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

Polarization and temporal processing of information using long-lived stimulated photon echo

Alexey I. Kalachev, Самарцев Виталий Владимирович, Leonid A. Nefediev

Published May 10, 1996• 1 citation
Publisher

Abstract

The possible applications of polarization and temporal peculiarities of long-lived stimulated photon echo in LaF3:Pr3+ were analyzed. The influence of the excited pulses polarization on time-profile of LSPE was considered. It's discussed the possibility of using time-polarization processing of information in systems of optical memory and optical echo- processors.

DOI
10.1117/12.239466

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The polarization properties of the long-lived stimulated photon echo formed on the transition ja → jb with the atomic levels degenerate in the projections of the angular momenta are studied theoretically. The two particular transitions ja = 1 → jb = 0 and ja = 1 → jb = 1 with degenerate ground state ja = 1 are discussed. For the transitions ja = 1 → jb = 1 the polarizations and areas of the first ('write') and the third ('read') excitation pulses are found when the echo polarization faithfully reproduces the arbitrary polarization of the weak (single-photon) second ('information') pulse, so that this echo scheme may implement the quantum memory for a single-photon polarization qubit, while for the transitions ja = 1 → jb = 0 it is shown, that the echo polarization differs from that of the second pulse at any conditions.