Free-space propagation of second harmonic beams carrying optical vortices

A vorticity of free propagating SH beam produced in nonlinear crystal by combined beam composed of two coaxial Laguerre–Gaussian vortex beams is analyzed. It is revealed that the vortical structures of SH beam in the near and far fields are different when two vortex beams are carrying vortices with...

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Bibliographic Details
Published in:Optics communications 2003-01, Vol.215 (1), p.1-9
Main Authors: Orlov, S, Regelskis, K, Smilgevičius, V, Stabinis, A
Format: Article
Language:English
Subjects:
Diffraction
Diffraction and scattering
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Nonlinear optics
Optical vortex
Optics
Physics
Second harmonic
Wave optics
Wave propagation, transmission and absorption
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Summary:A vorticity of free propagating SH beam produced in nonlinear crystal by combined beam composed of two coaxial Laguerre–Gaussian vortex beams is analyzed. It is revealed that the vortical structures of SH beam in the near and far fields are different when two vortex beams are carrying vortices with topological charges of different signs. The diffraction of SH beam under free propagation is investigated. A qualitative agreement of the theoretical predictions with experimental results is obtained.
ISSN:0030-4018
1873-0310
DOI:10.1016/S0030-4018(02)02231-9