Characterization of ROF signal based on cascaded optical carrier suppression modulation technique

The paper experimentally demonstrated the optical frequency quadrupling microwave signal generation, a 4 GHz radio frequency (RF) signals up-conversion to 16 GHz in a radio over fiber (ROF) link, using twice optical carrier suppression modulation. The RF signal was mixed with 1.25 Gbps NRZ-OOK data firstly and then modulated by two cascaded single-electrode optical intensity modulators. The obtained 1.25 Gbps/16 GHz ROF signal was transmitted and characterized in the optical fiber link. At BER of 10^?9, low power penalty of 1.0 and 1.4 dB were obtained over a fiber link with a transmission distance of 25 and 50 km.