Measure the arbitrary topological charge of perfect optical vortex beams by using the dynamic angular double slits

Zhao, Yuanyuan; Huang, Xiao-Ting; Chang, Zehong; Wang, Xiaoli; Zhang, Pei

doi:10.1364/oe.439031

Cited by 9 publications

(2 citation statements)

References 38 publications

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“…The vortex beam has been extensively studied over the past 30 years [10][11][12][13][14][15][16][17], and has significant applications in optical communications [18][19][20], optical micro-manipulation [21,22], optical trapping [23,24], and so on. The most common vortex beams, such as Laguerre Gaussian beams [25][26][27], Bessel Gaussian beams [28][29][30] and perfect optical vortex beams [31][32][33], have fixed paraxial local topological charge (PLTC) during propagation.…”

Section: Introductionmentioning

confidence: 99%

Generation of the Anomalous Vortex Beam by Spiral Axicon Implemented on Spatial Light Modulator

et al. 2022

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The anomalous vortex beam (AVB), whose paraxial local topological charge varies with propagation, has potential applications in quantum information, laser beam shaping, and other fields. However, there are currently no efficient optical devices to generate AVBs. In this paper, we propose an efficient pure-phase device called spiral axicons. We theoretically analyze the spiral axicon, and then experimentally verify its performance by implementing a spiral axicon on spatial light modulator. Our work provides an alternative method for generating AVB, which will facilitate its application in different fields.

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Section: Introductionmentioning

confidence: 99%

Generation of the Anomalous Vortex Beam by Spiral Axicon Implemented on Spatial Light Modulator

et al. 2022

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“…[5] The diameter of the light ring is strongly dependent on the TC, hindering the coupling of multiple OVs in an optical fibre. [6] To solve this problem, Ostrosky et al proposed the concept of the perfect optical vortex (POV), [7] which exhibits a constant intensity profile and a radius irrespective of the TC. [8,9] For conventional OV and POV beams, the OAM distribution on the ring is uniform.…”

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Multichannel Superposition of Grafted Perfect Vortex Beams

et al. 2022

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The OV beam can be converted into a doughnut-shaped ring with the transverse component of Poynting vectors. Owing to the azimuthally dependent phase, an OV beam possesses an orbital angular momentum (OAM), which plays a vital role in various applications such as optical communications, [2] optical imaging, [3] particle manipulation, [4] and OAM microlasers. [5] The diameter of the light ring is strongly dependent on the TC, hindering the coupling of multiple OVs in an optical fibre. [6] To solve this problem, Ostrosky et al. proposed the concept of the perfect optical vortex (POV), [7] which exhibits a constant intensity profile and a radius irrespective of the TC. [8,9] For conventional OV and POV beams, the OAM distribution on the ring is uniform. This uniformity is not suitable for applications where versatile OAM distributions are needed, e.g., multiparticle trapping and manipulation. Therefore, noncanonical optical vortices are proposed to tackle these challenges. Examples include spiral OAM distributions, [10] nonuniform hollow circular OAM distributions, [11] and structured OAM distributions. [12] However, these OAM distributions are strongly dependent on the intensity and the local OAM modulation is impossible. A grafted optical vortex, which is generated through grafting two or more spiral phase profiles of optical vortex beams, has a controllable OAM distribution and constant intensity. [13] Recently, grafted perfect vortex beams (GPVBs) have attracted much attention due to their unique optical properties (e.g., versatile OAM distributions) and potential applications (e.g., more options for particle manipulation). However, the generation and manipulation of GPVBs are more challenging and complicated due to the involvement of an additional phase profile of a lens and that of an axicon. The optical setups currently being used for generating GPVBs are complex, requiring numerous optical components, including spatial light modulators, lenses, pinhole filters, polarizers, and dichroic mirrors, [13] which result in large space requirement and high cost. These optical systems are impractical for many applications, and hence there is a pressing requirement for a compact, simple, and efficient approach to generating and manipulating GPVBs.Optical metasurfaces have been used in a range of ultrathin optical devices, including metalenses, [14][15][16][17][18] polarization detectors, [19][20][21] holograms, [22][23][24][25] and high-resolution imaging. [26,27]

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Detection of topological charge for composite perfect vortex beams in atmospheric turbulence

Hongyan,

Yuejiao,

Chenyin

et al. 2023

Optik

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Measure the arbitrary topological charge of perfect optical vortex beams by using the dynamic angular double slits

Cited by 9 publications

References 38 publications

Generation of the Anomalous Vortex Beam by Spiral Axicon Implemented on Spatial Light Modulator

Generation of the Anomalous Vortex Beam by Spiral Axicon Implemented on Spatial Light Modulator

Multichannel Superposition of Grafted Perfect Vortex Beams

Detection of topological charge for composite perfect vortex beams in atmospheric turbulence

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