优化调制格式实现2560 km低代价无误码传输  

Optimal Modulation Formats for 2560 km Optical Transmission with Low-Power Penalty

作　　者：陈勇[1] 曹继红[1] 陈婷[1] 简水生[1] 

机构地区：[1]北京交通大学光波技术研究所,北京100044

出　　处：《光学学报》2006年第3期331-335,共5页Acta Optica Sinica

基　　金：国家自然科学基金重点项目(60337010);国家863计划(2001AA122012)资助课题

摘　　要：在单级调制器产生非归零码(NRZ)基础上,分析了利用双级调制器产生归零码(RZ)以及载波抑制归零码(CSRZ)的方法和特点。对非归零码,归零码和载波抑制归零码在以掺铒光纤放大器(EDFA)为单一的功率放大、以啁啾光纤光栅(CFBG)为色散补偿器的10Gb/s系统中的传输性能进行了计算机仿真并比较这三种调制码型的传输特性。同时在实际的2560km G.652光纤链路上利用上述三种调制格式以点对点形式进行了8×10Gb/s传输实验,通过适当控制线路的功率分配以及合理安排系统的色散补偿,实现了三种调制格式的无电中继条件下的零误码传输。计算机仿真和实际实验结果进一步表明,载波抑制归零码的采用有利于优化系统的传输性能,降低传输代价,载波抑制归零码在上述配置的实际传输系统中无误码传输2560km功率代价仅为2.5dB。Based on the analysis of implementation method of NRZ, RZ and CSRZ formats, the transmission performance of the 10 Gb/s system with these different formats mentioned above was compared by numerical simulation, respectively. In this simulated system the EDFA was used as the solo amplifier and the CFBG was served as the solo dispersion compensator, A practical 8 × 10 Gb/s transmission experiment with CSRZ formats in straight line was also conducted and only 2.5 dB power penalty was cost after 2560 km transmission with error-free code. The experimental results show CSRZ will help to optimize the Performance of the CFBG-based system greatly.

关 键 词：光通信技术 长距离光传输 调制码型 无电中继 无误码 低功率代价 

分 类 号：TN929.11[电子电信—通信与信息系统]