Abstract

Two horizontally polarized coherent beams, A₁ and A₂, from a He:Ne laser cross in an electrically poled BaTiO₃ crystal. The crystal is adjusted so that at least one of the two beams pulsates/oscillates in self-pumping. Energy transfer between the two beams is analyzed with the help of four simultaneously recorded signals, for both individual pumping and simultaneous pumping, under different conditions. A beam (e.g., A₁) can be diffracted in the directions of (1) the transmit ted beam (A_2T) of the second beam, (2) the phase conjugate (A^*₂) of the second beam, and (3) the phase conjugate (A^*₁) of its own beam. Also, the fanning of this beam (A₁) may help the other (A₂) in its self-pumping. The relative importance of these factors depends the angles of incidence, the point of entry with respect to the crystal edge, and the orientation of the optic axis of the crystal. A study of the energy transfer from these parametric changes and the influence of the pulsations/oscillations on this transfer will be presented.

© 1990 Optical Society of America