Spectral and Luminescence Study of Er3+ Doped Phosphate Glasses for the Development of 1.5 µm Broadband Amplifier

Ytterbium zinc lithium lead alumino antimony borophosphate glasses containing Er3+ in (25-x)P2O5: 10ZnO: 10Li2O: 10PbO: 10Al2O3: 10Sb2O3: 10Y2O3: 15B2O3: Er2O3 (where x=1, 1.5,2 mol %) have been prepared by melt-quenching method. The amorphous nature of the glasses was confirmed by x-ray diffraction studies. Optical absorption, excitation Spectrum and fluorescence spectra were recorded at room temperature for all glass samples. Judd-Ofelt intensity parameters Ωλ (λ=2, 4, 6) are evaluated from the intensities of various absorption bands of optical absorption spectra. Using these intensity parameters various radiative properties like spontaneous emission probability, branching ratio, radiative life time and stimulated emission cross– section of various emission lines have been evaluated.