The influence of acoustic wave diffraction on stored light based on SBS in an optical fiber

Abstract

When light is stored in an optical fiber via stimulated Brillouin scattering (SBS) process, data-pulse from the storage to the restoration through two processes relates to acoustic wave, so the effects of an acoustic wave diffraction have to be considered. We numerically solve SBS coupled wave equations containing acoustic diffraction and study the effects of acoustic wave diffraction on stored light when the radius of fiber as storage medium is different. The results of light storage are obtained in the two situations presence and absence of acoustic wave diffraction when the control-pulse and the data-pulse have different temporal distribution profile. The results show that the acoustic diffraction influence on the light storage is more and more small with the fiber radius increasing, and when the fiber radius is 6 micron, the effects is disappear. The results also show that acoustic diffraction effects are minimum when data-pulse and control-pulse are rectangular and Gaussian distribution profile respectively.