Gibson, G. and Monk, S. D. and Padgett, M. (2002) A field-portable, laser-diode spectrometer for the ultra-sensitive detection of hydrocarbon gases. Journal of Modern Optics, 49 (5-6). pp. 769-776.Full text not available from this repository.
We have developed a field-portable optical gas sensor for the ultra-sensitive detection of ethane. The system is based on an adaptation of a commercially available system, which uses a cryogenically cooled, lead-salt laser diode at 3.34 mum and a multi-pass astigmatic Herriott sample cell. We have adapted this system to a second derivative wavelength modulation scheme giving a lower detection limit of less than 100 parts per trillion for a one second measurement time. Our custom-designed software controls every aspect of the instrument operation from spectral scanning of the laser diode, to automatic calibration, optical alignment, spectral analysis and complete data logging.
|Journal or Publication Title:||Journal of Modern Optics|
|Additional Information:||15th National Quanturn Electronics and Photonics Conference, GLASGOW, SCOTLAND, SEP 03-06, 2001|
|Subjects:||T Technology > TA Engineering (General). Civil engineering (General)|
|Departments:||Faculty of Science and Technology > Lancaster Environment Centre|
Faculty of Science and Technology > Engineering
|Deposited By:||Dr Stephen Monk|
|Deposited On:||09 Dec 2010 10:12|
|Last Modified:||26 Jul 2012 17:41|
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