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Proceedings Paper

Grapefruit photonic crystal fiber long period gratings sensor for DNT sensing application
Author(s): Chuanyi Tao; Jingke Li; Tenglong Zhu
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Paper Abstract

The detection of explosives and their residues is of great importance in public health, antiterrorism and homeland security applications. The vapor pressures of most explosive compounds are extremely low and attenuation of the available vapor is often great due to diffusion in the environment, making direct vapor detection difficult. In reality bomb dogs are still the most efficient way to quickly detect explosives on the spot. Many formulations of TNT-based explosives contain DNT residues. The use of long period gratings (LPGs) formed in grapefruit photonic crystal fiber (PCF) with thin-film overlay coated on the inner surface of air holes for gas sensing is demonstrated. A gas analyteinduced index variation of the thin-film immobilized on the inner surface of the holey region of the fiber can be observed by a shift of the resonance wavelength. We demonstrate a 2,4-dinitrotoluene (DNT) sensor using grapefruit PCF–LPGs. Coating with gas-sensitive thin-film on the inner surface of the air holes of the grapefruit PCF–LPG could provide a promising platform for rapid highly sensitive gas sensing. A rapid and highly sensitive detection of DNT has been demonstrated using the grapefruit PCF–LPG sensor to show the feasibility of the proposed approach.

Paper Details

Date Published: 25 October 2016
PDF: 7 pages
Proc. SPIE 10158, Optical Communication, Optical Fiber Sensors, and Optical Memories for Big Data Storage, 101580D (25 October 2016); doi: 10.1117/12.2245180
Show Author Affiliations
Chuanyi Tao, Chongqing Univ. of Technology (China)
Jingke Li, Chongqing Medical and Pharmaceutical College (China)
Tenglong Zhu, China Univ. of Mining and Technology (China)

Published in SPIE Proceedings Vol. 10158:
Optical Communication, Optical Fiber Sensors, and Optical Memories for Big Data Storage

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