We first use the nonlocalized, fluctuating source model for the stimulated Brillouin scattering to get the exact spectrum of the Stokes wave in optical fibers with attenuation loss. A new relation for the evaluation of the critical pump power (or Brillouin threshold) depending on the fiber length is then introduced, which should be more precise than the well-known Smith formula. Furthermore, we give for the first time, to the best of our knowledge, an approximate solution for standard steady-state Brillouin equations, which consists of two simple relations.
© 2003 Optical Society of America
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(120.6780) Instrumentation, measurement, and metrology : Temperature
(290.5900) Scattering : Scattering, stimulated Brillouin
Sébastien Le Floch and Pierre Cambon, "Theoretical evaluation of the Brillouin threshold and the steady-state Brillouin equations in standard single-mode optical fibers," J. Opt. Soc. Am. A 20, 1132-1137 (2003)