TY - JOUR

T1 - A field-portable, laser-diode spectrometer for the ultra-sensitive detection of hydrocarbon gases

AU - Gibson, G.

AU - Monk, S. D.

AU - Padgett, M.

N1 - 15th National Quanturn Electronics and Photonics Conference, GLASGOW, SCOTLAND, SEP 03-06, 2001

PY - 2002/4

Y1 - 2002/4

N2 - 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.

AB - 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.

U2 - 10.1080/09500340110108639

DO - 10.1080/09500340110108639

M3 - Journal article

VL - 49

SP - 769

EP - 776

JO - Journal of Modern Optics

JF - Journal of Modern Optics

SN - 1362-3044

IS - 5-6

ER -