Lately, in multigigabit-per-second lightwave transmission systems, emphasis has been laid on Polarization Mode Dispersion (PMD), and it looms as a potentially dominant source of pulse distortion in ultrahigh-bit systems. The measurement of PMD is realized in China for the first time and it is based on wavelength scanning method. The measured results of longer non-polarization maintaining fiber are fit to Maxwell distribution, and the measured results of many fibers made in China reveal that qualities of these fiber should be modified.
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