Modulational Instability: Ultrashort Pulse and Supercontinuum Generation

In this talk, I would like to discuss the role of modulational Instability (MI) in nonlinear optical fiber. Considering different types of nonlinear Schrödinger equation with different linear and nonlinear optical effects, I will discuss the role of MI and generation of solitons. In particular, I will discuss the side band generation in nonlinear optical fiber and controlling of these side bands. The theoretical investigation of nonlinear femtosecond pulse propagation in liquid-core photonic crystal fiber will be discussed in detail. Finally, I will discuss supercontinuum generation through MI induced spectral broadening process. The effect of saturable nonlinearity and slow nonlinearity due to reorientation contribution of liquid molecules on broadband supercontinuum generation in the femtosecond regime will be discussed using an appropriately modified nonlinear Schrödinger equation.