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首页> 外文期刊>Optical engineering >Dispersion limits in the design of small-mode-area photonic crystal fibers
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Dispersion limits in the design of small-mode-area photonic crystal fibers

机译：小模光子晶体光纤设计中的色散极限

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摘要

The generally accepted view is that photonic crystal fibers (PCFs) with a small effective mode area allow the control of chromatic dispersion in the near-infrared region. For this purpose, a silica index guiding PCF with hexagonal cladding is investigated to find its dispersion limitation. In addition, chromatic dispersion is entirely controlled by only three structural parameters; the influence of each structural parameter is examined and described in detail. Understanding the mechanism governing chromatic dispersion is necessary not only for the fiber design and dispersion tailoring, but also to predict the potential manufacturing tolerances. In spite of the fact that the fiber with specific parameters matches its relative dispersion slope to that of standard single-mode fibers over a large range of operating wavelengths, the negative dispersion parameter is not higher than those in commercially available dispersion-compensating fibers. Therefore, the fiber parameters are modified to find the balance between the operating bandwidth and the high negative dispersion parameter. The limit value for the dispersion parameter is found to be -1600 ps • nm~(-1) • km~(-1) at 1550 nm, where the dispersion slope is achieved for the 120-nm wide band. We predict that the negative dispersion parameter cannot be higher in small effective mode area PCFs operating over a bandwidth larger than the one considered here. The results are calculated by the full-vectorial finite difference frequency domain method. The simulation model is verified by convergence testing.
机译：普遍接受的观点是，有效模式面积小的光子晶体光纤（PCF）可以控制近红外区域中的色散。为此，研究了具有六角形包层的二氧化硅折射率引导PCF，以发现其色散限制。另外，色散仅由三个结构参数完全控制。检查并详细描述了每个结构参数的影响。理解控制色散的机制不仅对于光纤设计和色散调整是必要的，而且对于预测潜在的制造公差也是必要的。尽管具有特定参数的光纤在较大的工作波长范围内其相对色散斜率与标准单模光纤的相对色散斜率相匹配，但负色散参数不高于市售色散补偿光纤中的负色散参数。因此，修改光纤参数以找到工作带宽和高负色散参数之间的平衡。色散参数的极限值在1550 nm处为-1600 ps•nm〜（-1）•km〜（-1），在120 nm宽带处实现了色散斜率。我们预测，在带宽大于此处考虑的带宽的小有效模式区域PCF中，负色散参数不能更高。通过全矢量有限差分频域方法计算结果。通过收敛测试验证了仿真模型。

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  • 来源
    《Optical engineering》 |2014年第10期|105103.1-105103.8|共8页
  • 作者

    Richard Zeleny; Michal Lucki;

  • 作者单位

    Czech Technical University in Prague, Faculty of Electrical Engineering, Department of Telecommunication Engineering, Technicka 2, 166 27 Prague 6, Czech Republic;

    Czech Technical University in Prague, Faculty of Electrical Engineering, Department of Telecommunication Engineering, Technicka 2, 166 27 Prague 6, Czech Republic;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    photonic crystal fiber; small mode area; fiber dispersion; fiber properties;

    机译：光子晶体光纤;小模式区域纤维分散纤维性质;

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