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Ultrashort Near-Infrared Fiber-Optic Sensors for Carbon Dioxide Detection

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https://ir.library.oregonstate.edu/concern/articles/2801pj25c

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  • 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-μm wavelength.
  • This is the publisher’s final pdf. The published article is copyrighted by Institute of Electrical and Electronics Engineers and can be found at: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=7361 ©2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
  • Keywords: Fiber optic sensor, metal-organic framework, near infrared absorption, gas sensor
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  • Chong, X., Kim, K. J., Ohodnicki, P., Li, E., Chang, C. H., & Wang, A. (2015). Ultra-Short Near-Infrared Fiber-Optic Sensors for Carbon Dioxide Detection. IEEE Sensors Journal, 15(9), 5327-5332. doi:10.1109/JSEN.2015.2438063
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  • 15
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  • 9
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  • This work was supported by the National Energy Technology Laboratory's ongoing research through RES under Contract DE-FE0004000.
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