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Bessel beam
About: Bessel beam is a research topic. Over the lifetime, 1946 publications have been published within this topic receiving 42264 citations.
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TL;DR: In this article, a simple and effective method to generate arrays of various nondiffracting modes using a composite computer-generated hologram, which comprises N × N holograms each generating an individual non-destructive beam, was proposed and validated.
Abstract: Nondiffracting beams have generated great interest recently owing to their potential applications and unique properties. In this paper, we propose and validate a simple and effective method to generate arrays of various nondiffracting modes using a composite computer-generated hologram, which comprises N × N holograms each generating an individual nondiffracting beam. Employing the composite hologram approach, we can modulate individual nondiffracting beam in an array by varying the location, dimension, and phase information coded on each hologram. We experimentally generated regular arrays of Bessel beams, customized-shaped arrays of Bessel beams, and arrays of self-imaged optical bottle beams. The interference among the beams in the arrays was found to be weak within the nondiffracting distance.
38 citations
TL;DR: In this paper, a generalization of type 3 ultrashort pulses (also known as pulse beams or isodiffracting pulses) is introduced, and a model spectral distribution that is zero outside a finite range is investigated.
Abstract: A generalization of type 3 ultrashort pulses (also known as pulse beams or isodiffracting pulses) is introduced. The Bessel beam form of this generalized beam consists of pulses that propagate in free space, without spreading, with a velocity that can be less than that of light. A model spectral distribution that is zero outside a finite range is investigated.
38 citations
TL;DR: A new kind of POV, termed as double-ring POV (DR-POV), whose diameters of the two rings are independent of topological charge is reported, theoretically demonstrating that such a vortex is the Fourier transform of an azimuthally polarized Bessel beam.
Abstract: The perfect optical vortex (POV), the ring size being independent of its topological charge, has found potential applications in optical tweezers and optical communications. In this Letter, we report a new kind of POV, termed as double-ring POV (DR-POV), whose diameters of the two rings are independent of topological charge. We theoretically demonstrate that such a vortex is the Fourier transform of an azimuthally polarized Bessel beam. Experimental results agree well with theoretical prediction. We further investigate the vortex nature of the DR-POV through an interferometric method, showing that the two rings of the vortex have the same topological charge value (magnitude and sign). The specular properties of the DR-POV may find application in optical tweezers, such as trapping and rotating of low-refractive-index particles in the dark region between the two rings.
38 citations
TL;DR: In this paper, Bessel and Bessel-Gaussian beam propagation through an unapertured or apertured misaligned paraxial optical system is investigated, and analytical formulas are derived based on the generalized diffraction integral formula for treating the propagation of a laser beam through a misaligned POMO system in the cylindrical coordinate system.
38 citations
TL;DR: This work reports on a functional experimental design for Bessel beam generation capable of handling high-energy ultrashort pulses (up to 1.2 mJ per pulse of 50 fs duration) and produces void microchannels through glass substrates to demonstrate that aspect ratios exceeding 1200∶1 can be achieved by using single high-intensity pulses.
Abstract: We report on a functional experimental design for Bessel beam generation capable of handling high-energy ultrashort pulses (up to 1.2 mJ per pulse of 50 fs duration). This allows us to deliver intensities exceeding the breakdown threshold for air or any dielectric along controlled micro-filaments with lengths exceeding 4 mm. It represents an unprecedented upscaling in comparison to recent femtosecond Bessel beam micromachining experiments. We produce void microchannels through glass substrates to demonstrate that aspect ratios exceeding 1200∶1 can be achieved by using single high-intensity pulses. This demonstration must lead to new methodologies for deep-drilling and high-speed cutting applications.
38 citations