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Improving the accuracy of mean DGD estimates by analysis of second-order PMD statistics

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5 Author(s)
Boroditsky, M. ; Res., AT&T Labs, Middletown, NJ, USA ; Brodsky, M. ; Frigo, N.J. ; Magill, P.
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The authors propose a novel technique to improve accuracy in measurements of the mean differential group delay (DGD) of optical fiber. Using the statistics of the second-order polarization-mode dispersion and averaging properly, they find a 30% reduction in measurement uncertainty, which is equivalent to doubling the measurement's optical bandwidth. The authors motivate the necessity for proper averaging by first demonstrating that the conventional conversions of "mean-square" to "mean" DGD lead to (correctable) systematic errors for finite bandwidth measurements.

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Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 3 )