A cost-effective passive optical network based on multiple-optical-subcarrier multiplexing

This article reports the design of a cost-effective broadband passive optical network (BPON), which is used in the multiple optical carriers in subcarrier multiplexing. This BPON is designed for the interface of a broadband ISDN and a subscriber loop. At the 1.55-μm upstream loop, the subcarrier multiple access (SCMA) technique can extend to eight optical network units. Each channel's transmission rate is 0.5 Mbit / s. The 1.3-μm downstream loop using the TDM technique is at a bit rate of 450 Mbit / s. Two results are obtained. (1) Clear eye patterns are achieved in two-directional multichannel data transmissions, and the bit error rates are less than 10^-9. (2) The end-to-end optical power budget of networks for bidirectional transmission is up to 25 dB, and the network can extend to 26 optical network units.