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  1. 2 Open Physics
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  1. 2 2008
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  1. 2 Tan W.
  2. 2 Zhao C.
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Content available remote An optical system with aberrations on diffraction integrals written in terms of a generalized ABCD matrix
100%
Zhao C. , Tan W.
Open Physics
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2008
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tom 6
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nr 4
895-902
EN
Abstract: In this paper, we consider the transformation of a ray beam as it passes through an optical system containing a glass plate with parallel surfaces inclined to the optical axis at the Brewster’s angle, by investigating the effects of the optical system on amplitude and phase distributions. By applying generalized matrix optics and diffraction integrals and considering the influence of a quarter of a wavelength of aberration on the transmitted amplitude and phase distributions at the focus of a de-collimating lens, we find that the central peak amplitude descends from 1.0 to 0.8 and the phase distortion is less than π/2. The general feature of the amplitude distribution shows an elongation along the y-axis perpendicular to the optical axis in the direction of tilt of the inclined plate, and conforms to the inclination direction of the glass plate.
2
Content available remote Instability analysis of Gaussian beam propagation in a nonlinear refractive index medium
100%
Zhao C. , Tan W.
Open Physics
|
2008
|
tom 6
|
nr 4
903-911
EN
In this paper, we use a thin filament two dimensional Gaussian beam to model the self-trapping filament. The instability of the propagation of a Gaussian beam through a nonlinear refractive index media is investigated, theoretically and numerically. Specifically, the small scale instability of the beam is examined. The numerical results show that the propagation of the two dimensional Gaussian beam presents one or more nonlinear focal points.
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