Figure 2

(a) Classical AL. Intensity measured by a scanning fiber (configuration I); (b) Photon probability density measured with scanning fiber and SPCM (configuration I); (c) One-photon-at-a-time adaptive focusing obtained after the optimization procedure (configuration II); (d) Localization length of the mode plotted versus the localization length after the optimization procedure retrieved for 6 different modes. Error on the individual measurement is smaller than the marker size. The open circle with error bars represents the average over all the investigated localizations.