Investigation On Sensitivity Of Fiber Bragg Gratings Based On Optical Attenuation

Nor Hisham, Muhammad Faiz Affendi (2018) Investigation On Sensitivity Of Fiber Bragg Gratings Based On Optical Attenuation. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This study is conducted to investigate the sensitivity of Fiber Bragg Gratings(FBG)based on optical attenuation by varying the parameter that contribute toward attenuation. Generally, FBG is one of the important component in optical system hence knowing its sensitivity help the researcher to design optical system with better performance. An output signal passing through optical communication system with and without the implementation of FBG is compared. Basic communication block diagram that made up simple optical system consisted of broadband sources, pulse generator, modulator, optical fiber, FBG and visualizer were designed and analysed. It is appeared that from the simulation that have been done, the output signal with implementation of FBG is less dispersed and scattered compared to the system without the FBG. The three parameter that was selected to be varied for the analysis is fiber length, attenuation coefficient and input power. The results was tabulated, eye diagram and a graph of noise figure and gain versus varied parameter was plotted and analyses. It is found that output signal with implementation of FBG at 10 km with attenuation coefficient 0.2 dB/ km results in clean and wide eye diagram with less dispersed and scattered compared to the system without the implementation of FBG.

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