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Sensors 2015, 15(9), 22724-22736; doi:10.3390/s150922724

New Opportunities in Mid-Infrared Emission Control

Norsk Elektro Optikk A/S, Prost Stabels vei 22, 2019 Skedsmokorset, Norway
Academic Editor: Mark A. Arnold
Received: 7 July 2015 / Revised: 20 August 2015 / Accepted: 26 August 2015 / Published: 9 September 2015
(This article belongs to the Special Issue Chemical Sensors based on In Situ Spectroscopy)
View Full-Text   |   Download PDF [6392 KB, uploaded 15 September 2015]   |  

Abstract

Tunable laser absorption spectroscopy (TLAS) has been well accepted as a preferred measurement technique for many industrial applications in recent years, especially for in situ applications. Previously, mainly near-infrared lasers have been used in TLAS sensors. The advent of compact mid-infrared light sources, like quantum cascade lasers and interband cascade lasers, has made it possible to detect gases with better sensitivity by utilizing fundamental absorption bands and to measure species that do not have any absorption lines in the near-infrared spectral region. This technological advancement has allowed developing new sensors for gases, such as nitric oxide and sulfur dioxide, for industrial applications. Detection limits of better than 1 ppm·m for nitric oxide and better than 10 ppm·m for sulfur dioxide are demonstrated in field experiments. View Full-Text
Keywords: mid-infrared; nitric oxide; sulfur dioxide; quantum cascade laser; interband cascade laser; in situ; gas sensing mid-infrared; nitric oxide; sulfur dioxide; quantum cascade laser; interband cascade laser; in situ; gas sensing
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Geiser, P. New Opportunities in Mid-Infrared Emission Control. Sensors 2015, 15, 22724-22736.

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