Non-feedback precoder for optical DQPSK modulation  

作　　者：章璐敏 董毅 李朝晖 何浩 胡卫生 

机构地区：[1]State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University [2]Institute of Photonics Technology, Jinan University

出　　处：《Chinese Optics Letters》2010年第9期881-883,共3页中国光学快报（英文版）

基　　金：supported by the National "863" Program of China;the Program for New Century Excellent Talents in University (NCET);the National Natural Science Foundation of China (Nos. 10778713 and608251030);the Program of Shanghai Subject Chief Scientist (No. 09XD1402200)

摘　　要：A novel non-feedback precoder circuit for high-speed parallel optical differential quadrature phase shift keying （DQPSK） modulation is proposed. The alternative control signal is introduced in replacement of the conventional feedback one, which eliminates the speed limitation due to the electronic propagation delay. The proposed precoder consists of four differential encoders, an exclusive OR gate, a cross switch, and delay lines. It is demonstrated by a true pseudo random bit sequence （PRBS） transmission at 20 Gb/s.A novel non-feedback precoder circuit for high-speed parallel optical differential quadrature phase shift keying （DQPSK） modulation is proposed. The alternative control signal is introduced in replacement of the conventional feedback one, which eliminates the speed limitation due to the electronic propagation delay. The proposed precoder consists of four differential encoders, an exclusive OR gate, a cross switch, and delay lines. It is demonstrated by a true pseudo random bit sequence （PRBS） transmission at 20 Gb/s.

关 键 词：FEEDBACK Optical systems 

分 类 号：TN911.3[电子电信—通信与信息系统]