Nonlinear Spectroscopy of Multicomponent Droplets and Two- and Three-Dimensional Measurements in Flames
Abstract
Our progress in the area of nonlinear spectroscopy of droplets includes the following: (1) demonstration that shape distortion of totally transparent liquid droplets can result via the electrostrictive force associated with the gradient of the laser intensity, which is greatest at the internal focal spot just within the droplet shadow face; (2) investigation of the quenching of the stimulated Raman scattering from droplets after the high intensity laser has reached the laser-induced breakdown threshold and produced a dense, high temperature plasma which can absorb the stimulated Raman radiation; (3) studies on the dependence of the intensity threshold to generate stimulated Raman scattering on the linewidth of the laser, which can be operated in a single mode or a multimode; and (4) development of a fluorescence imaging technique which is capable of demarcating the liquid phase of the deformed droplet after radiation by a carbon dioxide laser has caused the droplet to undergo vaporization. Stimulated raman scattering, Stimulated brillouin scattering, Laser induced breakdown.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 27, 1989
- Accession Number
- ADA205449
Entities
People
- Marshall B. Long
- Richard K. Chang
Organizations
- Yale University