Remote detection of SO2 and CO2 with a heterodyne radiometer
- 1 June 1973
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 22 (11), 592-593
- https://doi.org/10.1063/1.1654519
Abstract
A heterodyne radiometer, operating in the 9‐ to 11‐μm wavelength region, has been used to detect SO2 and CO2 in the laboratory with sensitivity adequate for remote stack monitoring and other sensing applications. CO2 lasers were used as local oscillators. The mixer was copper‐doped germanium, compensated with antimony donors, and the i.f. bandwidth was 500 MHz. Wavelengths of operation were chosen to minimize interference from water vapor.Keywords
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