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Finite-mode analysis by means of intensity information in fractional optical systems
Tatiana Alieva1, Martin J Bastiaans
1Technische Universiteit Eindhoven, Faculteit Elektrotechniek, Eindhoven, The Netherlands.
Abstract:
It is shown how a coherent optical signal that contains only a finite number of Hermite-Gauss modes can be reconstructed from the knowledge of its Radon-Wigner transform-associated with the intensity distribution in a fractional-Fourier-transform optical system-at only two transversal points. The proposed method can be generalized to any fractional system whose generator transform has a complete orthogonal set of eigenfunctions.