Optical properties of Sm3+ions doped 10SrO-(10−x)Al2O3-10BaCl2-60B2O3-10TeO2 glasses for reddish orange laser applications

Highlights: • OCBTSm glasses were prepared by melt quenching method. • A sharp luminescence is observed in the reddish-orange region at 600 nm. • Concentration quenching is observed beyond 1.0 mol%. • Dipole-dipole interactions are dominated in OCBTSm glasses. • CIE coordinates confirm the suitability of OCBTSm1.0 glass for reddish-orange laser. In the present work, oxy chloro boro tellurite (OCBT) glasses were prepared with the composition 10SrO-(10−x)Al₂O₃-10BaCl₂-60B₂O₃-10TeO₂-rSm₂O (where r = 0.5, 1.0, 1.5, 2.0 and 2.5 mol%) using melt quenching technique. Several optical properties were studied after thorough analysis of absorption, excitation, photoluminescence (PL) and PL decay profiles of these glasses. Judd-Ofelt parameters evaluated from the absorption spectra are used to understand the asymmetry around the Sm³⁺ ions in the present reported glasses. An effort has been made to understand the PL properties of these glasses by evaluating the key parameters such as branching ratios and stimulated emission cross-sections and quantum efficiencies. In the process of understanding mutual interaction between the Sm³⁺ ions, Inokuti-Hirayama (I-H) method is applied. CIE color co-ordinates also measured to confirm the reddish orange emission from these glasses. From all obtained parameters, it can be suggested that OCBTSm1.0 glass is aptly suitable for reddish orange laser applications.