Paper
18 March 1994 Infrared tunable diode laser diagnostics for aircraft exhaust emissions characterization
Joda C. Wormhoudt, Mark S. Zahniser, David D. Nelson Jr., J. Barry McManus, R. C. Miake-Lye, Charles E. Kolb
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Abstract
The atmospheric effects of stratospheric aircraft component of the NASA High Speed Research Program will require measurements of trace gas concentrations in the exhausts of high speed civil transport engines. In parallel with the development of these engines by NASA and its industrial partners, a portable infrared tunable diode laser apparatus has been assembled and tested which is capable of both in situ and extractive sampling of combustion gas flows. Infrared diode laser absorption is sensitive, quantitative, and applicable to a wide range of molecular species. In the present apparatus, sensitive detection is achieved by rapid frequency scanning and real-time nonlinear least squares fitting and background subtraction. Sensitivity is further increased for extractive sampling by an advanced design multiple pass cell which gives longer path lengths in smaller volumes. Observations of a laboratory flat flame burner are reported. These observations and spectroscopic models are used to predict detection sensitivities in exhausts and other combustion systems.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Joda C. Wormhoudt, Mark S. Zahniser, David D. Nelson Jr., J. Barry McManus, R. C. Miake-Lye, and Charles E. Kolb "Infrared tunable diode laser diagnostics for aircraft exhaust emissions characterization", Proc. SPIE 2122, Laser Applications in Combustion and Combustion Diagnostics II, (18 March 1994); https://doi.org/10.1117/12.171299
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Cited by 7 scholarly publications.
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KEYWORDS
Absorption

Infrared radiation

Semiconductor lasers

Mirrors

Tunable diode lasers

Infrared lasers

Sensors

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