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Performance limits of first-order PMD compensators using fixed and variable DGD elements

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2 Author(s)
Yu, Q. ; Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA, USA ; Willner, A.E.

In this letter, we analyze optical polarization-mode dispersion compensators using a single differential-group-delay (DGD) element that is either fixed or variable. We evaluate the upper-bound performance limits, and quantify the compensator performance under dynamic operations. We show that the variable-delay compensator can reduce the risk of feedback loops trapping a locally optimized state. Moreover, the variable-delay approach provides superior performance as compared to a fixed-delay compensator by increasing the optimal system tolerance for a 10-Gb/s nonreturn-to-zero signal from 28 to 33 ps of average link DGD.

Published in:

Photonics Technology Letters, IEEE  (Volume:14 ,  Issue: 3 )

Date of Publication:

March 2002

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