## Propagation of Laguerre-Bessel-Gaussian beams

JOSA A, Vol. 17, Issue 11, pp. 2010-2018 (2000)

http://dx.doi.org/10.1364/JOSAA.17.002010

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### Abstract

New exact solutions to the paraxial wave equation are obtained in the form of a product of Laguerre polynomials, Bessel functions, and Gaussian functions. In the limit of large Laguerre–Gaussian beam size, the Bessel factor dominates and the solution sets reduce to the modes of closed resonators, hollow metal waveguides, and dielectric waveguides. In the opposite limit the solutions reduce to Laguerre–Gaussian modes of open resonators and graded-index waveguides. These solutions are valid for electromagnetic waves traveling through free space, and they are valid for propagation through circularly symmetric optical systems representable by *ABCD* matrices as well. An interesting feature of the new solution set is the existence of three mode indices, where only two are required for an orthogonal expansion. As an example, Laguerre–Gaussian beam propagation through an optical system that contains a Bessel-like amplitude filter is discussed.

© 2000 Optical Society of America

**OCIS Codes**

(050.1960) Diffraction and gratings : Diffraction theory

(060.2310) Fiber optics and optical communications : Fiber optics

(140.3410) Lasers and laser optics : Laser resonators

(260.0260) Physical optics : Physical optics

(350.5500) Other areas of optics : Propagation

**Citation**

Anthony A. Tovar, "Propagation of Laguerre-Bessel-Gaussian beams," J. Opt. Soc. Am. A **17**, 2010-2018 (2000)

http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-17-11-2010

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