Results 11 to 20 of about 112,176 (189)
Subpixel localization of optical vortices using artificial neural networks [PDF]
Metrology and Measurement Systems, 2021 Optical vortices are getting attention in modern optical metrology. Because of their unique features, they can be used as precise position markers. In this paper, we show that an artificial neural network can be used to improve vortex localization.
Agnieszka Popiołek-Masajada +2 more
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Entangled Optical Vortex Links [PDF]
Physical Review Letters, 2011 Optical vortices are lines of phase singularity which percolate through all optical fields. We report the entanglement of linked optical vortex loops in the light produced by spontaneous parametric down-conversion. As measured by using a Bell inequality, this entanglement between topological features extends over macroscopic and finite volumes.
Romero, J. +6 more
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Optical Vortex Brillouin Laser
Laser & Photonics Reviews, 2023 AbstractOptical vortices, which have been extensively studied over the last decades, offer an additional degree of freedom useful in many applications, such as optical tweezers and quantum control. Stimulated Brillouin scattering (SBS), providing a narrow linewidth and a strong nonlinear response, has been used to realize quasi‐continuous wave lasers ...
Zeng, X. +7 more
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Nanomaterials, 2022 The optical vortex (OV) beams characterized by orbital angular momentum (OAM) possess ubiquitous applications in optical communication and nanoparticle manipulation.
Yue Liu +8 more
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Real-time phase measurement of optical vortex via digital holography
Frontiers in Physics, 2023 Real-time phase measurement is of great value to study the evolution of optical vortex. However, it cannot be recorded in real time due to the limitation of the exposure time of the recording device in the experiment. Therefore, based on the temporal and
Huaibin Qiu +5 more
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Abrupt autofocusing performance of a circular Airyprime beam with vortex pairs
Results in Physics, 2023 Abrupt autofocusing performance of a circular Airyprime beam (CAPB) with vortex pairs propagating in free space is investigated. Here the vortex pairs are off-axis by default.
Wen-Song Dan +6 more
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Photonics, 2022 Using the two-dimensional nonlinear Schrödinger equation, the collapse dynamics of vortex beams in a Kerr medium with refractive index modulation and parity–time (PT) symmetric lattices are explored. The critical power for the collapse of vortex beams in
Gang Yao, Yuhua Li, Rui-Pin Chen
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Observation of Vortex Pinning in Bose-Einstein Condensates [PDF]
, 2006 We report the observation of vortex pinning in rotating gaseous Bose-Einstein condensates (BEC). The vortices are pinned to columnar pinning sites created by a co-rotating optical lattice superimposed on the rotating BEC.
Daniel E. Sheehy +4 more
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Nonlinear optical vortex coronagraph
Optics Letters, 2020 A nonlinear optical vortex coronagraph (n-OVC) based on sum-frequency generation (SFG) in a periodically poled lithium niobate (PPLN) crystal is presented. We demonstrate an n-OVC by mixing the image of an on-axis point source ( λ s = 1.6 µ m ) inside the PPLN crystal with a pump beam (
Einstom Engay, Peter John Rodrigo
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Vortex Beam in a Turbulent Kerr Medium for Atmospheric Communication
Photonics, 2023 The dynamics of the topological charge of a vortex optical beam propagating in turbulent air while accounting for the cubic nonlinearity is theoretically considered.
Andrey D. Bulygin +2 more
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