Design Considerations to Realize Differential Absorption-Based Optofluidic Sensors for Determination of Ionic Content in Water

Authors :: Gerrit Willem Steen
Herman L. Offerhaus
Elmar C. Fuchs
Adam D. Wexler
Optical Sciences
Source :: IEEE sensors journal, 18(15), 6051-6058. IEEE
Publication Year :: 2018
Publisher :: Institute of Electrical and Electronics Engineers (IEEE), 2018.
Abstract: Integrated optofluidic absorption spectroscopy has the potential to be used in the real-time identification and quantification of ionic content in drinking water. Such an approach requires single mode operation in combination with low propagation and bend losses. The design criteria for the realization of an integrated Near-infrared (NIR) sensor platform fabricated using silicon waveguide based technology is presented. The cross-section of TriPleX waveguides was optimized for a spectral region between 940 and 1040nm. The waveguide structure provides single mode operation, high sensitivity combined with reasonable tolerance for fabrication deviations and

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