Field description and electron acceleration of focused flattened Gaussian laser beams

Wang, Wei; Wang, P. X.; Ho, Y. K.; Kong, Q.; Chen, Z.; Gu, Yuming; Wang, S. J.

doi:10.1209/epl/i2005-10387-4

Cited by 22 publications

(4 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared with the complete coherent light and conventional partially coherent light illumination, a MGSM beam illumination has the advantage not only in the prescribed spatial intensity profile, but also in the convenient control of the focal shift and focal depth. Our results will be useful for electron acceleration [40], particle trapping [41], fiber coupling and percussion drilling [42], where a partially coherent flat-topped beam spot is required.…”

Section: Discussionmentioning

confidence: 93%

Partially Coherent Flat-Topped Beam Generated by an Axicon

et al. 2019

View full text Add to dashboard Cite

The intensity distribution of a partially coherent beam with a nonconventional correlation function, named the multi-Gaussian Schell-model (MGSM) beam, focused by an axicon was investigated in detail. Our numerical results showed that an optical needle with a flat-topped spatial profile and long focal depth was formed and that we can modulate the focal shift and focal depth of the optical needle by varying the width of the degree of coherence (DOC) and the parameters of the correlation function. The adjustable optical needle can be applied for electron acceleration, particle trapping, fiber coupling and percussion drilling.

show abstract

Section: Discussionmentioning

confidence: 93%

Partially Coherent Flat-Topped Beam Generated by an Axicon

et al. 2019

View full text Add to dashboard Cite

show abstract

“…However, some of them are not the eigensolutions of paraxial wave equation in free space [25] and some descriptions are quite different from the actual beam propagation properties [24]. Similar to [29], we enact the vector potential ⃗ A(A x , A y = 0, A z = 0) of a FGB instead of the electric field as [23]. Using the Lorentz gauge, we can get the scalar potential Φ and the corresponding electromagnetic components of the FGB.…”

Section: Fgb Accelerationmentioning

confidence: 99%

Neutral particle acceleration by spatially modulated laser pulses

Yan

Wang

et al. 2023

New J. Phys.

Self Cite

View full text Add to dashboard Cite

The velocity gain of neutral particles (atoms, molecules, etc.) from laser acceleration is always small. A possible scheme to obtain a high speed neutral particle beam is multistage acceleration. However, according to previous theoretical and experimental studies, generally, lateral acceleration is larger than longitudinal acceleration. These transverse velocities destroy the expected quality of the longitudinally transmitted neutral particle beam. In order to realize multistage accelerations of neutral particle, it is necessary to restrain the beam divergence caused by lateral acceleration. How to optimize and utilize these laterally accelerated neutral particles is worthy of in-depth study. In this paper, we use a multi-mode combined laser pulse and a flattened Gaussian laser pulse to accelerate the neutral atoms. The transverse divergence of the beam is well controlled while the longitudinal acceleration is retained, which provides the possibility for improving the beam quality of neutral particles as well as the corresponding multistage acceleration.

show abstract

“…In the past decades, flat-topped (FT) beams with a nearly uniform irradiance have found many important applications such as inertial confinement fusion (ICF), optical communication, electron acceleration, material thermal processing and optical tapping [1][2][3][4][5][6][7][8]. Several models have been proposed to describe the FT beams such as the flatted Gaussian beam (FGB), FT multi-Gaussian beam and the FT beam [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental studies of the spectral changes of a focused polychromatic partially coherent flat-topped beam

Zhu

2015

Appl. Phys. B

View full text Add to dashboard Cite

in theory and in experiment [12][13][14][15][16][17][18]. Borghi and Santarsiero [12] analyzed the model decomposition of the partially coherent FT beam produced by stable resonators. Zhang et al. [16] investigated the spectrum properties of a partially coherent FT beam in dispersive and gain media and found that the spectral shift was affected by the refractive index of dispersive media. Baykal and Eyyuboğlu [17] studied the scintillations index for a FT Gaussian beam in a free-space optics (FSO) link. Wang and Cai [18] reported the experimental generation and measurement of a partially coherent FT beam. Recently, partially coherent FT beams propagating through turbulent atmosphere have attracted much attention [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]. It has been found that a partially coherent FT beam has an advantage over a Gaussian Schellmodel (GSM) beam, a coherent FT beam and a Gaussian beam for overcoming the turbulence-induced degradation.It is reported by Wolf that the spectrum of partially coherent polychromatic light changes on propagation due to the spatial coherence properties of the source [35][36][37]. Since then, numerous efforts have been paid to the spectral changes of partially coherent beam both theoretically and experimentally [38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53]. It is demonstrated that spectral shift has important applications in determining the angular diameter of the stars, determining the angular separation of a double star, spectroradiometry, determining the intensity distribution across a distant source, optical signal processing and solving the inverse problems of scattering, information encoding and exchange. Recently, spectral changes of light beams propagating through optical system, human tissue and turbulent atmosphere have been extensively investigated [54][55][56][57][58][59][60][61][62]. To our knowledge, the generation and investigation of the spectral changes of polychromatic partially coherent FT beams have not been reported. In this paper, we theoretically present the spectral changes of a polychromatic partially coherent FT beam and carry out experiment Abstract An analytical propagation formula for a focused polychromatic partially coherent flat-topped beam with circular symmetry is derived in a tensor form that is based on the alternative flat-top beams model proposed by Li (Opt Lett 27:1007, 2002. The dependence of the relative spectral shift on the flat-top order N is investigated numerically in detail. It is shown that the on-axis maximum relative spectral shift occurs at the back focal plane, while the no spectral shift observes at the image plane. Furthermore, we report the experimental generation of a polychromatic partially coherent FT beam. The on-axis and off-axis spectral measurement verifies the theoretical study.

show abstract

Field description and electron acceleration of focused flattened Gaussian laser beams

Cited by 22 publications

References 21 publications

Partially Coherent Flat-Topped Beam Generated by an Axicon

Partially Coherent Flat-Topped Beam Generated by an Axicon

Neutral particle acceleration by spatially modulated laser pulses

Theoretical and experimental studies of the spectral changes of a focused polychromatic partially coherent flat-topped beam

Contact Info

Product

Resources

About