M. Migliardo, QUASI-MONOCHROMATIC WAVE MODULATION IN ANISOTROPIC DIELECTRIC MEDIA, International journal of non-linear mechanics, 30(6), 1995, pp. 879-885
An asymptotic approach is used to describe propagation of electromagne
tic waves through non-linear anisotropic and non-homogeneous dielectri
c media. It is shown that the wave amplitudes satisfy a pair of multid
imensional Schrodinger-like equations.