Tilted Gaussian beam propagation in inhomogeneous media

Yakir Hadad, Timor Melamed

Research output: Contribution to journalArticlepeer-review

Abstract

The present work is concerned with applying a ray-centered non-orthogonal coordinate system which is a priori matched to linearly-phased localized aperture field distributions. The resulting beam-waveobjects serve as the building blocks for beam-type spectral expansions of aperture fields in 2D inhomogeneous media that are characterized by a generic wave-velocity profile. By applying a rigorous paraxial-asymptotic analysis, a novel parabolic wave equation is obtained and termed "Non-orthogonal domain parabolic equation"-NoDope. Tilted Gaussian beams, which are exact solutions to this equation, match Gaussian aperture distributions over a plane that is tilted with respect to the beam-axes initial directions. A numerical example, which demonstrates the enhanced accuracy of the tilted Gaussian beams over the conventional ones, is presented as well.

Original languageEnglish
Pages (from-to)1840-1850
Number of pages11
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Volume27
Issue number8
DOIs
StatePublished - 1 Aug 2010
Externally publishedYes

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