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Nonlinear pulse propagation in chalcogenide As 2 Se 3 glass photonic crystal fiber using RK4IP method

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Abstract

Pulse propagation through chalcogenide As2Se3 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 (γ) in As2Se3 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 As2Se3 PCF. The numerically obtained value of soliton collision length (Lcol=51.3LD) using the RK4IP method is found to be in good agreement with the theoretical value of soliton collision length (Lcol=51.408LD) obtained from inverse scattering transform method, thus providing a verification of the RK4IP accuracy in solving generalized nonlinear schrödinger equation (GLNSE). We also evaluate and apply the value of wavelength for distortionless (LNL=LD) propagation of the soliton pulse.

© 2011 Optical Society of America

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