Signal processing for fiber-optic communications

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The objective of the proposed research is to investigate techniques for all-optical regeneration in fiber-optic communication systems operating at bit rates of 40 and 160 Gb/s. All-optical regenerators improve the quality of signals degraded by transmission impairments. They have the potential to enable networks with enhanced functionality and increase the maximum achievable transmission distance. For a bit rate of 40 Gb/s, conventional electrical time division multiplexing (ETDM) is used to combine several lower bit rate signals into a single high bit rate signal. A technique known as optical time division multiplexing (OTDM) is used for a bit rate of 160 Gb/s since the required components are not available for ETDM. Methods for the demultiplexing of OTDM signals will be explored as a topic of considerable interest itself, but also as an essential requirement for enabling the research on 160 Gb/s all-optical regeneration.