Water vapor continuum absorption in the 3.5-4.0-µm region
Abstract
Measurements of water vapor continuum absorption in the 3.5-4.0-micrometer region are presented. The measurements were made with both long-path absorption cell and spectrophone systems. A deuterium fluoride grating tunable laser was the IR source. Measurements were made at 23 C and 65 C with 14.3 torr and 65 torr of water vapor, respectively, buffered to 760-torr total pressure by an 80/20 mixture of N2/O2. Both natural water and a special sample of deuterium depleted water (one-fiftieth the normal concentration) were used. The 65 C results agree with previous measurements by other workers. The 23 C results indicate a continuum absorption at this temperature about a factor of 2 larger than expected based on the extrapolation scheme and high-temperature data of others.
- Publication:
-
Applied Optics
- Pub Date:
- September 1978
- DOI:
- 10.1364/AO.17.002711
- Bibcode:
- 1978ApOpt..17.2711W
- Keywords:
-
- Atmospheric Windows;
- Electro-Optics;
- Infrared Absorption;
- Infrared Windows;
- Water Vapor;
- Absorption Spectra;
- Atmospheric Attenuation;
- Continuums;
- Infrared Spectra;
- Line Spectra;
- Optics;
- WATER;
- ABSORPTION;
- LASERS: DEUTERIUM FLUORIDE;
- ATMOSPHERIC OPTICS;
- SPECTROSCOPY: INFRARED