A multilayered waveguide holographic read-only memory is a promising candidate for the next generation of optical data storage systems. We improved the data density of the memory by using a multiplexing method with a set of orthogonal optical masks. We multiplexed as many as nine images into one waveguide hologram, and all the observed images had negligible cross talk. This made it possible to achieve a ninefold increase in data density. We provide experimental results for both metallic and liquid-crystal masks.
© 2003 Optical Society of America
Tadayuki Imai, Takashi Kurihara, Shogo Yagi, Yoshiaki Kurokawa, Masahiro Endo, and Takaya Tanabe, "Orthogonal Aperture Multiplexing for Multilayered Waveguide Holographic Read-Only Memories," Appl. Opt. 42, 7085-7092 (2003)