A spectroscopic investigations of Ho3+ doped CaO-Na2O-Al2O3-B2O3 glass for green lighting and eye-safe lasers applications
摘要
The CaO-Na2O-Al2O3-B2O3-Ho2O3 glasses (0 ≤ x ≤ 2 mol%) were fabricated via melt quenching technique. Comprehensive characterization revealed an increase in density, molar volume, and refractive index with rising Ho3+ ion concentration. Optical absorption spectra analysis yielded Judd–Ofelt parameters: Ω2 = 6.4268 × 10−20 cm2, Ω4 = 2.7468 × 10−20 cm2, and Ω6 = 2.5888 × 10−20 cm2. These results indicate promising optical properties for CaNaAlB glass doped with 0.1 mol% Ho2O3. Experimental and calculated branching ratios for 5F4 → 5I8 transition is recorded to be 0.64 and 0.82 respectively. The stimulated emission cross-section for NaCaAlB glasses was 4434 s−1, while the total radiative transition probability was 5294.48 s−1. Chromaticity coordinates for NaCaAlB glasses doped with Ho3+ ions were calculated, confirming their potential for green lighting and eye safe laser applications.