Photorefractive nondestructive memory with Kitty-type conjugator

Hisatoshi Funakoshi; Atsushi Okamoto

doi:10.1117/12.517017

8 August 2003 Photorefractive nondestructive memory with Kitty-type conjugator

Proceedings Volume 5123, Advanced Optical Devices, Technologies, and Medical Applications; (2003) https://doi.org/10.1117/12.517017
Event: 2003 Chapter books, 2003, Bellingham, WA, United States

Abstract

In this report, we propose a photorefractive (PR) nondestructive memory with a Kitty-type phase conjugate mirror (Kitty PCM). Nondestructive readout without any fixing technique and high quality image rewriting can be achieved in this memory. An optical feedback circuit including a Kitty PCM is added on to the usual PR memory in the nondestructive reading method. The nondestructive readout means that the recorded data of the dynamic hologram, generally erased by the exposure of the reading beam, is maintained by only all-optical configuration. The nondestructive readout in this memory is achieved by the hologram rewriting effect that is generated by the reillumination of the diffraction beam reflected by a phase conjugate mirror. But a conventional Cat-type self-pumped phase conjugate mirror (Cat SPPCM) has insufficient reflectivity to obtain large feedback rate required for this nondestructive readout. In this report, we calculate and experiment on the phase conjugate reflectivity and the time response property of the Kitty PCM and show it has the advantages of high reflectivity and fast response time. We perform the experiment on our rewritable PR memory using BaTiO₃ crystals and demonstrate the long time reading over 18 minutes is achieved in this memory.

Citation Download Citation

Hisatoshi Funakoshi and Atsushi Okamoto "Photorefractive nondestructive memory with Kitty-type conjugator", Proc. SPIE 5123, Advanced Optical Devices, Technologies, and Medical Applications, (8 August 2003); https://doi.org/10.1117/12.517017

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