Measurements of Water-Vapor Transitions in the Vicinity of 5.35 Microns with a Tunable Spin-Flip Raman Laser.
Abstract
Tunable infrared laser spectroscopy of atmospheric water vapor has been carried out at 5.35 micrometers using a Raman spin-flip laser as a tunable source. A Raman spin-flip laser was operated in the mode controlled region to produce the narrowest possible line width. Several of the pressure broadened line widths of the 6.3 micrometers nu sub 2 fundamental band of water vapor were measured. The measured line widths were found to be slightly narrower than the theoretically calculated widths of Benedict and Calfee. These results support the findings of others and indicate absorption coefficients at the line centers that are larger than those indicated by the calculated parameters. These discrepancies have important implications concerning the transmittance of the atmosphere at or near the water vapor lines measured.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1975
- Accession Number
- ADA019327
Entities
People
- William A. Wallace
Organizations
- Air Force Institute of Technology