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Acta Physica Sinica

HOLOGRAPHIC DETECTION OF PHOTON-GATED SPECTRAL HOLES AND IMAGE STORAGE

Zhao Lizeng, MA XIAO, Yong Qin, Zhenzhong Lu, NIE YU-XIN, Duoyuan Wang, HU MIN-XUE, (1)中国科学院感光化学研究所; (2)中国科学院物理研究所

Published Jan 1, 1997• 1 citation
Publisher

Abstract

Holographic photon-gated spectral hole burning and image storage were performed in meso-phenyl-tetrabenzoporphyrinato-zinc/aromatic cyanide systems.In holographic spectral hole burning,the signal to noise ratio is improved considerably.Based on photon-gated persistent spectral hole burning,photon-gated frequency-selective multiple images were recorded and recalled successfully as holograms in the material.

DOI
10.7498/aps.46.1487

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Holographic photon-gated spectral hole burning and image storage were performed in meso-phenyl-tetrabenzoporphyrinato-zinc/aromatic cyanide systems.In holographic spectral hole burning,the signal to noise ratio is improved considerably.Based on photon-gated persistent spectral hole burning,photon-gated frequency-selective multiple images were recorded and recalled successfully as holograms in the material.
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We introduce a method of polarization spectroscopy into photon-gated persistent spectral hole burning, which results in considerable improvement in the signal-to-background ratio. Fifty multiple spectral holes burnt into meso-phenyl-tetrabenzoporphyrinato-zinc/aromatic cyanide/poly(methyl methacrylate) were clearly detected by this measurement technique. We developed a simplified model to account for the hole shapes. Background birefringence combined with refractive dispersion is thought to play a key role in the generation of asymmetric line shapes.
The use of holography is attractive for optical data storage due to its poten­tial for implementing page oriented data storage systems. However, multiplexed recording using Bragg selective materials has not provided a large enough stor­age capability to justify the expense of these systems. Persistent spectral hole burning holography allows multiplexed recording using much smaller wavelength separations between the holograms, and hence dramatically increases the storage capacity possible in holographic memory systems [1]. A comparison between the wavelength selectivity obtained for transmission gratings recorded using hole burning in a dye doped polymer film versus Bragg selectivity in a 1 cm thick iron-doped lithium niobate crystal is shown in Fig. (1).