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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 22, Iss. 6 — Jun. 1, 2005
  • pp: 1200–1207

Local spectrum analysis of field propagation in an anisotropic medium. Part I. Time-harmonic fields

Igor Tinkelman and Timor Melamed  »View Author Affiliations

JOSA A, Vol. 22, Issue 6, pp. 1200-1207 (2005)

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The phase-space beam summation is a general analytical framework for local analysis and modeling of radiation from extended source distributions. In this formulation, the field is expressed as a superposition of beam propagators that emanate from all points in the source domain and in all directions. In this Part I of a two-part investigation, the theory is extended to include propagation in anisotropic medium characterized by a generic wave-number profile for time-harmonic fields; in a companion paper [ J. Opt. Soc. Am. A 22, 1208 (2005) ], the theory is extended to time-dependent fields. The propagation characteristics of the beam propagators in a homogeneous anisotropic medium are considered. With use of Gaussian windows for the local processing of either ordinary or extraordinary electromagnetic field distributions, the field is represented by a phase-space spectral distribution in which the propagating elements are Gaussian beams that are formulated by using Gaussian plane-wave spectral distributions over the extended source plane. By applying saddle-point asymptotics, we extract the Gaussian beam phenomenology in the anisotropic environment. The resulting field is parameterized in terms of the spatial evolution of the beam curvature, beam width, etc., which are mapped to local geometrical properties of the generic wave-number profile. The general results are applied to the special case of uniaxial crystal, and it is found that the asymptotics for the Gaussian beam propagators, as well as the physical phenomenology attached, perform remarkably well.

© 2005 Optical Society of America

OCIS Codes
(260.1180) Physical optics : Crystal optics
(350.5500) Other areas of optics : Propagation

Original Manuscript: October 14, 2004
Manuscript Accepted: December 11, 2004
Published: June 1, 2005

Igor Tinkelman and Timor Melamed, "Local spectrum analysis of field propagation in an anisotropic medium. Part I. Time-harmonic fields," J. Opt. Soc. Am. A 22, 1200-1207 (2005)

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