Two different experimental techniques for preparing and analysing superpositions of
Gaussian and Laguerre–Gaussian modes are presented. These involve exploiting an
interferometric method in one case and using computer-generated holograms in the other. It
is shown that by shifting a hologram with respect to an incoming Gaussian beam, different
superpositions of the Gaussian and the Laguerre–Gaussian beam can be produced. An
analytical expression connecting the relative phase, the amplitudes of the modes and the …

Two different experimental techniques for preparing and analysing superpositions of
Gaussian and Laguerre–Gaussian modes are presented. These involve exploiting an
interferometric method in one case and using computer-generated holograms in the other. It
is shown that by shifting a hologram with respect to an incoming Gaussian beam, different
superpositions of the Gaussian and the Laguerre–Gaussian beam can be produced. An
analytical expression connecting the relative phase, the amplitudes of the modes and the …