Room temperature infrared-laser-induced upconversion in Nd3+ doped Ta205 waveguides

Lahoz, F., Martín, I.R., Shepherd, David, Wilkinson, J.S. and Hassan, M.A. (2006) Room temperature infrared-laser-induced upconversion in Nd3+ doped Ta205 waveguides. Chemical Physics Letters, 421, (1-3), 198-204. (doi:10.1016/j.cplett.2006.01.076).


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The room temperature infrared to visible upconversion properties of Nd3+ doped Ta2O5 rib waveguides deposited on a silica substrate have been investigated in the 720-900 nm excitation range. Two possible upconversion mechanisms exist at different excitation wavelengths. The main one is due to energy transfer upconversion and results in the population of the 4G7/2 level. Radiative relaxations from this level to the 4I9/2, 4I11/2 and 4I13/2 multiplets produce visible emission bands in the green, orange and red regions. Excited state absorption from the 4F3/2 to the 2P1/2 state can also occur, giving rise to a blue emission band (2P1/2 to 4I9/2). A rate equation analyses supports the proposed mechanisms.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/j.cplett.2006.01.076
ISSNs: 0009-2614 (print)
Related URLs:
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions : University Structure - Pre August 2011 > Optoelectronics Research Centre
ePrint ID: 38971
Accepted Date and Publication Date:
Date Deposited: 14 Jun 2006
Last Modified: 18 Sep 2016 16:50

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