Optical properties of Nd3+ ions in cadmium borosulphate glasses and comparative energy level analyses of Nd3+ ions in various glasses

Optical properties of Nd3+ ions are studied in the following cadmium borosulphate(CBS) glasses: CdSO4 + B2O3 and R(2)SO(4) + CdSO4 + B2O3 (R(2)SO(4) = Li2SO4 . H2O, Na2SO4, K2SO4 and Gd-2(SO4)(3) 8H(2)O). The assigned energy level data of Nd3+ (4f(3)) in CBS glasses as well as the data that are available for other 20 Nd:glass systems in the literature are analysed in terms of a parametrized free-ion Hamiltonian model (H-FI) that consists of 20 interaction parameters of atomic nature. The systematic theoretical energy level analysis with uniform H-FI results in good correlation between calculated and observed energies. Judd-ofelt intensity parameters for f-f transitions are derived from the integrated absorption spectra and are used to calculate the radiative properties for fluorescent levels of Nd3+ ions in borosulphate glasses. The variations in the spectroscopic properties due to compositional changes of the glasses are discussed.