Ultrashort Near-Infrared Fiber-Optic Sensors for Carbon Dioxide Detection
Ultrashort Near-Infrared Fiber-Optic Sensors for Carbon Dioxide Detection
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DOI：
10.1109/jsen.2015.2438063
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发表时间：
2015-09-01
影响因子：
4.3
通讯作者：
Wang, Alan X.
中科院分区：
文献类型：
--
作者：
Chong, Xinyuan;Kim, Ki-Joong;Wang, Alan X.
在本文中，我们报告了一个光纤二氧化碳（CO2）的近红外（IR）吸收传感器，只有8厘米的传感长度，涂敷纳米多孔金属有机骨架材料铜BTC（BTC =苯-1，3，5-三羧酸）。用氢氟酸腐蚀多模光纤去除包层和部分纤芯，产生较大的倏逝场，用于检测CO2吸附引起的近红外吸收。然后通过逐步逐层方法在ethced芯上生长厚度为100 nm的Cu-BTC薄膜。我们的实时测量结果表明，CO2的检测限优于500 ppm，总的响应时间为40秒的吸收和75秒的解吸。据我们所知，这是最短的近红外光纤传感器的CO2检测在1.57 μ m波长。
In this paper, we report a fiber-optic carbon dioxide (CO2) near-infrared (IR) absorption sensor with only 8-cm sensing length that is coated with nanoporous metalorganic framework material Cu-BTC (BTC = benzene-1,3, 5-tricarboxylate). The multimode optical fiber was etched by hydrofluoric acid to remove the cladding and part of the core, resulting in larger evanescent field to sense the near-IR absorption induced by the adsorbed CO2. The Cu-BTC thin film with 100 nm thickness was then grown onto the ethced core through a stepwise layer-by-layer method. Our real-time measurement results show that the CO2 detection limit is better than 500 ppm and the overall response time is 40 s for absorption and 75 s for desorption. To the best of our knowledge, this is the shortest near-IR fiber-optic sensor for CO2 detection at 1.57-mu m wavelength.