Mid-IR spectroscopy using silver halide planar waveguide sensors for the chemical sensing of hazardous substances

B. Dekel; A. Katzir

doi:10.1117/12.864905

Mid-IR spectroscopy using silver halide planar waveguide sensors for the chemical sensing of hazardous substances

B. Dekel, A. Katzir

School of Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

There is a worldwide interest in developing a sensing system for the online detection and chemical identification of hazardous substances, especially in water and in air. Towards this goal we have developed an evanescent wave spectroscopy system based on a tunable CO₂ on an IR detector and on thin AgBr flat waveguides, which were transparent in the mid-IR and served as sensing elements. Aqueous solutions of common pesticides (e.g. DDVP, Parathion, Diazinon) were placed on the waveguide and spectral absorption measurements were performed in the mid-IR. Using the results, we were able to detect these pesticides at concentrations as low as few ppm and distinguish between them. Such a system would be invaluable for homeland security applications.

Original language	English
Title of host publication	Optics and Photonics for Counterterrorism and Crime Fighting VI and Optical Materials in Defence Systems Technology VII
DOIs	https://doi.org/10.1117/12.864905
State	Published - 2010
Event	Optics and Photonics for Counterterrorism and Crime Fighting VI and Optical Materials in Defence Systems Technology VII - Toulouse, France Duration: 20 Sep 2010 → 23 Sep 2010

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	7838
ISSN (Print)	0277-786X

Conference

Conference	Optics and Photonics for Counterterrorism and Crime Fighting VI and Optical Materials in Defence Systems Technology VII
Country/Territory	France
City	Toulouse
Period	20/09/10 → 23/09/10

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10.1117/12.864905

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Dekel, B., & Katzir, A. (2010). Mid-IR spectroscopy using silver halide planar waveguide sensors for the chemical sensing of hazardous substances. In Optics and Photonics for Counterterrorism and Crime Fighting VI and Optical Materials in Defence Systems Technology VII [783806] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7838). https://doi.org/10.1117/12.864905

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abstract = "There is a worldwide interest in developing a sensing system for the online detection and chemical identification of hazardous substances, especially in water and in air. Towards this goal we have developed an evanescent wave spectroscopy system based on a tunable CO2 on an IR detector and on thin AgBr flat waveguides, which were transparent in the mid-IR and served as sensing elements. Aqueous solutions of common pesticides (e.g. DDVP, Parathion, Diazinon) were placed on the waveguide and spectral absorption measurements were performed in the mid-IR. Using the results, we were able to detect these pesticides at concentrations as low as few ppm and distinguish between them. Such a system would be invaluable for homeland security applications.",

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Dekel, B & Katzir, A 2010, Mid-IR spectroscopy using silver halide planar waveguide sensors for the chemical sensing of hazardous substances. in Optics and Photonics for Counterterrorism and Crime Fighting VI and Optical Materials in Defence Systems Technology VII., 783806, Proceedings of SPIE - The International Society for Optical Engineering, vol. 7838, Optics and Photonics for Counterterrorism and Crime Fighting VI and Optical Materials in Defence Systems Technology VII, Toulouse, France, 20/09/10. https://doi.org/10.1117/12.864905

Mid-IR spectroscopy using silver halide planar waveguide sensors for the chemical sensing of hazardous substances. / Dekel, B.; Katzir, A.

Optics and Photonics for Counterterrorism and Crime Fighting VI and Optical Materials in Defence Systems Technology VII. 2010. 783806 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7838).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AB - There is a worldwide interest in developing a sensing system for the online detection and chemical identification of hazardous substances, especially in water and in air. Towards this goal we have developed an evanescent wave spectroscopy system based on a tunable CO2 on an IR detector and on thin AgBr flat waveguides, which were transparent in the mid-IR and served as sensing elements. Aqueous solutions of common pesticides (e.g. DDVP, Parathion, Diazinon) were placed on the waveguide and spectral absorption measurements were performed in the mid-IR. Using the results, we were able to detect these pesticides at concentrations as low as few ppm and distinguish between them. Such a system would be invaluable for homeland security applications.

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Dekel B, Katzir A. Mid-IR spectroscopy using silver halide planar waveguide sensors for the chemical sensing of hazardous substances. In Optics and Photonics for Counterterrorism and Crime Fighting VI and Optical Materials in Defence Systems Technology VII. 2010. 783806. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.864905

Mid-IR spectroscopy using silver halide planar waveguide sensors for the chemical sensing of hazardous substances

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