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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Long-lived photon echo: graphical method of calculation

Alexei A. Kalachev, Самарцев Виталий Владимирович, D. D. Vlasova

Published Apr 20, 2004• 0 citations
Publisher

Abstract

The paper is devoted to the phenomenon of a long-lived photon echo (LLPE). The graphical method of calculation of optical echo signals in multilevel systems is developed. Using developed method the formation of LLPE signals in Van Vleck paramagnets is investigated.
DOI
10.1117/12.562199

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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.