1. Impact of red lead on 0.65 and 1.3 μm emissions of Pr3+ ions in a non-conventional antimony oxide glass system for application in optical communication.
- Author
-
Rao, Y. Dana, Venkatramaiah, N., Sekhar, A. Venkata, Purnachand, N., Kumar, V. Ravi, and Veeraiah, N.
- Subjects
LEAD ,ION emission ,ANTIMONY ,GLASS ,QUANTUM efficiency ,OPTICAL communications - Abstract
This research delves into the influence of red lead content on the red and NIR emission characteristics of Pr
3+ ions within a nonconventional antimony silicate glass system. The glasses were synthesized across a composition spectrum of (40 − x) Pb3 O4 ‒49Sb2 O3 ‒(10 + x)SiO2 :1Pr2 O3 , where x ranged from 0 to 35 mol%. Characterization was carried out using XRD, DSC, XPS, and IR spectroscopy. These analyses unveiled the presence of antimony ions in both Sb3+ and Sb5+ states and lead ions in Pb4+ and Pb2+ states within these glass compositions. Optical absorption and emission spectra (at λexc = 445 nm) were recorded within the wavelength range of 400‒1800 nm. Luminescence decay profiles of two pivotal transitions, namely,3 P0 →3 F2 (red emission) and1 G4 →3 H5 (1.3 µm NIR emission), were also recorded. Various radiative parameters from these spectra were extracted using the J–O theory. The findings indicated that, as the Pb3 O4 content declined from 40 to 10 mol%, the covalent nature of the samples diminished, resulting in a remarkable amplification in the intensity of both the red and NIR emission bands of Pr3+ ions. The glass containing 10 mol% of Pb3 O4 exhibited the most elevated radiative parameters and quantum efficiency. This augmentation was attributed to the reduction of Pb4+ and Sb5+ ions within the glass network or the augmentation of Pb2+ ions, serving as modifiers that mitigated phonon losses. Consequently, glasses with 10 mol% Pb3 O4 demonstrate great potential for telecommunications applications, owing to their significant enhancement in PL emission for the3 P0 →3 F2 and1 G4 →3 H5 transitions. [ABSTRACT FROM AUTHOR]- Published
- 2023
- Full Text
- View/download PDF