题目内容

Fiberattenuationrefersto()

A. 由于群速度不同而引起光纤中光功率的减少
B. 由于工作波长不同而引起光纤中光功率的减少
C. 光信号沿光纤传输时，光功率的损耗
D. 由于光纤材料的固有吸收而引起光纤中光功率的减少

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