Figure 2
From: Is there an optimal basis to maximise optical information transfer?
Measured output complex fields of probing beams, 
(top row) and 
(bottom row), through (a,e) the free space, (b,f) a 5 μm pinhole, (c,g) a 3 μm pinhole and (d,h) a “few-mode” fibre. False colour map (i) is used to present the complex fields with the hue showing the intensity and the color showing the phase.
