We report for the first time the resurgence of regenerated fiber Bragg gratings (RFBGs) useful for ultra-high temperature measurements exceeding 1400 °C. A detailed study of the dynamics associated with grating regeneration in six-hole microstructured optical fibers (SHMOFs) and single mode fibers (SMFs) was conducted. Rapid heating and rapid cooling techniques appeared to have a significant impact on the thermal sustainability of the RFBGs in both types of optical fibers reaching temperature regimes exceeding 1400 °C. The presence of air holes sheds new light in understanding the thermal response of RFBGs and the stresses associated with them, which governs the variation in the Bragg wavelength.

中文翻译：

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可再生的再生光纤布拉格光栅和热退火技术，可用于超过1400°C的超高温传感

我们首次报告了再生纤维布拉格光栅（RFBG）的兴起，可用于超过1400°C的超高温测量。对六孔微结构光纤（SHMOF）和单模光纤（SMF）中与光栅再生相关的动力学进行了详细研究。快速加热和快速冷却技术似乎对两种温度超过1400°C的光纤中的RFBG的热可持续性都有重大影响。气孔的存在为理解RFBG的热响应以及与之相关的应力提供了新的思路，而这些应力决定了布拉格波长的变化。