Highly nonlinear enhanced-core photonic crystal fiber with low dispersion for wavelength conversion based on four-wave mixing

Abstract

In this paper, a new structure of highly nonlinear low dispersion photonic crystal fiber (HN-PCF) by elliptical concentration of GeO₂ in the PCF core has been proposed. Using finite difference time domain (FDTD) method, we have analyzed the dispersion properties and effective mode area in the HN-PCF. Simulative results show that the dispersion variation is within±0.65 ps/(nm∙km) in C-band, especially 0.24 ps/(nm∙km) in 1.55 μm wavelength. Effective area and nonlinear coefficient are 1.764 μm² and 72.6 W^-1∙km^-1 respectively at 1.55 μm wavelength. The proposed PCF demonstrates high nonlinear coefficient, ultra small effective mode area and nearly-zero flattened dispersion characteristics over C-band, which can have important application in all-optical wavelength conversion based on four wave mixing (FWM).

Keywords

dispersion / effective area / four wave mixing (FWM) / wavelength conversion / photonic crystal fiber (PCF)

RIGHTS & PERMISSIONS

Higher Education Press and Springer-Verlag Berlin Heidelberg