Patent ID: 8682164
Filing Date: 2014-03-25
Classification: H04B,H04J,H04L

Abstract:
1. An optical wavelength division node connected with and provided between an optical line terminal (OLT) and a plurality of optical network unit (ONU), comprising: an optical splitter for receiving a downstream signal light source with a single wavelength transmitted by the OLT and splitting the received downstream signal light source into a first-path signal light source and a second-path signal light source; a plurality of optical circulators sequentially and individually connected to each of the plurality of ONUs, wherein the optical circulator in a first-order position receives the first-path signal light source transmitted by the optical splitter and transmits the first-path signal light source received from the optical splitter to the ONU in a first-order position, so as to receive a return signal transmitted by the ONU in the first-order position and then pass the return signal received from the ONU in the first-order position to the optical circulator in a second-order position, until the optical circulator in a last-order position receives the return signal transmitted by the ONU in a last-order position and transmits the return signal received from the ONU in the last-order position; and a colorless light source module for receiving the second-path signal light source transmitted by the optical splitter and the return signal transmitted by the optical circulator in the last-order position, and using the second-path signal light source to modulate the return signal received from the optical circulator in the last-order position to generate an upstream signal light source to be then transmitted back to the OLT by the optical splitter; wherein the colorless light source module comprises at least two colorless light source transceivers, a first switch and a second switch; wherein the first switch is connected with the two colorless light source transceivers and the optical circulator in the last-order position; and wherein the second switch is connected with the two colorless light source transceivers and the optical splitter.