Dataset of numerical model for enhancing stimulated Brillouin scattering in optical fibers

Stimulated Brillouin scattering (SBS) is useful, among others for
generating slow light, sensing and amplification. SBS was previously
viewed as a penalty due to the limitation on optical power in high-powered
photonic applications. However, considering the many possible applications
using SBS, it is now of interest to enhance SBS in areas of Brillouin
frequency shift together with Brillouin Gain. A numerical model, using a
fully vectorial approach, by employing the finite element method, was
developed to investigate methods for enhancing SBS in optical fiber. This
paper describes the method related to the numerical model and discusses
the analysis between the interactions of horizontal, shear and hybrid
acoustic modes; and optical modes in optical fiber. Two case studies were
used to demonstrate this. Based on this numerical model, we report the
influence of core radius, clad radius and effective refractive index on
the Brillouin frequency shift and gain. We observe the difference of
Brillouin shift frequency between a normal silica optical fiber and that
of a tapered fiber where nonlinearities are higher. Also observed, the
different core radii used and their respective Brillouin shift. For future
work, the COMSOL model can also be used for the following areas of
research, including simulating “surface Brillouin shift” and also to
provide in-sights to the Brillouin shift frequency vB of various
structures of waveguides, e.g circular, and triangular, and also to
examine specialty fibers, e.g. Thulium and Chalcogenide doped fibers, and
their effects on Brillouin shift frequency.