Design and analysis of PCF based arrayed waveguide grating Demux for optical network

In this paper we propose a AWG Demux which uses highly dispersive PCF instead of array of waveguides as in the conventional AWG. The PCF used here offers a chromatic dispersion value of about −4200 ps/nm/km around 1.55 µm wavelength region and a full width at half maximum (FWHM) of 40 nm. A dual concentric core PCF is used wherein, the structure with central and outer doped cores behaves like a directional coupler. Modal field redistribution between the cores causes the effective refractive index to change rapidly with wavelength thus enabling the separation of wavelength.