Bragg three-wave mixing for optical wave-front reversal

N. F. Andreev, V. I. Bespalov, M. A. Dvoretskii +1 more

V.N. Blaschuk, A. V. Mamaev, Nikolai F. Pilipetsky +2 more

N. S. Shiren

It is shown that backward-wave photon echoes may be generated and the echo wave fronts are time reversed with respect to the first pulse of either a two- or three-pulse input sequence. Some comparisons are made with the four-wave degenerate parametric technique for generating time-reversed wave fronts.

A. A. Sevenyuk, А. В. Сухов

D. Grischkowsky, N. S. Shiren, R. J. Bennett

Time-reversed optical wave fronts were generated by degenerate four-wave mixing in rubidium vapor. An extremely large and resonantly enhanced electronic nonlinearity, described by the adiabatic following (AF) model, was responsible for the mixing. The intensity dependence of the AF nonlinear susceptibility was shown to explain the observed reduction in conversion efficiency at high pumping intensities.

Vladimir A. Shcheglov, A. A. Stepanov, S. V. Troshchenkov