Planar lightwave circuit splitter(PLC Splitter) is an integrated lightwave optical power distribution device based on a quartz substrate.The splitter loss in optical fiber is low. And it has many characteristics, such as compact structure design, wide operating wavelength range, high reliability, low insertion loss, low polarization dependant loss and good channel uniformity and so on. It is especially suitable for the connection between the central office and terminal equipment in the Passive Network (BPON, EPON,GPON, etc.), and can achieve the distribution of optical signals.