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Accurate modelling of intrabeam scattering and its impact on photoinjectors for free-electron lasers. [PDF]

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Lucas TG, Craievich P, Prat E, Reiche S, Gjonaj E.   +4 more
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Symmetric Pearcey Gaussian beams

Optics Letters, 2021
In this Letter, a new, to the best of our knowledge, type of autofocusing and symmetric beam arisen from two quartic spectral phases is introduced in theory and experiment. The symmetric Pearcey Gaussian beam (SPGB), formed with a Gaussian term and two multiplying Pearcey integrals, processes a focusing intensity approximately 1.32 times stronger than ...
You Wu, Jiajia Zhao, Zejia Lin, Haiqi Huang, Chuangjie Xu, Yujun Liu, Kaihui Chen, Xinming Fu, Huixin Qiu, Hongzhan Liu, Guanghui Wang, Xiangbo Yang, Dongmei Deng, Lingling Shui   +13 more
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Decentered Gaussian beams

Applied Optics, 1995
A generalization of the Gaussian beam is obtained by introducing a complex-valued shift in the transverse dimension. The resulting beam has a Gaussian intensity distribution with width varying as an ordinary Gaussian beam, but whose peak traces an inclined linear trajectory. The wave fronts are displaced laterally in a sheared fashion. This generalized
A A, Al-Rashed, B E, Saleh
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Ince–Gaussian beams

Optics Letters, 2004
We demonstrate the existence of the Ince-Gaussian beams that constitute the third complete family of exact and orthogonal solutions of the paraxial wave equation. Their transverse structure is described by the Ince polynomials and has an inherent elliptical symmetry.
Miguel A, Bandres, Julio C, Gutiérrez-Vega   +1 more
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Nonparaxial Gaussian beams

Applied Optics, 1990
When the waist size of a Gaussian beam becomes of the order of the wavelength of light, the beam does not satisfy the paraxial condition in which it is derived. In this paper, we define the lower bound to the waist size by showing that a Gaussian beam whose waist size is larger than this bound safely satisfies the paraxial condition.
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Elliptic Laguerre-Gaussian beams

Journal of the Optical Society of America A, 2006
An analytical expression for the diffraction of an elliptic Laguerre-Gaussian (LG) beam is derived and analyzed. We show that a beam with even singularity order has nonzero axial intensity for any degree of ellipticity and at any finite distance z from the initial plane, whereas at z = 0 and z = infinity the axial intensity is zero.
Victor V, Kotlyar, Svetlana N, Khonina, Anton A, Almazov, Victor A, Soifer, Konstantins, Jefimovs, Jari, Turunen   +5 more
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Alignment of Gaussian beams

Applied Optics, 1984
The design of a coupling between a semiconductor laser and a single-mode fiber, or between any two optical or acoustical elements that support Gaussian modes, is presented as a trade-off among coupling efficiency T(a), offset misalignment tolerance d(e), and angular misalignment tolerance theta(e).
W B, Joyce, B C, DeLoach
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Decentered elliptical Gaussian beam

Applied Optics, 2002
A new kind of laser beam, called a decentered elliptical Gaussian beam (DEGB), is defined by a tensor method. The propagation formula for a DEGB passing through an axially nonsymmetrical paraxial optical system is derived through vector integration.
Yangjian, Cai, Qiang, Lin
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Beam profile flattener for Gaussian beams

Optics Letters, 1993
We describe a novel technique to make a Gaussian laser beam profile spatially flat. We exploit the angular dependence of the transmission of an étalon to tailor the spatial profile to the desired form. A simple analysis shows why our method works so well and how an étalon could be tuned to give the optimum results at all wavelengths. This technique has
C, Xie, R, Gupta, H, Metcalf
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