Carrier-grade standard insert type 1-4 optical splitter, low insertion loss, uniform light splitting2. Low insertion loss, high return loss, good interchangeability, good repeatability, good temperature stability3. Uniform light splitting and stable transmission using. 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. T PON standards such as GPON, XGS-PON and new 25 and 50G standards. These devices enable more effective monitoring and management of optical networks.