Effect of exciting-pulse shape on photon-echo polarization

I. V. Evseev, V. M. Ermachenko

Alexander V. Evseev, I. V. Evseev, V. M. Ermachenko

Igor V. Yevseyev

Igor V. Yevseyev, Valery M. Yermachenko, Решетов Владимир Александрович

In the limit of small exciting light-pulse areas the amplitude and polarization of the tri-level photon echo in gases formed by the exciting pulses with arbitrary shapes are obtained. It is shown that the dependence of the tri-level photon echo signal on the mutual orientation of the exciting pulse polarization vectors may be used to determine the optical coherence-matrix relaxation characteristics for an optically forbidden transition. The conditions under which a tri-level photon echo pulse repeats the shape of each of the exciting pulses are defined. It is proved that the tri-level photon-echo polarization properties do not depend on the shapes of the exciting pulses, either for small light-pulse areas or for the tri-level echo formation on narrow spectral lines.

Igor V. Yevseyev, Решетов Владимир Александрович

An expression for the electric field intensity of the photon echo formed in a gaseous medium on transition between two degenerate levels under the action of two linearly polarized exciting pulses is derived. Using the obtained relationships the effect of photon-echo shape locking is analysed for a square shaped second (‘locking’) exciting pulse as well as for the case of a smooth envelope of the hyperbolic secant form. It is shown that in degenerate systems as well as in non-degenerate ones, photon-echo shape locking takes place if the shape of the ‘locking’ pulse is square and does not take place in the case of a smooth envelope.

A. I. Alekseev, Ashat M. Basharov, V N Beloborodov