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Volume 27 Issue 3
Sep.  2013
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Focusing properties of Hermite-Gaussian beams passing through an aperture-lens system

  • Received Date: 2002-03-12
    Accepted Date: 2002-06-28
  • The focusing properties of Hermite-Gaussian(H-G)beams in passage through an aperture-lens separation optical system are studied based on the Collins formula.The axial intensity distribution and focal shift of H-G beams with even mode numbers are analyzed and illustrated with detailed numerical examples.It is found that the inverse focal shift and focusing without focal shift can be achieved by a suitable choice of the beam and optical system parameters.In particular,for the TEM22-mode H-G beam,there may be two equal axial maximum intensity points located on two sides of the geometrical focal plane,thus there are two focal shifts with opposite signs.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Focusing properties of Hermite-Gaussian beams passing through an aperture-lens system

  • 1. Institute of Laser Physics and Chemistry, Sichuan University, Chengdu, 610064

Abstract: The focusing properties of Hermite-Gaussian(H-G)beams in passage through an aperture-lens separation optical system are studied based on the Collins formula.The axial intensity distribution and focal shift of H-G beams with even mode numbers are analyzed and illustrated with detailed numerical examples.It is found that the inverse focal shift and focusing without focal shift can be achieved by a suitable choice of the beam and optical system parameters.In particular,for the TEM22-mode H-G beam,there may be two equal axial maximum intensity points located on two sides of the geometrical focal plane,thus there are two focal shifts with opposite signs.

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