Experiment investigation of PAPR reduction schemes in the intensity modulation direct detection optical OFDM system

Abstract

In recent years, optical orthogonal frequency division multiplexing (OOFDM) has emerged as a dominant research and development area in the field of high-speed optical communications. OFDM is a potential candidate as the most promising next-generation optical networks such as passive optical networks and optical transport networks, due to their simple configuration based on low cost, high speed data rates, high spectral efficiency, high quality of service and robustness against narrow band interference, frequency selective fading, and chromatic dispersion. However, intensity modulation - direct detection (IM/DD) OOFDM is known to be susceptible to high peak-to-average power ratio (PAPR) and chromatic dispersion (CD). When the optical launch power is relative high, high PAPR will cause distortion in both electrical and optical devices, resulting in the fiber nonlinear effects. In this thesis, we propose three IM/DD optical OFDM systems and develop some algorithms to reduce the fiber nonlinearity through reducing the high PAPR of the optical OFDM signal.