Time reversal of optical pulses by four-wave mixing.
Four-wave mixing with optical pulses is considered analytically. It is shown that, whereas true time reversal of an amplitude pulse is not possible with continuous-wave pumping, this can be achieved by short-pulse pumping of a long, narrow, nonlinear medium, although time-dependent phase variations are not time reversed.
Miller
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Department of Physics, Heriot-Watt University, Riccarton, Currie, Edinburgh EH144 AS, Great Britain.