摘要
We propose a novel and simple all-optical 160-Gb/s orthogonal frequency division multiplexing（OFDM） symbol generator which is based on discrete triangle waveform driving-LiNbO_3 modulators to realize large-range linear optical shift.The entire system needs 64 discrete modulators：at the transmitter,a 2.5-Gb/s optical duobinary（ODB） modulator for data modulation and a 2.5-Gb/s triangle waveform driving-LiNbO_3 phase modulator for phase shift to generate each subcarrier;and at the receiver,a 2.5-GHz optical band pass filter（OBPF） using Faraday anomalous dispersion optical effect to separate them.Excellent bit error rate（BER） is observed after 1060 km of transmission without any dispersion compensation.
We propose a novel and simple all-optical 160-Gb/s orthogonal frequency division multiplexing（OFDM） symbol generator which is based on discrete triangle waveform driving-LiNbO_3 modulators to realize large-range linear optical shift.The entire system needs 64 discrete modulators：at the transmitter,a 2.5-Gb/s optical duobinary（ODB） modulator for data modulation and a 2.5-Gb/s triangle waveform driving-LiNbO_3 phase modulator for phase shift to generate each subcarrier;and at the receiver,a 2.5-GHz optical band pass filter（OBPF） using Faraday anomalous dispersion optical effect to separate them.Excellent bit error rate（BER） is observed after 1060 km of transmission without any dispersion compensation.
基金
supported by the National"973"Program of China(Nos.2010CB328300 and 2010CB328303)
the National Natural Science Foundation of China(No. 60772013)
the National"863"Program of China(No. 2009AA03Z408)
the Open Fund of Key Laboratory of Optical Communication and Lightwave Technologies Beijing University of Posts and Telecommunications, Ministry of Education,China.
