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(a) Schematic of the experimental setup showing the respective components, FT-IR (Fourier transform infrared) spectrometer, coupling optics, thermoelectrically-cooled MCT detector, and µ-flow cell. The latter included the waveguide element (i.e., AgX fiber). (b) Entire miniaturized MIR sensor system (size: 650 × 210 mm2) comprising of the optical components, a small computer for data generation and analysis, and a peristaltic pump.
