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Three-dimensional finite-difference time-domain analysis of nonlinear self-focusing in air

Rastegarfar, H ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.1109/ISTEL.2008.4651293
  3. Publisher: 2008
  4. Abstract:
  5. Through using a three-dimensional finitedifference time-domain (3D-FDTD) scheme, we analyze nonlinear self-focusing in air as a Kerr medium. For sufficiently intense laser beams, the gaseous medium can behave as a strong positive lens which tends to focus the beam. Our simulations' major focus is on the propagation characteristics of an intense continuous-wave laser beam. Necessary relations have been introduced into the conventional FDTD formulation to account for the nonlinear behavior of air. The results clearly indicate that sufficient amounts of optical intensity may lead to self-focusing immediately in front of the laser aperture. ©2008 IEEE
  6. Keywords:
  7. FDTD ; Gaussian profile ; Kerr effect ; Nonlinear polarization vector ; Optical intensity ; Self-focusing ; Fiber optic sensors ; Finite difference time domain method ; Focusing ; Gaussian beams ; Kerr magnetooptical effect ; Laser beams ; Lasers ; Magnetic field effects ; Polarization ; Three dimensional ; Optical Kerr effect
  8. Source: 2008 International Symposium on Telecommunications, IST 2008, Tehran, 27 August 2008 through 28 August 2008 ; October , 2008 , Pages 163-168 ; 9781424427512 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/4651293