Self-reconstruction of a distorted nondiffracting beam

Bouchal, Zdeněk; Wagner, Jaroslav; Chlup, M

doi:10.1016/s0030-4018(98)00085-6

Cited by 475 publications

(272 citation statements)

References 14 publications

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“…Applications could be found in the area of free-space quantum communications, where the ability of an NDB to maintain its form despite the presence of obstacles [13] and/or despite propagation through a turbulent medium [14,15]. would be particularly useful.…”

Section: Introductionmentioning

confidence: 99%

Observation of non-diffracting behavior at the single-photon level

et al. 2012

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Abstract:We demonstrate the generation of non-diffracting heralded single photons, i.e. which are characterized by a single-photon transverse intensity distribution which remains essentially unchanged over a significant propagation distance. For this purpose we have relied on the process of spontaneous parametric downconversion (SPDC) for the generation of signal and idler photon pairs, where our SPDC crystal is pumped by a Bessel-Gauss (BG) beam. Our experiment shows that the well-understood non-diffracting behavior of a BG beam may be directly mapped to the signal-mode, single photons heralded by the detection of a single idler photon. In our experiment, the heralded single photon is thus arranged to be non-diffracting without the need for projecting its single-photon transverse amplitude, post-generation, in any manner.

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Section: Introductionmentioning

confidence: 99%

Observation of non-diffracting behavior at the single-photon level

et al. 2012

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“…The interest in Bessel light beams is connected, first of all, with the nondiffracting nature of these beams and with the effect of self-reconstruction of the transverse profile after shadowing (see, for example, [12]). These properties are the advantage of Bessel beams as compared with traditional Gaussian ones.…”

Section: Introductionmentioning

confidence: 99%

Bessel–like beams with z–dependent cone angles

et al. 2010

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ABSRACTA new type of Bessel-like optical beams, which is distinguished by the dependence on the cone angle from the longitudinal coordinate, is investigated. Such beams have the properties of Bessel beams (ring-spatial spatial spectrum) as well as Gaussian beams (keeping the transverse profile at any distances). This new type of beams can be obtained in optical system composed of lens axicon doublet and conical lens. An experimental set-up for producing such beams is realized. It is shown that depending on its parameters the scheme allows one to produce z-dependent Bessel-like beams, whose spatial spectra change from Bessel function to shifted Gaussian one. It is establish theoretically and confirmed experimentally that on-axial intensity of z-dependent Bessel-like beam could be higher than that of incident Gaussian beam.

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“…CL-MISERB increases contrast especially at the positions marked by the arrows. This effect cannot be simply explained by the illumination geometry of Bessel beams behind an obstruction 17 . Although scattered to a large fraction by the first egg chamber to a large fraction, the Bessel beam self-reconstructs by constructive interference without significant intensity drop-off along the predicted z lines, which are selected by the confocal-line detection principle to compose the image in Figure 6d.…”

Section: Signal-to-background Ratiomentioning

confidence: 97%

Propagation stability of self-reconstructing Bessel beams enables contrast-enhanced imaging in thick media

2012

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Laser beams that can self-reconstruct their initial beam profile even in the presence of massive phase perturbations are able to propagate deeper into inhomogeneous media. This ability has crucial advantages for light sheet-based microscopy in thick media, such as cell clusters, embryos, skin or brain tissue or plants, as well as scattering synthetic materials. A ring system around the central intensity maximum of a Bessel beam enables its self-reconstruction, but at the same time illuminates out-of-focus regions and deteriorates image contrast. Here we present a detection method that minimizes the negative effect of the ring system. The beam's propagation stability along one straight line enables the use of a confocal line principle, resulting in a significant increase in image contrast. The axial resolution could be improved by nearly 100% relative to the standard light-sheet techniques using scanned Gaussian beams, while demonstrating self-reconstruction also for high propagation depths.

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Self-reconstruction of a distorted nondiffracting beam

Cited by 475 publications

References 14 publications

Observation of non-diffracting behavior at the single-photon level

Observation of non-diffracting behavior at the single-photon level

Bessel–like beams with z–dependent cone angles

Propagation stability of self-reconstructing Bessel beams enables contrast-enhanced imaging in thick media

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