光子晶体光纤的色散特性研究-光学专业论文.docxVIP

I I 摘 要 由于 PCF 包层中的空气孔有多种排列方式以及多变的填充材料，因此，PCF 能够表 现出不同的导光特性。并且有些特性是普通光纤所不具备的，所以扩大了 PCF 的实际 应用范围。并且 PCF 具有许多优异的特性，从而使得 PCF 具有广泛的实际应用前景与 巨大的市场价值。PCF 的发展不仅能够推动光电子、光通信等领域的发展，还能够加快 信息化社会的建设。因此，本文展开了对光子晶体光纤的色散特性的研究。 具体研究内容如下： 采用 Rsoft 软件，分析了六边形包层结构的光子晶体光纤，主要对色散产生影响 的参数分别是孔间距、孔直径和占空比。分别研究了每种变量对光子晶体光纤色散的 影响；接着改变每层空气孔直径大小，计算出每层孔直径大小对色散的影响。分析讨 论结果，最后对结构参数进行了优化，找出了最优化近零平坦色散光子晶体光纤结构， 其在1.31 ?m ～1.58?m 波段内，色散系数在 ??0.1～ 0.58 ps /(km ??nm )之间，通过理 论分析出空气孔直径及其孔间距大小对其色散特性的影响。 然后介绍几种测量光子晶体光纤色散参数的实验方案，最后采用了实验室的方案， 使用色散分析仪，测量了光子晶体光纤的色散。在1.5 ?m ～1.7?m 波段内，其色散曲 线是近零且比较平坦。对光子晶体光纤的色散进行了详细的研究与讨论，为以后的研 究奠定的基础。 关键词：光子晶体光纤 色散 光束传播法 色散测量 II II ABSTRACT Since PCF cladding air holes arranged in a various of ways and a filling materials changing, therefore, PCF can exhibit different photoconductive characteristics. And some characteristics are not available in traditional fibers, thus expanding the scope of application of PCF. And the PCF has many excellent characteristics, so that the PCF has a broad application prospects and huge market value. The development of PCF can not only promote the development of optoelectronics, optical communications and other fields, but also to accelerate the construction of information society. Therefore，this paper carried out the dispersion properties of photonic crystal fibers study. The concrete research contents are as follows: Using the Rsoft to analyze the hexagonal photonic crystal fiber cladding structure, the main impact on the dispersion parameters were hole spacing, hole diameter and duty cycle. The effect of each variable separately on photonic crystal fiber dispersion; then change each air hole diameter, hole diameter to calculate the impact of the size of each dispersion. Analysis results of the discussions, the final structure parameters were optimized to find the optimal near-zero flattened dispersion photonic crystal fiber structure, it is within 1.31 ?m ～ 1.58?m band dispersion coefficient between ??0.1 ～ 0.58 ps /(km nm ) ， the theoretical