Photon echo from small-area exciting pulses

I. V. Evseev, V. M. Ermachenko

I. V. Evseev, V. M. Ermachenko

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

Igor V. Yevseyev, Решетов Владимир Александрович

With regard to the depolarizing collisions the polarization properties of the photon echo formed by two exciting pulses linearly polarized at an angle ψ to each other with arbitrary values of their areas and arbitrary ratios of the durations and the time of reversible Doppler relaxation are obtained. The case of the small area of the first exciting pulse is examined. It is shown that the polarization properties of the photon echo can be described by equations obtained in the limit of small areas for both the first and the second exciting pulses up to the area of the second exciting pulse of the order of unity.

Vladimir Finkelstein, P. R. Berman

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.