Authors:
Pawel Berczynski
and
Slawomir Marczynski
Affiliation:
West Pomeranian University of Technology, Poland
Keyword(s):
Spatiotemporal Complex Geometrical Optics, Asymmetric 3D Wave Packets, Spatiotemporal Evolution in Nonlinear Medium, Interaction of N 3D Gaussian Wave Packets in Nonlinear Medium, Kerr Type Medium.
Related
Ontology
Subjects/Areas/Topics:
Fiber Optics
;
Mobile Software and Services
;
Nonlinear Optics
;
Optics
;
Photonics
;
Photonics, Optics and Laser Technology
;
Telecommunications
;
Wireless Information Networks and Systems
Abstract:
The complex geometrical optics (CGO) was applied for the spatiotemporal evolution of arbitrary number of 3D mutually incoherent (with different carrier frequencies) Gaussian wave packets (GWPs) interacting and propagating in a nonlinear medium of Kerr type. The CGO reduced description of the propagation of the beam, the pulse and the wave packet to complex ordinary differential equations (ODE) This leads to exceptionally fast numerical algorithms. We observed high efficiency of the CGO method to compute interactions of arbitrary number of 3D Gaussian wave packets propagating in a nonlinear (anomalous) dispersive medium of the Kerr type. The derived CGO equations were compared with equations obtained by the variational method. CGO described the Gaussian beam propagation in free space as well as the Gaussian pulse spreading in the linear anomalous dispersive medium more illustratively than both the Fourier transform method and the Fresnel diffraction integral method. The spatiotemporal
CGO has been proven to be a method more practical than the spectral analysis, the variational method, the method of moments and the method of the generalized eikonal approximation. Complementary to the presented results, an on-line CGO solver, implemented in Javascript, is freely available at the authors’ website: http://slawek.ps.pl/odelia.html.
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