P4.5 IR photo-acoustic sensors of various chemicals: review of practical realization
- 16. GMA/ITG-Fachtagung Sensoren und Messsysteme 2012
2012-05-22 - 2012-05-23
- P4 Optische Sensoren und Messsysteme
- F. Mayorov - HLS Hypertech Laser Systems GmbH, Lübeck, A. Karapuzikov, M. Starikova, D. Kashtanov, D. Kolker - Special technologies Ltd., Novosibirsk (Russland), A. Karapuzikov, I. Sherstov - Russian Academy of Sciences, Novosibirsk (Russland)
- 759 - 769
In recent years the method of laser photoacoustic spectroscopy (LPAS) has become an important method for monitoring of gas chemical agent in atmosphere because of its simplicity experimental realization, safety, high sensitivity (ppb- ppt level). LPAS makes to take measurements in real time with a minima 1 volume of gas sample or in continuous pumping mode of the analyzing gas sample. The LPAS detectors do not require using of expensive high-reflectivity mirrors as opposed to CRDS method. Capacities of LPAS sensors generally increase with increasing laser energy as far as acoustic signal are proportional to optical power absorbed in detector. This explains the increasing number of LPAS works with the advent of tunable quantum cascade mid-IR laser with a high average power.
In this presentation we will show few gas analyzers based on LPAS, which are designed in Special Technologies Ltd., with the participation of Institute of Laser Physics and V.E. Zuev Institute of Atmospheric Optics Russian Academy of Sciences, Siberian Branch. Each device was developed for different technological and scientific tasks.