A fiber optic attenuator is a passive optical component that is used to reduce the power level of an optical signal in a fiber optic communication system. The basic types of optical attenuators are fixed, step-wise variable, and continuously variable. Optical attenuators work by absorbing or reflecting a portion of the optical signal, thus reducing its. 📦 For purchasing, use the RP Photonics Buyer's Guide for fiber-optic attenuators. It provides an expert-curated supplier directory, buyer-focused technical background information, and structured selection criteria to support professional procurement decisions.