Dispersion of the quadratic optical susceptibility of meta-toluylenediamine crystals

An investigation was made of the dispersion (wavelength dependences) of all independent components of the quadratic susceptibility tensor of molecular crystals of meta-toluylenediamine on approach of the sumfrequency wavelength to the edge of the absorption band of these crystals. The nature of the dispersion of the tensor components agreed with the main ideas of the oscillator model and it ensured effective addition of frequencies in the converted-radiation wavelength range 347–532 nm.