21 April 2016 Evanescent wave sensors for mid-IR spectroscopy
Author Affiliations +
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.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. V. Korsakova, S. V. Korsakova, E. A. Romanova, 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); doi: 10.1117/12.2230148; https://doi.org/10.1117/12.2230148

Back to Top