Abstract
Abstract : Our research is focused on three major aspects of advanced optical fiber communication systems: dynamic wavelength division multiplexing (WDM) networks, high dynamic range coherent analog optical links, and fiber nonlinearities. In the area of WDM networks, a prototype high-speed interface board between workstation and WDM network has been designed, implemented, and tested, with a highest data rate so far of 728 Mbps. We also began the theoretical investigation of a system using combined ASK/DPSK modulation formats. The results show the feasibility of using semiconductor lasers with ASK/DPSK combined modulation in future dynamic WDM network. In the area of high dynamic range coherent analog optical links, we completed analyses of the spurious-free dynamic range (SFDR) of coherent amplitude and coherent angle modulated links and compared the results with those for conventional and optically preamplified direct detection links. In the area of fiber nonlinearities, we showed that the pdf of four wave mixing interference is non- Gaussian and analyzed the impact of four wave mixing on the attainable receiver sensitivity of coherent WDM digital systems for both dispersion-shifted and non- dispersion-shifted fiber. A more detailed summary of our research is contained in the following sections.
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