Design and Simulate the Demultiplexer using Photonic Crystal Ring Resonator for DWDM System

Abstract In this study, a new four channel de-multiplexer with a ring resonator design is proposed. The bus waveguide and drop waveguide that make up the Ring Resonator are ring-shaped. One bus waveguide and four drop waveguides in the proposed four channel demultiplexer architecture were created utilizing a photonic crystal ring resonator construction. With the resonance wavelengths for each channel in the range of 1552.4nm, 1553.2nm, 1554.1nm, and 1555.4nm, the suggested demultiplexer average quality factor was 7870.90, and its average transmission efficiency was 98.67%. The demultiplexer was created with a 0.8nm narrow channel spacing and a -15dB to -25dB crosstalk range. The proposed ring resonator structure is made of silicon, which has a refractive index of 3.47, a center wavelength ranges of 1550 nm, and a lattice constant that varies with the radius range of 540 nm. To examine the performance, one can simulate the suggested demultiplexer structure using the FDTD approach. The proposed project's 198.7 µm2 footprint is appropriate for DWDM applications.