Joint reduction of PAPR for OFDM-PON

In passive optical access network(PON) using orthogonal frequency division multiplexing(OFDM) technology,optical OFDM signal has a high peak to average power ratio(PAPR),so it has very high requirements for devices,and easily leads to nonlinear effects in the high-speed propagation.In this paper,the joint use of clipping and the signal pre-distortion reduces the influence of the PAPR,4dB improvement of the optical SNR is obtained in the OFDM-PON experimental system,and 5Gb/s in downlink can be achieved using each wavelength in single mode fiber of 50km.