Designing of Photonic Crystal Ring Resonator Based ADF Filter for ITU-T G.694.2 CWDM Systems

In this paper two dimensional photonic crystal ring resonator based add/drop filter is proposed. The layout of the proposed filter includes bus waveguide and drop waveguide which is coupled with the quasi-square resonator. The filter has a square lattice with rods suspended in air type structure. The add/drop filter has 1500 nm add (off resonance) wavelength and 1567 nm drop (on resonance) wavelength with drop efficiency 95%. This type of filter is mainly used in CWDM system. The size of the filter is very compact 11.1*10 µm2. The designed filter has quality factor of 3134. The layout of filter is designed using a layout designer tool. OptiFDTD software is used for the designing and simulation of filter.