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High quality quasi-Bessel beam generated by round-tip axicon
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SYSNO ASEP 0314456 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title High quality quasi-Bessel beam generated by round-tip axicon Title Generování vysoce kvalitního Besselovského svazku pomocí axiconu s oblým vrcholem Author(s) Brzobohatý, Oto (UPT-D) RID, ORCID, SAI
Čižmár, Tomáš (UPT-D) RID, ORCID, SAI
Zemánek, Pavel (UPT-D) RID, SAI, ORCIDSource Title Optics Express. - : Optical Society of America - ISSN 1094-4087
Roč. 16, č. 17 (2008), s. 12688-12700Number of pages 13 s. Language eng - English Country US - United States Keywords fourier optics and signal processing ; spatial filtering ; laser beam shaping Subject RIV BH - Optics, Masers, Lasers R&D Projects LC06007 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) FT-TA2/059 GA MPO - Ministry of Industry and Trade (MPO) CEZ AV0Z20650511 - UPT-D (2005-2011) UT WOS 000259268700029 DOI 10.1364/OE.16.012688 Annotation We study theoretically and experimentally the spatial intensity distribution of the zero-order Bessel beam formed by the axicon which possess a rounded tip. Such a tip generates a refracted beam that interferes with the quasi-Bessel beam created behind the axicon. In turn an undesired intensity modulation occurs that significantly disturbs the unique properties of the quasi-Bessel beam We show how the spatial filtration of the beam in the Fourier plane improves this spatial beam distribution and removes the undesired modulation.We use an efficient numerical method based on Hankel transformations to simulate the propagation of the beam behind the axicon and filter. We experimentally measure the intensity distribution of the beam in many lateral planes and subsequently reconstruct the spatial intensity distribution of the beam. Computed and measured beam distributions are compared and the obtained agreement is very good. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2009
Number of the records: 1