We report for the first time, to the best of our knowledge, regenerated polymer optical fiber Bragg gratings (RPOFBGs) in ZEONEX-based polymer optical fibers (POFs). The regeneration temperature can be adjusted using a heat treatment process on the POF before FBG inscription, enabling a scalable improvement of the thermal stability of the RPOFBGs. Thermal sustainability of the RPOFBGs at high temperature conditions was investigated for their prolonged use in diverse environments. Furthermore, these RPOFBGs can withstand strain levels up to 2.8% while maintaining a good linearity, even at temperature of 110°C. The RPOFBGs are capable of short-term operation at elevated temperatures of up to 132°C, which is the standard temperature for steam sterilization with at least a 4 min exposure period. The distinction in the morphologies of the two grades of ZEONEX (E48R and 480R, ZEON Corp.) used to fabricate the optical fiber together with the characteristics of UV irradiated and regenerated gratings is explained using micro-Raman spectroscopy. Collectively, these findings provide new heights for long-term operation of POF Bragg gratings (POFBGs) at elevated temperature environments and would be applicable to a wide range of disciplines.

中文翻译：

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用于高温测量的热处理再生聚合物光纤布拉格光栅

据我们所知，我们首次报道了基于 ZEONEX 的聚合物光纤 (POF) 中的再生聚合物光纤布拉格光栅 (RPOFBG)。再生温度可以在 FBG 铭刻之前使用 POF 上的热处理工艺进行调整，从而可扩展地提高 RPOFBG 的热稳定性。研究了 RPOFBG 在高温条件下的热可持续性，以便在不同环境中长期使用。此外，这些 RPOFBG 可以承受高达 2.8% 的应变水平，同时保持良好的线性度，即使在 110°C 的温度下也是如此。RPOFBG 能够在高达 132°C 的高温下进行短期操作，这是蒸汽灭菌的标准温度，暴露时间至少为 4 分钟。使用显微拉曼光谱解释了用于制造光纤的两个等级的 ZEONEX（E48R 和 480R，ZEON Corp.）的形态差异以及紫外线照射和再生光栅的特性。总的来说，这些发现为 POF 布拉格光栅 (POFBG) 在高温环境下的长期运行提供了新的高度，并将适用于广泛的学科。