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Browse Journals & Magazines > Photonics Technology Letters, ...> Volume:24 Issue:19 Help

Intense Near-UV Upconversion Luminescence in {\rm Tm}^{3+}/{\rm Yb}^{3+} Co-Doped Low-Phonon-Energy Lithium Gallogermanate Oxide Glass

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4 Author(s)
Bo Zhou ; Dept. of Electr. Eng., Hong Kong Polytech. Univ., Kowloon, China ; Lili Tao ; Wei Jin ; Tsang, Y.H.

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.

Published in:
Photonics Technology Letters, IEEE  (Volume:24 ,  Issue: 19 )

Date of Publication: Oct.1, 2012

Page(s):
1726 - 1729
ISSN :
1041-1135
INSPEC Accession Number:
12982243
Digital Object Identifier :
10.1109/LPT.2012.2213805
Product Type:
Journals & Magazines
Date of Publication :
17 August 2012
Date of Current Version :
11 September 2012
Issue Date :
Oct.1, 2012
Sponsored by :
IEEE Photonics Society

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