The Gordon-Mollenauer Effect in 112 Gbit/s DP-QPSK Systems

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2013,（8）
• 页码范围: 70-73
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/30/8/084203

摘要

Gordon and Mollenauer (G-M) proposed in 1990 that the interplay between the nonlinear Kerr effect and amplified spontaneous emission noise can generate an enhanced level of noise and degrade the performance of optical phase-modulated systems.We systematica1y investigate the G-M effect in 112 Gbit/s coherent dual polarization quaternary phase shift keying (DP-QPSK) systems through comprehensive simulation.The results show that in the presence or absence of inline dispersion compensation,the G-M effect will seriously damage the system performance.Some of our important conclusions are listed as follows:with the increase in the input power into each span,the G-M effect is enhanced simultaneously;the smaller the span length,the stronger the G-M effect caused by more inter-span interaction;for non-zero dispersion-shifted fibers,different coefficient values will cause a similar amount of G-M effect penalty;by comparing the system performance with different dispersion compensation ratios,one can conclude that different residual dispersions of the same magnitude,no matter whether they are under-compensated or over-compensated,can derogate the overall system performance to a similar degree.In brief,the G-M effect cannot be ignored.We aso have a short discussion on how to reduce and compensate for the G-M effect in DP-QPSK systems.