Ismail, YBarnes, GMhlanga, TBelyi, VForbes, A2011-11-092011-11-092010-08Ismail, 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 2010http://hdl.handle.net/10204/5278Laser Beam Shaping XI, Proceedings of the Society of Photo-Optical Instrumentation Engineers (SPIE), San Diego, USA, 1-5 August 2010As 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.enHigher-order Bessel beamLaguerre Gaussian beamsAxiconBessel beamLaser beam shapingPhoto optical instrumentation engineeringConference PresentationIsmail, Y., Barnes, G., Mhlanga, T., Belyi, V., & Forbes, A. (2010). Higher-order Bessel like beams with z-dependent cone angles. SPIE. http://hdl.handle.net/10204/5278Ismail, Y, G Barnes, T Mhlanga, V Belyi, and A Forbes. "Higher-order Bessel like beams with z-dependent cone angles." (2010): http://hdl.handle.net/10204/5278Ismail Y, Barnes G, Mhlanga T, Belyi V, Forbes A, Higher-order Bessel like beams with z-dependent cone angles; SPIE; 2010. http://hdl.handle.net/10204/5278 .TY - Conference Presentation AU - Ismail, Y AU - Barnes, G AU - Mhlanga, T AU - Belyi, V AU - Forbes, A AB - 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. DA - 2010-08 DB - ResearchSpace DP - CSIR KW - Higher-order Bessel beam KW - Laguerre Gaussian beams KW - Axicon KW - Bessel beam KW - Laser beam shaping KW - Photo optical instrumentation engineering LK - https://researchspace.csir.co.za PY - 2010 T1 - Higher-order Bessel like beams with z-dependent cone angles TI - Higher-order Bessel like beams with z-dependent cone angles UR - http://hdl.handle.net/10204/5278 ER -