Accession Number : ADA019327

Title :   Measurements of Water-Vapor Transitions in the Vicinity of 5.35 Microns with a Tunable Spin-Flip Raman Laser.

Descriptive Note : Doctoral thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Wallace,William A.

Report Date : DEC 1975

Pagination or Media Count : 138

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.

Descriptors :   *Tunable lasers, *Raman spectroscopy, *Water vapor, Atmospheric chemistry, Light transmission, Infrared lasers, Indium antimonides, Absorption(Physical), Optical pumping, Carbon dioxide lasers, Tuning devices, Semiconductor devices, Magnetic fields, Alignment, Gas lasers, Coherent radiation, Theses

Subject Categories : Atmospheric Physics
      Atomic and Molecular Physics and Spectroscopy
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE