Design of multistage FBG with variable filter parameters

Abstract

Abstract Dispersion is the main problem that limits long-distance and high-speed optical fiber transmission. Bit error rate, the signal-to-noise ratio, and system performance all suffer from dispersion. Many dispersion adjustment strategies have been created to combat this. One of the effective methods for compensating for dispersion is the usage of fiber Bragg grating (FBG). In the suggested thesis, cascaded uniform fiber Bragg grating (UFBGs) with various lengths, a constant grating period, and a constant gap between FBGs are used. This system is modeled, analyzed, and compared for the best performance and different applications. The control parameters affecting the system are the coupling coefficient, number of FBGs, grating period, and the number of grating periods. The control parameters for this system are studied to compensate for the effect of dispersion. A trade-off between increasing bandwidth and roll-off factor. Another trade-off between flatness and roll-off factor. These trade-offs can be considered according to applications. MATLAB is used to simulate the mathematical equations for the suggested model.