%0 Journal Article
%T Er3+/Ho3+-Codoped Fluorotellurite Glasses for 2.7 ¦Ìm Fiber Laser Materials
%A Yaoyao Ma
%A Feifei Huang
%A Lili Hu
%A Junjie Zhang
%J Fibers
%D 2013
%I MDPI AG
%R 10.3390/fib1020011
%X This work reports the enhanced emission at 2.7 ¦Ìm in Er 3+/Ho 3+-codoped fluorotellurite glass upon a conventional 980 nm laser diode. The significantly reduced green upconversion and 1.5 ¦Ìm emission intensity in Er 3+/Ho 3+-codoped samples are observed. The results suggest that the Er 3+: 4I 13/2 state can be efficiently depopulated via energy transfer from Er 3+ to Ho 3+ and the detailed energy transfer mechanisms are discussed qualitatively. The energy transfer efficiency from Er 3+: 4I 13/2 to Ho 3+: 5I 7 is calculated to be as high as 67.33%. The calculated emission cross-section in Er 3+/Ho 3+-codoped fluorotellurite glass is 1.82 ¡Á 10 £¿ 2 0 cm 2. This suggests that Er 3+/Ho 3+-codoped fluorotellurite glass is a potential material for 2.7 ¦Ìm fiber laser.
%K 2.7 ¦Ìm
%K Er3+/Ho3+-codoped
%K fluorotellurite glass
%K energy transfer mechanism
%U http://www.mdpi.com/2079-6439/1/2/11