Spectroscopic properties of Dy3+-doped alkali and mixed alkali borosilicate glasses

Abstract

Using the melt quenching technique, a new Dy3+-doped alkali and mixed alkali based borosilicate glasses were prepared and characterized for spectroscopic properties to be used to assess the potentiality for the laser gain media. The FTIR, absorption and fluorescence spectra were investigated. According to the Judd-Ofelt theory, from the absorption spectra, the oscillator strengths were computed for the observed bands of Dy3+-doped borosilicate glasses. The spectroscopic properties, J–O intensity parameters and luminescence intensity of Dy3+-ions are compared in alkali and mixed alkali based borosilicate glasses. By the comparison, low δrms (0.323), high Ω2 (11.98 × 10−20 cm2), high Ω4/Ω6 (1.164) and enhanced luminescence intensity indicates that Dy3+-ions doped mixed alkali borosilicate (especially MgNaKBSi) glasses are potentially useful candidates for laser gain media.