三种载波抑制归零码光调制格式性能  

Properties of three types of carried-suppressed return-to-zero optical modulation formats

作　　者：王现彬[1,2] 李宁[1] 卢智嘉[1] 杨洁[1] 曹鹤飞[1] 

机构地区：[1]石家庄学院电气信息工程系,河北石家庄050000 [2]河北工业大学信息工程学院,天津300401

出　　处：《红外与激光工程》2014年第11期3694-3698,共5页Infrared and Laser Engineering

基　　金：河北省自然科学基金(F2013106079);河北省科技计划(13220344);石家庄市科学技术研究与发展指导计划(11113481)

摘　　要：首先分析了基于载波抑制归零码的光载波抑制归零-开关键控(CSRZ-OOK)、载波抑制归零-差分相移键控(CSRZ-DPSK)和载波抑制归零-差分正交相移键控(CSRZ-DQPSK)三种光调制格式的时域和频域特性,并数字仿真了其在40 Gbit/s单信道光纤系统中的传输性能。以Q值、眼图和误码率(BER)作为性能评价指标,研究了这三种调制格式对色散(CD)、偏振模色散(PMD)和非线性效应的抑制作用。结果表明:CSRZ-DQPSK相对于CSRZ-OOK、CSRZ-DPSK对色散、偏振模色散和非线性效应有非常好的容忍能力。The time and frequency domain characteristics of three types of modulation formats, Carrier﹣Suppressed Return to Zero﹣On Off Keying （CSRZ- OOK）, Carrier﹣Suppressed Return to Zero﹣Differential Phase Shift Keying （CSRZ- DPSK） and Carrier﹣Suppressed Return to Zero﹣Differential Quadrature Phase Shift Keying （CSRZ- DQPSK） based on carrier﹣suppressed return to zero formats, were analyzed firstly and the transmission performance of the three types of modulation formats was simulated in 40 Gbit/s single channel optical fiber transmission system. The tolerance of the three types of modulation formats to chromatic dispersion （CD）, polarization mode dispersion （PMD） and nonlinear effect was evaluated by means of Q value, eye diagrams and bit error rate （BER）. The results show that CSRZ- DQPSK has very good tolerance to chromatic dispersion, polarization mode dispersion and nonlinear effect compared with CSRZ- OOK and CSRZ- DPSK.

关 键 词：调制格式 差分正交相移键控 色散 非线性效应 偏振模色散 

分 类 号：TN929.11[电子电信—通信与信息系统]