Affiliation:
1. Department of Mechanical Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794-2300
2. Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720
Abstract
The interaction of high-intensity, short-pulse laser radiation with liquids is fundamental to many contemporary technologies. At low laser intensities, the classical model of absorption and heating applies, which assumes a constant absorption coefficient and no dependence on intensity. As the intensity increases, however, many molecules are promoted to excited states, whose absorption properties differ from those of the ground state, and the absorption of the bulk liquid is altered. This phenomenon, called saturable absorption, results in intensity-dependent absorption, heating, and temperature distributions that can deviate significantly from classical absorption. This work investigates the thermal aspects of saturable absorption during laser heating of liquids. A microscopically based model of the radiation absorption and heating processes is presented. Model solutions are discussed and compared with experiment for a contemporary saturable absorbing liquid. Simple engineering criteria and relevant applications are then discussed.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference18 articles.
1. Allen
S. D.
, PorteusJ. O., FaithW. N., and FranckJ. B., 1984, “Contaminant and Defect Analysis of Optical Surfaces by Infrared Laser Induced Desorption,” Applied Physics Letters, Vol. 45, pp. 997–999.
2. Band
Y. B.
, and ScharfB., 1986, “Engineering Reverse Saturable Absorbers for Desired Wavelengths,” Chemical Physics Letters, Vol. 127, pp. 381–386.
3. Brackmann, U., 1994, Lambdachrome Laser Dyes, 2nd ed., Lambda Physik, Go¨ttingen, Germany, pp. 250–251.
4. Brewster, M. Q., 1992, Thermal Radiative Transfer and Properties, Wiley, New York, Chaps. 4 and 7.
5. Duarte, F. J., and Hillman, L. W., 1990, Dye Laser Principles, Academic Press, San Diego.
Cited by
24 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献