Multiplexing Nonvolatile Holograms in LiNbO₃:Cu:Ce Crystals

A practical experimental system for two-center recording by angular multiplexing and 90°geometry is designed with red and blue light. The erasure mechanism of lithium niobate crystals doubly doped with copper and cerium for two-center recording is discussed and a modified decremental recording schedule for angular multiplexing is proposed subsequently. Finally, 50 nonvolatile holograms with almost the same diffraction efficiency are recorded.