Tunable diode-laser absorption measurements of methane at elevated temperatures
Abstract
A diode-laser sensor system based on absorption spectroscopy techniques has been developed to monitor CH4 nonintrusively in high-temperature environments. Fundamental spectroscopic parameters, including the line strengths of the transitions in the R(6) manifold of the 2 nu 3 band near 1.646 mu m, have been determined from high-resolution absorption measurements in a heated static cell. In addition, a corrected expression for the CH 4 partition function has been validated experimentally over the temperature range from 400 to 915 K. Potential applications of the diode-laser sensor system include process control, combustion measurements, and atmospheric monitoring.
- Publication:
-
Applied Optics
- Pub Date:
- July 1996
- DOI:
- 10.1364/AO.35.004026
- Bibcode:
- 1996ApOpt..35.4026N
- Keywords:
-
- ABSORPTION;
- GASES;
- INSTRUMENTATION: MEASUREMENT: AND METROLOGY;
- INTEGRATED OPTICS;
- LASERS AND LASER OPTICS;
- LASERS: DIODE;
- LASERS: TITANIUM;
- METHANE;
- SENSORS;
- SPECTROSCOPY;
- SPECTROSCOPY: MOLECULAR;
- TEMPERATURE