Wavefront reconstruction of a non-diffracting structured laser beam

0584221 - ÚFP 2024 RIV US eng J - Journal Article
Dušek, M. - Gayde, J.Ch. - Šulc, Miroslav
Wavefront reconstruction of a non-diffracting structured laser beam.
Optics Express. Roč. 31, č. 25 (2023), s. 42099-42110. ISSN 1094-4087
Institutional support: RVO:61389021
Keywords : structured laser beam * wavefront * Bessel beam
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 3.8, year: 2022
Method of publishing: Open access
https://opg.optica.org/oe/fulltext.cfm?uri=oe-31-25-42099&id=543938

The Structured Laser Beam (SLB) is a pseudo-non-diffracting laser beam that shares many characteristics with a Bessel beam. However, it can theoretically propagate over an unlimited distance while maintaining an extremely low inner core divergence of only 0.01 mrad. This makes it a promising candidate for precise long-distance alignment applications such as the alignment of particle accelerator components at CERN. In this work, a novel method to assess the symmetrical wavefront aberrations induced by an SLB generator is presented. Our approach is based on the analysis of a single-intensity distribution of an SLB. The coefficients of the Zernike polynomials are estimated using artificial intelligence before least-squares fitting is used to refine the result. This approach ensures that the fitting avoids local minima. This method provides a novel way to analyze the optical aberrations induced by the SLB generator.
Permanent Link: https://hdl.handle.net/11104/0352185