9 January 2021 Focusing characteristics of optical vortex passing through a Fresnel zone plate
Author Affiliations +
Abstract

The focusing characteristics of Fresnel zone plate (FZP) on vortex beams at 1550 nm are investigated. Employing the Fresnel diffraction integral, the diffraction characteristics on different circular structures are calculated. Many calculations and measurements of the transmission light field-phase distribution demonstrate that the focusing characteristics of the vortex beam through FZP are similar to Gaussian beam. The effect of radius-dependent phase delay on the focus position is verified. At the same time, it is proved that the topological charge has nothing to do with the major focal position and the FZP will not change the topological charge of the incident vortex beam.

© 2021 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2021/$28.00 © 2021 SPIE
Can Cui, Zhi Wang, Xiangkong Zhan, Huiying Wang, Jian Wang, Lanlan Liu, Zhiyong Li, and Chongqing Wu "Focusing characteristics of optical vortex passing through a Fresnel zone plate," Optical Engineering 60(1), 016101 (9 January 2021). https://doi.org/10.1117/1.OE.60.1.016101
Received: 25 September 2020; Accepted: 28 December 2020; Published: 9 January 2021
Lens.org Logo
CITATIONS
Cited by 2 scholarly publications.
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Spiral phase plates

Diffraction

Zone plates

Gaussian beams

Optical vortices

Optical simulations

Optical engineering

RELATED CONTENT


Back to Top