Variance and covariance of irradiance of a finite beam in extremely strong turbulence*

Lee, Myung Hun

doi:10.1364/josa.68.000167

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Although the Propagation Of Laser Beams In Weak1

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1980

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“…When using the extended Huygens-Fresnel principle to compute irradiance fluctuations, researchers generally assume that the complex phase introduced by the turbulence on spherical wavelets emitted by the source is a Gaussian random variable. However, in very strong turbulence it is now well known [Dashen, 1979;de Wolf, 1979;Fante, 1976;Furutsu, 1979;Gurvich et al, 1979;Hood and Lang, 1976;Ishimaru, 1978;Lee, 1978…”

Section: Although the Propagation Of Laser Beams In Weakmentioning

confidence: 99%

Some physical insights into beam propagation in strong turbulence

Fante¹

1980

Radio Science

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In this paper we examine some of the physical implications of using the extended Huygens-Fresnel principle to calculate laser beam properties in strong turbulence. We shall demonstrate the roles played by the log-amplitude and phase fluctuations and will show that quadratic phase structure functions lead to results incompatible with experimental data. We shall also prove that the Huygens-Fresnel principle automatically predicts a normalized irradiance variance of unity and Gaussian field statistics in strong turbulence provided that certain conditions on the turbulence strength and spectrum are satisfied. 0048-6604 / 80 / 0708-0183501.00 757

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