Linewidth and Bandwidth Measurements of the Q-Branch of H2 Using CW Coherent Anti-Stokes Raman Spectroscopy.
Abstract
The Raman linewidths of the H2 Q-branch transitions were determined using coherent anti-Stokes Raman Spectroscopy (CARS). A cw CARS system, employing a tunable dye laser for the Stokes beam and an argon ion laser to provide the pump beam, was used to excite the Q(0) through Q(3) transitions of H2. High resolution linewidth measurements were made at pressures ranging from .75 to 40 atm. A Fabry-Perot interferometer was used to provide a relative frequency marker for linewidth determination. The frequencies of these peaks were determined by comparison with an iodine absorption spectrum effect. All four lines showed pressure broadening and the Dicke narrowing effect. The pressure broadening coefficients for these lines were determined and compared to those obtained by other researchers using different methods. Narrowing of the band as a whole was observed with increasing pressure. The data demonstrated the effectiveness of the cw CARS system developed in this thesis an ultrahigh resolution spectroscopic system useful for studying other molecules. Originator-supplied keywords include: Coherent anti-stokes raman spectroscopy, Raman spectroscopy, Molecular spectroscopy, Hydrogen, Theses.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1984
- Accession Number
- ADA151868
Entities
People
- A. M. Toich
- D. W. Melton
Organizations
- Air Force Institute of Technology