光DQPSK调制在不同色散补偿系统中的性能 / Performance analysis of optical DQPSK modulation formats in different dispersion compensation systems
- Resource Type
- Academic Journal
- Authors
- 王现彬; 贾英茜; 卢智嘉; 王超; 李宁; WANG Xian-bin; JIA Ying-qian; LU Zhi-Jia; WANG Chao; LI Ning
- Source
- 激光与红外 / Laser & Infrared. (1):80-83
- Subject
- 调制格式
正交相移键控
色散补偿
自相位调制
偏振模色散
modulation formats
differential quadrature phase shift keying
chromatic dispersion compensation
self-phase modulation
polarization mode dispersion
- Language
- Chinese
- ISSN
- 1001-5078
分析了光非归零-差分正交相移键控(NRZ-DQPSK)、33%归零-差分正交相移键控(33%RZ-DQPSK)和载波抑制归零-差分正交相移键控(CSRZ-DQPSK)三种调制格式的频域特性。并数字仿真了40Gbit/s的单信道光纤系统中三种调制格式在对色散(CD)进行后补偿、预补偿和对称补偿等三种补偿方式及考虑偏振模色散(PMD )和非线性效应情况下的传输性能。仿真结果表明,33%RZ-DQPSK对自相位调制(SPM)有最好的容忍度,但缓解PMD和CD的能力较弱;CSRZ-DQPSK在色散后补偿方式中对PMD和非线性效应具有最好的抑制能力。
The frequency domain characteristics of the optical Not-Return to Zero-Differential Quadrature Phase-Shift Key (NRZ-DQPSK),33% Return to Zero-DQPSK(33%RZ-DQPSK)and Carried Suppressed Return to Zero-DQPSK (CSRZ-DQPSK)modulation formats is analyzed.Considering the polarization mode dispersion (PMD)and nonlinear effect (self-phase modulation),the transmission performance of the three modulation formats is simulated in the pre-dispersion,post-dispersion and symmetrical-dispersion compensation systems in a 40Gbit/s single-channel optical fi-ber communication system.Simulation results show that the 33%RZ-DQPSK is good at tolerance of the self-phase modulation (SPM)but weak in the remission of PMD and CD.The CSRZ-DQPSK has the best ability to inhibit the PMD and nonlinear effect in the post-dispersion compensation system.