Propagation of a flattened Gaussian beam through multi-apertured optical ABCD systems

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By expanding the hard-aperture function into a finite sum of complex Gaussian functions, the recurrence propagation formula of a flattened Gaussian beam through multi-apertured optical ABCD systems is derived, and the propagation of a Gaussian beam is regarded as a special case in our theoretical model. The extension to the three-dimensional case is described. Numerical examples of the beam propagation through a multiple aperture-lens system and an aperture-spatial filter are given and compared with those by the straightforward numerical integration of the Collins formula. It is shown that our analytical results give a good trade-off between the computational time and accuracy, and provide a useful tool for simulating the beam propagation through complicated optical systems including multiple apertures and spatial filters. Finally, a comparison with the previous work is made and the main results obtained in this paper are summarized.

Document Type: Research Article


Affiliations: 1: College of Electronic Engineering, Sichuan Normal University, Chengdu 610066 2: Institute of Laser Physics & Chemistry, Sichuan University, Chengdu 610064

Publication date: December 1, 2003

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