The 1-to-4 Plug-in PLC Optical Fiber Splitter is a passive device designed to distribute optical signals from a single input to four output ports with high precision. Utilizing PLC (Planar Lightwave Circuit) technology, it ensures low insertion loss (7.2dB max), high uniformity (0.8dB), and excellent temperature stability. Its compact plug-in design allows easy integration into fiber distribution frames or network cabinets. This splitter is widely used in FTTH (Fiber-to-the-Home) networks, PON (Passive Optical Network) systems, and local area networks for efficient signal distribution. It reliably supports full wavelength operation from 1260nm to 1650nm, making it ideal for broadband and triple-play service applications.