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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 62, Iss. 5 — May. 1, 1972
  • pp: 682–684

Transmitter-Size and Focus Effects on Scintillations

J. RICHARD KERR and ROGER EISS  »View Author Affiliations

JOSA, Vol. 62, Issue 5, pp. 682-684 (1972)

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We present generalized numerical predictions of the effects of transmitter-aperture size and divergence on the on-axis scintillations of a laser beam propagating through a turbulent stmosphere, utilizing analytical results obtained from the literature. The sharp reduction of scintillation that has been predicted for a large, focused beam is shown to depend very critically upon the focus adjustment; small misadjustments result in increases by orders of magnitude. This also implies that diffraction-limited optics may be required. This requirement, together with the implications of turbulent beam-wander and spreading effects, suggest that the predicted reduction is of little practical significance. We also present the conditions necessary for obtaining point-source results in scintillation experiments.

J. RICHARD KERR and ROGER EISS, "Transmitter-Size and Focus Effects on Scintillations," J. Opt. Soc. Am. 62, 682-684 (1972)

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