Portal de Periódicos da CAPES

Double helical laser beams based on interfering first-order Bessel beams

2011; Optica Publishing Group; Volume: 28; Issue: 7 Linguagem: Inglês

10.1364/josaa.28.001462

1520-8532

Nicholas Barbieri, Matthew Weidman, Gregory Katona, Matthieu Baudelet, Zachary A. Roth, Eric G. Johnson, Georgios A. Siviloglou, Demetrios N. Christodoulides, Martin Richardson,

Advanced Fiber Laser Technologies

We demonstrate the generation of a nondiffracting double helical beam using axicons and ±1 vortex phase plates in a common-path interferometric system. Using linear diffraction theory, a simple analytical expression describing beam propagation is shown to agree with both experiments and Fresnel-diffraction-based simulations. Experiments are performed using continuous laser light in addition to ultrafast pulses, demonstrating that the common-path arrangement and the diffraction theory work equally well for both cases.