Fast-response concentration measurement of bromotrifluoromethane using a quantum cascade laser (QCL) at 8.280 μm.

In this study. a measurement system for a gaseous fire extinguisher bromotrifluoromethane (Halon 1301) was de eloped using a quantum cascade laser (QCL) at similar to 8.280 mu m. 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. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.