Study on influence of modifiers on structural and spectroscopic properties of Nd3+ doped different lithium tetra borate glasses

Abstract

Different multi-component (Li, Na, Ca, Ba, LiNa, BaCa) borate glasses doped with 1 mol% of Nd3+ ions were prepared by the melt-quenching method. The structural information was carried out by PXRD, FTIR and 11B MAS-NMR characterizations. Based on Thermogravimetry (TG) and Differential Scanning Calorimetry (DSC), thermal stability has been taken care for the glass samples which are mentioned at present work. From PXRD, it is clearly observed that the prepared glass samples are amorphous in nature. The FTIR spectra were examined to determine if the borate glasses contained BO3 or BO4 functional groups.11B MAS NMR gives structural presentation of BO3 and BO4 groups and boron-oxygen coordination number. The evaluation of Judd-Ofelt parameters, Ω λ (λ = 2, 4, 6), and spectroscopic quality factors (χ) were conducted based on the optical absorption spectra and spectral intensities. The present study involves an analysis of the transition probabilities (A) and branching ratios (β) of specific transitions of Nd3+ ion doped in various glasses, utilizing the Judd-Ofelt intensity parameters. The emission spectra of the glass samples were recorded with 808 nm excitation, it shows three peaks at 881, 1050 and 1332 nm. Theoretical analysis was conducted on the luminescence properties of borate glasses, and various radiative properties were also investigated. From the luminescent properties of Nd3+ doped different lithium tetraborate glasses, it is concluded that LiBiNaTNd and LiBiBaCaTNd glasses are promising gain materials for 1.05 μm fiber laser applications.