Abstract
Lead borosilicate (LBS) glasses incorporated with europium (Eu3+) ions were synthesized using various chemical constituents. The structure of the glass matrix has been studied by experimental techniques such as X-ray diffraction (XRD), Fourier transform infrared (FTIR), optical absorption (OA) and photoluminescence (PL) spectroscopy. From the XRD spectrum, several crystalline phases of LBS glass host were identified. The FTIR spectrum of the LBS glass host was recorded to investigate the local structural and functional groups. Due to the different characteristic nature of the Eu3+ ion, the absorption bands were observed from the ground (7F0) and the first excited (7F1) states. Further, Judd-Ofelt theory has been applied to compute the intensity parameters (Ωλ, λ = 2, 4 and 6) from the absorption intensities of 7F0 → 5D2 and 7F0 → 5L6 transitions, respectively. Characteristic emission bands are observed at 578, 592, 613,653 and 701 nm corresponding to 5D0 → 7F0, 7F1, 7F2, 7F3 and 7F4 transitions, respectively. The radiative and laser characteristic parameters like stimulated emission cross-section (σe) and branching ratios (βR) of the 5D0 excited level are computed. From the magnitude of stimulated emission cross-section (σe) and branching ratios (βR) obtained for 5D0 → 7F2 transition revealed that, Eu3+: LBS glasses are suitable for good laser action in the visible region.
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