Spectral characterization of Dy3+ ions doped phosphate glasses for yellow laser applications

Dy3+ ions doped phosphate glasses were prepared using sudden melt quench method. The studies like XRD, FT-IR, optical absorption, photoluminescence excitation, photoluminescence (PL), and PL decay were conducted to understand the spectroscopic properties. The Judd-Ofelt (J-O) parameters evaluated from absorption spectral features were employed to evaluate various radiative parameters of Dy3+ ions in phosphate glasses. Two intense bands were observed in PL spectra, in blue and yellow regions under 387 nm excitation. The emission spectra indicate concentration quenching for phosphate glass with 1 mol% of Dy3+ ions, which may be ascribed to dipole-dipole interactions between Dy3+ ions (Dexter theory). These PL spectral features were also used to estimate Y/B intensity ratio, CIE-chromaticity coordinates to understand the utility of prepared glasses in Lasers. The stimulated emission cross-sections, branching ratios, quantum efficiencies and CIE-color coordinates evaluated to validate the suitability of the prepared glasses for yellow laser applications.

Automated summary

Dy3+ ions doped phosphate glasses were prepared and characterized using various spectroscopic techniques, revealing intense emission bands in blue and yellow regions under 387 nm excitation. Concentration quenching was observed for phosphate glass with 1 mol% of Dy3+ ions, indicating potential dipole-dipole interactions between Dy3+ ions. The spectroscopic features were also used to evaluate the suitability of the glasses for yellow laser applications through stimulated emission cross-sections, branching ratios, quantum efficiencies, and CIE-color coordinates.