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Proceedings Paper

An Approach To Integrated Waveguide-Hologram Memory
Author(s): Toshiaki Suhara; Hiroshi Nishihara; Jiro Koyama
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Paper Abstract

An approach toward constructing an integrated waveguide-hologram memory is presented. The fundamental unit of the device, which is cascadable for integration, is a combination of a small waveguide hologram and an optical switch of deflection type which enables the selective read-out of the hologram. The waveguide hologram was recorded by using an Arion laser in an amorphous As2S3 (recording layer) / Ti-diffused LiNbO3 (slab waveguide) structure, which was designed for deriving high diffraction efficiency. The stored pictorial information was successfully read out by the it light of a He-Ne laser satisfying the propagation constant matching condition for the aberration-free imaging. The optical switch must be compact and capable of controlling a guided wave having a large width required for reconstructing a two-dimentional image with sufficient resolution. The design considerations are described of an electrooptic TIR switch in which an effective-index gap is formed by high-index cladding to obtain a large separation angle. It was found and experimentally confirmed that the switch has an appropriate performance, although the component size and the switching ratio must be traded off. The detailed imaging and switching characteristics are presented and the feasibility of the memory is discussed.

Paper Details

Date Published: 26 July 1979
PDF: 8 pages
Proc. SPIE 0176, Guided Wave Optical Systems and Devices II, (26 July 1979); doi: 10.1117/12.957218
Show Author Affiliations
Toshiaki Suhara, Osaka University (Japan)
Hiroshi Nishihara, Osaka University (Japan)
Jiro Koyama, Osaka University (Japan)


Published in SPIE Proceedings Vol. 0176:
Guided Wave Optical Systems and Devices II
Elsa M. Garmire, Editor(s)

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