Optical Transport Network Performance Analysis Using Optimally Placed FBG as Dispersion Compensation

Abstract

The optical communication system can transmit video, voice, data, and multimedia services across long distances. The performances of all optical fiber communications systems affected by factors like chromatic dispersion, polarization mode dispersion, attenuation, and non-linear effects at the time of transmitting information are from one place to another. Therefore, it is vital to minimize the dispersion and amplify all the light signals at the same time after a certain interval of light propagation to recover the original signal. In this thesis, investigation done to improve the overall system of the optical transport network performance by using optimally placed Fiber Bragg Grating for dispersion compensation and an optical amplifier to increase the attenuated signal power. In this thesis, performance analysis of different channels of the Dense Wave Division Multiplexing network at different parameters done based on fiber Bragg grating and erbium-doped fiber amplifier as dispersion compensation and amplification mechanism using opti-system software. Here first we analyzed the fiber communication system without Erbium Doped Fiber Amplifier and Fiber Bragg Grating dispersions compensations techniques. Secondly, optical communications systems evaluated by using different dispersions compensator techniques of Fiber Bragg grating and Erbium Doped Fiber Amplifier. The performances of the three dispersions compensators of the FBG has been evaluated based on various parameters like input power, distance, Q factor, Bit Error Rate, eye height, and threshold level at the receiving end. It is possible to observe and easily take the best dispersions compensators for new deployment of DWDM systems for a given distance, data rate, transmission power, and capacity, especially for campus, huge private and public service that needs long haul high traffic network. In our work Symmetry FBG dispersions compensators are the best compensators than pre and post FBG dispersions compensators for long distance communications. Symmetry FBG dispersions compensators have a good quality factor and BER than pre and post FBG desperations compensators for a given four, eight, thirty and forty numbers of channels. For four channels, quality factor improved using Mix-FBG and EDFA for 2.5, 5 and 10Gbps to the maximum / minimum of 65.6/57.9, 57.9/4.6 and 4.6 respectively. From the result, Mix-FBG dispersion compensators for four channels DWDM systems have a good quality factor than pre and post FBG dispersions compensators. In addition, I suggest for the future work to do for higher data rate transmissions by different configurations of dispersions compensations techniques of FBG for a number of channels