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Updated: Aug 27, 2025

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
Published on: March 22, 2019
Fang Ou1,2, Anne van Klinken1, Petar Ševo1,2
1Department of Applied Physics and Eindhoven Hendrik Casimir Institute, Eindhoven University of Technology, P.O. Box 513NL, 5600 MB Eindhoven, The Netherlands.
A new handheld near-infrared (NIR) spectral sensor module offers a compact, low-cost alternative to traditional spectrometers. This robust device demonstrates comparable performance in quantifying moisture in rice and classifying plastics.
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