Ren Liyong, Liu Liren, Liu De'an, Zu Jifeng, Luan Zhu
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O. Box 800-211, Shanghai 201800, China.
Opt Lett. 2004 Jan 15;29(2):186-8. doi: 10.1364/ol.29.000186.
An oscillatory characteristic of diffraction is observed as a result of strong beam coupling in a weakly oxidized LiNbO3:Ce:Cu crystal during the recording step in the production of nonvolatile photorefractive holograms. On this basis the optimal switching time from the recording step to the fixing step for high diffraction of a fixed hologram is studied. It is shown that switching after the first diffraction maximum leads theoretically to fixed diffraction of as much as 100% with a suitable switching time. Both an experimental demonstration and a theoretical simulation are presented.
在非挥发性光折变全息图制作的记录步骤中，由于弱氧化的LiNbO₃:Ce:Cu晶体中的强光束耦合，观察到了衍射的振荡特性。在此基础上，研究了从记录步骤到固定步骤的最佳切换时间，以实现固定全息图的高衍射。结果表明，在第一个衍射最大值之后进行切换，理论上在合适的切换时间下可实现高达100%的固定衍射。同时给出了实验演示和理论模拟。
