Journal
OPTICAL MATERIALS
Volume 27, Issue 12, Pages 1839-1844Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2004.11.011
Keywords
spectroscopy; Yb+3; Er+3; energy transfer
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A poly-crystalline YAG matrix was obtained through the precipitation method; this matrix was single and co-doped with ytterbium and erbium ions, i.e., Yb:YAG, Er:YAG and Yb,Er:YAG. It is found that the measured luminescent properties are similar to those reported for a mono-crystal YAG matrix. In addition, by studying the energy transfer processes in co-doped samples, it is shown that at high erbium concentrations the red emission is enhanced through an up-conversion process that takes place from the I-4(13/2) to the F-4(9/2) state of erbium ions. This enhanced red emission becomes comparable in intensity to the observed green emission and occurs by pumping at 800 nm through a back energy transfer process. (c) 2004 Elsevier B.V. All rights reserved.
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