Real-Time Optical Phase Conjugation for Scattering Compensation in Turbid Media

Abstract

The possibility of scattering suppression effect for biological tissues based on the implementation of optical phase conjugation via four-wave mixing in a nonlinear medium has been analyzed. The process of short light pulse propagation through highly scattering media is modeled based on Finite-Difference Time-Domain calculations of Maxwell’s equations. The model for optical phase conjugation is derived based on coupled-mode equations for degenerate four-wave mixing in dye solutions. The scheme is experimentally analyzed for typical parameters of laser light beams and biological tissues in visible region of spectrum.