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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 7, Iss. 1 — Jan. 1, 1990
  • pp: 73–83

Mutual beam reshaping by two interacting radiation modes

A. W. McCord and R. J. Ballagh  »View Author Affiliations


JOSA B, Vol. 7, Issue 1, pp. 73-83 (1990)
http://dx.doi.org/10.1364/JOSAB.7.000073


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Abstract

The steady-state propagation of spatially nonuniform σ+ and σ beams coupled by means of a homogeneously broadened J = ½↔J = ½ transition is shown to give rise in many cases to a spatial separation of the beams The nature of the nonlinear coupling, which allows the response of one beam to be strongly affected by the presence of the other, and which is the root cause of the phenomenon, is examined in detail. Results for propagation both on and off resonance, with varying initial spatial configurations, demonstrate that the phenomenon of self-induced spatial separation of the copropagating components persists over a wide range of situations. A physical explanation is given in terms of an encoding/diffraction sequence, and the experimental implications are discussed

© 1990 Optical Society of America

History
Original Manuscript: February 1, 1989
Manuscript Accepted: August 31, 1989
Published: January 1, 1990

Citation
A. W. McCord and R. J. Ballagh, "Mutual beam reshaping by two interacting radiation modes," J. Opt. Soc. Am. B 7, 73-83 (1990)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-7-1-73


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References

  1. By beam reshaping we mean any self-induced change in the transverse intensity profile of a beam. This definition encompasses self-focusing, self-trapping, self-defocusing, self-bending, filamentation, and other more complicated phenomena.
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  28. We have verified this self-guiding nature of the final field configuration numerically by turning off the effect of the medium after the pure circularly polarized annulus and beam have formed. As expected, the σ+annulus collapses rapidly back on axis, and the σ−beam spreads diffractively.
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  34. J. C. Wang, H. A. Bachor, D. E. McClelland, Department of Australian Physics University National Australia Canberra (personal communication, 1989).

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