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 model, 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 coefficients, total number of cascaded UFBGs, grating periods, effective refractive index, and the total number of grating periods. The control parameters for this system are studied to compensate for the effect of dispersion. A bandwidth of 1.2 THZ is obtained when the number of cascaded UFBGs is equal to 5, 1.87 THZ is obtained when the number of cascaded UFBGs is equal to 10, 2.62 THZ is obtained when the number of cascaded FBGs is equal to 20, and 6.24 THZ is obtained when the number of cascaded FBGs is equal to 50. MATLAB is used to simulate the mathematical equations for the suggested system.

 

Keywords—cascaded FBGs, control parameters, dispersion compensation, Fiber Bragg Grating (FBG)


Cite: Hosam A. M. Ali, Khalid F. A. Hussein, and Ashraf S. Mohra, “Design of Multistage Fiber Bragg Grating (FBG) with Variable Filter Parameters," Journal of Communications, vol. 19, no. 5, pp. 242-247, 2024.




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