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Appl Opt. 2008 Jan 1;47(1):45-51.

Double Wigner distribution function of a first-order optical system with a hard-edge aperture.

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Department of Physics, Zhejiang University of Science and Technology, Hangzhou 310023, China.


The effect of an apertured optical system on Wigner distribution can be expressed as a superposition integral of the input Wigner distribution function and the double Wigner distribution function of the apertured optical system. By introducing a hard aperture function into a finite sum of complex Gaussian functions, the double Wigner distribution functions of a first-order optical system with a hard aperture outside and inside it are derived. As an example of application, the analytical expressions of the Wigner distribution for a Gaussian beam passing through a spatial filtering optical system with an internal hard aperture are obtained. The analytical results are also compared with the numerical integral results, and they show that the analytical results are proper and ascendant.

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