This work presents a multi-service CATV system that transmits CATV and wireless signal
simultaneously by a single wavelength only. A multi-carrier CATV signal is modulated in the
amplitude domain of the optical carrier, and 1.25 Gbps 16 QAM OFDM signals are modulated in the
optical phase domain. Unlike the published schemes which utilizing an optical phase to intensity
converter to convert the optical phase-modulated OFDM signal into an intensity-modulated OFDM
signal, the optical PM signal in the proposed system is demodulated by fiber dispersion itself only.
Analytical results indicate that a single optical wavelength can serve these two applications
simultaneously without serious distortion. This multi-service transport system, in contrast to the
previously developed systems does not incur the DC bias drift problem. Furthermore, modulating
these two signals at different domains can prevent inter-channel interference. Excellent CNR, CSO,
CTB and BER performance are experimentally achieved for the CATV and high-quality wireless
signal transmissions.