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Sensors 2018, 18(7), 2192; https://doi.org/10.3390/s18072192

Investigation of A Slow-Light Enhanced Near-Infrared Absorption Spectroscopic Gas Sensor, Based on Hollow-Core Photonic Band-Gap Fiber

State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, 2699 Qianjin Street, Jilin University, Changchun 130012, China
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Received: 3 May 2018 / Revised: 20 June 2018 / Accepted: 2 July 2018 / Published: 7 July 2018
(This article belongs to the Section Physical Sensors)
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Abstract

Generic modeling and analysis of a slow-light enhanced absorption spectroscopic gas sensor was proposed, using a mode-tuned, hollow-core, photonic band-gap fiber (HC-PBF) as an absorption gas cell. Mode characteristics of the un-infiltrated and infiltrated HC-PBF and gas absorption enhancement of the infiltrated HC-PBF were analyzed. A general rule of microfluidic parameters for targeting different gas species in the near-infrared was obtained. Ammonia (NH3) was used as an example to explore the effects of slow light on gas detection. The second harmonic (2f) signal and Allan deviation were theoretically investigated based on the derived formulations. View Full-Text
Keywords: photonic band-gap fiber; infrared absorption spectroscopy; gas sensor; slow light photonic band-gap fiber; infrared absorption spectroscopy; gas sensor; slow light
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Wu, Z.-F.; Zheng, C.-T.; Liu, Z.-W.; Yao, D.; Zheng, W.-X.; Wang, Y.-D.; Wang, F.; Zhang, D.-M. Investigation of A Slow-Light Enhanced Near-Infrared Absorption Spectroscopic Gas Sensor, Based on Hollow-Core Photonic Band-Gap Fiber. Sensors 2018, 18, 2192.

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