Low latency passive optical node for optical access network

A novel passive optical node with low latency for optical access network (OAN) is proposed, in which the optical circuit just consists of several optical splitters. 1310nm/ 1490nm wavelength division is used in the node. At 1310nm wavelength, any optical network unit (ONU) in one group can transmit the uplink signal to OLT and any ONU in the other group. This realizes communication between two ONUs to handle the east-west traffic directly. Compared with conventional point-to-multipoint passive optical network, simulation results show the node can reduce the average frame latency evidently and handle traffic burst well.