All optical 8-channel wavelength division demultiplexer based on photonic crystal ring resonators

In this paper we are going to propose an 8 channel all optical wavelength division demultiplexer. For this purpose first of all we will proposed and design a channel drop filter based on photonic crystal ring resonator. Then generalize the proposed filter into an 8 channel optical demultiplexer. The obtained desmultiplxer has average band width about 2.5 nm. The minimum transmission efficiency is about 79% and the crosstalk values vary between -12 dB and -40 dB.