AbstractsComputer Science

Long-haul high capacity optical fiber communications link with DWDM technology

by Sameera Silva




Institution: California State University – Northridge
Department: Department of Elec & Comp Engr
Degree: MS
Year: 2015
Keywords: Wavelength division multiplexing; Dissertations, Academic  – CSUN  – Engineering  – Electrical and Computer Engineering.
Record ID: 2061563
Full text PDF: http://hdl.handle.net/10211.3/133318


Abstract

Today, due to the increasing number of internet users and new bandwidth guzzling applications, existing RF and microwave communications systems have become inadequate to handle ever increasing bandwidth requirements. Most long haul communication links have been replaced by optical fibers since the information carrying capacity of an optical wave is about 10,000 times greater than that of a high RF wave. Emerging technologies such as DWDM (Dense Wavelength Division Multiplexing) has increased the data carrying capacity of current optical fiber links to Tbps levels which is far more than the world???s current bandwidth requirement. These sophisticated high speed real world photonic communication systems are developed on basic underlying concepts of light wave systems. The purpose of this project is to explore the world of the high capacity optical communication systems and the theory behind this promising technology through a comprehensive design and simulation of a long haul high speed fiber optics communication link operates in C band (1550 nm transmission window). A basic system model capable of carrying data at a speed of up to 20Gbps was developed. The prototype system uses 8 DWDM channels each operating at 2.5 Gbps. The design was simulated using OptiSystem optical communications systems design software to verify the operation of the designed system and further investigate the performance under advanced performance limiting factors such as nonlinearities which were not taken into account during the calculations. The upgradability of the communication link per future demand has also been investigated through simulations.