Abstract
A new, to our knowledge, technique for determining the modal
content of partially coherent beams that are made up of an incoherent
superposition of Hermite–Gaussian modes is studied. The algorithm
makes use of the intensity profile of the beam at an arbitrarily chosen
transverse plane. Analytical derivations are presented for a
Gaussian Schell-model source and flat-topped beams, as well as an
analysis of their performances in the presence of experimental errors
and noise. Numerical simulations are performed to test the accuracy
and the stability of the recovery algorithm.
© 1999 Optical Society of America
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