses doped with rare-earths

Abstract

The 1.3 μm fluorescent emissions from PbOBi 2O 3Ga 2O 3 glasses doped with Pr 3+ or Dy 3+ were measured. Modified Judd—Ofelt analysis was applied to the Pr 3+-doped glasses to obtain intensity parameters and radiative properties. Emission from the Pr 3+: 1G 4 → 3H 5 transition in heavy metal oxide (HMO) glass was centered at the wavelength of 1320 nm with a spectral bandwidth of 100 nm. The lifetime of the 1G 4 level was 53 μs with a quantum efficiency of 9%. Excited-state absorption near the 1.3 μm emission were comparable to those in fluoride glasses. Multiphonon relaxation rates in PbOBi 2O 3Ga 2O 3 glasses calculated from the lifetimes were similar to those of fluoride glasses, but were the smallest among oxide glasses.