Figure 6
From: Optical tracking of picosecond coherent phonon pulse focusing inside a sub-micron object

Results for the Brillouin-oscillation envelope and fits. Analysis of the data for the case of radius Rf=1150 nm. (a) Normalized Brillouin-oscillation envelope E(t). (b) Equivalent plot of E′(x) for the lossless case as a function of the distance x for propagation from the front surface of the fibre to the back and vice versa.