Abstract

The stimulated photon echo is a four-wave mixing process where the input pulses are separated in time. This leads to an inherent ability to memorise the temporal shape of the contributing excitation pulses. The output of the process can be expressed as a product of the Fourier transforms of the input pulses. Thus it is also possible to carry out time-domain signal processing of these pulses. By controlling the frequency, phase, and amplitude and by choosing an appropriate timing of the pulses, one can perform all-optical correlation/convolution, time reversing, temporal compression/expansion, and Boolean operations like AND, OR, and NOT.

© 1994 IEEE