Challenges of coping with PMD in high-speed WDM optical systems

PMD is one of the critical hurdles in deploying high capacity fiber optical networks (OC-192 per channel and above). Due to its stochastic and time-varying nature, PMD compensation requires adaptive schemes, using feedback or feed-forward techniques. In this paper we will discuss practical issues and limitations of PMD compensation, as well as recent developments on architecture and feedback schemes.

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