Coles Powell

10/14/2023 · Junior High School

When the mean optical power launched into an 8 km length of fiber is \( 120 \mu \mathrm{~W} \), the mean optical power at the fiber output is \( 3 \mu \mathrm{~W} \). Determine: a) The overall signal attenuation or loss in decibels through the fiber assuming there are no connectors or splices; b) The signal attenuation per kilometer for the fiber; c) The overall signal attenuation for a 10 km optical link using the same fiber with splices at 1 km intervals, each giving an attenuation of 1 dB ; d) The overall signal attenuation for a 20 km optical link using the same fiber with splices and connectors at 1 km intervals and 4 km intervals respectively, When each splice gives an attenuation of 1 dB and a connector giving an attenuation of 0.5 dB ; e) The numerical input/output power ratio in part (c) and part (d.)