A Bessel beam is a wave whose amplitude is described by a Bessel function of the first kind. [1] [2] [3] Electromagnetic, acoustic, gravitational, and matter waves can all be in the form of Bessel beams. A true Bessel beam is non-diffractive.

Dec 22, 2015 · In this paper, based on the coherent combining technology, we have proposed a method which can be used to generate a high-power Bessel beam. Even more, we give an innovative idea to form vortex...

Abstract Non-Gaussian beam profiles such as Bessel or an-nular beams enable novel approaches to modifying materials through laser-based processing. In this review paper, proper-ties, generation methods and emerging applications for non-conventional beam shapes are discussed, including Bessel, an-nular, and vortex beams.

Sep 5, 2024 · Due to the low cost, ease of use, and high laser damage threshold of glass axicons, as well as their exceptionally high energy utilization efficiency, axicons are the primary choice for generating ultrashort pulse Bessel beams in the field of laser processing.

In the ultrafast laser Bessel beam processing system, the beam generated by a 1064 nm ultrafast laser (Leonis, Beijing Shenglei) is collimated and expanded to a diameter of 8 mm by a beam expander unit. Subsequently, the beam is directed through an energy adjustment unit composed of a half-wave plate and a polarizing beam splitter prism, and ...

Nov 11, 2020 · Bessel functions are precise solutions to the Helmholtz equation [1, 2], i.e., classic Bessel beams (BB) are diffraction free and offer noteworthy features such as an exceptional depth-of-field (DOF), self-recovery, and beam-width relative to the scattering limit.

Jan 17, 2012 · Non-Gaussian beam profiles such as Bessel or annular beams enable novel approaches to modifying materials through laser-based processing. In this review paper, properties, generation methods and emerging applications for non-conventional beam shapes are discussed, including Bessel, annular, and vortex beams.

Sep 6, 2012 · Nondiffracting Bessel beams have been recently applied to single shot ultrafast laser processing of high aspect ratio nanochannels. We review the principles and benefits of nondiffracting Bessel beams for material processing, and we compare experimental results with numerical simulations.

Sep 26, 2021 · To address porosity and defects in metal 3D printing, Lawrence Livermore National Laboratory researchers experimented with exotic optical laser beam shapes known as Bessel beams — reminiscent of bullseye patterns.

May 28, 2024 · Bessel beams, named after the German mathematician Friedrich Bessel, represent a class of solutions to the Helmholtz equation that are distinguished by their unique ability to maintain their intensity profile and shape over a considerable distance, unlike traditional laser beams that spread out.