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Proceedings Paper

Study on SHG property of Mg: Nd: LiNbO3 crystal
Author(s): Zhaopeng Xu; Shiwen Xu; Xuandong Li; Yuheng Xu; Xinrong Liu
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Paper Abstract

The congruent Nd (Nd: 0. 2 wt %): LiNbO3 crystals doped with different concentration of MgO (MgO: 1, 3, 5,7mol %) have been grown by Czochralski method in air atmosphere. The crystals were made into samples after polarization, cut and polishing. The infrared absorption spectra of Mg: Nd: LiNbO3 crystals were measured by using Fourier transform infrared spectrophotometer. The OH- absorption peaks of Mg (1mol %): Nd (0.2wt %): LiNbO3 crystal and Mg (3mol %): Nd (0.2wt %): LiNbO3 crystal located at about 3481cm-1, while that of Mg (5mol %): Nd (0.2wt %): LiNbO3 crystal and Mg (7mol %): Nd (0.2wt %): LiNbO3 crystal shifted to 3536cm-1. The mechanism of OH- absorption peak shifting was studied. The resistance to photodamage of Mg: Nd: LiNbO3 crystals were measured by light spot distortion method. The results show that the photodamage threshold of Mg (5mol %) :Nd(0.2wt%):LiNbO3 was the highest(9.0×104W/cm2) among the samples. The mechanism of the photodamage resistance ability of Mg:Nd:LiNbO3 increasing was investigated. Using a Q adjustable Nd: YAG laser as pumping light, the second harmonic generation (SHG) properties, including the phase matching temperature and SHG conversation efficiency of Mg: Nd: LiNbO3 were measured by 90 degree angle phase matching technology. The results showed that the SHG conversation efficiency of Mg (5mol %): Nd (0.2wt %): LiNbO3 was the highest (52%) among the samples at 96°C.

Paper Details

Date Published: 28 January 2005
PDF: 6 pages
Proc. SPIE 5646, Nonlinear Optical Phenomena and Applications, (28 January 2005); doi: 10.1117/12.572595
Show Author Affiliations
Zhaopeng Xu, Harbin Institute of Technology (China)
Shiwen Xu, Harbin Institute of Technology (China)
Xuandong Li, Harbin Institute of Technology (China)
Yuheng Xu, Harbin Institute of Technology (China)
Xinrong Liu, Harbin Institute of Technology (China)

Published in SPIE Proceedings Vol. 5646:
Nonlinear Optical Phenomena and Applications
Qihuang Gong; Yiping Cui; Roger A. Lessard, Editor(s)

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