Figure 1: Measured complex fields of HG and LG probing beams on CCD2.
From: Is there an optimal basis to maximise optical information transfer?
(a)–(d) show the measured beam profiles of 
, 
, 
and 
respectively (where the super- and subscripts of the HG beams relate to the horizontal and vertical index number and for the LG beams to the radial and azimuthal index number). (f)–(i) in bottom row show the corresponding measured phase functions. (e,j) Show the matrix of mode orthogonality in each set of 36 HG and LG probing beams respectively.
