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Proceedings Paper

Free-space propagation of extreme NA polarized beams using the vector plane wave spectrum method and multi-gigabyte FFTs
Author(s): Alan W. Greynolds
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Paper Abstract

Certain lasers can have initial waists only a wavelength or less in size. Therefore, collection optics with extreme numerical apertures (NA) approaching unity are required. Although the design of these macro-optics using geometrical ray-tracing is trivial, determining the exact vectorial field entering them is not. The theory and implementation of Fourier, or plane wave spectrum (PWS), based methods is presented for not only the far-field, but also the near and intermediate. A real-world example is given for which at one point a 12 gigabyte two-dimensional fast Fourier transform (FFT) is required and unexpected polarization effects are observed.

Paper Details

Date Published: 1 October 2009
PDF: 10 pages
Proc. SPIE 7427, Optical Modeling and Performance Predictions IV, 742702 (1 October 2009); doi: 10.1117/12.825489
Show Author Affiliations
Alan W. Greynolds, Ruda-Cardinal Inc. (United States)

Published in SPIE Proceedings Vol. 7427:
Optical Modeling and Performance Predictions IV
Mark A. Kahan, Editor(s)

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