Working in the area of Solid State Spectroscopy with special interest on characterization and laser analysis of different rare earth ions doped borate, phosphate, tellurite glass systems and phosphor materials. I have studied structural, thermal and optical roperties of rare earth doped bismuth borate glasses using various techniques XRD, SEM, TG-DTA, optical absorption, photoluminescence and decay curves. In this work, I have concentrated on optical properties of rare earth glassy materials like spectral intensities, radiative transition probabilities, radiative lifetimes, branching ratios,...