Abstract
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
1530nm. The downlink bit-error-rate performance
shows direct relationship with its modulation efficiency changes for bias
voltages and pump wavelengths.
© 2010 IEEE
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