Modeling diffraction and imaging of laser beams by the mode-expansion method

Petrovic, Novak S. and Rakic, Aleksandar D. (2005) Modeling diffraction and imaging of laser beams by the mode-expansion method. Journal of The Optical Society of America B-optical Physics, 22 3: 556-566. doi:10.1364/JOSAB.22.000556


Author Petrovic, Novak S.
Rakic, Aleksandar D.
Title Modeling diffraction and imaging of laser beams by the mode-expansion method
Journal name Journal of The Optical Society of America B-optical Physics   Check publisher's open access policy
ISSN 0740-3224
Publication date 2005-03-01
Sub-type Article (original research)
DOI 10.1364/JOSAB.22.000556
Volume 22
Issue 3
Start page 556
End page 566
Total pages 11
Editor George I. Stegeman
Place of publication Washington, D.C., USA
Publisher Optical Society of America
Collection year 2005
Language eng
Subject C1
291702 Optical and Photonic Systems
230108 Harmonic and Fourier Analysis
240401 Optics and Opto-electronic Physics
700399 Communication services not elsewhere classified
Abstract We present a new method of modeling imaging of laser beams in the presence of diffraction. Our method is based on the concept of first orthogonally expanding the resultant diffraction field (that would have otherwise been obtained by the laborious application of the Huygens diffraction principle) and then representing it by an effective multimodal laser beam with different beam parameters. We show not only that the process of obtaining the new beam parameters is straightforward but also that it permits a different interpretation of the diffraction-caused focal shift in laser beams. All of the criteria that we have used to determine the minimum number of higher-order modes needed to accurately represent the diffraction field show that the mode-expansion method is numerically efficient. Finally, the characteristics of the mode-expansion method are such that it allows modeling of a vast array of diffraction problems, regardless of the characteristics of the incident laser beam, the diffracting element, or the observation plane. (C) 2005 Optical Society of America.
Keyword Optics
Laguerre-gaussian Beams
Finite Aperture Lens
Space Optical Interconnects
Focal Shift
Circular Aperture
Hermite
Irradiance
Resonators
Divergence
Millimeter
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 07:01:20 EST