Compositing orbital angular momentum beams in Bi4Ge3O12 crystal for magnetic field sensing

Yu, Shuangfeng; Pang, Fufei; Li, Xianjin; Yang, Junfeng; Wang, Tingyun

doi:10.1063/1.4989651

Cited by 35 publications

(4 citation statements)

References 33 publications

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“…After including the polarization to the spatial mode of light beam, we get the vector vortices which have been studied extensively for sensing and communication applications [40,41]. For sensing the magnetic field, these beams will pass through the materials that have magnetic field-dependent properties [42].…”

Section: Introductionmentioning

confidence: 99%

Correlations in Scattered Phase Singular Beams

Vanitha¹,

Salla²,

Singh³

2023

Holography - Recent Advances and Applications

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We discuss about the correlations present in the scattered phase singular beams and utilize them for obtaining the corresponding mode information. We experimentally generate the coherence vortices using the cross-correlation functions between the speckle patterns and validate them with the exact analytical expressions. We also explore their propagation characteristics by considering their geometry along with their divergence. We utilize the autocorrelation measurements of speckle patterns for obtaining the mode information. Further, we study the correlations present in scattered perfect optical vortices which lead to a new class of coherence functions, Bessel-Gauss coherence functions, and utilized for generating the non-diffracting random fields, i.e. propagation invariant fields. We utilized these correlation functions, which are order-dependent although the speckle patterns are order-independent, for encrypting the information which has higher advantage than normal random optical fields.

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Section: Introductionmentioning

confidence: 99%

Correlations in Scattered Phase Singular Beams

Vanitha¹,

Salla²,

Singh³

2023

Holography - Recent Advances and Applications

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“…The petallike pattern formed by the interference of two conjugated OAM beams is particularly intriguing to researchers. S. Yu et al realized a high-precision magnetic field intensity measurement with superposition OAM beams combined with the Faraday effect 7 . J. Zhu et al proposed a method for detecting the dynamic micro-displacement and direction of a moving object by using a petal-like interference pattern 8 .…”

Section: Introductionmentioning

confidence: 99%

Refractive index variation rate measurement method based on OAM interferometry and time-frequency analysis

Wang

2023

SPIE-CLP Conference on Advanced Photonics 2022

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A scheme for measuring a small variation rate of the refractive index (RI) based on orbital angular momentum (OAM) interferometry and time-frequency analysis is proposed and demonstrated in this paper. Two vortex beams carrying OAM of opposite signs are used for interference to produce a petal-like intensity distribution. The variation in RI of the sample leads to a time variable phase delay between the reference and measurement paths, and causes the rotation of the petal-like spots. The rotation angular velocity of the petal-like spots is proportional to the RI variation rate, the normalized cross correlation method is used to estimate it. Then, a time-frequency analysis method is employed to study the time evolution of the variation rate of RI. Three kinds of RI models with different variation rates are simulated and the results are consistent with expectations. The proposed measurement method is simple in structure, and extends a new approach to detect other physical coefficients of RI or the tiny velocity.

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“…Область применения оптических вихрей включает оптические коммуникации [33 -34], обработку материалов [35], ориентацию молекул [36], оптический захват и микроманипулирование [37 -38], сенсорику магнитных полей [39] и т.д. В связи с этим исследования процессов их формирования и распространения являются очень актуальными.…”

Section: Introductionunclassified

Comparison of the shape of focal spots in terms of intensity and energy flux for a high-aperture zone plate and a spiral zone plate

Savelyeva

Козлова

2022

Computer Optics

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Using a finite-difference time-domain method, it has been shown that focal spots generated when tightly focusing a linearly polarized Gaussian beam by a Fresnel zone plate (FZP) and when focusing a Gaussian beam with an embedded optical vortex by a spiral zone plate (SZP) have different patterns of the intensity and energy flux. The most significant differences are observed when the value of the topological charge (TC) is equal to three. The energy flux has an annular distribution when the Gaussian beam is focused by the FZP, while the SZP produces a field whose patterns of intensity and energy flux have three local maxima. The number of local maxima corresponds to the order of the SZP. At a certain distance from the focus, the petal structure of the intensity (and energy flux) changes to a ring distribution.

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Compositing orbital angular momentum beams in Bi4Ge3O12 crystal for magnetic field sensing

Cited by 35 publications

References 33 publications

Correlations in Scattered Phase Singular Beams

Correlations in Scattered Phase Singular Beams

Refractive index variation rate measurement method based on OAM interferometry and time-frequency analysis

Comparison of the shape of focal spots in terms of intensity and energy flux for a high-aperture zone plate and a spiral zone plate

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