Nonlinear pulse propagation in chalcogenide As_(2)Se_(3) glass photonic crystal fiber using RK4IP method

摘要

Pulse propagation through chalcogenide As_(2)Se_(3) glass photonic crystal fiber (PCF) is numerically investigated using fourth-order Runge-Kutta in the interaction picture (RK4IP) method. The fully vectorial effective index method (FVEIM) is used to calculate the variation of effective refractive index, effective area, dispersion, and nonlinear coefficient (gamma) in As_(2)Se_(3) PCF with wavelength for different values of pitch and air hole size. The RK4IP method is used to demonstrate the soliton propagation, self-phase modulation (SPM), soliton collision and cross phase modulation (XPM) in the designed As_(2)Se_(3) PCF. The numerically obtained value of soliton collision length (L_(col) velence 51.3L_(D)) using the RK4IP method is found to be in good agreement with the theoretical value of soliton collision length (L_(col) velence 51.408L_(D)) obtained from inverse scattering transform method, thus providing a verification of the RK4IP accuracy in solving generalized nonlinear schrodinger equation (GLNSE). We also evaluate and apply the value of wavelength for distortionless (L_(NL) velence L_(D)) propagation of the soliton pulse.