Collaborative research: mathematical and computational methods for high-performance lightwave systems
Gino Biondini Principal Investigator
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Novel transmission formats hold the potential for large increases in <br/>the total system capacity of optical fiber transmission systems. At <br/>high bit-rates, however, nonlinear and stochastic physical effects <br/>contribute to limit the overall system performance. The deterministic <br/>impairments are mainly due to the combination of nonlinearity and <br/>dispersion. The stochastic impairments occur due to amplifier noise <br/>(which induces amplitude, timing and phase fluctuations) as well as <br/>polarization-mode dispersion. All of these effects produce impairments <br/>which lead to unacceptable rates of transmission errors. However, <br/>the large scale and complexity of these systems, the variety of effects <br/>involved, and the extremely low bit-error-ratios required of these <br/>systems (which requires studying the occurrence of extremely rare <br/>events) all contribute to make the modeling of optical fiber <br/>communications a challenging task. Recent work has demonstrated that <br/>careful mathematical and computational modeling can be very effective <br/>in describing the behavior of realistic optical fiber transmission <br/>systems. This research project aims at evaluating the potential of <br/>new transmission formats and assessing how each of them is affected <br/>by the various transmission impairments. The methods that will be <br/>developed in this project are expected to make an impact on how <br/>these systems are modeled and designed. In addition, because <br/>new ultra-short pulse lasers share many similarities with <br/>dispersion-managed optical transmission systems, the mathematical <br/>techniques that will be developed as part of this research project <br/>will help researchers understand the behavior of these lasers and <br/>their fundamental limits.<br/><br/>The development of high-capacity optical fiber communications has <br/>been a major technological advance that enabled the widespread use <br/>of the internet and the world-wide-web which revolutionized our <br/>day-to-day interactions. The demand for further increase in the <br/>total transmission capacity remains unabated, however, fueled by <br/>emerging applications such as video-on-demand, video-conferencing <br/>and others requiring very large bandwidths. A key feature of this <br/>collaborative research project is the combined use of sophisticated <br/>mathematical and computational methods to model the behavior of <br/>realistic lightwave systems, with the aim of developing the accurate <br/>tools which are needed to efficiently study the behavior of optical<br/>fiber transmission systems and to design the next generation of <br/>systems. As such, the outcome of this project will contribute to <br/>strengthening the national infrastructure and maintaining U.S. <br/>competitiveness in an area which is of great national interest,<br/>thus benefiting not just researchers, but also the community at <br/>large.