AI Article Synopsis
- Mid-infrared spectroscopy is crucial for various scientific and industrial applications, but grating spectrometers in this range are infrequently used due to the lack of effective line array detectors.
- Continuous-wave nonlinear-optical upconversion allows for mid-infrared spectroscopy by converting a spectral range of 3.7 to 4.7 μm into 825 - 867 nm, which can be detected using high-sensitivity silicon cameras.
- The study provides a theoretical model for the upconversion process and showcases its effectiveness through spectroscopic measurements of flame emissions in dynamic processes.
Article Abstract
Mid-infrared spectroscopy is an essential analytical method in science and industry. Unlike in the near-infrared range, grating spectrometers for the mid-infrared are rarely employed, mostly due to the limited availability and performance of suitable line array detectors. In this work, continuous-wave nonlinear-optical upconversion is used to enable mid-infrared spectroscopy. A broad spectral window between 3.7 and 4.7 μm is upconverted to 825 - 867 nm for detection on a silicon-camera-based near-infrared grating spectrometer with a high sensitivity down to sub-picowatt of input power. A theoretical model is presented that accurately describes the upconversion process and the total system behavior. Spectroscopic flame emission measurements demonstrate the applicability towards the analysis of highly dynamic processes.
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| http://dx.doi.org/10.1364/OE.25.014504 | DOI Listing |
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