AI Article Synopsis
- The text discusses a modal approach to understanding how paraxial light propagates, which allows for fast and easy calculations by breaking down the transverse field into elements with known behaviors.
- By using this method instead of plane waves, it avoids numerical issues common in other approaches and provides a clearer intuition on field propagation.
- The authors validate their theoretical model through comparisons with numerical methods and experimental examples, suggesting this approach will be beneficial for studying optical fields.
Article Abstract
Here we outline a description of paraxial light propagation from a modal perspective. By decomposing the initial transverse field into a spatial basis whose elements have known and analytical propagation characteristics, we are able to analytically propagate any desired field, making the calculation fast and easy. By selecting a basis other than that of planes waves, we overcome the problem of numerical artifacts in the angular spectrum approach and at the same time are able to offer an intuitive understanding for why certain classes of fields propagate as they do. We outline the concept theoretically, compare it to the numerical angular spectrum approach, and confirm its veracity experimentally using a range of instructive examples. We believe that this modal approach to propagating light will be a useful addition to the toolbox for propagating optical fields.
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| http://dx.doi.org/10.1364/JOSAA.432431 | DOI Listing |
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