An Optimized Technique For Developing Optical Band Pass Filter
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Abstract
In this paper we have introduced an innovative method for designing a one dimensional photonic crystal (1D PhC) based Optical Band Pass Filter (OBPF) using the Differential Evolution (DE) algorithm. These filters are essential in optical communication systems because of their ability to control light propagation. The DE algorithm efficiently optimizes the PhC structure to achieve the desired optical band pass characteristics and simplifying the design process. The OBPFs are made of multiple dielectric layers with varying thicknesses and refractive indices to enable high transmission at specific wavelengths and low transmission elsewhere. Optimization helps to find the optimal thickness and refractive index. MATLAB implementation shows encouraging results with high transmittance (99.2214%) and a narrow full width at half maximum (FWHM) of $0.6 ~\mathrm{n m}$. The experimental results demonstrate the superiority of this approach over the existing well-known traditional methods.