Abstract
This work presents theoretical and experimental studies of the processes of light field transformations upon frequency-nondegenerate fourwave mixing (NFWM) in a nonlinear Fabry-Perot interferometer (FPI). The principal aims are the development of a theory for intracavity four-wave mixing in complex molecular media in conditions of scattering from dynamic gratings and resonator feedback; determination of a mechanism of light field transformations in dynamic holograms, and also by nonlinear interferometers; working out and introduction of novel nonlinear-optical methods to control the characteristics of light beams. High diffraction efficiency (up to 13.5%) with simultaneous infrared-to-visible frequency conversion of coherent images has been experimentally obtained by intracavity NFWM.
Highlights
Nonlinear Fabry-Perot interferometer (FPI) are promising devices to study basic physical phenomena, finding wide application in all-optical communication systems
For theoretical description of typical experimental situations we have used a round-trip model of a nonlinear interferometer adapted to the geometry of nondegenerate fourwave mixing (NFWM), that can be realized in the scheme of oblique incidence of pump, signal and probe beams on front and back mirrors of the cavity
The model for the processes of intracavity NFWM has been applied when analyzing the efficiency of light beam conversion by means of Bragg diffraction from the intracavity dynamic gratings
Summary
Nonlinear FPIs are promising devices to study basic physical phenomena, finding wide application in all-optical communication systems. Their most attractive characteristic is enhancement of the nonlinear dielectric function of a material due to photon confinement within the cavity that may be used, e.g., in dynamic holography [1,2,3]. The theoretical model includes both resonant and thermal nonlinearities of organic dye giving rise to light-induced dynamic gratings of the absorption coefficient and refractive index. The model for the processes of intracavity NFWM has been applied when analyzing the efficiency of light beam conversion by means of Bragg diffraction from the intracavity dynamic gratings. The coherent image frequency conversion has been realized, for the first time to our knowledge, with simultaneous phase-conjugation
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