四种级联差分相位调制码的100 Gbit/s传输  

Four Serial Differential Phase-Shift Keying Modulation Formats for 100 Gbit/s Tansmission Aplications

作　　者：邵宇丰[1] 李佳[1,2] 程黎黎[1] 皮雅稚[1] 文双春[1] 陈林[1] 

机构地区：[1]湖南大学计算机与通信学院微纳光电及器件教育部重点实验室,湖南长沙410082 [2]湖南人文科技学院,湖南娄底417000

出　　处：《中国激光》2009年第3期574-580,共7页Chinese Journal of Lasers

基　　金：湖南大学优秀博士论文资助对象计划;高等学校博士学科点专项科研基金(20040532005);国家教育部新世纪优秀人才支持计划资助项目

摘　　要：在级联相位调制的100 Gbit/s光信号传输系统中,对差分相移键控非归零码(NRZ-DPSK)、差分相移键控归零码(RZ-DPSK)、差分四相相移键控非归零码(NRZ-DQPSK)和差分四相相移键控归零码(RZ-DQPSK)进行了比较研究。当四种信号通过90 km的标准单模光纤(SMF)和16 km的色散补偿光纤(DCF)传输后,在满足相同入纤功率的条件下,NRZ-DQPSK信号具有最高的色散容限;如果仅仅考虑一阶偏振模色散(PMD),RZ-DQPSK信号具有最优的抗偏振模色散特性;当入纤功率在0～10 dBm的范围内调节时,RZ-DPSK信号具有最好的非线性容忍度;最后比较了四种相位调制码型传输后通过不同带宽的三阶高斯滤波器后的接收性能,得出滤波器带宽值大于125 GHz后,NRZ-DPSK信号的接收性能最佳。In the 100 Gbit/s optical signal transmission system, by comparing the transmission characteristics of the four serial phase modulation formats with those of NRZ-DPSK, RZ-DPSK, NRZ-DQPSK, and RZ-DQPSK, respectively, we show that, when each signal was transmitted over 106 km optical SMF+DCF, the NRZ-DQPSK signal has the highest chromatic dispersion tolerance when the fiber input powers of four phase modulation formats are same. If only considering first order polarization mode dispersion (PMD), RZ-DQPSK has the largest first order PMD tolerance. When adjusting the fiber input power from 0-10 dBm, RZ-DPSK format is very robust against nonlinearities. At last, each phase modulation signal was launched into a third-order Gaussian optical bandpass filter (OBPF) with different bandwidth, and their receipt performance was compared. In addition, the NRZ-DPSK signal has the best transmission performance, if it was launched into a third-order Gaussian optical bandpass filter placed with beyond 125 GHz bandwidth.

关 键 词：光通信 相位调制 非归零 归零 100 Gbit/s 

分 类 号：TN929.11[电子电信—通信与信息系统]