Zhang Fan, Bunge Christian-A, Petermann Klaus
Fachgebiet Hochfrequenztechnik, Technische Universität Berlin, D-10587 Berlin, Germany.
Opt Lett. 2006 Apr 15;31(8):1038-40. doi: 10.1364/ol.31.001038.
Self-phase modulation and intrachannel cross-phase-modulation- (IXPM) induced nonlinear phase noise is investigated by the variational method. IXPM can cause a considerable increase of phase noise. We show, however, that IXPM leads to a partial correlation between the phase noises of adjacent pulses, which tends to reduce the influence of nonlinear phase noise in return-to-zero differential phase-shift keying transmission. In highly dispersive transmission systems, intrachannel four-wave mixing-induced differential phase fluctuations are typically larger than differential nonlinear phase noise. The analysis is validated by Monte Carlo simulation.
采用变分法研究了自相位调制和信道内交叉相位调制（IXPM）引起的非线性相位噪声。IXPM会导致相位噪声显著增加。然而，我们表明，IXPM会导致相邻脉冲的相位噪声之间存在部分相关性，这反过来又倾向于降低归零差分相移键控传输中非线性相位噪声的影响。在高度色散的传输系统中，信道内四波混频引起的差分相位波动通常大于差分非线性相位噪声。通过蒙特卡罗模拟验证了该分析。
