In this visualisation we analyse the transverse electric field for the TE01, TM01, HE11, EH11, HE21 and HE23 modes, in a two layer step-index optical fibre. The techniques used here consist of two parts. First, the transverse electric field was indicated by the use of arrows. The length of the arrows represents the magnitude of the field and the direction of the arrows represents the direction of the transverse electric field. The context of these arrows was provided by plots showing the magnitude of the transverse electric field as a coloured disc behind the arrows.
From Figure 7 we can see that the TE01 mode seems to be independent
of 
since the electric field has no component, resulting in
arrows which form concentric circles. Similarly, Figure 8
shows that the TM01 mode is independent of 
since the electric field
vectors have no components, resulting in arrows pointing radially
outward from the centre. From Figures 9 and 10
we can see that the HE11 and EH11 modes are symmetric about the 
axis.
Also, Figures 11 and 12 show a two-fold axial
symmetry of the HE21 and HE23 modes respectively.
