Design of Channel Drop Filter using dual L defected hexagonal Photonic Crystal Ring Resonator for CWDM systems

Abstract

In this paper, Channel Drop Filter (CDF) with dual L defected hexagonal Photonic Crystal Ring Resonator (PCRR) is designed for Coarse Wavelength Division Multiplexing (CWDM) systems. In the proposed structure the outer rods are arranged in hexagon and the inner rods are removed in L arrangement for introducing the defects. The scatter rods are also utilized used for controlling the phase excitation. Electromagnetic wave propagation and the photonic band gap are obtained using plane wave expansion and opti Finite Difference Time Domain (FDTD) method. The resonant wavelength for the proposed structure is centered at 1550nm.