Projeto de otimização de filtros para sistemas de multiplexação por comprimento de onda em fibras ópticas

Abstract

The optimization of optical filters in wavelength-division multiplexing (WDM) systems in optical fibers is a critical area for the advancement of telecommunications. The efficiency of filters used to separate and direct light signals in optical fibers is essential for high-speed, high-volume data transmission. This field is also important because it has the potential to increase data transmission capacity to meet the growing demand for communication without causing ecological harm, as no material replacement is required for such optimizations. WDM can be implemented with different levels of precision, and due to this increasing demand, there have been growing efforts to advance and refine this technique. One example is ultra-dense wavelength-division multiplexing (UDWDM), an evolution of the already refined dense wavelength-division multiplexing (DWDM). These refinements require ever-greater precision, leading to the testing and development of new strategies to meet the requirements for making these techniques viable. Therefore, this study follows this direction by proposing a mathematical modeling of a WDM system, followed by the optimization of optical filter design using the brute force search method and the golden section search method. This approach yielded the best values for the optical filter apertures through the golden section algorithm, where evaluations for each channel were performed with fewer evaluations of the SINR equation and in significantly less time.