Simultaneous baseband and radio over fiber signal transmission over a 5 km MMF link

We have successfully demonstrated the simultaneous transmission of high-frequency subcarrier multiplexed CATV channels and 2.5 Gb/s error- free digital through a 5 km 62.5-mum core-diameter graded-index multimode silica fiber link. Successful transmission is achieved by a combination of a low-linewidth DFB laser and singlemode fiber central launching.