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Proceedings Paper

Study on photorefractive property of Mg:Fe:LiNbO3 crystal
Author(s): Zhaopeng Xu; Shiwen Xu; Yuheng Xu; Rui Wang
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Paper Abstract

The congruent Fe (0.03%wt):LiNbO3 crystals doped with different concentration of MgO (0, 2, 4, 6 mol%) were grown by Czochralski method in air atmosphere. The ultraviolet-visible absorption spectra, infrared absorption spectra of the crystals were measured in order to analyze their structure. The absorption edge of the Mg: Fe: LiNbO3 crystals shifted to the ultraviolet band compared with that of Fe: LiNbO3. The OH- absorption peaks of I and II crystals located at about 3483cm-1, while those of III and IV crystals shifted to 3536cm-1. The mechanism of OH- absorption peak shifting was studied. The light scattering ability resistance of Mg: Fe: LiNbO3 crystal was observed by straightly observing transmission facula distortion method. It indicated that light scattering ability resistance of III crystals was three orders of magnitude higher than that of Fe: LiNbO3 crystals. The exponential gain coefficient, diffraction efficiency and respond time of Mg: Fe: LiNbO3 crystals were measured by two-wave-coupling technology. The results indicate that exponential gain coefficient of Mg: Fe: LiNbO3 crystal was almost four times as that of iron-doped LiNbO3 and the response time exhibited four times shorter than that of iron-doped LiNbO3. Furthermore, the dynamic range was also calculated by the expression: M # = (τe ∠√η)/τω. The results indicated that Mg (4 mol%): Fe:LiNbO3 was the most proper holographic recording media material among four crystals in the paper.

Paper Details

Date Published: 7 February 2005
PDF: 7 pages
Proc. SPIE 5636, Holography, Diffractive Optics, and Applications II, (7 February 2005); doi: 10.1117/12.572572
Show Author Affiliations
Zhaopeng Xu, Harbin Institute of Technology (China)
Shiwen Xu, Harbin Institute of Technology (China)
Yuheng Xu, Harbin Institute of Technology (China)
Rui Wang, Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 5636:
Holography, Diffractive Optics, and Applications II
Yunlong Sheng; Dahsiung Hsu; Chongxiu Yu; Byoungho Lee, Editor(s)

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