Question #14936

When mean optical power launched into an 8 km of fiber is 120 mW, the output mean optical power is 3 microwatt. Determine:
(a) overall loss in dB
(b) single attenuation per kilometre

Expert's answer

a) losses=8*120*10^(-3)/3*10^(6)=32dB
b) 3/8*10^(6)=37.5dB/km

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