Influence of microscopic defects on optical damage resistance of Zn:Fe:LiNbO3 crystals by X. H. Zhen, Q. Li, and Y. H. Xu

Crystal Research and Technology

Cryst. Res. Technol. 41, 276 (2006) - Abstract -

Influence of microscopic defects on optical damage resistance of Zn:Fe:LiNbO₃ crystals

X. H. Zhen, Q. Li, and Y. H. Xu*

Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
*Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, P.R. China

Keywords	Zn:Fe:LiNbO₃ crystal, microscopic defect, optical damage resistance
PACS	42.70.Ln, 61.70Y, 07.60.Rd
DOI	10.1002/crat.200510573

Influence of defect structure on the infrared transmission spectra of OH^- in Zn:Fe:LiNbO₃ crystals with various ZnO concentration and different Li/Nb ratios was investigated. It indicates that above the Zn concentration threshold the OH^- absorptions bands successively shift from 3482cm^-1 to 3504cm^-1 and 3529cm^-1. The intensity of the 3504cm^-1 band increases with ZnO concentration increasing. The optical damage resistance of the Zn:Fe:LiNbO₃ crystals increases rapidly when the ZnO concentration exceeds a threshold value. This result contributed to the site alteration from the Li sites to Nb sites due to Zn-doping in crystal.

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