60 GHz-band RoF system using photonic frequency upconversion and wavelength re-use techniques

We propose and experimentally demonstrate a full-duplex 60 GHz-band radio over fiber system using photonic frequency upconversion and wavelength re-use techniques. For downlink, an optical radio frequency signal in the optical single sideband format is generated by a photonic frequency upconverter using an optical demultiplexer and a wavelength converter. This upconverter, optimized for the phase noise performance of the upconverter, provides a conversion efficiency of up to 29 dB and a carrier to sideband ratio of up to -3 dB. For uplink, a wavelength re-use technique is used. The receiver sensitivity at the bit error rate of 10^-9 is -11.5 dBm and -32.5 dBm for downlink (including air transmission of 1.5m) and uplink, respectively. The power penalties originating from the fiber chromatic dispersion are negligible after transmission over 25 km single mode fibers for both downlink and uplink.