Results 271 to 280 of about 72,451 (334)
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Coherent and partially coherent twisting beams
Optical Review, 1994We present coherent and partially coherent beams that exhibit transverse pattern expansion and rotation upon free propagation. Coherent twisting beams may be generated by a suitable superposition of Laguerre-Gauss modes, while a model for partially coherent twisting beams is given by a continuous incoherent superposition of lowest order modes.
Franco Gori +5 more
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Optics Communications, 2019
We investigate detailedly evolution properties of the angular spread and propagation factor ( M 2 -factor) of a general-type partially coherent beam with Schell-model correlator in anisotropic oceanic turbulence. According to the extended Huygens–Fresnel
Wenyu Fu, X. Zheng
semanticscholar +1 more source
We investigate detailedly evolution properties of the angular spread and propagation factor ( M 2 -factor) of a general-type partially coherent beam with Schell-model correlator in anisotropic oceanic turbulence. According to the extended Huygens–Fresnel
Wenyu Fu, X. Zheng
semanticscholar +1 more source
Applied Optics, 2019
In this paper, we analyze the scintillation index of a partially coherent beam propagating through weak oceanic turbulence, taking into account the pointing errors attributed to the slightly skewed underwater platform.
Zongmin Cui, Peng Yue, Xiang Yi, Jing Li
semanticscholar +1 more source
In this paper, we analyze the scintillation index of a partially coherent beam propagating through weak oceanic turbulence, taking into account the pointing errors attributed to the slightly skewed underwater platform.
Zongmin Cui, Peng Yue, Xiang Yi, Jing Li
semanticscholar +1 more source
Modulating the statistical properties of a vector partially coherent beam by a 4f optical system
Journal of Quantitative Spectroscopy and Radiative Transfer, 2019A 4f optical system is applied to modulate the statistical properties of a vector partially coherent beam. We find that the intensity distribution and the degree of coherence of an incident radially polarized Gaussian Schell-model (RPGSM) beam can be ...
Chenkun Mi +6 more
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Partially coherent vectorial nonparaxial beams
Journal of the Optical Society of America A, 2004Generalized vectorial Rayleigh-Sommerfeld diffraction integrals are developed for the cross-spectral-density matrices of spatially partially coherent beams. Using the Gaussian Schell-model (GSM) beam as an example, we derive the expressions for the propagation of cross-spectral-density matrices and intensity of partially coherent vectorial nonparaxial ...
Kailiang, Duan, Baida, Lü
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Partially coherent bottle beams
Optics Communications, 2005We theoretically investigate the three-dimensional intensity distribution of the partially coherent beams focused by a lens. It is shown that the intensity distribution in the neighborhood of the geometrical focus is not only dependent on the intensity distribution of the incident partially coherent beam, but also on its coherence.
Jixiong Pu, Xiaoyun Liu, Shojiro Nemoto
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Waves in Random and Complex Media, 2020
This paper introduces the propagation properties and polarization characteristics of radially polarized partially coherent vortex beams in anisotropic plasma turbulence and discusses in detail the distribution of light intensity in such beams as a ...
Jiang-ting Li +4 more
semanticscholar +1 more source
This paper introduces the propagation properties and polarization characteristics of radially polarized partially coherent vortex beams in anisotropic plasma turbulence and discusses in detail the distribution of light intensity in such beams as a ...
Jiang-ting Li +4 more
semanticscholar +1 more source
Beam shaping of focused partially coherent beams by use of the spatial coherence effect
Applied Optics, 2004We demonstrate that when a partially coherent beam with a Gaussian intensity distribution is focused by a lens, the desired partially coherent flat-topped intensity distribution or doughnut-shaped intensity distribution at the geometrical focus can be generated by choice of appropriate form of spectral degree of coherence.
Jixiong, Pu +2 more
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Partially coherent beam propagation
SPIE Proceedings, 2003We investigate the propagation of a partially coherent beam produce by a plane source. By utilizing Helmholtz equation, the intensity of the source in plane z = 0, and plane z are obtained. Then by considering new theoretical prediction on cross-spectral density function of the field in the plane z = 0, the root-means square (rms) beam radius, as a ...
H. Tajalli, M. Sahrai
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Beam shaping of partially coherent light beams
Frontiers in Optics, 2003Laser beams with a uniform profile or other kinds of profiles are desired in many applications, such as in laser fusion, laser heat treatment, and optical data proceeding etc.. Unfortunately a laser operated in TEM00 mode delivers a laser beams with a Gaussian profile. Therefore it is very important to reshape a laser beam with a profile to the desired
Jixiong Pu, Shojiro Nemoto
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