Growth and Characterization of High Homogeneity Heavily MgO-doped Lithium Niobate Crystals

doi:10.3724/SP.J.1077.2010.01257

Journal of Inorganic Materials ›› 2010, Vol. 25 ›› Issue (12): 1257-1262.DOI: 10.3724/SP.J.1077.2010.01257

• Research Paper • Previous Articles Next Articles

Growth and Characterization of High Homogeneity Heavily MgO-doped Lithium Niobate Crystals

TU Xiao-Niu, ZHENG Yan-Qing, CHEN Hui, KONG Hai-Kuan, XIN Jun, ZENG Yi-Ming, SHI Er-Wei

(Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China)

Received:2010-03-16 Revised:2010-05-01 Published:2010-12-20 Online:2010-11-24
Supported by:
Knowledge Innovation Program of Chinese Academy of Sciences (KGCX2-YW-206); 863 Program of China (2006AA03Z423); Scientific Research Equipment Project of Chinese Academy of Sciences (YZ200934)

Abstract

Abstract: High homogeneity heavily MgO-doped lithium niobate (MgLN for short) single crystals were grown by Czochralski method. The as-grown crystals were poled at high temperature, so as to obtain single ferroelectric domain structure. UV absorption edge, OH absorption peak, optical homogeneity of the crystal were tested, respectively. Micro- compositions along the radial direction were analyzed by EDS method and “line scan” of the distribution of Mg element along the radial direction was investigated by WDS method. The results showed that high homogeneity MgLN crystals were obtained with proper starting composition and improved growth process of Czochralski technology. UV absorption edge at 308 nm and OH absorption peak at 2828 nm were observed. The optical homogeneity Δn<5.11×10^-5. Finally, ferroelectric domain structure was observed by optical microscope by chemical etching method. High uniformity single ferroelectric domain structure was obtained by applying an external electric field at 1200℃.

Key words: heavily MgO-doped lithium niobate, UV absorption edge, OH absorption peak, domain structure, optical homogeneity

CLC Number:

TU Xiao-Niu, ZHENG Yan-Qing, CHEN Hui, KONG Hai-Kuan, XIN Jun, ZENG Yi-Ming, SHI Er-Wei. Growth and Characterization of High Homogeneity Heavily MgO-doped Lithium Niobate Crystals[J]. Journal of Inorganic Materials, 2010, 25(12): 1257-1262.

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Growth and Characterization of High Homogeneity Heavily MgO-doped Lithium Niobate Crystals

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