Abstract
I give analytical formulas for the gain of TE and TM electrostrictive stimulated Brillouin scattering (SBS) in a spherical microdroplet when both the laser and Brillouin frequencies coincide with single partial waves that correspond to Debye–Mie resonances. Numerical evaluations of the analytical formula for the gain of a resonant TM mode in a water droplet show that the SBS gain peaks at the ratio η of the bulk-medium laser wavelength to the acoustic wavelength that depends on the values of the partial-wave index m for the laser and the SBS fields. This dependence can be explained by a simple geometrical picture based on vector addition. In the cases studied, maximum SBS gain occurs when mB = −mL = ±|lL| (where lL is the laser partial-wave order), corresponding to laser and SBS waves that counterpropagate in a tightly guided mode around a great circle of a spherical droplet.
© 1991 Optical Society of America
Full Article | PDF ArticleMore Like This
C. D. Cantrell
J. Opt. Soc. Am. B 8(10) 2158-2180 (1991)
Bruce S. Masson
J. Opt. Soc. Am. B 8(2) 378-383 (1991)
Jian-Zhi Zhang, Gang Chen, and Richard K. Chang
J. Opt. Soc. Am. B 7(1) 108-115 (1990)