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单项选择题The dispersion of a non-zero dispersion shifted fiber is 6 ps/nm*km at 1550 nm and 10 ps/nm*km at 1610 nm. What is the minimum dispersion compensation required if an L-Band DWDM signal travels through 200 km of fiber and has a dispersion tolerance of 1800 ps/nm?（）

A、none

B、-600 ps/nm

C、-200 ps/nm

D、+200 ps/nm

E、+600 ps/nm

  • C

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