USource GPON ONU BOSA Diplexer with SC pigtail is a bi-directional transceiver device suitable for GPON ONU application. The device consists of a transmitter, a receiver, WDM filter and a single mode fiber pigtail . The transmitter section uses the uncooled 1310nm DFB Laser Chip with a monitor photodiode, the receiver section uses the 1490nm Continue-Mode APD or PIN Receiver with Super TIA.