基于级联调制器的四进制幅移键控非归零码到归零码格式转换器  

Non-Return-to-Zero to Return-to-Zero Format Converter for Quaternary Amplitude Shift Keying Signal Based on Cascaded Modulators

作　　者：余文科[1] 娄采云[1] 赵晓凡[1] 陆丹[1] 陈健桦[1] 

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

出　　处：《光学学报》2011年第2期30-33,共4页Acta Optica Sinica

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

摘　　要：提出了一种全新的基于相位-强度级联调制器和色散补偿光纤(DCF)的四进制幅移键控(4-ASK)非归零码(NRZ)到归零码(RZ)格式转换方案。理论分析了新格式转换器的工作原理,并进行了20 Gb/s的四进制幅移键控NRZ到RZ的格式转换实验研究。结果表明,该方案能将四进制幅移键控NRZ信号转换为四进制幅移键控RZ信号,转换过程不改变信号波长,且转换后信号脉宽较窄、时间抖动较原信号小,该码型转换器还可以应用于多波长幅移键控信号的码型转换。A novel non-return-to-zero（NRZ） to return-to-zero（RZ） format converter for quaternary amplitude shift keying（4-ASK） signal is proposed based on phase-intensity modulators and one dispersion compensating fiber（DCF） module.The operation principle of the proposed converter is described theoretically.20-Gb/s NRZ-4-ASK signal to RZ-4-ASK signal conversion is also experimentally demonstrated.The results show that 20-Gb/s NRZ-4-ASK signal could be successfully converted to RZ-4-ASK signal without wavelength shift and the pulse width of the converted signal is narrow.The timing-jitter of the converted signal is lower than the original one.The format converter could also be applied to multi-wavelength amplitude shift keying conversion.

关 键 词：光通信 格式转换器 级联调制器 四进制幅移键控 

分 类 号：TN929.11[电子电信—通信与信息系统]