RT info:eu-repo/semantics/article T1 On the first order dynamics of subphonon lifetime transient stimulated Brillouin scattering A1 Chamorro Posada, Pedro A1 Bengoechea de la Llera, J. K1 Brillouin scattering K1 Dispersión de Brillouin K1 Nonlinear optics K1 Óptica no lineal AB In this work, we address the phonon dynamics in the stimulated Brillouin scattering process. There exists a wide consensus on the fact that the slowly varying approximation for the acoustic field cannot be invoked in the transient subphonon regime. We present an analysis where we set the precise limits of validity of this approximation. Our study shows that the resonant behavior of the Stokes interaction permits, in general, a first order treatment of this process in the theoretical analysis of current practical applications. An improved-accuracy first order model is also put forward. Numerical calculations are used to support our conclusions. PB Elsevier SN 1068-5200 YR 2021 FD 2021 LK https://uvadoc.uva.es/handle/10324/47962 UL https://uvadoc.uva.es/handle/10324/47962 LA eng NO Optical Fiber Technology, 2021, vol. 65, 102592 NO Producción Científica DS UVaDOC RD 17-jul-2024