PMD

B \ DPMD 0.5 ps/?km 0.1 ps/?km

10Gb/s Lkm L�km

40Gb/s Lញkm Lkm

• 10Gb/s or lower: not an issue except for bad fibers

• 40Gb/s or higher: will be an issue

PMD < a% bit duration (a=10)

=>

Nl

OADM

OADM

OADM

OA

OA

OA

DPMD(k) & L(k): : PMD parameter & length of the kth span, k=1, .., M

L: total length of a transparent segment

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