Compressing waves in plasma

The most compelling application in compressing waves in plasma lies in achieving the next generation of laser intensities.  Light waves may be ompressed in time through nonlinear interactions with other light waves, thereby intensifying the waves.  A variety of techniques have been proposed to achieve the amplification of the desired signal, while tuning out unwanted amplifications. Waves can also be compressed in plasma through adiabatic changes in time of the density of the plasma.  Here the immediate applications are less apparent, but for unrelated reasons there are very large facilities now being built or already operating specifically to compress plasma to incredible pressures.  The waves embedded in the plasma might then exhibit certain fascinating phenomena.