Compact fiber biocompatible temperature sensor based on a hermetically-sealed liquid-filling structure.
Compact fiber biocompatible temperature sensor based on a hermetically-sealed liquid-filling structure.
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DOI：
10.1364/oe.25.029597
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发表时间：
2017-11
期刊：
影响因子：
3.8
通讯作者：
Kunjian Cao;Yi Liu;S. Qu
中科院分区：
文献类型：
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作者：
Kunjian Cao;Yi Liu;S. Qu
基于密封液体填充法布里-珀罗 (FP) 腔的紧凑而坚固的光纤温度传感器是通过低成本但高效的工艺制造的，包括熔接、液体注入和熔融拉锥。由于乙醇的热光学系数（TOC）较高，FP腔内的光程差（OPD）随温度变化剧烈，从而引起反射光谱的剧烈波长漂移。同时，乙醇的冰点较低，使得光纤传感器具有检测零下温度的能力。结果，在 -5 °C 至 30 °C 范围内实现了高达 429 pm/°C 的线性灵敏度。此外，我们的光纤温度传感器还表现出快速的响应时间、良好的重复性和稳定性。这种温度传感器的生物相容性结构、低制造成本和高性能为其生物应用提供了潜力。
A compact and robust fiber temperature sensor based on a hermetically-sealed liquid-filling Fabry-Perot (FP) cavity was fabricated by low-cost but efficient processes, including fusion splicing, liquid injection, and fused tapering. Owing to the high thermal optical coefficient (TOC) of the ethanol, the optical path difference (OPD) in the FP cavity varied strongly with temperature, which consequently induced a drastic wavelength shift of the reflection spectrum. Meanwhile, the low freezing point of the ethanol caused the fiber sensor to have the ability of detecting the sub-zero temperatures. As a result, a linear sensitivity as high as 429 pm/°C was achieved in the range between -5 °C and 30 °C. In addition, our fiber temperature sensor also exhibited rapid response time, good repeatability, and stability. The biocompatible structure, low fabrication cost, and high performance of such a temperature sensor can provide it potential for biological applications.