IMAGE-FORMATION IN-PHASE CONJUGATION WITH LARGE WAVELENGTH CONVERSION

The imaging properties of wave-front reversal with nonlinear probe dep endence and large frequency conversion are investigated. A calculation is made of the field generated by an arbitrary probe field distributi on. It is found that a phase-matching problem, similar to that in nond egenerate four-wave mixing, limits the spatial resolution. Lensless im aging is shown to be impossible because of the nonlinearity of the pro cess. The use of the process as a frequency-converting mirror in a con ventional imaging system is studied with diffraction theory. Aberratio ns in such a system cannot be compensated by a phase-conjugate mirror with large frequency conversion.