共查询到19条相似文献,搜索用时 361 毫秒
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利用数值方法研究了20Gbit/s的偏振模色散和三阶色散对孤子脉冲串传输的影响,计算了孤子脉冲串的最大传输距离。利用眼图对传输系统的性能进行了评价。 相似文献
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双折射光纤中三阶色散对孤子脉冲传输的影响 总被引:3,自引:1,他引:2
研究了孤子脉冲在双折射光纤零色散点附近的传输特性,应用数值分析方法,讨论了在双折射光纤中,三阶色散对孤子脉冲传输的影响。在输入脉冲两个偏振分量强度相等的情况下,分析发现孤子捕获条件没有变化,但是,脉冲一个偏振分量迅速展宽,另一偏振分量展宽变慢。同时,脉冲的形状、光谱在两个偏振分量中都呈现出不对称性。在一定的条件下,孤子的辐射波主要集中在一个偏振分量中。 相似文献
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Yushu Liu 《International Journal of Infrared and Millimeter Waves》1999,20(8):1541-1548
Stability of soliton propagation with third-order dispersion is analyzed by using self-companying operator method. The results show : third-order dispersion leads to time jitters in arrival, and disrupts the stability of soliton transmission. Enhancing the strength of filter can effectively suppress the influence. 相似文献
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在色散位移光纤中,研究了三阶色散影响下同相和反相二阶孤子之间的互作用,分析了同相和反相二阶孤子对衰变后时域波形和频域频移的变化,发现三阶色散使二阶孤子分裂出一大一小两个不同振幅的基阶孤子,并彼此分离,但孤子对中心频率频移量却减小。通过采用非线性增益控制的方法可以有效抑制二阶孤子间的互作用,使孤子保型传输而不发生衰变。同时通过周期性改变三阶色散系数,可以减小三阶色散的不利影响,抑制孤子中心频率的频移,使孤子对不偏离原来时间槽,稳定孤子传输。 相似文献
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采用自相似分析方法,基于常系数高阶色散的Ginzburg-Landau方程,通过分离变量法得出了高阶色散效应自相似脉冲演化的解析解,给出了自相似脉冲的振幅、相位、啁啾以及脉冲宽度的一般表达式.研究表明,在增益光纤的二阶正常色散区域,同时考虑高阶色散和增益色散双重效应影响下演化的自相似孤子脉冲仍然保持线性啁啾;振幅解析解的三阶色散效应显著.这与数值计算的结果非常一致.
关键词:
三阶色散
Ginzburg-Landau方程
自相似脉冲
二阶正常色散 相似文献
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1 Introduction Compressed pulsesfromdispersion decreasingfibers[1] (DDFs)haveapplicationsintime division multiplexedopticalcommunicationsatratesashighas 1Tbit/s[2 ] ,inall opticalsamplingsystems[3] ,andinsupercontinuumgeneration[4] .Generationofpedestal freepulseso… 相似文献
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Previous work have shown that the combined effects of negative third-order dispersion (TOD) and Raman self-scattering (RSS) can significantly enhance soliton compression in dispersion decreasing fibers (DDFs). In this paper, the effects of the negative TOD coefficient and the effective amplification of DDF′s on the performance of soliton compression are investigated. It is shown that for a given initial soliton width and a given effective amplification, there exists an optimum value of the negative TOD coefficient of the DDF at which the enhancement in soliton compression is maximum. It is also shown that the compression enhancement saturates when the effective amplification exceeds a certain value, which has been explained as a compromise between the higher-order effects induced increase of the ratio of input to output group-velocity dispersion coefficients of the DDF and the TOD induced non-adiabatic compression characteristics. The dependence of the compression enhancement on the initial soliton width have also be studied and the scheme is found works well for solitons with initial widths less than 3 ps. 相似文献
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The influence of stochastic high-order perturbations on soliton transmission system is studied by self-companying operator method. Arrival time jitters variation induced by stochastic third-order dispersion is approximately proportional to three powers of transmission distance, that by stochastic nonlinear dispersion and self-steeping are approximately proportional to the transmission distance. 相似文献
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