Stimulated Brillouin gain spectroscopy in a confined spatio-temporal domain (30 μm, 170 ns)Lionel Djadaojee, Albane Douillet and Jules GruckerEur. Phys. J. Appl. Phys., 89 3 (2020) 30701DOI: https://doi.org/10.1051/epjap/2020200012