Optical phase conjugation by degenerate four-wave mixing in tetraphenylporphines

Abstract

Systamatic and detailed studies of thermally induced degenerate four-wave mixing (DFWM) in metal-substituted tretraphenylporphines and four different solvents have been carried out to understand the physics of the process and to optimize the parameters for maximum efficiency. These studies include the effect of the angle of interaction and coherence length, the roles played by different solvent parameters, the absorption coefficients and the quantum efficiencies of different dye-solvent combinations, the effect of reverse saturable absorption on the efficiency of the system. the Intensity dependence, the wavelength dependence and finally the phase conjugate nature of the signal.