Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/33826
Title: Intense near-uv upconversion luminescence in Tm3+/Yb3+ Co-doped low-phonon-energy lithium gallogermanate oxide glass
Authors: Zhou, B
Tao, L
Jin, W 
Tsang, YH 
Issue Date: 2012
Source: IEEE photonics technology letters, 2012, v. 24, no. 19, p. 1726-1729
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+:D-1(2) -> H-3(6) transition. The cross relaxation process [(1)G(4), H-3(4)].[F-3(4), D-1(2)] is shown to play a critical role in population of the emitting level Tm3+ D-1(2). The low phonon energy (similar to 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 x 10(-21) cm(2), which is larger than Tm3+ 1.47 and 1.80-mu m 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.
Keywords: Energy transfer
Low-phonon-energy oxide glass
Tm3+ near-ultraviolet (UV) upconversion luminescence
Publisher: Institute of Electrical and Electronics Engineers
Journal: IEEE photonics technology letters 
ISSN: 1041-1135
EISSN: 1941-0174
DOI: 10.1109/LPT.2012.2213805
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