ISSN:
1434-6079
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract. Nitrogen, oxygen, air and self-broadening coefficients have been measured in direct absorption for six transitions in the $\nu_{1} + \nu_{3}$ combination band of ammonia at room temperature using a DFB diode laser operating at 1.51 μm. Absorption cross-sections for these strong lines, suitable for detection purposes, have been determined. Using 2f wavelength modulation spectroscopy we demonstrate a minimum detectable concentration of 500 ppb in a 75 cm path in 1 s at atmospheric pressure and present a simple method for measurement of broadening coefficients.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1140/epjd/e2003-00289-y
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