Ammonia Detection by use of Near-Infrared Diode-Laser-Based Overtone Spectroscopy
Applied Optics, Vol. 40, Issue 24, pp. 4387-4394 (2001)
http://dx.doi.org/10.1364/AO.40.004387
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Abstract
We describe a portable diode-laser-based sensor for NH3 detection using vibrational overtone absorption spectroscopy at 1.53 μm. Use of fiber-coupled optical elements makes such a trace gas sensor rugged and easy to align. On-line data acquisition and processing requiring <30 s can be performed with a laptop PC running LabVIEW software. The gas sensor was used primarily for NH3 concentration measurements with a sensitivity of 0.7 parts per million (signal-to-noise ratio of 3) over a two-week period in a bioreactor being developed at the NASA Johnson Space Center for water treatment technologies to support long-duration space missions. The feasibility of simultaneous, real-time measurements of NH3 and CO2 concentrations is also reported.
© 2001 Optical Society of America
[Optical Society of America ]
OCIS Codes
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(280.3420) Remote sensing and sensors : Laser sensors
(300.6360) Spectroscopy : Spectroscopy, laser
Citation
Ricardo Claps, Florian V. Englich, Darrin P. Leleux, Dirk Richter, Frank K. Tittel, and Robert F. Curl, "Ammonia Detection by use of Near-Infrared Diode-Laser-Based Overtone Spectroscopy," Appl. Opt. 40, 4387-4394 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-24-4387
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