Nonlinear optical properties of molecular crystals of metatolylenediamine

An investigation was made of the absorption spectra of polarized light, dispersion of principal refractive indices, and collinear phase matching in the generation of the second harmonic of λ = 1.06 μ laser radiation in molecular crystals of meta-tolylenediamine. The relative values of all the independent components of the quadratic susceptibility tensor were determined for these crystals and the value of the second-harmonic conversion coefficient was found. It was concluded that meta-tolylenediamine crystals were promising frequency doublers.