差分相移键控的非归零到归零格式转换研究  

Non-Return-to-Zero to Return-to-Zero Format Conversion for Differential Phase Shift Keying

作　　者：余文科[1,2,3] 娄采云[1,2,3] 邢燕飞[1,2,3] 赵晓凡[1,2,3] 陆丹[1,2,3] 霍力[1,2,3] 

机构地区：[1]清华信息科学与技术国家实验室(筹),北京100084 [2]集成光电子国家重点实验室,北京100084 [3]清华大学电子工程系,北京100084

出　　处：《中国激光》2011年第2期142-146,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(60736036;61077055);国家863计划(2009AA01Z256);国家973计划(2011CB301700);北京市优秀博士论文(YB20091000301)资助课题

摘　　要：提出了一种全新的基于相位-强度混合调制和色散补偿的光差分相移键控(DPSK)信号的非归零(NRZ)到归零(RZ)格式转换器,理论分析了转换器参数对转换的影响,数值研究了恶化条件下的10 Gb/s的NRZ-DPSK到RZ-DPSK的格式转换。实验展示了10 Gb/s的DPSK信号格式转换及解调后的误码性能。计算结果表明,通过设计转换器参数可获得低占空比RZ-DPSK信号,且转换后信号质量较高。实验结果表明格式转换功率代价较低,转换后RZ-DPSK信号时间抖动较原NRZ-DPSK信号减小。该格式转换器还适合光四相差分相移键控(DQPSK)的非归零到归零格式转换及多波长操作。A novel non-return-to-zero（NRZ） to return-to-zero（RZ） format converter for differential phase shift keying（DPSK） signal is proposed based on phase-intensity hybrid modulation and dispersion compensation.Influence on the format conversion of the converter parameters is theoretically analyzed and format conversion of 10-Gb/s degraded DPSK signal is investigated through numerical simulation.Experimental 10-Gb/s NRZ-DPSK signal to RZ-DPSK signal conversion and the bit error rate（BER） performance of the demodulated signals have also been demonstrated.Calculation results show that low duty cycle RZ-DPSK signal with high quality can be obtained through designing the converter.Experimental results show that the power penalty of the conversion is low and the timing-jitter of the RZ-DPSK signal is lower than that of the NRZ-DPSK signal.The format converter can also be applicable to multi-wavelength and differential quadrature phase shift keying（DQPSK） operation.

关 键 词：光通信 格式转换器 相位-强度混合调制 差分相移键控 

分 类 号：TN929.11[电子电信—通信与信息系统]