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Optimum beam size for laser beam propagating through atmospheric turbulence

Optimum beam size for laser beam propagating through atmospheric turbulence

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  • Author(s): Y.E. Yenice 1  and  B.G. Evans 2
    • View affiliations
    • Affiliations: 1: Faculty of Engineering at Aksaray, Department of Electrical and Electronic Engineering, Nigde University, Aksaray, Turkey
      2: Centre for Communication Systems Research, University of Surrey, Guildford, United Kingdom
  • Source: Volume 35, Issue 21, 14 October 1999, p. 1875 – 1876
    DOI:  10.1049/el:19991276 , Print ISSN 0013-5194, Online ISSN 1350-911X
© IEE
Published

A previous study concluded that the optimum beam diameter for a laser beam propagating through atmospheric turbulence is of the order of the coherence scale. It is shown that the optimum size is critically dependent on beam wander and pointing accuracy, and can be much smaller. Consequently, the beam size maximising mean intensity may not coincide with the size minimising fluctuations, and a compromise may be necessary.

Inspec keywords: laser beam applications; optical links; atmospheric light propagation; atmospheric turbulence

Other keywords: atmospheric turbulence; atmospheric optical communications; mean intensity; pointing accuracy; beam size; beam wander; fluctuations; coherence scale; laser beam propagation

Subjects: Atmospheric laser beam propagation; Light propagation; Laser applications; Free-space optical links

References

    1. 1)
      • P.J. Titterton . Power reduction and fluctuations caused by narrow laser beam motion inthe far field. Appl. Opt. , 423 - 425
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      • W.B. Miller , J.C. Ricklin , L.C. Andrews . Log-amplitude variance and wave structure function: a new perspectivefor Gaussian beams. J. Opt. Soc. Am. A , 661 - 672
    3. 3)
      • W.B. Miller , J.C. Ricklin , L.C. Andrews . Effects of the refractive index spectral model on the irradiance varianceof a Gaussian beam. J. Opt. Soc. Am. A , 2719 - 2726
    4. 4)
      • J. Dunphy , J. Kerr . Turbulence effects on target illumination by laser sources: phenomenologicalanalysis and experimental results. Appl. Opt. , 1345 - 1358
    5. 5)
      • J.R. Kerr , R. Eiss . Transmitter-size and focus effects on scintillations. J. Opt. Soc. Am. A , 682 - 684
    6. 6)
      • L.C. Andrews , R.L. Phillips , P.T. Yu . Optical scintillations and fade statistics for a satellite communicationsystem. Appl. Opt. , 7742 - 7751
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