20 November 2008 Quasi-Bessel beam generated by oblate-tip axicon
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Proceedings Volume 7141, 16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics; 714126 (2008) https://doi.org/10.1117/12.822425
Event: 16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2008, Polanica Zdroj, Poland
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.
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Oto Brzobohatý, Oto Brzobohatý, Tomáš Cižmár, Tomáš Cižmár, Pavel Zemánek, Pavel Zemánek, } "Quasi-Bessel beam generated by oblate-tip axicon", 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; https://doi.org/10.1117/12.822425
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