Hybrid Access Network Integrated with Radio-over-Fiber and Passive Optical Network

A RoF system based on the OCS modulation for WDM-PON is presented and experimentally evaluated as a solution for next generation broadband access networks. 20-GHz subcarrier system over 25 km transmission is established and verified. Suppressing the optical carrier enables the baseband signals and radio frequency (RF) signals to be detected by photodiode. Experimental results demonstrate BER of 10 ^-4 at the received Rx 3.25dBm with the link length of about 25km. A technique for source-less upstream transmission is also experimentally demonstrated, as downstream transmission channels can transfer the baseband signals and RF signals simultaneously.