Optical splitters should be tested before installation, after installation, and in case of problems. This method uses a test source (TS) with a reference cable and an optical power meter (OPM) with a. This guide demystifies fiber optic splitters, explaining their design, operating principles, types, key specifications, and real-world applications. Whether you're a network engineer designing a PON (Passive Optical Network) or a homeowner curious about how your fiber connection works. many aspects of a Fiber to the X (FTTx) network. conversations and confusion in the industry. A “splitter” is a power splitter. A splitter is. Optical splitters and couplers split or combine light—distributing signals injected into a single fiber strand to multiple fibers, enabling point to multi-point communication in Fiber To The Home (FTTH) networks based on ITU. It is one of the most important elements of all FTTx PON and OLAN networks.