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A Low-Cost High-Temperature Sensor Based on Long-Period Fiber/Microfiber Gratings by Local Fictive Temperature Modification
Journal of Chemistry ( IF 3 ) Pub Date : 2020-06-11 , DOI: 10.1155/2020/9076874
Guorui Zhou 1 , Chuanchao Zhang 1 , Xiufang Xie 2 , Yi Wan 3 , Caizhen Yao 1 , Jun Liu 2 , Longfei Niu 1 , Xinxiang Miao 1 , Hai Zhou 1 , Xiaodong Jiang 1 , Shizhen Xu 3 , Haibing Lv 1
Affiliation  

A high temperature-sensitive long-period fiber grating (LPFG) sensor fabricated by the local fictive temperature modification is proposed and demonstrated. High-frequency CO2 laser pulses scan standard single-mode fiber (SMF), and the modification zones extended to the core of SMF. Experimental results demonstrate that the LPFG temperature sensors with 600 μm grating period and 32 period numbers offer the average sensitivity of 0.084 nm/C in the temperature range of room temperature (RM) to 875°C. The LPFGs fabricated here show exponential change in terms of the spectral wavelength shift versus changes in temperature. In addition, the maximum temperature sensitivity of 0.37 nm/C is achieved by employing long-period microfiber grating (LPMFG), fabricated by the microheater brushing technique and the local fictive temperature modification. LPMFG sensor exhibits better temperature characteristics due to a thinner diameter.

中文翻译:

基于局部虚拟温度修正的长周期光纤/超细光纤光栅的低成本高温传感器

提出并演示了一种通过局部虚拟温度修改制造的高温敏感长周期光纤光栅(LPFG)传感器。高频 CO2 激光脉冲扫描标准单模光纤 (SMF),修改区扩展到 SMF 的核心。实验结果表明,具有 600 μm 光栅周期和 32 个周期数的 LPFG 温度传感器在室温 (RM) 至 875°C 的温度范围内提供 0.084 nm/C 的平均灵敏度。这里制造的 LPFG 在光谱波长偏移与温度变化方面显示出指数变化。此外,通过采用微加热器刷涂技术和局部虚拟温度修改制造的长周期微纤维光栅(LPMFG),实现了0.37 nm / C的最大温度灵敏度。
更新日期:2020-06-11
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