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When the optical power launched into an 8km length of fiber is 120 microwatt the mean optical power at the fiber output is 3 microwatt. Determine
written 6.2 years ago by gravatar for teamques10 teamques10 ★ 69k •   modified 5.0 years ago

(i) the overall signal attenuation or loss, in decibels through the fiber assuming there is no connector or splicer. (ii) The signal attenuation per kilometer for the fibers.
advanced communication system
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written 6.2 years ago by gravatar for teamques10 teamques10 ★ 69k •   modified 6.2 years ago

A. Overall Signal attenuation or loss in decibels through the fiber assuming there are no connectors or splices is given by,

Signal attentuation $(\alpha _{db}L) = 10log_{10}Pi/Po \\ \ \ \ \ \ \ \ \ \ \ \ = 10log_{10}(120\times10^{-6} / 3 \times 10^{-6}) \\ \ \ \ \ …

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