Abstract
Intense near-ultraviolet (UV) upconversion emission of 365 nm has been obtained in Tm3+/Yb3+co-doped lithium gallogermanate oxide glass upon a 980-nm laser diode excitation. This near-UV emission originates from the Tm3+:1D2→3H6 transition. The cross relaxation process [1G4,3H4]→[3F4,1D2] is shown to play a critical role in population of the emitting level Tm3+1D2. The low phonon energy (∼825 cm-1) and high transparency at near-UV of the glass matrix also contribute to this emission. The emission cross section is calculated to be 6.46 10-21cm2, which is larger than Tm3+1.47 and 1.80-μm transitions. The results indicate that, other than single crystal and nano-glass-ceramic, this system is a promising alternative for development of near-UV lasers.
Original language | English |
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Article number | 6272322 |
Pages (from-to) | 1726-1729 |
Number of pages | 4 |
Journal | IEEE Photonics Technology Letters |
Volume | 24 |
Issue number | 19 |
DOIs | |
Publication status | Published - 24 Sept 2012 |
Keywords
- Energy transfer
- Low-phonon-energy oxide glass
- Tm near-ultraviolet (UV) upconversion luminescence 3+
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering