Characterizing vortex beams from a spatial light modulator with collinear phase-shifting holography

Andersen, Jasmine M.; Alperin, Samuel N.; Voitiv, Andrew A.; Holtzmann, William G.; Gopinath, Juliet T.; Siemens, Mark E.

doi:10.1364/ao.58.000404

Cited by 43 publications

(20 citation statements)

References 28 publications

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“…In contrast to the mode-sorting techniques outlined above, modal decomposition techniques create a representation of the complex beam as a linear summation of the eigenmodes. Some of the modal decomposition techniques include the spatial and spectral ðS 2 Þ imaging technique, 210 numerical methods, 211,212 phase extraction methods, 213,214 and the optical correlation technique. 74,215,216 The relative merits of these techniques are mentioned below.…”

Section: Optical Correlation Techniquementioning

confidence: 99%

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Generation and decomposition of scalar and vector modes carrying orbital angular momentum: a review

et al. 2019

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Orbital angular momentum (OAM), one of the most recently discovered degrees of freedom of light beam field has fundamentally revolutionized optical physics and its technological capabilities. Optical beams with OAM have enabled a large variety of applications, including super-resolution imaging, optical trapping, classical and quantum optical communication, and quantum computing, to mention a few. To enable these and several other emerging applications, optical beams with OAM have been generated using a variety of methods and technologies, such as a simple astigmatic lens pair, one-/two-dimensional holographic optical elements, threedimensional spiral phase plates, optical fibers, and recent entrants such as metasurfaces. All these techniques achieve spatial light modulation and can be implemented with either passive elements or active devices, such as liquid crystal on silicon and digital micromirror devices. Many of these devices and technologies are not only used for the generation of amplitude phase-polarization structured light beams but are also capable of analyzing them. We have attempted to encompass a wide variety of such technologies as well as a few emerging methodologies, broadly categorized into generation and detection protocols. We address the needs of scientists and engineers who desire to generate/detect OAM modes and are looking for the technique (active or passive) best suited for their application. © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Section: Optical Correlation Techniquementioning

confidence: 99%

“…Phase extraction methods, such as phase-shifting digital holography, 213 require a reference beam to extract the phase structure of the complex field. Primary limitations of this technique are that it requires a stable interferometric setup and a coherent laser source at the receiver end.…”

Section: Optical Correlation Techniquementioning

confidence: 99%

Generation and decomposition of scalar and vector modes carrying orbital angular momentum: a review

et al. 2019

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“…In the field of optical micro-manipulation, measuring TCs, shaping OVBs, and regulating the distribution of singularities are pivotal. Traditional methods of measuring TCs are mainly based on interference and diffraction [35]. Since constraining by their self-focusing regions, these methods greatly reduce flexibility.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Optical Vortex Beam Generator via Cross-Phase Based on Metasurface

et al. 2022

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We propose a multifunctional optical vortex beam (OVB) generator via cross-phase based on a metasurface. Accordingly, we separately investigate the two different propagation characteristics of OVB modulated by the low-order cross-phase (LOCP) and the high-order cross-phase (HOCP) in a self-selected area. When LOCP modulation is added to OVB, topological charges can be measured for any order of OVB. Moreover, we achieve the rotation tunable performance successfully by adding the rotation component. Then, we realize the function of polygonal beam generation and singularities regulation with the HOCP. The order of the HOCP is exactly equal to the number of a polygon OVB’s sides. The waist radius and usable width of the beam lengthens as the distance of the self-selected area increases. When the conversion rate is doubled, the distance between singularities widens by about 0.5 μm. The proposed OVB generator provides a simple strategy for detecting the value of topological charges and achieving OVB shaping and singularity manipulation simultaneously. We hope this can open new horizons for promoting the development of photon manipulation, optical communication, and vortex beam modulation.

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“…Such a structured transparency converts the beam into a set of horizontal or vertical fringes, the pattern analysis of which allows one to obtain the OAM spectrum. The direct application of digital processing of interference patterns of a composite vortex beam [32] and a collinear phase-shifting holography [33] can be considered as the third interference technique. However, measurements in the listed above approaches lead to complete or partial damage of the combined beam and losses of useful information.…”

Section: Introductionmentioning

confidence: 99%

Digital Sorting of Optical Vortices in Perturbed Singular Beams

Volyar¹,

Bretsko²,

Akimova³

et al. 2021

Nonlinear Optics - From Solitons to Similaritons

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The chapter provides a brief overview of shaping and measuring techniques of the vortex spectra (squared amplitudes and initial phases of vortex modes) including radial indices. The main physical mechanisms causing the formation of laser beams with a complex vortex composition, in particular, in biological media, are indicated, and the need for a digital analysis of vortex spectra is substantiated. It is the analysis of vortex spectra that allows us to find the orbital angular momentum and informational entropy (Shannon's entropy) of perturbed laser beams in real time. In the main part of the chapter, we consider in detail a new approach for measuring vortex spectra without cuts and gluing of the wavefront, based on digital analyzing high-order intensity moments of complex beams and sorting the vortex beam in computer memory sells. It is shown that certain types of weak local inhomogeneities cause a vortex avalanche causing a sharp dips and bursts of the orbital angular momentum spectra and quick ups and downs of the informational entropy. An important object of analysis is also the vortex spectra of beams scattered by simple opaque obstacles such as a hole, a disk, and a sector aperture.

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Characterizing vortex beams from a spatial light modulator with collinear phase-shifting holography

Cited by 43 publications

References 28 publications

Generation and decomposition of scalar and vector modes carrying orbital angular momentum: a review

Generation and decomposition of scalar and vector modes carrying orbital angular momentum: a review

Multifunctional Optical Vortex Beam Generator via Cross-Phase Based on Metasurface

Digital Sorting of Optical Vortices in Perturbed Singular Beams

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