光衰減器(Fiber Attenuator)

光衰減器（optical attenuator）、光學衰減器或光纖衰減器（fiber optic attenuator）是一種用於減少存在於自由空間或光導纖維中的光信號功率的設備。光衰減器的基本類型有固定、逐步可變和連續可變。

Optical attenuator (optical attenuator), optical attenuator or fiber optic attenuator (fiber optic attenuator) is a device used to reduce the power of optical signals that exist in free space or optical fibers. The basic types of optical attenuators are fixed, gradually variable and continuously variable.