Study on SHG property of Mg: Nd: LiNbO3 crystal

Zhaopeng Xu; Shiwen Xu; Xuandong Li; Yuheng Xu; Xinrong Liu

doi:10.1117/12.572595

28 January 2005 Study on SHG property of Mg: Nd: LiNbO₃ crystal

Zhaopeng Xu, Shiwen Xu, Xuandong Li, Yuheng Xu, Xinrong Liu

Proceedings Volume 5646, Nonlinear Optical Phenomena and Applications; (2005) https://doi.org/10.1117/12.572595
Event: Photonics Asia, 2004, Beijing, China

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.

Citation Download Citation

Zhaopeng Xu, Shiwen Xu, Xuandong Li, Yuheng Xu, and Xinrong Liu "Study on SHG property of Mg: Nd: LiNbO₃ crystal", Proc. SPIE 5646, Nonlinear Optical Phenomena and Applications, (28 January 2005); https://doi.org/10.1117/12.572595

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