Figure 4
From: Is there an optimal basis to maximise optical information transfer?
Total intensity of all input (a) measured HG probing beams and (b) measured LG probing beams. Total intensity of measured outputs of HG probing beams and LG probing beams through the free space (c,d), a 3 μm pinhole (e,f), a 5 μm pinhole (g,h), and a “few-mode” fibre (i,j). Total intensity of all eigenmodes of HG probing beams and LG probing beams through the free space (k,l), a 3 μm pinhole (m,n), through a 5 μm pinhole (o,p), and a “few-mode” fibre (q,r).
