Effects of small misalignments on the intensity and Strehl ratio for a laser beam focused by an off-axis parabola

Anno: 2016

Autori: Labate L., Ferrara P., Fulgentini L., Gizzi L.A.

Affiliazione autori: Istituto Nazionale di Ottica, Consiglio Nazionale Delle Ricerche, via Moruzzi 1, Pisa, 56124, Italy; Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, largo B. Pontecorvo 3, Pisa, 56127, Italy

Abstract: A general procedure is described to calculate the intensity and Strehl ratio, at a generic plane in the focal region, of a beam focused by an off-axis parabolic mirror in the presence of small misalignments. The general theoretical framework is first developed, which allows a full vector diffraction treatment in the case of general misalignments. Then, a parametric numerical study is reported, aimed at highlighting the tolerances of both the intensity and Strehl ratio for small misalignments, for different focusing and off-axis parabola parameters. A set of experimental measurements aimed at validating the theoretical model is also discussed.

Giornale/Rivista: APPLIED OPTICS

Volume: 55 (23)      Da Pagina: 6506  A: 6515

Maggiori informazioni: Italian Ministry of Health (GR-2009-1608935 D.I. AgeNaS); CNR; PRIN (PRIN2012AY5LEL); MIUR-FIRB (SPARX); INFN gResist and Plasma-med collaborations; Regione Toscana 09/03/2012 (protocollo ISTI-CNR No 0000745); European Union (653782-EuPRAXIA)
Parole chiavi: Sommerfeld Diffraction Formula; Electromagnetic-waves; Confocal Microscopy; Mirror; Integration; Surface; Acceleration; Electrons; Field
DOI: 10.1364/AO.55.006506

Citazioni: 9
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-04-20
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