Results 41 to 50 of about 60,841 (160)

Generation and Propagation of Partially Coherent Power-Exponent-Phase Vortex Beam

Frontiers in Physics, 2021
We report on a partially coherent power-exponent-phase vortex beam (PC-PEPV), whose spatial coherence is controllable and the initial phase exhibits a periodic power exponential change.
Hao Zhang, Xingyuan Lu, Zhuoyi Wang, A. P. Konijnenberg, Haiyun Wang, Chengliang Zhao, Yangjian Cai, Yangjian Cai, Yangjian Cai   +8 more
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Review on vortex beams with low spatial coherence

Advances in Physics: X, 2019
Vortex beams with helical phase, carrying phase singularity and orbital angular momentum, have attract great attention in the past decades due to their wide applications in optical communications, optical manipulation, super-resolution imaging and so on.
Xianlong Liu, Jun Zeng, Yangjian Cai
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Propagation properties and radiation forces of partially coherent self-shifting cosine-Gaussian beams

Frontiers in Physics, 2022
In the ABCD optical system, the propagation properties and the radiation forces are obtained by studying the cross spectral density of partially coherent self-shifting cosine-Gaussian beams.
Xi Peng, Xi Peng, Shangling He, Yingji He, Dongmei Deng, Daomu Zhao   +5 more
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Topological Charge Measurement of a Partially Coherent Vortex Beam Using Dual Cylindrical Lenses with an Arbitrary Angle

Photonics, 2023
For a partially coherent Laguerre–Gaussian (PCLG) vortex beam, information regarding the topological charge (TC) is concealed in the cross-spectral density (CSD) function phase. Herein, a flexible method for the simultaneous determination of the sign and
Xiaotan Lu, Zhuoyi Wang, Xingyuan Lu, Chengliang Zhao, Yangjian Cai   +4 more
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Partially Coherent Flat-Topped Beam Generated by an Axicon

Applied Sciences, 2019
The intensity distribution of a partially coherent beam with a nonconventional correlation function, named the multi-Gaussian Schell-model (MGSM) beam, focused by an axicon was investigated in detail.
Minghui Zhang, Xianlong Liu, Lina Guo, Lin Liu, Yangjian Cai   +4 more
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Statistical Properties of Partially Coherent Higher-Order Laguerre-Gaussian Power-Exponent Phase Vortex Beams

Photonics, 2023
In this paper, partially coherent radially polarized (RP) Laguerre-Gaussian (LG) rotationally symmetrical power-exponent phase vortex (RSPEPV) beams with the LG-correlated Schell-model (LGSM) were introduced.
Zhiyuan Ma, Yuqi Pan, Jiantai Dou, Jiang Zhao, Bo Li, Youyou Hu   +5 more
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Coherent diffusion of partial spatial coherence

Optica, 2019
Partially coherent light is abundant in many physical systems, and its propagation properties are well understood. Here we extend current theory of propagation of partially coherent light beams to the field of coherent diffusion. Based on a unique four-wave mixing scheme of electro-magnetically induced transparency, an optical speckle pattern is ...
Ronen Chriki, Slava Smartsev, David Eger, Ofer Firstenberg, Nir Davidson   +4 more
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All-optical Fourier neural network using partially coherent light

Chip
Optical neural networks present distinct advantages over traditional electrical counterparts, such as accelerated data processing and reduced energy consumption.
Jianwei Qin, Yanbing Liu, Yan Liu, Xun Liu, Wei Li, Fangwei Ye   +5 more
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Partially-coherent waves with binominal coherence

, 2022
Comprehensive analysis of non-diffracting optical waves with binominal two-point coherence function (BCF) is presented. This coherence function consist of two terms, each depending on either separation of points or central point. We established the necessary and sufficient conditions for non-negative definiteness of the binominal coherence functions ...
openaire   +2 more sources

Propagation of Correlation Singularities of a Partially Coherent Laguerre–Gaussian Electromagnetic Beam in a Uniaxial Crystal

IEEE Photonics Journal, 2017
The correlation singularities of a partially coherent Laguerre–Gaussian (LG) electromagnetic beam in a uniaxial crystal is shown to possess interesting evolution behavior. The analytical formula for the cross-spectral density matrix of a partially
Yongtao Zhang, Liuzhan Pan, Yangjian Cai
doaj   +1 more source