Numerical modeling of all optical self switching in chalcogenide fibre Bragg grating

We study numerically nonlinear behavior of nonlinear chalcogenide fiber Bragg gratings. We consider more types of gratings with different apodization profile and compare their performance in all-optical processing. The nonlinear coupled mode equations were solved numerically to obtain the transmission characteristics. As numerical method is used optimized split step method. We demonstrate the bistable behavior and also time and spectral properties of these gratings. The results show advantages and disadvantages of apodized gratings in several respects of all-optical processing.