Enabling low-cost, high-performance vapor-phase TNT detection by optimizing multimode fiber sensing platform

Jianjun Ma; Aldona Kos; Wojtek J. Bock; Xianzhe Li; Huy Nguyen; Zhi Yuan Wang

doi:10.1117/12.885639

17 May 2011 Enabling low-cost, high-performance vapor-phase TNT detection by optimizing multimode fiber sensing platform

Jianjun Ma, Aldona Kos, Wojtek J. Bock, Xianzhe Li, Huy Nguyen, Zhi Yuan Wang

Author Affiliations +

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77535M (2011) https://doi.org/10.1117/12.885639
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

Identification of trace-vapor TNT explosive emanating from mines or IEDs is in urgent demand due to today's mounting terrorist threat. Amplifying fluorescent polymer (AFP) based on quenching offers an opportunity for progress in this regard. Maximizing the performance of this material and meeting the requirements of real-life situations, however, pose challenges to the sensing platform design. We address these challenges by establishing a multimode fiber-optic sensing platform with a millimeter-scale sensing element and our alternative TNT sensory polymer to AFP. Theoretical calculation is given, demonstrating the highly efficient use of the excitation power, which allows for the sensing head to be as miniature as 0.8×0.8×1.6 mm. The exposure of our sensor to the TNT vapor gives a fast response, at the level of 30% power quenching occurring within 10 seconds. Another major advantage of our solution is that the mechanism of stray excitation light is eliminated naturally due to the design of the platform architecture.

Citation Download Citation

Jianjun Ma, Aldona Kos, Wojtek J. Bock, Xianzhe Li, Huy Nguyen, and Zhi Yuan Wang "Enabling low-cost, high-performance vapor-phase TNT detection by optimizing multimode fiber sensing platform", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77535M (17 May 2011); https://doi.org/10.1117/12.885639

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