Elimination of distortions by phase conjugation without losses or gains
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It is shown on the basis of scalar wave theory that complete cancellation of distortion effects by the technique of phase conjugation will be achieved under the following circumstances: The scatterer is non-absorbing, the conjugate wave is generated without losses or gains at an infinite phase-conjugate mirror and the effects of the evanescent waves outside the scatterer are negligible. The analysis is carried out to all orders of perturbation theory and is based on a new integral-equation formulation that involves a Green's function which takes into account the presence of the phase-conjugate mirror. 1982.