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短暂的气体诱导的微分折射率效应在正如绘制的空心光纤中

Thomas W Kelly, Shuichiro Rikimi, Ian A Davidson

|June 11, 2024

概括

空心纤维内部的气压在绘制后明显低于大气压. 这种压力差异会导致纤维衰减的短暂变化,影响特性,并且在制造过程中需要仔细考虑.

科学领域:

光纤技术是光纤技术的一种.
材料科学材料科学材料科学
光的物理学光的物理学

背景情况:

空心纤维 (HCF) 制造涉及在高温下绘制光学预成型.
内部气体压力用于控制HCF微结构,并在绘制过程中抵消表面张力.
在制造后,HCF中的内部气体压力被发现是亚大气压.

研究的目的:

为了研究制造后HCF衰减的短暂变化.
为了证明亚大气层内部气体压力对纤维特性的影响.
强调在HCF表征中考虑压力诱导效应的重要性.

主要方法:

理论建模考虑纤维绘图期间的热梯度和几何转换.
气体压力和折射率变化的计算模拟.
在制造的HCF上进行了实验性衰减测量.

主要成果:

在绘制的HCF的核心和外内确认了大气下气体压力.
气压的变化会导致纤维折射率的显著变化.
这些折射率变化导致在暴露在大气中时纤维衰减的短暂变化.

结论:

HCF内部和大气之间的压力差异会导致短暂的衰减变化.
为了准确地描述HCF,需要考虑这些依赖压力的效应.
长的拉长需要长时间的时间来使内部压力平衡到大气水平.

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