Khachik Hovhannisyan

• Doctor of Theology
• Catholic University of Louvain

We present the results of theoretical study of generation of spectral supercontinuum by an extremely short femtosecond laser pulse with the central wavelength corresponding to zero dispersion, propagating in a single-mode fiber with shifted dispersion characteristics. High-order nonlinear Schrödinger equation (HONSE) is considered with higher-order...

We present the results of theoretical study of generation of difference frequency radiation in interaction of few-cycle laser pulse with a GaAs thin crystal. 2D numerical time-integration of system of nonlinear Maxwell equations for the TEy mode has been performed by the finite-difference method. We consider the interaction of linearly-polarized pu...

Results of the wavelet analysis of an extremely short femtosecond pulse propagating in a single-mode optical fiber with a shifted dispersion characteristic are described. The advantages of wavelet analysis as compared with Wigner analysis are shown. In particular, wavelet analysis allows improving the spectral resolution of the studied pulse in the...

We derive a system of coupled modified Korteweg-de Vries equations in the approximation of unidirectional waves which describe the evolution of electric fields of mutually-orthogonal linearly polarized laser pulses with duration of several optical oscillations in a nonlinear crystal with quadratic nonlinearity in the regime of weakly expressed chr...

We consider the effect of Raman inertial response of a medium on the stability of a first-order femtosecond soliton. Numerical solution to the high-order nonlinear Schrödinger equation, with the complex Raman term, describing propagation of a femtosecond optical soliton in a single-mode fiber, is obtained. It is shown that a soliton solution of the...