Effect of Diffraction on Wigner Distributions of Optical Fields and how to Use It in Optical Resonator Theory. II -Unstable Resonators
Résumé
The second part of the article is devoted to field transfers by diffraction that are represented by fractional Fourier transformations whose orders are complex numbers. The corresponding effects on the Wigner distributions associated with optical fields are still represented by 4 × 4 matrices operating on the scaled phasespace, but unlike matrices involved in the first part, those matrices decompose into two matrices that essentially represent 2-dimensional hyperbolic rotations, not elliptical rotations. The result is applied to the theory of unstable resonators.
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