Abstract
The theoretical analysis is presented to search for the nonlinear phenomenon of the optical bistability in the fiber Bragg gratings (FBGs).We investigate the continuous wave nonlinear transmission characteristics of chalcogenide FBGs where chalcogenide glass is based on the chalcogen element Te. Simulations based on the nonlinear coupled mode theory considering forward and backward light waves are used to search numerically for the relationships between the input light fields and the transmissivity of FBGs. Material properties of photosensitive chalcogenide glasses, grating parameters, such as grating length and index modulation of grating on the transmission characteristics and the impact of the change of the Bragg wavelength are studied.
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