Engineering an achromatic Bessel beam using a phase-only spatial light modulator and an iterative Fourier transformation algorithm

Walde, Marie; Jost, Aurélie; Wicker, Kai; Heintzmann, Rainer

doi:10.1016/j.optcom.2016.08.050

Cited by 14 publications

(7 citation statements)

References 21 publications

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“…In addition, the transverse intensity profile of the twisted beams exhibits a ringlike pattern with a dark spot (vortex) at the center [20]. In experiments, twisted (Bessel) beams can nowadays be readily produced by means of * anton.peshkov@uni-jena.de spatial light modulators [21] or axicons [22][23][24]. During recent years a number of studies have shown that the OAM and the intensity profile of these twisted beams may affect different fundamental light-matter interaction processes such as the Compton scattering [25][26][27], photoexcitation [28][29][30][31][32][33] and photoionization [34,35] of atoms, the generation of electric currents in quantum rings [36] and molecules [37], electromagnetically induced transparency [38], four-wave mixing in atomic vapors [39].…”

Section: Introductionmentioning

confidence: 99%

Rayleigh scattering of twisted light by hydrogenlike ions

Peshkov¹,

Volotka²,

Surzhykov³

et al. 2018

Phys. Rev. A

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The elastic Rayleigh scattering of twisted light and, in particular, the polarization (transfer) of the scattered photons have been analyzed within the framework of second-order perturbation theory and Dirac's relativistic equation. Special attention was paid hereby to the scattering on three different atomic targets: single atoms, a mesoscopic (small) target, and a macroscopic (large) target, which are all centered with regard to the beam axis. Detailed calculations of the polarization Stokes parameters were performed for C 5+ ions and for twisted Bessel beams. It is shown that the polarization of scattered photons is sensitive to the size of an atomic target and to the helicity, the opening angle, and the projection of the total angular momentum of the incident Bessel beam. These computations indicate more that the Stokes parameters of the (Rayleigh) scattered twisted light may significantly differ from their behaviour for an incident plane-wave radiation.

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Section: Introductionmentioning

confidence: 99%

Rayleigh scattering of twisted light by hydrogenlike ions

Peshkov¹,

Volotka²,

Surzhykov³

et al. 2018

Phys. Rev. A

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“…The non-interferometric phase readout method based on iterative Fourier transform (IFT) algorithm is an iterative single operation method [38][39][40] , which is proposed by R. W. Gerchberg and W. O. Saxton in 1970s and modified by James R. Fienup in 1980s. Until now, the IFT algorithm and its derivative algorithms have large amount of applications such as digital encryption, image resolution enhancement, wavefront shaping and so on [41][42][43][44] . Generally, the reconstruction of relative faithful phase information require hundreds of iterations, which casting a heavy burden on computation time and reducing the data transfer rate eventually.…”

Section: Phase-modulated Chdssmentioning

confidence: 99%

Collinear holographic data storage technologies

Lin¹,

Liu²,

Hao³

et al. 2020

OEA

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In the era of information explosion, the demand of data storage is increased dramatically. Holographic data storage technology is one of the most promising next-generation data storage technologies due to its high storage density, fast data transfer rate, long data life time and less energy consumption. Collinear holographic data storage technology is the typical solution of the holographic data storage technology which owns a more compact, compatible and practical system. This paper gives a brief review of holographic data storage, introduces collinear holographic data storage technology and discusses phase modulation technology being used in the holographic data storage system to achieve higher storage density and higher data transfer rate.

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“…This is of particular importance for applications requiring deep tissue imaging, since high laser powers are needed to reach deep into the samples. Future efforts could adopt a Fourier plane setup, in which iterative Fourier transform algorithms [25] can be implemented to generate the desired annuli. Still, the generated beams using the simple diverting setup were sufficient in investigating the hypothesis experimentally.…”

Section: Imaging Tissue Phantomsmentioning

confidence: 99%

Annular Beam Shaping in Multiphoton Microscopy to Reduce Out-of-Focus Background

Borglin

Wang

Durr

et al. 2017

International Journal of Spectroscopy

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Despite the inherent spatial confinement of multiphoton processes that arises from focusing through an objective, the maximum imaging depth in conventional multiphoton microscopy is ultimately limited by noise from out-of-focus fluorescence. This is particularly evident when imaging beyond shallow depths in highly scattering tissue as increased laser powers are necessary. The out-of-focus signal originates from multiphoton processes taking place primarily at shallow depths and deteriorates contrast and limits imaging depth. In this paper, annular laser beams are explored as a concept to reduce this background signal in multiphoton microscopy. The approach is theoretically verified by data from simulations and proof of principle is demonstrated on a custom-built experimental multiphoton microscopy platform. Annular laser beams were created by adopting wavefront control using a spatial light modulator and implemented for imaging tissue phantoms simulating turbid media and human skin ex vivo. The signal-to-background ratios were calculated and compared to images acquired with a traditional, filled-aperture Gaussian beam. Experiments in tissue phantom show an improvement in signal-to-background ratio of about 30% when using annular beam illumination in comparison to Gaussian illumination at specific depths. When laser power is not the limiting factor, this approach is expected to provide even greater benefits.

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Engineering an achromatic Bessel beam using a phase-only spatial light modulator and an iterative Fourier transformation algorithm

Cited by 14 publications

References 21 publications

Rayleigh scattering of twisted light by hydrogenlike ions

Rayleigh scattering of twisted light by hydrogenlike ions

Collinear holographic data storage technologies

Annular Beam Shaping in Multiphoton Microscopy to Reduce Out-of-Focus Background

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