Close attention has been focused on the phenomenon of the rotation of a wave front (RWF) which arises upon nonlinear interaction of light with matter in connection with the broad possibilities for its practical applications in contemporary laser technology. However, one can note the low energy efficiency of this phenomenon from the results of experimental investigations known up to this time in the various schemes for producing RWF. One of the interesting solutions of this problem is the accomplishment of RWF with four-photon mixing (FPM) in amplifying media. This process was first discussed theoretically in [i]. The experimental results [2] showed that in a multipass amplifier the "rotated" wave can exceed by several times the level of the incident wave.