1. Broadband Near-Infrared Luminescence in Lead Germanate Glass Triply Doped with Yb 3+ /Er 3+ /Tm 3+.
- Author
-
Pisarski, Wojciech A., Pisarska, Joanna, Lisiecki, Radosław, and Ryba-Romanowski, Witold
- Subjects
- *
GERMANATE glasses , *THULIUM , *YTTERBIUM , *CRYSTAL glass , *LUMINESCENCE , *THULIUM ions , *DOPING agents (Chemistry) - Abstract
This paper deals with broadband near-infrared luminescence properties of lead germanate glass triply doped with Yb3+/Er3+/Tm3+. Samples were excited at 800 nm and 975 nm. Their emission intensities and lifetimes depend significantly on Er3+ and Tm3+ concentrations. For samples excited at 800 nm, broadband emissions corresponding to the overlapped 3H4 → 3F4 (Tm3+) and 4I13/2 → 4I15/2 (Er3+) transitions centered at 1.45 µm and 1.5 µm was identified. Measurements of decay curves confirm reduction of 3H4 (Tm3+), 2F5/2 (Yb3+) and 4I13/2 (Er3+) luminescence lifetimes and the presence of energy-transfer processes. The maximal spectral bandwidth equal to 269 nm for the 3F4 → 3H6 transition of Tm3+ suggests that our glass co-doped with Yb3+/Er3+/Tm3+ is a good candidate for broadband near-infrared emission. The energy transfer from 4I13/2 (Er3+) to 3F4 (Tm3+) and cross-relaxation processes are responsible for the enhancement of broadband luminescence near 1.8 µm attributed to the 3F4 → 3H6 transition of thulium ions in lead germanate glass under excitation of Yb3+ ions at 975 nm. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF