| 飞秒光纤光栅高温测量方法研究 |
| A high temperature measurement method using femtosecond fiber Bragg gratings |
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| 中文摘要: |
| 为了实现高温环境下温度的准确测量，利用飞秒激光制备的光纤布拉格光栅（Fiber Bragg Gratings， FBG）杰出的热稳定性，提出一种基于飞秒光纤光栅的高温测量方法。利用光纤热光系数、热膨胀系数与温度之间的依赖关系，建立了FBG中心波长?温度模型；由于该模型不存在解析解，利用单点中心波长?温度特解和四次多项式拟合温度?中心波长工作曲线。基于该工作曲线和预退火（1 000 ℃， 20 h）FBG在常温至900 ℃范围内进行温度测量实验，结果表明最大测量偏差不超过±2 ℃。本方法仅需标定单点中心波长?温度即可实现宽温度范围内的温度准确测量，简洁有效，在航空航天、核电冶金等领域中具有重要的研究和应用价值。 |
| 英文摘要: |
| In order to achieve accurate temperature measurement in high?temperature environments, a measurement method based on femtosecond fiber Bragg gratings (FBG) is proposed, utilizing the outstanding thermal stability of FBG fabricated by femtosecond lasers. A FBG central wavelength?temperature model was established based on the dependence of thermal optical coefficient and thermal expansion coefficient on temperature. Since there is no analytical expression for the model, the temperature?central wavelength working curve is fitted by using the single point specific solution of central wavelength?temperature and quartic polynomial. Based on this working curve and pre annealing (1 000 ℃, 20 h) FBG, temperature measurement experiments were conducted from room temperature to 900 ℃, and the results showed that the maximum measurement deviation was less than ±2 ℃. This method only needs to calibrate a single point central wavelength?temperature to achieve accurate temperature measurement over a wide temperature range. It is simple and effective, and has important research and application value in the fields such as aerospace, nuclear power metallurgy, etc. |
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| 中文关键词: 飞秒激光 光纤布拉格光栅 工作曲线 退火 高温测量 |
| 英文关键词:femtosecond laser fiber Bragg gratings working curve annealing high temperature measurement |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2023.05.01 |
| 引用本文：张鹏浩, 陈爽, 武洪波.飞秒光纤光栅高温测量方法研究[J].计测技术,2023,(5):. |
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