Spectroscopy of Nonlinear Optical Activity in Crystals in the Niger-Delta Region

2010 Journal of Applied Sciences Research   unpublished
In an optically active medium, the plane of light polarization rotates through an angle proportional to the sample thickness. A strong light wave changes natural gyrotropy or in a nongyrotropic medium, experiences a self-induced rotation (non-linear optical activity, NOA). This article is devoted to the use of this phenomenon in spectroscopy of crystals in the Niger-Delta region.