DSpace
 

Researchspace >
General science, engineering & technology >
General science, engineering & technology >
General science, engineering & technology >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/5278

Title: Higher-order Bessel like beams with z-dependent cone angles
Authors: Ismail, Y
Barnes, G
Mhlanga, T
Belyi, V
Forbes, A
Keywords: Higher-order Bessel beam
Laguerre Gaussian beams
Axicon
Bessel beam
Laser beam shaping
Photo optical instrumentation engineering
Issue Date: Aug-2010
Publisher: SPIE
Citation: Ismail, Y, Barnes, G, Mhlanga, T et al. 2010. Higher-order Bessel like beams with z-dependent cone angles. Laser Beam Shaping XI, Proceedings of the Society of Photo-Optical Instrumentation Engineers (SPIE), San Diego, USA, 1-5 August 2010
Series/Report no.: Workflow request;5311
Abstract: As in the case of zero-order Bessel beam being produced by illuminating an axicon with a Gaussian beam, higher-order Bessel beams are generated by substituting the Gaussian beam with a Laguerre Gaussian (LG) beam. These beams hold similar properties to zero-order Bessel beams except they carry orbital angular momentum (OAM). They also undergo an abrupt spatial transformation at the boundary of their non-diffracting regime whereby the near-field intensity distribution is a Bessel function which transforms into an annular ring (far-field profile). This can be considered a disadvantage to such beams in comparison to a Gaussian beam that is propagation invariant. By using a double axicon lens system this Bessel beams with z-dependent cone angles can be produced however at the expense of its non-diffracting nature. Here we outline an optical design to produce higher-order Bessel-like beams with z-dependent cone angles that will retains its spatial distribution as z 8.
Description: Laser Beam Shaping XI, Proceedings of the Society of Photo-Optical Instrumentation Engineers (SPIE), San Diego, USA, 1-5 August 2010
URI: http://hdl.handle.net/10204/5278
Appears in Collections:Laser physics and technology
General science, engineering & technology

Files in This Item:

File Description SizeFormat
Ismail1_2010.pdf880.85 kBAdobe PDFView/Open
View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback