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Non-feedback precoder for optical DQPSK modulation

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【Author】 Lumin Zhang 1 , Yi Dong 1 , Zhaohui Li 2 , Hao He 1 , and Weisheng Hu 1 1 State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, China 2 Institute of Photonics Technology, Jinan University, Guangzhou 510632, China

【机构】 State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University； Institute of Photonics Technology, Jinan University；

【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.更多还原

【Abstract】 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.更多还原

【关键词】 DQPSK； quadrature； keying； switch； replacement； exclusive； transmitter； limitation； encoder； demodulation；

【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)

【文献出处】 Chinese Optics Letters ,中国光学快报(英文版) , 编辑部邮箱 ,2010年09期

【分类号】TN911.3
【下载频次】33

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