Optical spectroscopy, 1.06μm emission properties of Nd 3+ -doped phosphate based glasses.

Neodymium doped phosphate based glasses with composition of (P2 O5 +K2 O+Al2 O3 +CaF2 ) were prepared. The samples were analysed through differential thermal analysis (DTA), Fourier transform infrared (FTIR), absorption, emission and decay measurements. Judd-Ofelt parameters (Ωλ ) have been determined from the spectral intensities of absorption bands in order to calculate the radiative parameters like radiative transition probabilities (AR ), radiative lifetime (τR ) and branching ratios (βR ) for the4 F3/2 →4 I11/2 laser transition of Nd3+ ion. The effective emission bandwidths (Δλeff ), experimental branching ratios (βexp ) and stimulated emission cross-sections (σe ) have been determined from the emission spectrum. The decay curves of the4 F3/2 level exhibited almost single exponential nature for all the Nd3+ ion concentrations.