Spatial Beam Self-Cleaning in Second-Harmonic Generation

Autor:	R. Fona, Guy Millot, Stefan Wabnitz, Katarzyna Krupa, Badr Mohamed Ibrahim Shalaby, Vincent Couderc, Fabio Baronio, Alexis Labruyère, Alessandro Tonello, Alejandro B. Aceves
Jazyk:	angličtina
Rok vydání:	2020
Předmět:	Materials science Nonlinear optics Potassium titanyl phosphate lcsh:Medicine 01 natural sciences Article 010309 optics Crystal chemistry.chemical_compound Optics Brillouin scattering 0103 physical sciences 010306 general physics lcsh:Science Linear phase Multidisciplinary Multi-mode optical fiber business.industry ottica non lineare effetti traversi generazione di seconda armonica lcsh:R Single-mode optical fiber Second-harmonic generation chemistry Physics::Accelerator Physics lcsh:Q business Beam (structure)
Zdroj:	Scientific Reports, Vol 10, Iss 1, Pp 1-9 (2020) Scientific Reports
ISSN:	2045-2322
DOI:	10.1038/s41598-020-64080-7
Popis:	We experimentally demonstrate the spatial self-cleaning of a highly multimode optical beam, in the process of second-harmonic generation in a quadratic nonlinear potassium titanyl phosphate crystal. As the beam energy grows larger, the output beam from the crystal evolves from a highly speckled intensity pattern into a single, bell-shaped spot, sitting on a low energy background. We demonstrate that quadratic beam cleanup is accompanied by significant self-focusing of the fundamental beam, for both positive and negative signs of the linear phase mismatch close to the phase-matching condition.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f47ce36148af7d4adbdf8cb05c882ef http://link.springer.com/article/10.1038/s41598-020-64080-7 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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