The PLC planar waveguide fiber optic splitter has the characteristics of small size, wide operating wavelength range, high reliability, and good spectral uniformity. It is particularly suitable for connecting central and terminal equipment in passive optical networks (EPON, BPON, GPON, etc.) and realizing the splitting of optical signals. There are two types: 1 × N and 2 × N. The 1 × N and 2 × N splitters evenly distribute optical signals from a single or double inlet to multiple outlets, or work in reverse to merge multiple optical signals into a single or double optical fiber. This device is used for user access points in FTTX systems that require optical splitting. It primarily completes the termination of optical cables entering residential areas or buildings, featuring functions such as fiber fixation, stripping, splicing, patching, and branching. After splitting, the light enters the end-user in the form of a drop cable.