Performance characterisation of fiber Bragg Grating in communication system / Sheliza Abu Bakar

This thesis presents the performance characterizations of fiber Bragg Grating for single and two channels optical communication system. Transmission system operating at lOGbit/s data speed are used with the signal wavelengths of ITU#34 (1550.12nm) and ITU#35(1549.32nm) as the preference of channel designation in this project. The channel spacing of 100GHz (approximately 0.8nm) is chosen by ITU standard for the distance between channel wavelengths. The channel wavelengths are equally spaced in optical frequency base on the International Telecommunication Union (ITU) standard. Individual components are characterized by varying its main parameters to investigate experimentally their individual performances using ED-WDM system. The systems set up are analyzed using fiber optic equipments which involve OPTOSCi ED-WDM, signal generator and oscilloscope. Fiber Bragg Grating represents one of the key elements as an optical device used for channel filtering in the emerging of optical communications. The various types of applications are mostly applied for measurement parameters such as power, temperature and losses which provides excellent filter spectral shapes. It have been confirmed experimentally that results are compatible with the performance characteristics of FBG such as sharp and flat-top amplitude responses, flat delay responses and high isolation. From this analysis, it is confirmed that the application of FBG principle where transmission and reflection path influences the FBG characteristics. Therefore, FBG is applicable with the advantages of low cost, high optical filtering and easy matching with other fiber devices.