An optical attenuator, or fiber optic attenuator, is a device used to reduce the level of an optical, either in free space or in an. The basic types of optical attenuators are fixed, step-wise variable, and continuously variable.
A tunable all-fiber optical attenuator (AOA) based on microfiber with adjustable coupling angle is reported and demonstrated. The AOA is fabricated of a microfiber probe coupled to a tapered fiber on th.