STIMULATED EFFECTS IN N2 AND CH4 GASES.
Abstract
Stimulated Brillouin scattering from N2 and CH4 using a giant pulse laser was observed in an arrangement where-by the laser cannot re-lase and amplify the backscattered radiation. This allows a quantitative study of the parameters affecting stimulated Brillouin scattering. The back-scattered beam converges at the same angle at which the laser beam diverges. The Brillouin component can have a narrow spectral width, 1/3 that of the laser itself, and in some cases can have a duration of only a few nanoseconds. N2 at high pressure can back-scatter as much as 45% of the incident power. The speeds of sound in CH4 and N2 were measured at lower pressures than were previously reported. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1966
- Accession Number
- AD0638674
Entities
People
- D. H. Rank
- R. V. Wick
- T. A. Wiggins
Organizations
- Pennsylvania State University