Off-axis spiral phase mirrors for generating high-intensity optical vortices

In this work, we present a novel, to the best of our knowledge, and practical method for generating optical vortices in high-power laser systems. Off-axis spiral phase mirrors are used at oblique angles of incidence in the beam path after amplification and compression, allowing for the generation of...

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Veröffentlicht in:Optics letters 2020-04, Vol.45 (8), p.2187-2190
Hauptverfasser: Longman, Andrew, Salgado, Carlos, Zeraouli, Ghassan, Apiñaniz, Jon I, Antonio Pérez-Hernández, Jose, Eltahlawy, M Khairy, Volpe, Luca, Fedosejevs, Robert
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Sprache:eng
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Zusammenfassung:In this work, we present a novel, to the best of our knowledge, and practical method for generating optical vortices in high-power laser systems. Off-axis spiral phase mirrors are used at oblique angles of incidence in the beam path after amplification and compression, allowing for the generation of high-power optical vortices in almost any laser system. An off-axis configuration is possible via modification of the azimuthal gradient of the spiral phase helix and is demonstrated with a simple model using a discrete spiral staircase. This work presents the design, fabrication, and implementation of off-axis spiral phase mirrors in both low- and high-power laser systems.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.387363