In this article, we present an investigation of a multimode fiber interferometer based on a multimode gradient index perfluorinated polymer fiber. The interferometric response of the polymer fiber was investigated for fiber lengths of 20, 80, and 400 m when fibers were subjected to different perturbation types, such as temperature and strain. The results were theoretically investigated using the averaged characteristics approach and compared with those for silica fiber. Practical features specific to polymer fiber multimode interferometers are discussed. The averaged transfer function was measured and compared with theory at two wavelengths. The influence of fiber length on the interferometer's properties was investigated.

中文翻译：

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基于渐变折射率聚合物CYTOP光纤的多模光纤干涉仪

在本文中，我们对基于多模梯度折射率全氟化聚合物光纤的多模光纤干涉仪进行了研究。当纤维受到不同的扰动类型（如温度和应变）时，聚合物纤维的干涉响应被研究为 20、80 和 400 m 的纤维长度。使用平均特性方法对结果进行了理论研究，并与石英光纤的结果进行了比较。讨论了聚合物光纤多模干涉仪特有的实用功能。在两个波长处测量平均传递函数并与理论进行比较。研究了光纤长度对干涉仪性能的影响。