科研之友
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摘要
The flattened Gaussian apodization technique is employed to suppress the axial intensity oscillations, when a plane wave diffracts from a circular hole. Under different apodization parameters, the held intensities are simulated by the complete Rayleigh-Sommerfeld method in the scalar diffraction domain. Numerical results reveal that the axial intensity is uniform in a considerably long propagating range, within which the transverse intensity is also maintained stably. In addition, the flattened Gaussian apodization technique performs well in a wide wavelength band. It is expected to have many practical applications in optical coupling and optical communication systems.
