A.-10 B.10 C.-20 D.-30
A.通過光纖的電流 B.EDFA不需要功率源 C.在980nm或1480nm發(fā)光的泵浦激光器 D.從光信號(hào)中提取的功率
A.155.520Mb/s B.622.080Mb/s C.2488.320Mb/s D.9953.280Mb/s