A practical method of suppressing photovoltaic noise in Fe:LiNbO3

Yuhong Wan; Lei Zhang; Guoqing Liu; Shiquan Tao

doi:10.1117/12.573944

3 January 2005 A practical method of suppressing photovoltaic noise in Fe:LiNbO₃

Yuhong Wan, Lei Zhang, Guoqing Liu, Shiquan Tao

Proceedings Volume 5643, Advances in Optical Data Storage Technology; (2005) https://doi.org/10.1117/12.573944
Event: Photonics Asia, 2004, Beijing, China

Abstract

A practical method of suppressing photovoltaic noise in photorefractive iron doped lithium niobate crystals (Fe:LiNbO₃) is proposed, in which the surfaces of the crystal are coated with transparent electric-conductive material (In₂O₃ doped stannum, ITO) forcing the crystal to operate in a short-circuit mode. In order to assess the validity of this method, the loss of signal-to-noise ratio (LSNR) was used to evaluate the quality of images formed directly through uncoated and ITO- coated crystals respectively. Several iron doped lithium niobate crystals were measured. The main experimental results showed that the scattering noise decreased obviously in the ITO-coated crystals, suggesting that the short-circuit operation suppressed photovoltaic noise effectively. Furthermore, it is found that the dynamic range (M#) of the crystals increased after they were coated with ITO. The results of experiments on multiple hologram recordings in the uncoated and ITO-coated Fe:LiNbO₃ crystal verified the improvement of M# well.

Citation Download Citation

Yuhong Wan, Lei Zhang, Guoqing Liu, and Shiquan Tao "A practical method of suppressing photovoltaic noise in Fe:LiNbO₃", Proc. SPIE 5643, Advances in Optical Data Storage Technology, (3 January 2005); https://doi.org/10.1117/12.573944

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