A Preliminary Investigation of Nonlinear Optoacoustic Sound Generation Processes.
Abstract
In the generic optoacoustic sound source, a laser beam is directed at the water surface to produce a controlled local reaction which, in turn generates sound waves. The energy is delivered without physical contact. At low optical intensities, the reaction is a linear thermal expansion of the medium, but at high intensities, the reaction is nonlinear and more complicated. A simple blast model is used to predict the acoustic output of the high intensity reaction. The blast model is based on that of A. N. Pirri who sucessfully used to model the momentum transfer between a high power laser blast on the surface of a solid. The model is general enough to be adapted for laser induced blasts over water. The model predictions are compared with experimental results. The differences are discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 12, 1986
- Accession Number
- ADA176318
Entities
People
- Nicholas P. Chotiros
Organizations
- University of Texas at Austin