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Opt Lett. 2004 Jan 1;29(1):44-6.

Parabolic nondiffracting optical wave fields.

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Photonics and Mathematical Optics Group, Tecnológico de Monterrey, Monterrey, N.L. 64849, Mexico.


We demonstrate the existence of parabolic beams that constitute the last member of the family of fundamental nondiffracting wave fields and determine their associated angular spectrum. Their transverse structure is described by parabolic cylinder functions, and contrary to Bessel or Mathieu beams their eigenvalue spectrum is continuous. Any nondiffracting beam can be constructed as a superposition of parabolic beams, since they form a complete orthogonal set of solutions of the Helmholtz equation. A novel class of traveling parabolic waves is also introduced for the first time.


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