
Proceedings Paper
Use of external cavity quantum cascade laser compliance voltage in real-time trace gas sensing of multiple chemicalsFormat | Member Price | Non-Member Price |
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Paper Abstract
We describe a prototype trace gas sensor designed for real-time detection of multiple chemicals. The sensor uses an
external cavity quantum cascade laser (ECQCL) swept over its tuning range of 940-1075 cm-1 (9.30-10.7 μm) at a 10 Hz
repetition rate. The sensor was designed for operation in multiple modes, including gas sensing within a multi-pass
Heriott cell and intracavity absorption sensing using the ECQCL compliance voltage. In addition, the ECQCL
compliance voltage was used to reduce effects of long-term drifts in the ECQCL output power. The sensor was
characterized for noise, drift, and detection of chemicals including ammonia, methanol, ethanol, isopropanol, Freon-
134a, Freon-152a, and diisopropyl methylphosphonate (DIMP). We also present use of the sensor for mobile detection
of ammonia downwind of cattle facilities, in which concentrations were recorded at 1-s intervals.
Paper Details
Date Published: 8 February 2015
PDF: 14 pages
Proc. SPIE 9370, Quantum Sensing and Nanophotonic Devices XII, 93700Z (8 February 2015); doi: 10.1117/12.2080852
Published in SPIE Proceedings Vol. 9370:
Quantum Sensing and Nanophotonic Devices XII
Manijeh Razeghi; Eric Tournié; Gail J. Brown, Editor(s)
PDF: 14 pages
Proc. SPIE 9370, Quantum Sensing and Nanophotonic Devices XII, 93700Z (8 February 2015); doi: 10.1117/12.2080852
Show Author Affiliations
Mark C. Phillips, Pacific Northwest National Lab. (United States)
Matthew S. Taubman, Pacific Northwest National Lab. (United States)
Matthew S. Taubman, Pacific Northwest National Lab. (United States)
Jason Kriesel, Opto-Knowledge Systems, Inc. (United States)
Published in SPIE Proceedings Vol. 9370:
Quantum Sensing and Nanophotonic Devices XII
Manijeh Razeghi; Eric Tournié; Gail J. Brown, Editor(s)
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