为了研究光子带隙光纤中纤芯环掺杂浓度的百分比对光纤传输特性的影响，利用全矢量有限元法在纤芯环掺杂浓度的百分比为1%~5%的条件下对7孔光子带隙光纤纤芯环掺杂和19孔光子带隙光纤纤芯环掺杂两种结构进行了仿真，比较了两种结构的纤芯模能量分布曲线，并且给出了19孔光子带隙光纤在不同的纤芯环掺杂浓度的百分比下，光纤带宽、色散、有效模面积和有效折射率的分布曲线图。结果表明，19孔光子带隙光纤比7孔光子带隙光纤具有更强的限光能力，且纤芯环掺杂浓度的百分比对光子带隙光纤的传输性能有显著的影响。

In order to find out the influence of the percentage of doping concentration of core surround on transmission characteristics in photonic band gap photonic crystal fibers(PBG-PCF), simulations on 7-cell PBG-PCF core surround doping and 19-cell PBG-PCF core surround doping were carried out by using full-vector finite element method under the condition of the percentage of doping concentration between 1% and 5%. The core-confined energy of these two structures were compared, and the influence of the percentage of doping concentration on optical fiber transmission characteristics in 19-cell PBG-PCF was investigated, such as the distribution curves of bandwidth, dispersion, effective mode area and effective mode index in different the percentage of doping concentration. The results show that the light limiting capacity of 19-cell PBG-PCF is better than that of 7-cell PBG-PCF, and the percentage of doping concentration has notable influence on optical fiber transmission characteristics.