Fig. 8
Measured (solid, blue) and calculated (dashed, red) normalized spectra \({\left|{\gamma }_{{LP}11,{LP}\mathrm{11,0}\it m}\left(\Omega \right)\right|}^{2}\) of intra-modal forward Brillouin scattering in the \({{LP}}_{11}\) modes group of a few-mode fiber, through the radial acoustic modes \({R}_{0m}\)
