Measurement of ethylene in combustion exhaust using a 3.3-mu m distributed feedback interband cascade laser with wavelength modulation spectroscopy

作者：Tanaka Kotaro^*; Akishima Kazushi; Sekita Masahiro; Tonokura Kenichi; Konno Mitsuru

来源：Applied Physics B: Lasers and Optics , 2017, 123(8): 219.

DOI：10.1007/s00340-017-6798-4

A sensor for the detection of ethylene (C2H4) in combustion exhaust based on a mid-infrared wavelength modulation spectroscopic technique was constructed using a distributed feedback interband cascade laser (DFB-ICL) with a wavelength of 3.3 mu m. The direct absorption spectrum of C2H4 in the range of 2978.8-2982.1 cm(-1) was recorded, where the spectrum was in good agreement with the spectrum simulated using parameters from the HITRAN 2012 database. The absorption line at 2979.581 cm(-1) [2.42 x 10(-21) cm(2) mol(-1) cm(-1), nu(11), P-P(5)(5)] was selected for C2H4 detection. This frequency was chosen to minimize spectral interference from other major combustion products in the emission frequency range of the DFB-ICL. A limit of detection for C2H4 of 96 parts per billion by volume was achieved at a signal-to-noise ratio of two under 3 kPa of pressure using 2f wavelength modulation spectroscopy. Using the developed sensor, the ethylene concentration in the exhaust from a portable power generator was also successfully determined.

• 出版日期2017-8