n.衰減器
And it can be used as variable optical attenuator and electro-optic detector, too. 同時可以用作保偏可調(diào)光衰減器和電光探測器。
An amplifier or attenuator may be needed to ensure that the required level of power is transmitted through the switch. 可能就需要一個放大器或衰減器，以確保通過開關(guān)傳輸所需的功率。
