Dynamics of nonlinear-medium response to transmitted light on four-wave mixing in the field of a short pumping wave

G. N. Karadzhyan

Evgeny N. Bodunov

Konstantin Shcherbin, Grégory Gadret, Hans Rudolf Jauslin +2 more

The slowing down of light pulses is achieved using backward-wave four-wave mixing in a medium with local response. A Bi12TiO20 crystal with an external dc field is used in the experiment as a proof-of-concept material. The delay and shape transformation of output pulses are studied and compared for the transmitted and phase conjugate channels. It is shown that the phase conjugate pulse achieves a longer delay under typical experimental conditions with equal intensities of the pump beams. This advantage of the phase conjugate beam is especially pronounced for short pulses with half-widths smaller than the response time of the medium. The agreement of the experimental results with numerical calculations confirms the validity of the previously developed theoretical model. Analytical solutions are derived for input pulses with triangular shapes.

Yuri V. Rostovtsev

W. W. Rigrod, Robert A. Fisher, B. J. Feldman

Exact solutions for the impulse responses of the phase-conjugate backward wave and of the transmitted forward wave in a nonlinear four-wave mixing medium with a cw undepleted pump are derived from an earlier analysis of active contraflow systems by Bobroff and Haus [J. Appl. Phys. 38, 390 (1967)].

Jean‐Claude Diels, W. -C. Wang, Herbert G. Winful