Abstract

In this paper, we consider using a binary curved fork grating not only for the simultaneous formation of several Bessel vortex beams but also for detecting the presence of angular harmonics (optical vortices) in an analyzed beam outside the focal plane. In this case, we use the effect of a longitudinal shift of focus (or correlation peak) when the lens is supplemented with an axicon. The combination of a lens and an axicon provides, in the focal plane, the generation of narrow light rings whose radii do not depend on the vortex phase component. Thus, the detection of an optical vortex cannot be carried out in the focal plane, but only at a certain distance from it, which provides additional security for information transmission. In addition, the use of these gratings makes it possible to simultaneously manipulate microparticles in various planes, and they can be used for fabricating complex three-dimensional metastructures as well as the single-shot pulse laser processing of transparent materials or polymers.

© 2020 Optical Society of America

Efficient characterization of optical vortices via diffraction from parabolic-line linear gratings

Pouria Amiri, Ali Mardan Dezfouli, and Saifollah Rasouli
J. Opt. Soc. Am. B 37(9) 2668-2677 (2020)

Fresnel and Fraunhofer diffraction of a Gaussian laser beam by fork-shaped gratings

Ljiljana Janicijevic and Suzana Topuzoski
J. Opt. Soc. Am. A 25(11) 2659-2669 (2008)

Generation of perfect optical vortices using a Bessel–Gaussian beam diffracted by curved fork grating

Mahdi Khodadadi Karahroudi, Bahman Parmoon, Mohammadreza Qasemi, Abolhasan Mobashery, and Hossein Saghafifar
Appl. Opt. 56(21) 5817-5823 (2017)

Characteristics of fork-shaped fringes formed by off-axis interference of two vortex beams

Jingbo Ma, Peng Li, Ziheng Zhou, and Yuzong Gu
J. Opt. Soc. Am. A 38(1) 115-123 (2021)

Theory and generation of heterogeneous 2D arrays of optical vortices by using 2D fork-shaped gratings: topological charge and power sharing management

Ali Mohammad Khazaei, Davud Hebri, and Saifollah Rasouli
Opt. Express 31(10) 16361-16379 (2023)