S. Kamoun et al., LINEAR AND NONLINEAR-OPTICAL PROPERTIES OF N-DIETHYLENDIAMMONIUM MONOHYDROGENMONOPHOSPHATE DIHYDRATE, Solid state communications, 94(11), 1995, pp. 893-897
NH3(CH2)(2)NH(CH2)(2)NH3 HPO4 2H(2)O an organic phosphate crystal with
application in quadratic nonlinear optics, has been characterized in
terms of refractive indices. AH collinear phase-matching (P.M) configu
rations in the principal planes for second harmonic generation (S.H.G)
are subsequently identified. This compound present two types (I and I
I) of collinear phase-matching configurations for three-wave mixing in
quadratic nonlinear interactions, corresponding to different polariza
tion configurations.