Examveda
Examveda

When the input and output power in an optical fiber is 120μW & 3μW respectively and the length of the fiber is 8 km. What is the signal attenuation per km for the fiber?

A. 3dB/km

B. 2dB/km

C. 1dB/km

D. 4dB/km

Answer: Option B


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