Spectroscopic investigation of Sm<inf>2</inf>O<inf>3</inf>-activated barium calcium strontium borate glasses for laser and display-devices applications

Abstract

The Sm2O3-activated barium calcium strontium borate (BCSrSm) glasses were prepared via the melt-quenching route, and investigates important parameters such as absorption spectra, excitation, and luminescence, lifetime decay and luminescent color. The absorption-spectra exhibits ten absorption transitions related to the ground state (6H5/2)-to-excited states. The JO-parameters trend obtained for BCSSm glasses is as Ω4 > Ω6 > Ω2. The lower value of Ω2 of Sm3+ ions indicates weaker samarium-oxygen-bond's covalency. High optical gain and high figure of merit, predicting the amplification of the laser medium, are relatively larger for 4G5/2→6H7/2. The alteration in the local environment around Sm3+ ions influence transitions’ intensities. Concentration quenching effect was observed for 0.5 mol% of Sm3+-ions concentration. the measured values are 1.732–0.706 ms and decreases as the content increases from 0.1 to 1.5 mol%. The CIE chromaticity coordinates of all glasses locate in the orange region and CCT 1720 K, showing the promising candidature of the present glasses for orange laser materials and display-devices applications.