Reconstructing the Poynting vector skew angle and wave-front of optical vortex beams via two-channel moir\'e deflectometery

TL;DR

This paper introduces a two-channel moiré deflectometry technique to accurately measure the wave-front and Poynting vector components of optical vortex beams, validated with q-plate generated beams.

Contribution

It presents a novel measurement method for optical vortex beams that simultaneously captures wave-front and Poynting vector components with high accuracy.

Findings

Measured topological charge matches theoretical predictions

Technique effectively characterizes optical vortex beam properties

Provides a new tool for optical beam analysis

Abstract

A novel approach based on the two-channel moir\'e deflectometry has been used to measure both wave-front and transverse component of the Poynting vector of an optical vortex beam. Generated vortex beam by the q-plate, an inhomogeneous liquid crystal cell, has been analyzed with such technique. The measured topological charge of generated beams are in an excellent agreement with theoretical prediction.