Optical fiber splitter: Just like coaxial cable transmission systems, optical network systems also need to couple, branch and distribute optical signals, which requires an optical splitter to achieve. The optical splitter, also known as the optical splitter, is one of the important passive components in optical fiber links. It is a fiber optic junction device with multiple input terminals and multiple output terminals. It is usually denoted as MN, indicating that a splitter has M input terminals and N output terminals. The optical splitters used in optical fiber CATV systems are generally 1X2,1X3 or above, and the 1XN optical splitters composed of them.