Influence of the Li/Nb ratio on crystal growth and photorefractive properties of Ce:Mn:LiNbO3 crystal

Wei Zheng; Bo Liu; Jiancong Bi; Yuheng Xu

doi:10.1117/12.574888

20 January 2005 Influence of the Li/Nb ratio on crystal growth and photorefractive properties of Ce:Mn:LiNbO₃ crystal

Wei Zheng, Bo Liu, Jiancong Bi, Yuheng Xu

Proceedings Volume 5633, Advanced Materials and Devices for Sensing and Imaging II; (2005) https://doi.org/10.1117/12.574888
Event: Photonics Asia, 2004, Beijing, China

Abstract

Ce:Mn:LiNbO3 crystals with different Li/Nb mole ratios in the melts (Li/Nb = 0.94, 1.05, 1.20, 1.38) have been grown for the first time. The growing conditions varied greatly on the Li/Nb ratio. With the increase of Li/Nb ratio in crystals, the Curie temperature raises while the melting point drops. The infrared spectra of crystals were measured. The exponential gain coefficient, response time and diffraction efficiency were measured by two wave coupling experiments with He-Ne laser (632.8nm). The near-stoichiometric Ce:Mn:LiNbO₃ crystal grown from the melt with Li/Nb ratio 1.38 exhibits the largest exponential gain coefficient (33cm^-1) and shortest response time (19s), which is attributed to its larger photoconduction. Combined with spectrum analysis we deduced that the increase of photoconduction may be due to the decrease of anti-site (Nb_Li)⁴⁺in crystals.

Citation Download Citation

Wei Zheng, Bo Liu, Jiancong Bi, and Yuheng Xu "Influence of the Li/Nb ratio on crystal growth and photorefractive properties of Ce:Mn:LiNbO₃ crystal", Proc. SPIE 5633, Advanced Materials and Devices for Sensing and Imaging II, (20 January 2005); https://doi.org/10.1117/12.574888

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