Nonlinear effects occur whenever the optical fields associated with one or more intense light such as from laser beams propagating in a crystal are large enough to produce polarization fields. This paper describes how the fourth order nonlinear intensity and the corresponding effective refractive index that is intensity dependent can be obtained using Maxwell’s equations. Applications have been elucidated for some uniaxial crystals.
Keywords: Refractive index, Nonlinear effects, Maxwell’s equations, Intensity and uniaxial crystals
Journal of the Nigerian Association of Mathematical Physics, Volume 19 (November, 2011), pp 533 – 542