  Controlling the dynamics of topologically protected spin objects by all
optical means promises enormous potential for future spintronic applications.
Excitation of bubbles and skyrmions in ferrimagnetic [Fe(0.35 nm)/Gd(0.40
nm)]$_{160}$ multilayers by ultrashort laser pulses leads to a periodic
modulation of the core diameter of these spin objects, the so-called breathing
mode. We demonstrate versatile amplitude and phase control of this breathing
using a double excitation scheme, where the observed dynamics is controlled by
the excitation delay. We gain insight into both the time scale on which the
breathing mode is launched and the role of the spin object size on the
dynamics. Our results demonstrate that ultrafast optical excitation allows for
precise tuning of the spin dynamics of trivial and non-trivial spin objects,
showing a possible control strategy in device applications.
