Fibre optic adapters are passive elements designed to connect pigtails and patch cords. 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. Think of this article as a path to understanding fiber signal. Precision Micro-Optics offers a broad range of industry standard adapters. Precision also offers supply many fiber optic attenuators, such as FC, SC, ST, LC, MU. Control signal strength and split optical paths with Amphenol FOP's durable fiber attenuators and precision optical couplers-ideal for telecom, data centers, and test setups.