Judd-Ofelt parametrization and radiative transitions analysis of Tm3+ doped alkali chloroborophosphate glasses

Absorption spectra for Tm3+ doped alkali chloroborophosphate glasses are recorded in the W-VIS and NIR regions. The assigned energy level data of Tm3+ (4f(12)) in these glasses are analysed in terms of a parametrized Hamiltonian model that includes 14 free-ion parameters. From the measured oscillator strengths of the absorption bands, the intensity parameters, Ohm(lambda), are calculated by using the Judd-Ofelt theory. Using these data, radiative transition probabilities, radiative lifetimes, branching ratios and integrated absorption cross-sections for P-3(0), D-1(2) and (1)G(4) fluorescent levels are calculated. Certain laser transitions are predicted. (C) 1999 Elsevier Science B.V. All rights reserved.