Effect of optical system and turbulent atmosphere on the average intensity of partially coherent flat-topped vortex hollow beam
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DOI: 10.1016/j.ijleo.2016.08.128
Abstract: Abstract Based on the extended Huygens-Fresnel diffraction integral formula, the average intensity of partially coherent flat-topped vortex hollow beam propagating through the paraxial ABCD optical system in atmosphere turbulence are investigated by using the numerical… read more here.
Keywords: intensity partially; coherent flat; flat topped; average intensity ... See more keywords
Nonparaxial propagation of flat-topped vortex hollow beam in free space
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DOI: 10.1016/j.ijleo.2016.11.076
Abstract: Abstract Starting from the vectorial Rayleigh-Sommerfeld integral formulae, the analytical propagation equations of vectorial flat-topped vortex hollow beam in free space are derived. The far-field and paraxial approximation can be treated as special cases of… read more here.
Keywords: propagation; hollow beam; topped vortex; flat topped ... See more keywords
Analytical study of flat-topped beam characterization using the thermal lens method in sample liquids
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DOI: 10.1016/j.ijleo.2018.04.031
Abstract: Abstract In the present work, the effect of a thermal lens generated by a pump beam on the propagation of a flat-topped probe beam is investigated. The analysis of results shows that the thermal lens… read more here.
Keywords: probe beam; thermal lens; analytical study; flat topped ... See more keywords
Scintillation index of flat-topped beam through non-Kolmogorov turbulence
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DOI: 10.1016/j.ijleo.2019.03.044
Abstract: Abstract The mathematical formula of off-axis scintillation for flat-topped beam through non-Kolmogorov atmospheric turbulence is derived using the generalized non-Kolmogorov spectrum model and the equivalent structure constant based on the Born and Rytov perturbation methods.… read more here.
Keywords: scintillation; turbulence; non kolmogorov; flat topped ... See more keywords
Performance research on flat-topped beam-based small satellites free space optical communication
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DOI: 10.1016/j.optcom.2021.126802
Abstract: Abstract Free space optical communication (FSOC) has shown significant potential in the small satellite’s bandwidth communication link. However, the performance of small satellite FSOC link decays greatly by pointing error. This study presents and simulating… read more here.
Keywords: communication; beam; flat topped; topped beam ... See more keywords
Ultraluminous X-ray sources with flat-topped noise and QPO
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DOI: 10.1093/mnras/stz1027
Abstract: We analysed the X-ray power density spectra of five ultraluminous X-ray sources (ULXs) NGC 5408 X-1, NGC 6946 X-1, M 82 X-1, NGC 1313 X-1, and IC 342 X-1 that are the only ULXs that display both flat-topped noise (FTN) and quasi-periodic oscillations (QPOs). We… read more here.
Keywords: accretion rate; flat topped; ray sources; ray ... See more keywords
Enhanced fiber-coupling efficiency via high-order partially coherent flat-topped beams for free-space optical communications.
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DOI: 10.1364/oe.450737
Abstract: The fiber-coupling efficiency of signal beams is crucial in free space optical (FSO) communications. Herein, we derived an analytical expression for the fiber-coupling efficiency of partially coherent flat-topped beams propagating through atmospheric turbulence based on… read more here.
Keywords: partially coherent; fiber coupling; coherent flat; flat topped ... See more keywords
Mid-infrared flat-topped broadband chiral helix metamaterials based on indium tin oxide and their chiral properties
Sign Up to like & getrecommendations! Published in 2021 at "Chinese Optics Letters"
DOI: 10.3788/col202119.111601
Abstract: We proposed a periodic mid-infrared broadband chiral structure. Its unit cell consists of four indium tin oxide (ITO) helix subunits with different radii. The simulation results show that the flat-topped broadband circular dichroism (CD) can… read more here.
Keywords: indium tin; flat topped; mid infrared; broadband chiral ... See more keywords