Open AccessFast-response concentration measurement of bromotrifluoromethane using a quantum cascade laser (QCL) at 8280 μm
Author(s) -
Wei Yuan,
Dan Zhang,
Song Lu,
He Ping Zhang,
Yu Guan
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.008838
Subject(s) - quantum cascade laser , airworthiness , optics , materials science , laser , cascade , environmental science , optical path , sensitivity (control systems) , physics , certification , chemistry , electronic engineering , chromatography , political science , law , engineering
In this study, a measurement system for a gaseous fire extinguisher bromotrifluoromethane (Halon 1301) was developed, using a quantum cascade laser (QCL) at ~8.280 μm. The performance parameters of this system were also analyzed. Much higher sensitivity and faster response time were achieved compared to non-dispersive infrared (NDIR) sensors and differential-pressure method. A response time of 90 ms from 0% to the targeted concentration 6% was obtained. The detection limit of 500 ppm was obtained with a short optical path length of 2.8 mm. In conclusion, the proposed system can be applied in the airworthiness certification test of an aircraft fire suppression system.