In-water fiber-optic evanescent wave sensing with quantum cascade lasers

SENSORS AND ACTUATORS B-CHEMICAL

卷:262

Article

Chevalier, Paul¹  Piccardo, Marco¹  de Naurois, Guy-Mael¹  Gabay, Ilan^1,2  Katzir, Abraham²  Capasso, Federico¹ 

[1] Harvard Univ, Harvard John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[2] Tel Aviv Univ, Sackler Fac Exact Sci, Sch Phys & Astron, Tel Aviv, Israel

关键词: Fiber-optic evanescent wave spectroscopy;    Quantum cascade laser;    Silver-halide fiber;    Attenuated total reflectance;   

DOI  :  10.1016/j.snb.2018.01.159

来源: Elsevier

【 摘 要 】

The ability of detecting harmful chemicals is an important safety requirement for drinking water systems. An apparatus for in-water chemical sensing based on the absorption of evanescent waves generated by a quantum cascade laser array propagating in a silver halide optical fiber immersed into water is demonstrated. We present a theoretical analysis of the sensitivity of the system and experimentally characterize its real-time response and spectroscopic detection for injection of a sample chemical (ethanol) in a tube containing water. (C) 2018 Elsevier B.V. All rights reserved.

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