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Proceedings Paper

Quasi-Bessel beam generated by oblate-tip axicon
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Paper Abstract

We focused here on the real shape of the tip of the axicon - which is not sharp but rather oblate. We simulated numerically and verified experimentally that tiny deviations of the tip shape from the ideal sharp profile induce significant oscillations of the beam intensity along its propagation. Such unwanted intensity modulation disturbs the unique properties of the quasi-Bessel beam - constant shape of the lateral intensity profile and especially slow variation of the on-axis intensity along the beam propagation. We demonstrate how the spatial filtration of the beam in the Fourier plane removes such undesired modulation and restores the properties of the quasi-Bessel beam.

Paper Details

Date Published: 20 November 2008
PDF: 10 pages
Proc. SPIE 7141, 16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 714126 (20 November 2008); doi: 10.1117/12.822425
Show Author Affiliations
Oto Brzobohatý, Institute of Scientific Instruments (Czech Republic)
Tomáš Cižmár, Institute of Scientific Instruments (Czech Republic)
Pavel Zemánek, Institute of Scientific Instruments (Czech Republic)


Published in SPIE Proceedings Vol. 7141:
16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics
Agnieszka Popiolek-Masajada; Elzbieta Jankowska; Waclaw Urbanczyk, Editor(s)

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