Evanescent wave sensors for mid-IR spectroscopy

S. V. Korsakova; E. A. Romanova

doi:10.1117/12.2230148

21 April 2016 Evanescent wave sensors for mid-IR spectroscopy

S. V. Korsakova, E. A. Romanova

Proceedings Volume 9917, Saratov Fall Meeting 2015: Third International Symposium on Optics and Biophotonics and Seventh Finnish-Russian Photonics and Laser Symposium (PALS); 99173G (2016) https://doi.org/10.1117/12.2230148
Event: Saratov Fall Meeting 2015, 2015, Saratov, Russian Federation

Abstract

An important problem of investigation of the air and water contamination by the mid-IR spectroscopy is discussed. A model of evanescent wave sensor made of a multimode waveguide transparent in the mid-IR spectral range is developed. Transmittance and sensitivity of a sensing element consisting of an input chalcogenide waveguide and a sensing waveguide depend on distribution of the guided modes amplitudes in the sensing waveguide. We have demonstrated that excitation of higher-order modes is important for optimal performance of such a sensor.

Citation Download Citation

S. V. Korsakova and E. A. Romanova "Evanescent wave sensors for mid-IR spectroscopy", Proc. SPIE 9917, Saratov Fall Meeting 2015: Third International Symposium on Optics and Biophotonics and Seventh Finnish-Russian Photonics and Laser Symposium (PALS), 99173G (21 April 2016); https://doi.org/10.1117/12.2230148

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