Technical sensitiveness in the rheological manufacture progress of fused taper coupler
Technical sensitiveness in the rheological manufacture progress of fused taper coupler
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发表时间：
2005
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通讯作者：
Zhong Jue
中科院分区：
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作者：
Zhong Jue
通过理论和实验研究，建立了熔融拉锥过程中光纤耦合器的粘弹性力学模型，实现了非均匀温度场下的数值分析。结果表明，拉丝速度和熔融温度等流变参数对光纤耦合器的应力分布和性能有很大影响，尤其是熔融温度的影响。在同一截面上，熔化温度每变化5℃，最大应力值变化30%，应力差变化20%。温度梯度变化3%，应力差变化90%。在现有流变工艺条件下，光纤耦合器易产生结晶、微裂纹等流变缺陷。现有的流变制造技术和设备难以实现微结构和折射率的均匀分布。
Through theoretical and experimental research, the viscoelastic mechanical model of optical fiber coupler in the process of fused biconical taper was established, with which, the numerical analysis under non-uniform temperature field was realized. The results show that 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 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%. Under the present condition of rheological technology, the optical fiber coupler is prone to generating rheological defects such as crystallizations and microcrack. It is difficult to realize uniform distribution of microstructure and refractive index with the present rheological manufacture technology and equipment.