This paper describes the concept and simulation of an fiber Bragg grating. Simulation of the transmission system have been analized using simulator OptiSystem, based on different parameters. Show there parameters are investigated by simulating a communication device model and using the most suitable system settings which include input power (dBm), fiber cable length (km) and attenuation coefficient (dB / km) in the cable segment; Namely, signal strength (dB), noise power (dB), receiver output (watts). The power values (-5.299 dB) and (-2.6635 dB) are found in which regions, which decrease as the number of network regions in the fiber increases, thus increasing the density efficiency (16.316) and (75.5192) as well as the number of fiber regions (FBG).
Keywords: Principle of FBG, Reflectivity And Tramsmission Spectrum in FBG, Periodic in FBG, Optisystem, Attenuation Coefficient.