3 June 1994 Industrialized high-sensitivity fiber optic near-IR diode-laser-based gas analysis system
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Proceedings Volume 2112, Tunable Diode Laser Spectroscopy, Lidar, and DIAL Techniques for Environmental and Industrial Measurements; (1994); doi: 10.1117/12.177291
Event: SPIE's International Symposium on Optical Sensing for Environmental Monitoring, 1993, Atlanta, GA, United States
Abstract
An industrialized computer-controlled fiber optic laser diode gas analysis system is described. A unique signal processing scheme completely eliminates both non-gas-related transmission variation and long-term drift. Sensitivities better than 1 ppm(DOT)m and 200 ppm(DOT)m is routinely achieved for field-installed systems for ammonia and oxygen, respectively. due to the superior selectivity of laser diodes, interference effects from coexisting gases, such as water vapor in ammonia measurements, are easily avoided.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Henrik Ahlberg, Stefan Helge Lundqvist, Robert Tell, Torbjoern Andersson, "Industrialized high-sensitivity fiber optic near-IR diode-laser-based gas analysis system", Proc. SPIE 2112, Tunable Diode Laser Spectroscopy, Lidar, and DIAL Techniques for Environmental and Industrial Measurements, (3 June 1994); doi: 10.1117/12.177291; https://doi.org/10.1117/12.177291
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KEYWORDS
Oxygen

Semiconductor lasers

Fiber optics

Computing systems

Absorption

Calibration

Gases

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