Variable optical attenuator

摘要

Disclosed is a variable optical attenuator comprising: a transmitting fiber for transmitting light; a receiving fiber for receiving light from the transmitting fiber; an attenuating module provided between the transmitting and receiving fibers for attenuating light and having a transmitting unit, an attenuating unit and a receiving unit; an actuator for driving the attenuating unit; and a substrate supporting the transmitting fiber, the receiving fiber, the attenuating module and the actuator. The attenuating unit is driven offset in a lateral or angular motion to attenuate light. The transmitting, attenuating and receiving units of the attenuating module are formed into one module to obtain simple relative alignment of optical axes.