Document Type

Article

Publication Date

12-24-2018

Publication Title

Optics Express

ISSN

1094-4087

Volume

26

Issue

26

First Page

34007

Last Page

34015

DOI

https://doi.org/10.1364/OE.26.034007

PubMed ID

30650831

Abstract

We experimentally demonstrate that ptychographic coherent diffractive imaging can be used to simultaneously characterize the amplitude and phase of bichromatic orbital angular momenta-shaped vortex beams, which consist of a fundamental field, together with its copropagating second-harmonic field. In contrast to most other orbital angular momentum characterization methods, this approach solves for the complex field of a hyperspectral beam. This technique can also be used to characterize other phase-structured illumination beams, and, in the future, will be able to be extended to other complex fields in the extreme ultraviolet or X-ray spectral regions, as well as to matter waves.

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