中国激光, 2012, 39 (s2): s205007, 网络出版: 2012-12-24
基于新型调制方案的PS-RZ-QPSK信号在高速光传输系统中的应用
Application of a Novel Modulation Scheme of PS-RZ-QPSK Signal in High-Speed Optical Transmission System
光通信 高速光传输系统 偏振切换正交相移键控 新型调制方式 相干接收 双偏振正交相移键控 optical communications high-speed optical transmission system polarization-switched quadrature phase shift keyin novel modulation scheme coherent detection dual-polarization quadrature phase shift keying
摘要
研究了偏振切换正交相移键控(PS-QPSK)和双偏振正交相移键控(DP-QPSK)信号的产生原理，理论分析了PS-QPSK信号的性能优势。针对偏振切换归零正交相移键控(PS-RZ-QPSK)信号，提出了一种新的调制方案，方案在保持PS-RZ-QPSK信号优势的同时减少了发送端使用的马赫曾德尔调制器(MZM)的数量，大大降低了发射机成本。通过仿真结果分析得出在相同比特率(84 Gb/s)和相同波特率(28 GBd)条件下，PS-RZ-QPSK比双偏振归零正交相移键控(DP-RZ-QPSK)信号具有更好的传输性能，验证了该方案的可行性。
Abstract
Modulation principle of dual-polarization quadrature phase shift keying (DP-QPSK) signal and polarization-switched quadrature phase shift keying (PS-QPSK) signal are demonstrated and advantages of PS-QPSK are proved in theoretically. A novel modulation scheme of PS-return-to-zero(RZ)-QPSK signal is proposed. The scheme reduces transmitter cost by less use of Mach-Zehnder modulator (MZM), but also presents similar performance as traditional structure for PS-RZ-QPSK. The simulation results indicate PS-RZ-QPSK can achieve a better transmission performance than DP-RZ-QPSK at the same bit rate (84 Gb/s) and baud rate (28 GBd), and prove the feasibility of novel modulation scheme.
徐蕾, 张阳安, 张锦南, 林密. 基于新型调制方案的PS-RZ-QPSK信号在高速光传输系统中的应用[J]. 中国激光, 2012, 39(s2): s205007. Xu Lei, Zhang Yang′an, Zhang Jinnan, Lin Mi. Application of a Novel Modulation Scheme of PS-RZ-QPSK Signal in High-Speed Optical Transmission System[J]. Chinese Journal of Lasers, 2012, 39(s2): s205007.
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