Two types of fiber optic splitters are commonly used in PON networks: One is the FBT coupler splitter and the other is the PLC splitter. As PLC splitter has the advantages of flexible working wavelength, good stability, low-temperature loss, and a smaller failure rate, people prefer to use PLC splitters rather than FBT splitters. Nowadays, there are many packaging types of PLC splitters on the market to suit all applications.