Generalities on Nonlinearities in Silica

This lecture covers the generalities on nonlinearities in silica, including the material response to an optical wave, dispersion, loss, and nonlinear effective length and area. It explains the optical Kerr effect, stimulated scatterings, and sensing using stimulated scatterings. The instructor discusses the physical origin of the optical Kerr effect, the Clausius-Mossotti relation, and the electrostriction effect. The lecture also delves into the 3rd order nonlinearity, nonlinear coefficient, and the concept of nonlinear effective length and area in optical fibres.