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Transmission Technology: what’s the big deal? - page 17 / 46

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Conventional Single-Mode Fiber (SMF)

First single-channel systems operated at 1310nm (good laser materials)

Zero dispersion point at 1310nm.

WDM systems moved to 1550nm: wide low-loss window, but higher dispersion

Disp.-Limit = 1000 km at 2.5Gb/s  in SMF, so not really a problem for OC-48.

S

C

L

D(1530-1565nm) = 16 - 19 ps/nm*km

D = 0.065 ps/nm2km

Aeff = 85 um2

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