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利用对称分步傅里叶法,数值模拟了光孤子在随机双折射光纤中的传输特性,研究了孤子间的相互作用及其非线性增益控制。结果表明,随机双折射使得孤子传输的两偏振分量脉冲强度会随着传输距离有强弱不规则的变化,但是两偏振分量的强度变化互相补充,合成孤子强度能够稳定地传输;随机双折射也增强了孤子间相互作用,非线性增益可以有效地抑制随机双折射对孤子传输相互作用的影响,使得原本会产生交叠走离的相邻孤子传输不偏离原来的时间槽,实现了对偏振模色散良好的控制作用。
The symmetric step Fourier method is used to numerically simulate the propagation properties of solitons in random birefringent fibers. The interaction between solitons and their nonlinear gain control are also studied. The results show that the random birefringence makes the intensity of the two polarization components transmitted by the solitons vary irregularly with the transmission distance, but the intensities of the two polarization components complement each other and the intensity of the composite soliton can be transmitted stably. The random birefringence Which enhances the interaction between solitons. The nonlinear gain can effectively suppress the influence of random birefringence on the soliton transmission interaction, so that the adjacent solitons that would otherwise have overlapped and divergent travel do not deviate from the original time slot, Dispersion good control.