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Mid-IR Spectroscopy with an EC-QCL

In collaboration with scientists at the Pacific Northwest National Laboratory (PNNL), OptoKnowledge is working to develop highly sensitive trace gas sensors. These sensors utilize an external cavity quantum cascade laser (EC-QCL), which enables relatively broad wavelength tuning (e.g., Δλ ≈ 1 µm) over the mid-infrared (Mid-IR) molecular fingerprint region. Sensors utilizing multi-pass cells can detect ppm to ppb levels of a range of species, including relatively “large” molecules, such as pollutants, hydrocarbons, and other volatile organic compounds (VOCs).

Mobile gas sensor built jointly by PNNL/OKSI
Mobile gas sensor built jointly by PNNL/OKSI, which is capable of simultaneous real-time concentration measurements of multiple species.


                


Relevant Publications:

J. Kriesel, C. Makarem, R. Himes, D. Dunn-Rankin, A. Biasioli, A. Chien, L. Muzio, “Mid IR Laser Sensor for Continuous SO3 Monitoring to Improve Coal-Fired Power Plant Performance during Flexible Operations”, 2019 Proceedings DOE/NETL Project Review Meeting for Crosscutting Research (2019).

M. C. Phillips, M. S. Taubman, J. M. Kriesel, "Use of external cavity quantum cascade laser compliance voltage in real-time trace gas sensing of multiple chemicals", Proceedings of SPIE Vol. 9370, 93700Z (2015).

M. C. Phillips, M. S. Taubman, B. E. Bernacki et al., “Design and performance of a sensor system for detection of multiple chemicals using an external cavity quantum cascade laser,” Proc. SPIE, 7608, 76080D (2010).


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