Demonstration of the GbE Service in the Converged Radio-Over-Fiber/Optical Networks

In this paper, we demonstrate the full-duplex radio-over-fiber (RoF) system operating in the 60 GHz band and gigabit Ethernet services in the integrated RoF/optical network architecture. The proposed full-duplex 60 GHz RoF system incorporates the centralized photonic upconversion, using the fiber-optic wavelength conversion technique and the envelope detection/direct optical modulation techniques in the 60 GHz band. The RoF system comprises physical link of a 34 km fiber between the central station and the base stations (BSs) with the 5 m aerial distance between the BS and the customer unit for end-user access. The analog performance of the photonic upconversion function are measured and characterized to map the ranges of optical conditions for stable operation, the modulations depth and the spurious-free dynamic range (SFDR). The SFDR above 80.0 dB.Hz^2/3 is obtained for the probe wavelength ranged from 1540 to 1555 nm at the bias voltage of -0.8 V. The optimum modulation depth is shifted from -1.0 to -0.5 V correspond to the probe wavelength from 1560 to 1530 nm. The downlink bit-error-rate performance shows direct relationship with its modulation efficiency changes for bias voltages and pump wavelengths.