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Spectral Hole-Burning and Related Spectroscopies: Science and Applications

Long-Lived Photon Echo in Van-Vleck Paramagnetics: Physics and Optical Storage

Vitali V. Samartsev

Published Jan 1, 1994• 0 citations
Publisher

Abstract

The results of the own experimental and theoretical investigations of the long-lived photon echo (LPE) are reported. The special type of the resonant media, named as Van-Vleck paramagnetics (for example, LaF3:Pr3+), is used in our experiments. The physical mechanisms of LPE-forming are studied in these experiments. The various problems of the optical storage, using LPE, are discussed.

DOI
10.1364/shbs.1994.wd61

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The results of the own experimental and theoretical investigations of the long-lived photon echo (LPE) are reported. The special type of the resonant media, named as Van-Vleck paramagnetics (for example, LaF3:Pr3+), is used in our experiments. The physical mechanisms of LPE-forming are studied in these experiments. The various problems of the optical storage, using LPE, are discussed.
The phenomenon of long-lived photon echo (LPE) has attracted much recent attention [1-6]. This interest stems from the possible application of this phenomenon in high-capacity optical memory devices (OMD) [7-8]. At present many fundamental problems crucial to the construction of an operating device are solved. The possibility of multiple information read out without refresh is shown theoretically [9] and experimentally [5,10]. Resonant media with storage times of the order of tens of hours and more have been investigated [4,5].Nevertheless, up to now it has not been clear whether it is possible to selectively erase information in an arbitrary memory cell of OMD. It was pointed out for the first time in Ref. [ 11] that it is in principle possible to erase information with random access using LPE signal suppression. We investigate the effect of LPE signal suppression in this work in more detail, and propose a simple technique for random access information erasing.