New Opportunities in Mid-Infrared Emission Control

Sensors

Peter Geiser¹ 

[1] Norsk Elektro Optikk A/S, Prost Stabels vei 22, 2019 Skedsmokorset, Norway; E-Mail

关键词: mid-infrared;    nitric oxide;    sulfur dioxide;    quantum cascade laser;    interband cascade laser;    in situ;    gas sensing;   

DOI  :  10.3390/s150922724

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the author; licensee MDPI, Basel, Switzerland.