Near-infrared diode laser based spectroscopic detection of ammonia: a comparative study of photoacoustic and direct optical absorption methods |
| |
| Authors: | Bozoki Zoltan Mohacsi Arpad Szabo Gabor Bor Zsolt Erdelyi Miklos Chen Weidong Tittel Frank K |
| |
| Affiliation: | Research Group on Laser Physics of the Hungarian Academy of Sciences, Szeged, Hungary. |
| |
| Abstract: | A photoacoustic spectroscopic (PAS) and a direct optical absorption spectroscopic (OAS) gas sensor, both using continuous-wave room-temperature diode lasers operating at 1531.8 nm, were compared on the basis of ammonia detection. Excellent linear correlation between the detector signals of the two systems was found. Although the physical properties and the mode of operation of both sensors were significantly different, their performances were found to be remarkably similar, with a sub-ppm level minimum detectable concentration of ammonia and a fast response time in the range of a few minutes. |
| |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ |
|
