Novel 64×2.5 Gb/s all-optical OFDM symbol generator based on triangle waveform driving-LiNbO_3 modulators  

作　　者：李源 李蔚 梁晓军 杨克成 乔耀军 

机构地区：[1]Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology [2]Department of Computer Science and Technology,Central China Normal University [3]Key Laboratory of Information Photonics and Optical Communications,Ministry of Education,Beijing University of Posts and Telecommunications

出　　处：《Chinese Optics Letters》2010年第5期449-453,共5页中国光学快报（英文版）

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.

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.

关 键 词：Bandpass filters Bit error rate Error compensation Frequency allocation Orthogonal frequency division multiplexing Orthogonal functions 

分 类 号：TN761[电子电信—电路与系统]