Thermal self-broadening of strong light pulses in the course of their propagation in an absorbing aerosol

Yu. D. Kopytin, S. S. Khmelevtsov


Abstract: A theoretical investigation is made of the self-broadening of spatially bounded pulses of high-intensity light in a statistically homogeneous polydisperse medium. A solution is obtained for a transient temperature distribution in a medium with discrete heat-evolution centers. Stochastic equations are obtained for the description of the behavior of the dimensionless width of a light beam and of the weighted-mean radius of curvature of the phase front. The solutions are solved on a computer by the random sampling method. This method gives the mathematical expectation and the variance of the required quantities which are regarded as arithmetic means of a finite number of random realizations.

UDC: 621.378.4

PACS: 42.25.Dd, 42.25.Fx, 82.70.Rr, 02.50.Fz

Received: 29.10.1973

 English version: Soviet Journal of Quantum Electronics, 1974, 4:4, 439–442