Results 291 to 300 of about 72,451 (334)

Generation of Partially Coherent Beams

2017
Abstract Partially coherent beams with a prescribed phase, state of polarization, and degree of coherence display many extraordinary propagation properties and are preferred in many applications, such as particle trapping, free-space optical communications, remote sensing, optical imaging, material thermal processing, image transformation, and ...
Yangjian Cai, Yahong Chen, Jiayi Yu, Xianlong Liu, Lin Liu   +4 more
openaire   +1 more source

Effect of dispersion on the spectrum of partially coherent beams

Journal of the Optical Society of America A, 2008
Taking the Gaussian Schell-model (GSM) beam as a typical example of partially coherent beams, the analytical expressions of the spectrum of GSM beams propagating in dispersive media are derived, and the spectral properties are studied in detail. It is shown that, in comparison with propagation in free space and in turbulence, whether or not GSM beams ...
Liuzhan, Pan, Xiao, Yuan, Chaoliang, Ding, Baida, Lü   +3 more
openaire   +2 more sources

Focus shaping of partially coherent radially polarized vortex beam with tunable topological charge.

Optics Express, 2019
In this paper, we have introduced a new class of partially coherent vector vortex beams, named radially polarized multi-Gaussian Schell-model (MGSM) vortex beam, carrying the vortex phase with tunable topological charges (i.e., both integral and ...
Hua-Feng Xu, R. Zhang, Z. Sheng, Jun Qu
semanticscholar   +1 more source

Synthesis of structured partially spatially coherent beams

Optics Letters, 2011
We report on the generation and rapid characterization of structured beams of arbitrary spatial coherence. An experimental setup is introduced capable of generating partially coherent fields by incoherently superposing fully coherent fields. The characterization is performed using the spectral information in the interferogram produced when using a two ...
C, Macías-Romero, R, Lim, M R, Foreman, P, Török   +3 more
openaire   +2 more sources

Properties of multi-Gaussian correlated partially coherent anomalous hollow beam propagating in underwater oceanic turbulence

Optics and Laser Technology, 2019
The model of partially coherent anomalous hollow beam (AHB) generated by multi-Gaussian Schell-model source has first been introduced, and then the evolution properties of multi-Gaussian correlated partially coherent AHB propagating in underwater oceanic
Dajun Liu, Yaochuan Wang, H. Zhong, Guiqiu Wang, Hongming Yin, A. Dong   +5 more
semanticscholar   +1 more source

Intensity properties of partially coherent beam waves

Applied Optics, 1980
The extended Huygens-Fresnel principle is used to investigate the lateral coherence and the average on-axis intensity of partially coherent beam waves propagating in the turbulent atmosphere. A factor that determines the shift of the focal point toward the source when a beam wave propagates in turbulence is calculated.
M A, Plonus, C F, Ouyang, S C, Wang
openaire   +2 more sources

Partially coherent dual and quad airy beams

Optics Letters, 2019
We investigate the partially coherent dual and quad Airy beams, which are the partially coherent version of multiple Airy beams, in the framework of cross-spectral density functions. They are constructed by the superposition of two and four partially coherent Airy beams without reduced acceleration properties (rate and range).
Zihao, Pang, Daomu, Zhao
openaire   +2 more sources

Second-harmonic generation by a partially coherent beam

Physical Review A, 1987
The effect of degradation of the coherence of the pump beam by a random phase screen on the conversion efficiency in the second-harmonic generation process is considered. It is shown that, under suitable conditions, the conversion efficiency can be increased significantly.
, Zubairy, , McIver
openaire   +2 more sources

Off-axis average transmittance and beam spread of a partially coherent flat-topped beam in a turbulent underwater medium.

Journal of The Optical Society of America A-optics Image Science and Vision, 2019
The effects of oceanic turbulence on the off-axis optical transmittance and beam spread are examined when a partially coherent flat-topped beam wave propagates in an underwater medium.
Aysan Keskin, Y. Baykal
semanticscholar   +1 more source

Partially coherent vortex beams with a separable phase

Optics Letters, 2003
We propose and experimentally implement a method for the generation of a wide class of partially spatially coherent vortex beams whose cross-spectral density has a separable functional form in polar coordinates. We study phase singularities of the spectral degree of coherence of the new beams.
Galina V, Bogatyryova, Christina V, Fel'de, Peter V, Polyanskii, Sergey A, Ponomarenko, Marat S, Soskin, Emil, Wolf   +5 more
openaire   +3 more sources