中文摘要：

根据流体力学的相关理论建立了毛细管拉制过程的简化模型.首先通过理论计算,分析了毛细管制作中的各种工艺参量,如控制参量、设备参量、预制棒结构参量等,对最终毛细管结构的影响.在本文讨论的工艺下,毛细管结构的相对缩塌不可避免,而工艺参量的调整仅可以在一定程度上改善结构的变化.最后通过具体的拉制实验与理论计算进行了比较分析,二者取得了很好的一致性,验证了计算模型的可靠性.相关结论可推广到光子晶体光纤的制作中,有很好的工艺参考价值.

英文摘要：

A simplified fluid - mechanics model is developed for the drawing of silica capillaries. Calculations are carried out to predict the influence of the technical parameters on the final geometry of the capillaries. Geometrical collapse is inevitable when drawing capillaries, and active control of the parameters only helps to some extent in tuning the final structures. Drawing experiments were performed to check the theoretical calcualtions. Good agreement was obtained, which certified the validity of the model. The predictions provide valuable practical information for the fabrication of photonic crystal fibers.