Analyis of Fibre Laser’s Optical Construction from the End of the Beam Guiding Optical Fibre to the Focal Spot

Meszlényi, György and Bitay, Enikő (2022) Analyis of Fibre Laser’s Optical Construction from the End of the Beam Guiding Optical Fibre to the Focal Spot. ACTA MATERIALIA TRANSYLVANICA (EN), 5 (2). pp. 72-77. ISSN 2601-8799

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Abstract

In material-processing fiber lasers, the resonator in the closed box produces the laser radiation. Even with the same resonator, the diameter of the laser beam transporting fiber optics and the properties of the optical elements in the laser focusing head decide the cross-section of the focused laser beam used for machining. If we summarize the formulas in different sources in the literature, we can predict the effect of each optical element: what will happen if we choose another focusing lens, put a beam expander in the system, set on the beam expander how many times the laser beam expands. The other important point is that if we want to repeat an experiment or start a production process based on a scientific publication, then in addition to the resonator, it would be good to know the data of the optical elements in the focusing head, which is usually incomplete in the presented articles, but we can determine them approximately using the four formulas listed in the article.

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