Sorting of spatially incoherent optical vortex modes

Bezerra, Daniel O.; Amaral, João Paulo; Fonseca, E. J. S.; Alves, Cleberson R.; Jesus‐Silva, Alcenísio J.

doi:10.1038/s41598-020-59428-y

Cited by 8 publications

(6 citation statements)

References 34 publications

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“…A few research efforts were put forwarded in recent years to tackle the challenges of vortex beam propagation through scattering medium by exploiting the information carrying potential of speckle fields [45,49,[57][58][59]. In addition, a few techniques were demonstrated for helicity and topological charge (TC) determination of partially coherent vortex beams [60,61], robustness investigation of low coherent vortex beam propagation through noisy and turbulent media [62,63], discrimination of incoherent vortex states of light [64], and sorting of incoherent optical vortex modes [65]. This section describes the recently developed technique for OAM mode detection and characterization by exploiting the potential features of GDH system.…”

Section: Recovery and Characterization Of Orbital Angular Momentum Modesmentioning

confidence: 99%

Ghost Diffraction Holography: A Correlation Assisted Quantitative Tool for Complex Field Imaging and Characterization

Kumari¹,

Chen²,

Singh³

et al. 2023

Holography - Recent Advances and Applications

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The fascinating domain of ghost imaging has been a subject of interest in the fundamental and applied research for the last two decades with its promising applications in various imaging and characterization scenarios. In this chapter, we discuss the recently developed ghost diffraction holography (GDH) system with due emphasis on the capability of quantitative complex-field imaging in the ghost framework. The development of the unconventional correlation-assisted GDH technique by adopting the holography concept in ghost diffraction scheme is described, and the quantitative phase imaging capability is demonstrated in the microscopy. In addition, the technique exploits the spatial statistics of time-frozen recorded speckle intensity with snapshot detection in ghost framework, which could broaden the applications of the developed microscopy to real-time imaging of two- and three-dimensional biological samples with high resolution. Furthermore, we discuss demonstrated applications of the technique in the imaging various spatially varying complex-valued macroscopic and microscopic samples and the potential application of the technique in the recovery and characterization of orbital angular momentum modes encoded in spatially incoherent speckle field.

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Section: Recovery and Characterization Of Orbital Angular Momentum Modesmentioning

confidence: 99%

Ghost Diffraction Holography: A Correlation Assisted Quantitative Tool for Complex Field Imaging and Characterization

Kumari¹,

Chen²,

Singh³

et al. 2023

Holography - Recent Advances and Applications

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“…Para casos mais específicos, como por exempo demonstrar a conservação do momento angular orbital (MAO) de um feixe de luz passando por uma abertura [20], usar a ortogonalidade dos modos azimutais para misturar e separar diferentes estados de MAO da luz [21] ou com o intuito de realizar micromanipulação com a luz [22], é interessante trabalhar apenas com os modos Laguerre-Gauss azimutais U m,0 (ρ, φ, z) = U m (ρ, φ, z), dessa maneira, a Equação (47) é reduzida a…”

Section: Modos Laguerre-gaussunclassified

Moldando a luz: a física por trás dos feixes ópticos

Amaral¹,

Lima

2021

Rev. Bras. Ensino Fís.

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O surgimento do laser foi um marco para o avanço tecnológico e científico. Por isso há vários artigos descrevendo o processo histórico e suas aplicações, porém, sabendo que os feixes lasers têm perfil espacial gaussiano no plano transverso à propagação, nota-se que a literatura sobre luz estrutura com outras distribuições espaciais ainda é pouco divulgada. Com o intuito de contribuir para sanar esta carência, o presente trabalho pretende mostrar a natureza dos feixes ópticos respeitando o marco histórico de cada feixe e descrevendo matematicamente suas características, iniciando com feixes gaussianos passando por modos Hermite-Gauss, Laguerre-Gauss em seguida terminamos com feixes Bessel.

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“…The detection techniques for OAM states are mainly divided into optical and machine learning methods [9]. Optical detection methods include interferometry [10][11][12], diffraction [13][14][15], mode conversion [16], and coordinate transformation [17][18][19][20][21][22][23][24], etc., which have the characteristics of fast detection speed and a high utilization rate of light field information. However, most optical detection methods such as grating diffraction, aperture diffraction, and Mach Zender interferometry can only detect beams composite of at most two OAM states with low detection efficiency.…”

Section: Introductionmentioning

confidence: 99%

Separation and detection of orbital angular momentum states of composite vortex beams in atmospheric turbulence channels

Hongyan,

Han,

Yuejiao

et al. 2023

J. Opt.

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The separation and detection of compound orbital angular momentum (OAM) modes are the basis for achieving high-speed and high-capacity communication, but the atmospheric turbulence causes distortion of the phase fronts of vortex beams, which hinders the recognition of OAM modes. To solve this problem, in this work, we propose and investigate a joint scheme of combining the Gerchberg–Saxton (GS) algorithm and the phase of addition and subtraction model that can achieve high recognition accuracy and a wide range of OAM modes of compound perfect optical vortex beam under long-distance turbulence environment. At the receiving end, the GS algorithm and phase addition and subtraction are used to compensate and modulate the incident vortex light field to obtain the pre-processed light field, and then the OAM is detected by the coordinate transformation method. The simulation results show that: The detection range of the OAM of the three optical path detection model for the vortex beam transmitting 1000 m reaches −37 to +37 in the vacuum environment, and the mode purity of −37 to +37 can reach more than 0.3 when the turbulence intensity is Cn 2 = 2 × 10−15 m−2/3. The detection range of the OAM of the vortex can be further expanded by increasing the optical path. This study provides a new method for the separation and detection of OAM of composite vortex beams.

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Sorting of spatially incoherent optical vortex modes

Cited by 8 publications

References 34 publications

Ghost Diffraction Holography: A Correlation Assisted Quantitative Tool for Complex Field Imaging and Characterization

Ghost Diffraction Holography: A Correlation Assisted Quantitative Tool for Complex Field Imaging and Characterization

Moldando a luz: a física por trás dos feixes ópticos

Separation and detection of orbital angular momentum states of composite vortex beams in atmospheric turbulence channels

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