We investigate UV photorefraction in Mg-doped LiNbO<sub>3</sub> crystals. Strong UV photorefraction is achieved in highly Mg-doped LiNbO<sub>3</sub> crystals with high two-wave mixing gain, fast response, and low noise. It is also demonstrated experimentally that so-called damage-resistant dopants such as Mg are damage resistant only in the visible and that they will enhance photorefraction in the UV.
© 2000 Optical Society of America
(140.3330) Lasers and laser optics : Laser damage
(160.5320) Materials : Photorefractive materials
(190.5330) Nonlinear optics : Photorefractive optics
(260.7190) Physical optics : Ultraviolet
Jingjun Xu, Guangyin Zhang, Feifei Li, Xinzheng Zhang, Qian Sun, Simin Liu, Feng Song, Yongfa Kong, Xiaojun Chen, Haijun Qiao, Jianghong Yao, and Zhao Lijuan, "Enhancement of ultraviolet photorefraction in highly magnesium-doped lithium niobate crystals," Opt. Lett. 25, 129-131 (2000)