Asymptotic residual pump transmission characteristics in laser-induced stimulated Brillouin scattering

The fraction of residual transmitted pump power following backscattering of the backward-traveling-wave (BTW)-type parametric interactions such as stimulated Brillouin scattering has a characteristic asymptotic exponential decay with pump excitation. This scattering mechanism may very well constitute an inherent limiting factor in pump penetration into an interaction medium.