Study on photorefractive property of Mg:Fe:LiNbO3 crystal

Zhaopeng Xu; Shiwen Xu; Yuheng Xu; Rui Wang

doi:10.1117/12.572572

7 February 2005 Study on photorefractive property of Mg:Fe:LiNbO₃ crystal

Zhaopeng Xu, Shiwen Xu, Yuheng Xu, Rui Wang

Proceedings Volume 5636, Holography, Diffractive Optics, and Applications II; (2005) https://doi.org/10.1117/12.572572
Event: Photonics Asia, 2004, Beijing, China

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 # = (τ_e ∠√η)/τ_ω. The results indicated that Mg (4 mol%): Fe:LiNbO₃ was the most proper holographic recording media material among four crystals in the paper.

Citation Download Citation

Zhaopeng Xu, Shiwen Xu, Yuheng Xu, and Rui Wang "Study on photorefractive property of Mg:Fe:LiNbO₃ crystal", Proc. SPIE 5636, Holography, Diffractive Optics, and Applications II, (7 February 2005); https://doi.org/10.1117/12.572572

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