Results 11 to 20 of about 514,730 (263)

Partially coherent ultrafast spectrography. [PDF]

Nat Commun, 2015
AbstractModern ultrafast metrology relies on the postulate that the pulse to be measured is fully coherent, that is, that it can be completely described by its spectrum and spectral phase. However, synthesizing fully coherent pulses is not always possible in practice, especially in the domain of emerging ultrashort X-ray sources where temporal ...
Bourassin-Bouchet C, Couprie ME.
europepmc   +5 more sources

Partially coherent sources with circular coherence [PDF]

Optics Letters, 2017
A new class of partially coherent light sources is introduced. At the source plane, they exhibit perfect coherence along any annulus that is concentric to the source center. Between two points at different distances from the center, coherence can be partial or even vanishing.
Santarsiero, Massimo, Martínez Herrero, María Rosario, Maluenda, David, González de Sande, Juan Carlos, Piquero Sanz, Gemma María, Gori, Franco   +5 more
openaire   +3 more sources

Coherent-mode decomposition of partially polarized, partially coherent sources [PDF]

Journal of the Optical Society of America A, 2003
It is shown that any partially polarized, partially coherent source can be expressed in terms of a suitable superposition of transverse coherent modes with orthogonal polarization states. Such modes are determined through the solution of a system of two coupled integral equations. An example, for which the modal decomposition is obtained in closed form
Piquero Sanz, Gemma María, Gori, Franco, Santarsiero, Massimo, Simon, Raja, Borghi, Riccardo, Guattari, Giorgio   +5 more
openaire   +5 more sources

Evolution of Spatiotemporal Intensity of Partially Coherent Pulsed Beams with Spatial Cosine-Gaussian and Temporal Laguerre–Gaussian Correlations in Still, Pure Water

Photonics, 2021
A new family of partially coherent pulsed beams with spatial cosine-Gaussian and temporal Laguerre–Gaussian correlations, named spatial cosine-Gaussian and temporal Laguerre–Gaussian correlated Schell-model (SCTLGSM) pulsed beams, is introduced.
Chaoliang Ding, Olga Korotkova, Dmitri Horoshko, Zhiguo Zhao, Liuzhan Pan   +4 more
doaj   +1 more source

Beam Properties of a Partially Coherent Beam Propagating Horizontally in Atmospheric Turbulence

Photonics, 2023
This study explored the impact of atmospheric turbulence on partially coherent light propagation. Atmospheric turbulence causes random modulation of the intensity and phase of light, resulting in a speckle pattern in the far field.
Zengyan Wu, Zhejun Feng, Shubing Ye, Baoming Song, Runxi Wei, Chaoran Yu   +5 more
doaj   +1 more source

Propagation of Partially Coherent Flat-Topped Vortex Hollow Beams in Anisotropic Turbulent Plasma

International Journal of Optics, 2022
The propagation properties of partially coherent circular flat-topped (FT) vortex hollow/nonvortex beams are studied in anisotropic turbulent plasma. The analytical expression of the optical intensity of these beams is obtained by employing the extended ...
Abdu A. Alkelly, M. A. H. Khaled, Labiba F. Hassan   +2 more
doaj   +1 more source

Propagation Properties of a Twisted Hermite-Gaussian Correlated Schell-Model Beam in Free Space

Frontiers in Physics, 2022
We introduce a novel type of twisted partially coherent beams with a nonconventional correlation function, named the twisted Hermite-Gaussian correlated Schell-model (THGCSM) beam.
Leixin Liu, Haiyun Wang, Lin Liu, Yiming Dong, Fei Wang, Bernhard J. Hoenders, Yahong Chen, Yangjian Cai, Yangjian Cai, Yangjian Cai, Xiaofeng Peng, Xiaofeng Peng   +11 more
doaj   +1 more source

Abnormally autofocusing vortex Swallowtail Gaussian vector beam with low spatial coherence

New Journal of Physics, 2023
The precondition for the application of light beams is the ability to devise light distribution with high precision. Controlling more dimensions for structured light fields is an effective method to improve the ability to devise light distribution.
Jingyi Shi, Zehong Liang, You Wu, Quanfeng Wei, Lingling Shui, Dongmei Deng   +5 more
doaj   +1 more source

Self-steering partially coherent beams. [PDF]

Sci Rep, 2017
AbstractWe introduce a class of shape-invariant partially coherent beams with a moving guiding center which we term self-steering partially coherent beams. The guiding center of each such beam evolves along a straight line trajectory which can be engineered to make any angle with the x-axis.
Chen Y, Ponomarenko SA, Cai Y.
europepmc   +3 more sources

Enhancement of Partially Coherent Diffractive Images Using Generative Adversarial Network

AI, 2022
We present a deep learning-based generative model for the enhancement of partially coherent diffractive images. In lensless coherent diffractive imaging, a highly coherent X-ray illumination is required to image an object at high resolution.
Jong Woo Kim, Marc Messerschmidt, William S. Graves   +2 more
doaj   +1 more source