Journal ArticleDOI
Optical beam propagation for a partially coherent source in the turbulent atmosphere
S. C. H. Wang,Martin A Plonus +1 more
TLDR
In this article, the extended Huygens-Fresnel principle is used to formulate general expressions of the mutual intensity function for a finite optical source with partial spatial coherence propagating in the weakly turbulent atmosphere.Abstract:
The extended Huygens-Fresnel principle is used to formulate general expressions of the mutual intensity function for a finite optical source with partial spatial coherence propagating in the weakly turbulent atmosphere. Formulations are developed for both the focused and collimated Gaussian beam. Generalized criterion for the effective far-field range is defined in terms of the source aperture, optical wave number, source coherence, and characteristic length associated with the atmospheric turbulence. Beam spread and lateral coherence length in the near and far field are investigated for a combination of parameter variations and the physical implications discussed. Finally, analytic results are calculated and plotted to illustrate the functional behavior of relevant physical parameters.read more
Citations
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Journal ArticleDOI
Atmospheric turbulence effects on a partially coherent Gaussian beam: implications for free-space laser communication.
TL;DR: In this article, a quasi-monochromatic Gaussian laser beam propagating in atmospheric turbulence is examined by using a derived analytic expression for the cross-spectral density function.
Journal ArticleDOI
Propagation of various dark hollow beams in a turbulent atmosphere
Yangjian Cai,Sailing He +1 more
TL;DR: It is found that after a long propagation distance a dark hollow beam of circular or noncircular eventually becomes a circular Gaussian beam (without dark hollow) in a turbulent atmosphere, which is much different from its propagation properties in free space.
Journal ArticleDOI
Model for a partially coherent Gaussian beam in atmospheric turbulence with application in lasercom
TL;DR: In this paper, an analytical expression for the mutual coherence function (MCF) and the scintillation index of a partially coherent lowest order Gaussian beam wave propagating through the atmosphere (based on Kolmogorov spectrum model) is developed for the pupil plane of a receiving system.
Journal ArticleDOI
Electromagnetic beam propagation in turbulent media: An update
TL;DR: In this article, the authors reviewed the recent developments on wave propagation in turbulent media, including adaptive optics, intensity scintillations, pulse propagation, atmospheric measurements at visible, IR, and millimeter wave frequencies, speckle interferometry, and other related topics.
Journal ArticleDOI
Propagation of Partially Coherent Beam in Turbulent Atmosphere: a Review (Invited Review)
TL;DR: In this paper, the basic theory for treating the propagation of optical beams in turbulent atmosphere is described, and recent theoretical and experimental developments on propagation of a partially coherent beam in turbulent environment are reviewed.
References
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Journal ArticleDOI
Coherence and radiometry with quasihomogeneous planar sources
William H. Carter,Emil Wolf +1 more
TL;DR: In this paper, the concept of quasihomogeneous sources is introduced and an important reciprocity relation is shown to exist between light in the far zone and in the source plane, which implies that the degree of coherence in far zone is given by the classic form of the van Cittert-Zernike theorem, even though the source may have a high degree of spatial coherence over arbitrarily large areas.
Journal ArticleDOI
Mutual coherence function of a finite cross section optical beam propagating in a turbulent medium.
TL;DR: A general expression is derived for the mutual coherence function (MCF) of a finite optical beam propagating in a weakly inhomogeneous medium such that for distances much less than z(B), the MCF is well approximated by the plane (spherical) wave results.
Journal ArticleDOI
Broadening of a laser beam in a turbulent medium
Z. I. Feizulin,Yu. A. Kravtsov +1 more
Journal ArticleDOI
Atmospheric propagation of partially coherent radiation
TL;DR: In this article, an extended Rayleigh-Sommerfeld integral method is used to derive expressions for the mutual coherence function and radiation intensity derived from a planar, partially coherent source propagating through the atmosphere.
Journal ArticleDOI
Measurement of surface roughness properties by means of laser speckle techniques
H. Fuji,T. Asakura,Y. Shindo +2 more
TL;DR: In this paper, the statistical properties of speckle intensity variations produced by coherent light in the far-field diffraction plane of an iluminated area of an object are studied experimentally as a function of the radius of an illuminating beam over the object and are found to have a relation to its surface roughness and correlation lenght.