Fourier Transform of Annular Beams
D. N. Astadjov (Metal Vapor Lasers Department, Georgi Nadjakov, Institute of Solid State Physics, Bulgarian Academy of Sciences, Sofia,, Bulgaria)
TL;DR
This paper analyzes the Fourier transform of annular beams with a flat two-level geometry, focusing on their far-field intensity patterns and behavior at extreme annularity values.
Contribution
It provides a detailed characterization of the focal beam profile of annular beams, including behavior at extreme annularity, which is novel.
Findings
Far-field intensity patterns depend on annularity.
Extreme annularity causes unique focal beam behaviors.
Analytical characterization of annular beam Fourier transforms.
Abstract
Fourier transform is applied to annular beams of simplified flat two-level geometry: bright outer ring with a darker core. The pattern of focal beam profile (i.e. far field) is calculated and characterized with respect of its intensity structure. Specific behavior is observed for extreme annularity values.
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Taxonomy
TopicsLaser and Thermal Forming Techniques · Composite Structure Analysis and Optimization