Research on Fast Light of Stimulated Brillouin Scattering in Few-mode Fibers
LI Lijun
HOU Shanglin
Abstract：Time advancement of fast light in small signal regime is calculated by three wave coupling equations of stimulated Brillouin scattering in few-mode fibers in this paper,and the influence of fiber length and input pump power on time advancement,Brillouin threshold and broadening factor of LP01 mode and LP11 mode in few-mode fibers are simulated by finite element method.The results show that Brillouin thresholds of both modes decrease with the increase of the effective length in a few-mode fiber,time advancement also increases with the increase of pump power and fiber length,but broadening factor shows the opposite trend.When the optical fiber length is 2 km and input pump power is 0.5 W,time advancement of LP01 mode and LP11 mode are 388 ns and 273 ns,and the corresponding broadening factors are 0.869 and 0.910,respectively.
Keywords：few-mode fiberfast lightbroadening factorstimulated brillouin scattering
Publication Date：2025-09-20
Online Publishing Date：2025-12-23(First online date of this platform, not the publication date of the document)
Pages：6( 83-88 )