Enhanced nondestructive holographic reconstruction

Details Enhanced nondestructive holographic reconstruction Enhanced nondestructive holographic reconstruction

1987-12-30

1990-09-04

Arnold, Bruce Y.

350320, 350389, G02F 101, G03H 104

Patent

active

049539248

ABSTRACT:
A method for promoting enhanced nondestructive reconstruction of holograms recorded in photorefractive media involves control of the polarization states of the reconstruction beam and the recording beams, control of the cummulative recording energy, and use of a relatively high external field applied across the media during recording which is subsequently reduced during reconstruction. The resulting reconstruction history characteristics are selectively tailored by adjusting the polarization and intensity of the reconstruction beam, the recording geometry, and the applied voltage during reconstruction and recording, and various other parameters. In general, the reconstruction efficiency starts at a relatively high level, initially reduces, and then subsequently grows above the starting value, and can be made substantially nondestructive over a typical reconstruction cycle, with erasure times exceeding forty-five minutes.

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Staebler, D. L., et al., "Multiple Storage and Erasure of Fixed Holograms in Fe-Doped LiNbO.sub.3 ", Applied Physics Letters, vol. 26, No, 4, Feb. 15, 1975, pp. 182-184.
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