Abstract
A multi-Gb/s 60 GHz radio over fiber (RoF) system employing direct
modulation of an optically injection locked vertical-cavity surface-emitting
laser is successfully demonstrated. Experimental results show that the RoF
system is tolerant to fiber chromatic dispersion due to inherent
single-sideband modulation produced by injection locking. A simple
carrier-to-sideband equalization method is used to substantially improve the
sensitivity of the RoF system by 18 dB, enabling both successful wireless
signal transmission and multilevel signal modulation formats such as
quadrature phase shift keying (QPSK). At least 3 Gb/s ASK-modulated data and
2 Gb/s QPSK-modulated data is transported over up to 20 km standard
single-mode fiber and 3 m wireless distance with no penalty.
© 2010 IEEE
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