Long- and short-term average intensity for multi-Gaussian beam with a common axis in turbulence

doi:10.1088/1674-1056/20/1/014207

中国物理B ›› 2011, Vol. 20 ›› Issue (1): 14207-014207.doi: 10.1088/1674-1056/20/1/014207

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇下一篇

Long- and short-term average intensity for multi-Gaussian beam with a common axis in turbulence

储修祥

College of Sciences, Zhejiang Agriculture and Forestry University, Lin'an 311300, China

收稿日期:2010-05-19 修回日期:2010-06-19 出版日期:2011-01-15 发布日期:2011-01-15

Long- and short-term average intensity for multi-Gaussian beam with a common axis in turbulence

Chu Xiu-Xiang(储修祥)^†

College of Sciences, Zhejiang Agriculture and Forestry University, Lin'an 311300, China

Received:2010-05-19 Revised:2010-06-19 Online:2011-01-15 Published:2011-01-15

摘要/Abstract

摘要： With the help of the extended Huygens--Fresnel principle and the short-term mutual coherence function, the analytical formula of short-term average intensity for multi-Gaussian beam (MGB) in the turbulent atmosphere has been derived. The intensity in the absence of turbulence and the long-term average intensity in turbulence can both also be expressed in this formula. As special cases, comparisons among short-term average intensity, long-term average intensity, and the intensity in the absence of turbulence for flat topped beam and annular beam are carried out. The effects of the order of MGB, propagation distance and aperture radius on beam spreading are analysed and discussed in detail.

Abstract: With the help of the extended Huygens–Fresnel principle and the short-term mutual coherence function, the analytical formula of short-term average intensity for multi-Gaussian beam (MGB) in the turbulent atmosphere has been derived. The intensity in the absence of turbulence and the long-term average intensity in turbulence can both also be expressed in this formula. As special cases, comparisons among short-term average intensity, long-term average intensity, and the intensity in the absence of turbulence for flat topped beam and annular beam are carried out. The effects of the order of MGB, propagation distance and aperture radius on beam spreading are analysed and discussed in detail.

Key words: multi-Gaussian beam, turbulence, short-term average intensity

中图分类号: (Atmospheric turbulence effects)

42.68.Bz

42.25.Dd (Wave propagation in random media) 42.25.Kb (Coherence)

储修祥. Long- and short-term average intensity for multi-Gaussian beam with a common axis in turbulence[J]. 中国物理B, 2011, 20(1): 14207-014207.

Chu Xiu-Xiang(储修祥). Long- and short-term average intensity for multi-Gaussian beam with a common axis in turbulence[J]. Chin. Phys. B, 2011, 20(1): 14207-014207.

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Long- and short-term average intensity for multi-Gaussian beam with a common axis in turbulence

Long- and short-term average intensity for multi-Gaussian beam with a common axis in turbulence

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