Monitoring of ethylene by a pulsed quantum cascade laser

Abstract

We report on the development and performance of a gas sensor based on a quantum cascade laser operating at a wavelength of ∼10 μm to measure ethylene (C₂H₄) concentrations by use of a rotational component of the fundamental ν ₇ band. The laser is thermoelectrically cooled and operates in a pulsed mode. The influence of pulse-to-pulse fluctuations is minimized by use of a reference beam and a single detector with time discriminating electronics. Gas absorption is recorded in a 100-m optical path-length astigmatic Herriott cell. With a 10-kHz pulse repetition rate and an 80-s total acquisition time, a noise equivalent sensitivity of 30 parts per billion has been demonstrated. The sensor has been applied to monitor C₂H₄ in vehicle exhaust as well as in air collected in a high-traffic urban tunnel.

© 2004 Optical Society of America

Quartz-enhanced photoacoustic detection of ethylene using a 10.5 μm quantum cascade laser

Zhen Wang, Zhili Li, and Wei Ren
Opt. Express 24(4) 4143-4154 (2016)

Ultra-sensitive ethylene post-harvest monitor based on cavity ring-down spectroscopy

Edward H. Wahl, Sze M. Tan, Sergei Koulikov, Boris Kharlamov, Christopher R. Rella, Eric R. Crosson, Dave Biswell, and Barbara A. Paldus
Opt. Express 14(4) 1673-1684 (2006)

Real-time trace-level detection of carbon dioxide and ethylene in car exhaust gases

Michael T. McCulloch, Nigel Langford, and Geoffrey Duxbury
Appl. Opt. 44(14) 2887-2894 (2005)

Measurements of NO and CO in Shanghai urban atmosphere by using quantum cascade lasers

Tang Yuanyuan, Liu Wenqing, Kan Ruifeng, Liu Jianguo, He Yabai, Zhang Yujun, Xu Zhenyu, Ruan Jun, and Geng Hui
Opt. Express 19(21) 20224-20232 (2011)

Variable pressure infrared diode laser spectroscopy: a new method for trace-gas monitoring

Sébastien Dusanter, Bernard Lemoine, Benjamin Hanoune, and Pascal Devolder
Appl. Opt. 41(24) 5142-5147 (2002)