PMD-compensation techniques

AbstractPMD has become a serious limitation for the advent of 40G optical transmission systems. Commercial operators still avoid the utilization of optical PMD compensators since crucial questions such as expected performance and reliability are still subject to research and are not yet satisfactory answered for all relevant cases. The common solutions of tackling PMD, e.g., limiting transmission distance or selecting low-PMD fibers, does not necessarily apply for optical OTDM systems with bit rates beyond 160 Gbit/s. This article describes current approaches for PMD compensators with special focus on the requirements of optical OTDM systems.

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