Many partially coherent beams are made up of a superposition of mutually uncorrelated Hermite–Gaussian modes. We prove that knowledge of the transverse intensity profile of such a beam is sufficient for evaluating the weights of the modes in an exact way. Simulations indicate that the proposed method resists noise well.
© 1998 Optical Society of America
F. Gori, M. Santarsiero, R. Borghi, and G. Guattari, "Intensity-based modal analysis of partially coherent beams with Hermite—Gaussian modes," Opt. Lett. 23, 989-991 (1998)