Optical spectroscopy, 1.06 μm emission properties of Nd3 +-doped phosphate based glasses

Abstract Neodymium doped phosphate based glasses with composition of (P 2 O 5  + K 2 O + Al 2 O 3  + CaF 2 ) were prepared. The samples were analysed through differential thermal analysis (DTA), Fourier transform infrared (FTIR), absorption, emission and decay measurements. Judd-Ofelt parameters (Ω λ ) have been determined from the spectral intensities of absorption bands in order to calculate the radiative parameters like radiative transition probabilities (A R ), radiative lifetime (τ R ) and branching ratios (β R ) for the 4 F 3/2  →  4 I 11/2 laser transition of Nd 3 + ion. The effective emission bandwidths (Δλ eff ), experimental branching ratios (β exp ) and stimulated emission cross-sections (σ e ) have been determined from the emission spectrum. The decay curves of the 4 F 3/2 level exhibited almost single exponential nature for all the Nd 3 + ion concentrations.