Role of Boundary Conditions in Phase Conjugation by Degenerate Four-Wave Mixing
In recent years the phenomenon of degenerate four-wave mixing (DFWM) has become a subject of considerable interest due to its applications to optical aberration correction, signal processing, and spectroscopy (for review of DFWM and other optical phase-conjugation processes see Ref.1–3). As is known4, 5, the basic theory of phase conjugation by the DFWM for the fast responding “Kerr-like” media and for the steady state makes use of the coupled first order differential equations. These equations have been derived under the assumptions of the adiabatic approximation and the pump-power non-depletion. Although many generalizations and modifications of the basic system of equations have been proposed, an approach in which the adiabatic approximation is not assumed has not yet been considered.
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