Propagation properties of Gaussian beam passing through a misaligned optical system with misaligned narrow slot aperture

By using approximate expression of the hard-edge narrow slot aperture function and generalized diffraction formula, an approximate analytical expression of the output field distribution for a Gaussian beam passing through an optical system with a misaligned narrow slot aperture has been derived. Smulation results show that the output field distribution is related with Gaussian beam parameters, aperture size, ABCD matrix elements and misaligned parameters. The effect of misaligned parameters on output field distribution are also illustrated quantitatively for given optical system and Gaussian beam, and results show that the transverse displacements of the aperture and the transverse displcement and the angle displacement of the optical system bring forth non-axisymmetric distribution of int