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Parametric characteristics for a broadband Gaussian beam in free space

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Abstract

Based on the theory of the second-order intensity moment and the method of Fourier transformation, some parameters for a broadband Gaussian beam in free space are studied analytically and numerically. It is shown that the beam width and the divergence angle for a broadband Gaussian beam in free space are both larger than those for a monochromatic Gaussian beam. The broader the bandwidth of a light beam, the larger the beam width and the divergence angle of the light beam. The beam propagation factor for a broadband Gaussian beam in free space is larger than that for a monochromatic Gaussian beam and increases slowly with bandwidth. The kurtosis parameter for a broadband Gaussian beam in free space increases with propagation distance and bandwidth. The kurtosis parameter for a broadband Gaussian beam with much broader bandwidth increases more remarkably with propagation distance.

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Authors and Affiliations

  1. Department of Physics, Zhejiang University, Hangzhou, 310027, China

    H. Mao & D. Zhao

  2. College of Science, Hangzhou Dianzi University, Hangzhou, 310018, China

    H. Mao

Authors
  1. H. Mao
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  2. D. Zhao
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Correspondence to D. Zhao.

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Mao, H., Zhao, D. Parametric characteristics for a broadband Gaussian beam in free space. Appl. Phys. B 100, 611–616 (2010). https://doi.org/10.1007/s00340-010-3920-2

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  • DOI: https://doi.org/10.1007/s00340-010-3920-2

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