  One dimensional laser-written modulated photonic lattices are known to be
particularly suitable for diffraction management purposes. Here, we address the
connection between discrete non-diffracting states and topological properties
in such devices through the experimental observation and identification of
three classes of non-diffracting state. The first one corresponds to
topologically protected edge states, recently predicted in Floquet topological
insulators, while the second and third are both bulk modes. One of them
testifies of a topological transition, although presenting topological features
different from those of the edge states, whether the other one result from
specific band structure engineering.
