@inproceedings{7e93e8866dbf45c1ab5c7f9c01a0fa0a,
title = "Use of external cavity quantum cascade laser compliance voltage in real-time trace gas sensing of multiple chemicals",
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.",
keywords = "Infrared spectroscopy, gas sensing, quantum cascade laser, tunable laser",
author = "Phillips, \{Mark C.\} and Taubman, \{Matthew S.\} and Jason Kriesel",
note = "Publisher Copyright: {\textcopyright} 2015 SPIE.; Quantum Sensing and Nanophotonic Devices XII ; Conference date: 08-02-2015 Through 12-02-2015",
year = "2015",
doi = "10.1117/12.2080852",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Manijeh Razeghi and Eric Tournie and Brown, \{Gail J.\}",
booktitle = "Quantum Sensing and Nanophotonic Devices XII",
}