Data for: Formation of ordered defect structures in lithium niobate crystals of different chemical composition at non-equilibrium processes of different nature

Photorefractive effect in a crystal LiNbO3stoich was excited by a 532 nm band of a MLL-100 Y:Al-garnet laser. The image was registered by a digital photo camera SONY NEX-F3 on the exit face of a crystal. In order to avoid an over-illumination of the camera matrix, the image center (the laser spot) was covered by a light-tight shield of black paper. Photorefractive effect caused appearance of laser-induced defects around the laser beam. The refractive index in these defects is changed.光折变效应（photorefractive effect）在化学计量比铌酸锂（LiNbO₃）晶体中的激发实验采用MLL-100型钇铝石榴石（Y:Al-garnet）激光器的532纳米波段激光完成。借助索尼（SONY）NEX-F3数码相机于晶体出射面采集图像。为防止相机传感器过曝，使用黑色不透光遮光片遮挡了图像中心的激光光斑区域。 光折变效应会在激光光束周围诱导产生激光诱导缺陷，且此类缺陷的折射率会发生改变。