Explore 44 top manufacturers and suppliers of Fiber Optic Attenuators in our comprehensive photonics buyers' guide. Basic types of fixed attenuation include single mode, dual window and multimode in D4/PC, FC, FC/UPC, MU, SC, SC/APC and UPC, ST and ST/UPC style connectors. Optical attenuators usually work by. Our fiber optic attenuators are designed to safely reduce optical signal power levels in fiber networks, essential for preventing receiver saturation and maintaining quality in test, measurement, PON, and CATV systems. Use the filters to narrow down on products based on your requirement.