Abstract
Spun fibers are increasingly used in telecommunication systems
because their polarization-mode dispersion (PMD) is lower than that in
unspun fibers. In this paper, we investigate the effects of a periodic
spin on the PMD of fibers with randomly varying birefringence. Numerical
simulations show that when the spin period is of the same order as or
larger than the beat length, the mean differential group delay of a spun
fiber depends on the model used for the random birefringence. We then
carry out a general theoretical analysis using the second Wai-Menyuk
model, which is the only model of fiber birefringence to date that is
consistent with polarization optical time domain reflectometry data.
Finally, we consider some particular regimes by means of a perturbative
approach.
© 2003 IEEE
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