Investigation of wavelength division multiplexed passive optical networks

Abstract

The fastest growing areas in telecom are broadband services and networks. The explosion of the Internet coupled with new video centric services has increased the demand for high bandwidth in access networks.Fiber to the home, based on a PON due to its high bandwidth, cost sharing of infrastructure, and absence of active components, is considered as a good solution to this demand. Services such as IP high-definition video delivery, Voice-over-IP, social networking and cloud computing have pushed the demand for bandwidth even beyond what is achievable with today’s gigabit PONs. WDM-PON is a promising candidate of the low-cost subscriber networks for the fiber-to-the-home systems. Its upgradability, large capacity and flexibility are its qualities that make it such a promising candidate. Wavelength-division-multiplexing transmits multiple data signals using different wavelengths of light through a single fiber. The objective of this dissertation is to investigate and propose low cost architectures for high speed performance of Passive Optical Network. Firstly, an 80 km ring based WDM-PON architecture for high speed data communication is proposed. In this ring architecture the data is transmitted at a rate of 4×12 Gb/s at each node. Secondly, the performance effect of WDM PON architecture is analyzed using different receiver filters. The results obtained with Bessel filter are the best amongst the other filter results. Thirdly, a low cost architecture to integrate multiple PONs to a long reach spectrum sliced WDM network is proposed. LEDs are used as a broadband light source.