  Several matrix approaches were developed to control light propagation through
multiple scattering media under illumination of ultrashort pulses of light.
These matrices can be recorded either with spectral or temporal resolution.
Thanks to wavefront shaping, temporal and spatial refocusing have been
demonstrated. In this work, we study how these different methods can be
exploited to enhance a two-photon excitation fluorescence process. We first
compare the different techniques on micrometer-size isolated fluorescent beads.
We then demonstrate point-scanning imaging of such fluorescent microbeads
located after a thick scattering medium, at a depth where conventional imaging
would be impossible because of scattering effects.
