Abstract
This contribution presents numerical studies of the nonlinear fiber Bragg grating (FBG). The proposed model corresponds well to chalcogenide FBG as a considerable tool for optical switching. The spectral response of this device is discussed theoretically. Simulations based on the nonlinear coupled mode theory are used for investigating the relationships between the spectral transmission of nonlinear chalcogenide FBG and the grating parameters. The influence of the temperature dependence of FBG is numerically investigated. Numerical results show that the ambient temperature has an influence on the spectral response of FBG. The results are indications for applications in optical switches for all-optical communication networks and this can be important for wavelength division multiplexing optical networks.
Highlights
Optical bistable devices have a large number of applications in all-optical communication systems
In this paper we focused on the optical switches devices
We observe the change in the transmittance: when the incident intensity increases from zero, the transmittance traces the lower branch of the line until the input intensity achieves the switching point, where the output makes a rapid jump to the upper branch
Summary
Optical bistable devices have a large number of applications in all-optical communication systems. Is still the problem of variable optical communication path characteristics and environmental fluctuations [10, 11].We investigate the nonlinear chalcogenide fiber Bragg gratings (FBG) as a promising device for all-optical switching. This effect can be modified depending on the incident light power which is assumed to be due to the optical Kerr effect. CGs are low-phonon energy materials and are generally transparent from near-infrared to mid-infrared These glasses are well-known as optical materials with high nonlinear optical properties.
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