Results 241 to 250 of about 2,047,243 (297)

Evolution of singularities in a partially coherent vortex beam

Journal of the Optical Society of America A, 2009
We study the evolution of phase singularities and coherence singularities in a Laguerre-Gauss beam that is rendered partially coherent by letting it pass through a spatial light modulator. The original beam has an on-axis minumum of intensity--a phase singularity--that transforms into a maximum of the far-field intensity.
van Dijk, T., Visser, T.D.
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Partially coherent Pearcey–Gauss beams

Optics Letters, 2020
We investigate the dynamics of partially coherent Pearcey–Gauss beams propagating in free space, theoretically and experimentally. They are produced by introducing the degree of coherence (DOC) function with Gaussian Schell-model correlation into the light source in the frequency domain.
Xiaoyan Zhou, Zihao Pang, Daomu Zhao
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Partially coherent Ince–Gaussian beams

Optics Letters, 2020
We report on the study and generation of Ince–Gaussian beams in the spatially partially coherent regime. The inherent random fluctuations both in time and space of these partially coherent fields make their characterization difficult. Our results show that the cross-correlation function (CCF) provides insight into the composition of the Ince–Gaussian ...
Adad Yepiz, Benjamin Perez-Garcia, Raul I. Hernandez-Aranda   +2 more
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Partially coherent nonparaxial beams

Optics Letters, 2004
The concept of a partially coherent nonparaxial beam is proposed. A closed-form expression for the propagation of nonparaxial Gaussian Schell model (GSM) beams in free space is derived and applied to study the propagation properties of nonparaxial GSM beams.
Kailiang, Duan, Baida, Lü
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Partially coherent conical beams

Optics Letters, 2000
We introduce a new class of partially coherent beams that can propagate over large distances without changing their transverse profiles and their coherence properties. Such beams are generated by an incoherent superposition of identical fully coherent beams of arbitrary form, whose axes lie on a cone.
A V, Shchegrov, E, Wolf
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Coherent and partially coherent twisting beams

Optical Review, 1994
We 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, Vittorio Bagini, Massimo Santarsiero, FREZZA, Fabrizio, Giuseppe Schettini, G. Schirripa Spagnolo   +5 more
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Coherence vortices in partially coherent beams

Optics Communications, 2003
It is demonstrated that the spectral degree of coherence of a partially coherent beam may possess isolated pairs of points at which its phase is singular, and that in the neighborhood of these points the phase may possess a vortex structure. Partially coherent beams consisting of Hermite-Gaussian modes are considered as an example.
Gbur, G.J., Visser, T.D.
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Partially coherent vectorial nonparaxial beams

Journal of the Optical Society of America A, 2004
Generalized 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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