2.1 - High-Speed MWIR Upconversion Spectroscopy
- AMA Conferences 2017
2017-05-30 - 2017-06-01
- Proceedings IRS² 2017
- I2 - Spectroscopy and Gas Analysis
- S. Wolf, J. Kießling, T. Trendle, F. Kühnemann - Fraunhofer Institute for Physical Measurement Techniques IPM, Freiburg (Germany), M. Kunz, G. Popko - Fraunhofer Institute for High-Speed Dynamics EMI, Efringen-Kirchen (Germany)
- 766 - 768
Infrared spectroscopy is a key technology for process analytical applications. Although stronger spectroscopic features are found in the mid-infrared at wavelengths beyond 3 μm, the near-infrared range is often favored due to better detector performance. In this work, continuous-wave nonlinearoptical upconversion is used to transfer signals from the mid-wave infrared to the near-infrared range where high-speed and high-sensitivity detectors are readily available. A grating spectrometer device for the mid-wave range, based on nonlinear-optical upconversion is presented as a promising tool for high-speed mid-infrared spectroscopy. The system is characterized for resolution and sensitivity. The high spectra acquisition rate allows combustion analysis in the wavelength range from 3.7 to 4.7 μm with outstanding time resolution.