TITLE

Green-induced infrared absorption in MgO doped LiNbO[sub 3]

AUTHOR(S)
Furukawa, Y.; Kitamura, K.; Alexandrovski, A.; Route, R. K.; Fejer, M. M.; Foulon, G.
PUB. DATE
April 2001
SOURCE
Applied Physics Letters;4/2/2001, Vol. 78 Issue 14, p1970
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Green-induced infrared absorption (GRIIRA) was investigated by a photothermal technique for undoped and Mg-doped LiNbO[sub 3] crystals that have different Li/Nb ratios. Threshold effect on GRIIRA was found, threshold MgO concentrations being the same for GRIIRA and photorefraction. We suggest that GRIIRA is associated with the formation of the small polaron that is located on Nb antisite defect. The remarkable decrease of GRIIRA in Mg:LiNbO[sub 3] can then be attributed to the elimination of this intrinsic defect, Nb in Li, following the incorporation of Mg on Li sites. For nonlinear optical applications, LiNbO[sub 3] doped with MgO at concentrations over threshold has a combined advantage of having almost no GRIIRA and photorefraction. © 2001 American Institute of Physics.
ACCESSION #
4710205

 

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