In millimeter-wave (mm-wave) optical double sideband (DSB) signal transmission systems, the received radio frequency (RF) power fades periodically because of the group velocity dispersion (GVD) and the self-phase modulation (SPM) of optical fibers. In this paper, cancellation of the signal fading by using midway optical phase conjugation in mm-wave subcarrier multiplexed (SCM) optical DSB signal is analyzed. Fading-free 60 GHz mm-wave optical DSB signal transmission over 100 km-long nondispersion shifted single-mode fiber at 1550 nm by using a semiconductor optical amplifier (SOA) optical phase conjugator (OPC) in the midway of optical link is experimentally demonstrated for the first time. Finally, the degradation factor of the OPC system is also discussed.
Hideyuki Sotobayashi and Ken-ichi Kitayama, "Cancellation of the Signal Fading for 60 GHz Subcarrier Multiplexed Optical DSB Signal Transmission in Nondispersion Shifted Fiber Using Midway Optical Phase Conjugation," J. Lightwave Technol. 17, 2488- (1999)