Abstract
In this paper an 8-channel demultiplexer has been proposed and simulated based on 2D photonic crystals for WDM and DWDM applications. The obtained quality factors are the best according to litterator until now and are between 4430 and 10363.33. The average transmission efficiency and average bandwidth are 94.31% and 0.239 nm respectively. Crosstalk values are low and range from − 18 dB to − 65.5 dB. Ring resonators as the basic structure for the design of the final demultiplexer structure are used to separate the optical waves. The proposed demultiplexer is a square array of dielectric rods of gallium arsenic GaAs with a refractive index of 3.37, operates around 1.55 µm. The designed device has a lattice constant equal to 610 nm and a fill factor equal to 0.2. To simulate our structure, we used COMSOL Multiphysics based on the finite element method. The proposed demultiplexer has a narrow average spacing of 1 nm with a small footprint of 461.76 µm2 that can be exploited in optical integrated circuits.
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Bachir, R., Hadjira, B. & Mehadji, A. Design of a 8-channel demultiplexer with ultra highly quality factor and low crosstalk for DWDM applications. Opt Quant Electron 53, 363 (2021). https://doi.org/10.1007/s11082-021-03018-3
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DOI: https://doi.org/10.1007/s11082-021-03018-3