title: Selective erasure of speckle-multiplexed holograms by use of a double Mach-Zehnder interferometric arrangement.
abstract: A novel method to selectively erase and update speckle-multiplexed holograms in photorefractive crystals by use of a double Mach-Zehnder (DMZ) interferometric arrangement is presented. The DMZ arrangement automatically produces a pair of pi-phase-shifted interference patterns used for holographic recording, erasure, and update operations with a fairly simple optical configuration that consists of a commonly used dielectric multilayer beam splitter and two mirrors. The recording and the erasure conditions required for erasing a photorefractive hologram quickly and completely are discussed by calculating the temporal property of the hologram buildup and decay using the time-dependent coupled-wave equations. An experiment is also performed, in which arbitrary holograms in speckle-multiplexed holograms are selectively erased and updated with the simple DMZ optical configuration.
authors.affiliation: Department of Electronics Engineering and Computer Science, Fukuoka University, Japan. bunsen@fukuoka-u.ac.jp
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Bunsen
authors.forename: Hirosuke
authors.initials: H
authors.lastname: Furuta
authors.forename: Atsushi
authors.initials: A
authors.lastname: Okamoto