Q194
An optical link uses a fiber having a power loss of 1 dB/km. A typical photo detector has responsivity 0.5 A/W. If the link is 3 km long and the detector is required to produce a current of 25 µA, the required transmitted power is
A.
0 dBm
B.
-10 dBm
AnswerC.
-30 dBm
D.
-50 dBm
Answer: Option B
Solution
Answer: Option B
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