中文摘要：

通过理论分析和实验，在熔化双性人的进程的光纤维 coupler 的粘弹性的机械模型圆锥形逐渐变细被建立，并且不一致的温度地里的数字分析被做。结果证明 rheologicalparameters 例如拉速度和熔化温度，在压力分发和光纤维 coupler 的性能上有巨大的影响，特别熔化温度的影响。由 5 ℃的熔化温度的变化能在一样的生气的节在 20% 导致最大的压力 by30% 和压力差别的变化。由在在 90% 的压力差别的变化的 3%can 结果的温度坡度的变化。处于 rheologicaltechnology 的现在的条件，象结晶化和微裂缝那样的逻辑缺点是容易的在光纤维 coupler 产生的变阻器。

英文摘要：

Through theoretical analysis and experiments, the viscoelastic mechanical model of optical fiber coupler in the process of fused biconical taper was established, and the numerical analysis in non-uniform temperature field was made. The results show that the rheological parameters, such as drawing speed and fused temperature, have a tremendous influence on stress distribution and performance of optical fiber coupler, especially the influence of fused temperature. The change of fused temperature by 5 ℃ can lead to the change of the maximum stress by 30% and stress difference by 20% in the same cross section. The change of temperature gradient by 3% can result in the change of stress difference by 90%. In the present condition of rheological technology, rheological defects such as crystallizations and microcracks are easy to generate in the optical fiber coupler.