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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 paper, the authors studied the effect of acoustooptic diffraction of Bessel light beams (BLB) on the ultrasound waves in optical gyrotropic cubic crystals.
Abstract: The peculiarities have been studied of acoustooptic (AO) diffraction of quasi- nondiffracting vector Bessel light beams (BLB) on the ultrasound waves in optical gyrotropic cubic crystals. The system of coupled equations describing the process of acoustooptic interaction is solved, diffraction efficiency has been calculated. The mathematical description of AO interaction, which differs from the similar description for the plane optical waves means of two types of synchronism, is conducted. It is shown that besides the usual longitudinal synchronism realized at the equality of phase velocities transmitted and diffracted waves, for Bessel beams it is also necessary to perform the so-called transverse synchronism. It is related with the fact, that Bessel beams with differing cone angles have different spatial structure and, consequently, various values of overlap integral with the input beam. The possibility has been investigated of transformation of the order of phase dislocation of Bessel beams wave front due to AO diffraction. It is proposed to use the process of acoustooptic diffraction in gyrotropic cubic crystals as a method for dynamic manipulation of polarization state of output Bessel beam, particularly for transformation of left- to right (and vice versa) polarization states.
3 citations
TL;DR: In this paper, a simple and efficient method to convert a Gaussian laser beam into a nearly non-diverging Bessel-like beam or into a thin-walled hollow beam is described.
Abstract: A simple and efficient method to convert a Gaussian laser beam into a nearly non-diverging Bessel-like beam or into a thin-walled hollow beam is described. The optical system used for the beam conversion consists of a thin liquid-crystal cell and one or two lenses. At certain parameter values, self-focusing of a Gaussian beam directly results in the formation of a narrow Bessel-like beam, and, if an additional lens is used to collimate the self-focused beam, the collimated beam shows an accurate ring-shaped profile.
3 citations
03 Jun 2010
TL;DR: In this article, a SIL-Axicon system with Bessel beam (BB) with SIL can be used for multi-layer high-density data storage systems, and the authors study the tolerance characteristic of SIAX and suggest a newly designed SIL-axisicon system for the better tolerances.
Abstract: We study the tolerance characteristic of SIAX and suggest a newly designed SIL-Axicon system for the better tolerances.
Methods for checking beam quality, optimization and remaining problems are suggested. SIL-Axicon system shows
more tolerances in the uniformity of beam incident angle. Bessel beam (BB) with SIL can be used for multi layer high
density data storage systems. We study the tolerance characteristic of SIAX and suggest a newly designed SIL-Axicon
system for the better tolerances.
3 citations
TL;DR: The axicon-based Bessel-Gauss resonator has the technical advantage that it does not require intracavity optics or special shape of the active medium, and employs conventional mirrors (not complex shaped mirrors) and commercially available axicons.
Abstract: Several active schemes have been proposed to produce finite-aperture approximations of Bessel and Bessel-Gauss beams in resonators [1-5]. Rogel et al [4] and Khilo et al [5] proposed independently a resonator supporting Bessel-Gauss fields based on the fact that an axicon transforms an incident plane wave into a Bessel beam. The axicon-based Bessel-Gauss resonator has the technical advantage that it does not require intracavity optics or special shape of the active medium, and employs conventional mirrors (not complex shaped mirrors) and commercially available axicons. Most of the analysis of the axicon based Bessel-Gauss resonator has centered on applying the Fox and Li method to describe numerically the resonant modes for plane output mirrors.
3 citations
28 Dec 1999
TL;DR: In this paper, a co-axial ring structure has been observed to occur at some threshold power, which consists of two closely spaced ( 1. 5-3. 5 mrad) sharp rings of comparable intensity and a diffuse inner ring of smaller intensity separated by 8-9 mrad.
Abstract: We report on the observation of far field spatial distortions of a Bessel beam after passing through a Kerr liquid. A co-axial ring structure has been observed to occur at some threshold power. It consists of two closely spaced ( 1 . 5-3 . 5 mrad)sharp rings of comparable intensity and a diffuse inner ring of smaller intensity separated by 8-9 mrad. Evolution of the farfield pattern with moving the sample along the propagation path of the Bessel beam shows strong dependence of beam distortions upon the position of the sample. The phenomenon is supposed to be due to nonlinearly induced phase aberrations resulting in the distortion of angular spectrum.Keywords: Bessel beam, beam distortion, nonlinear propagation, optical Kerr effect, nonlinear refraction Introduction About a decade ago Durnin and co-workers"2 proposed the possibility of producing nondiffracting light beams whichhave a transverse intensity distribution proportional to the square of zeroth-order Bessel function of the first kind j0 .
3 citations