Ning Mao Bang, Wei Chen Wen, Liu Zhao Chun, Shi Yan, Yu Shen Chang, Zhong Jin Shang
Appl Opt. 2020 Jul 1;59(19):5693-5696. doi: 10.1364/AO.392423.
In this paper, a reflective fiber sensing system combined with a fiber loop ringdown technique for temperature detection is proposed. A fiber Bragg grating (FBG) with an initial center wavelength of 1543.33 nm was set as the sensor head. The experimental results showed that the average sensitivity of temperature was 1.003 µs/°C in the temperature range of 30-38°C, and the resolution was 0.007°C, which is 14 times better than the current FBG sensing demodulator. In addition, the system has the advantages of simple structure, low cost, and insensitivity to optical power fluctuation.
本文提出了一种结合光纤环衰荡技术的反射式光纤传感系统用于温度检测。将初始中心波长为1543.33nm的光纤布拉格光栅（FBG）设置为传感头。实验结果表明，在30-38°C温度范围内，温度的平均灵敏度为1.003µs/°C，分辨率为0.007°C，比目前的FBG传感解调器好14倍。此外，该系统具有结构简单、成本低以及对光功率波动不敏感的优点。
