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)

Pulsed quantum-cascade laser-based sensor for trace-gas detection of carbonyl sulfide

Gerard Wysocki, Matt McCurdy, Stephen So, Damien Weidmann, Chad Roller, Robert F. Curl, and Frank K. Tittel
Appl. Opt. 43(32) 6040-6046 (2004)

Thermoelectrically cooled quantum-cascade-laser-based sensor for the continuous monitoring of ambient atmospheric carbon monoxide

Anatoliy A. Kosterev, Frank K. Tittel, Rüdeger Köhler, Claire Gmachl, Federico Capasso, Deborah L. Sivco, Alfred Y. Cho, Shawn Wehe, and Mark G. Allen
Appl. Opt. 41(6) 1169-1173 (2002)

Simultaneous atmospheric nitrous oxide, methane and water vapor detection with a single continuous wave quantum cascade laser

Yingchun Cao, Nancy P. Sanchez, Wenzhe Jiang, Robert J. Griffin, Feng Xie, Lawrence C. Hughes, Chung-en Zah, and Frank K. Tittel
Opt. Express 23(3) 2121-2132 (2015)

Off-axis cavity enhanced spectroscopy based on a pulsed quantum cascade laser for sensitive detection of ammonia and ethylene

Jagadeeshwari Manne, Alan Lim, Wolfgang Jäger, and John Tulip
Appl. Opt. 49(28) 5302-5308 (2010)