Influence of temperature and salinity fluctuations on propagation behaviour of partially coherent beams in oceanic turbulence
Data(s) |
2006
|
---|---|
Resumo |
A theoretical study of the behaviour of partially coherent beams propagating through oceanic turbulence has been performed. Based on the previously developed knowledge of beam spreading of a partially coherent beam in the atmosphere and the spatial power spectrum of the refractive index of ocean water, we study the normalized root-mean-square width of a partially coherent beam on propagation through oceanic turbulence and its turbulence distance which may be a measure of turbulence resistance. Our analysis indicates that the behaviour of partially coherent beams on propagation may be described by the rate of dissipation of the mean-squared temperature chi(T) and that of salinity chi(S). In terms of a quantity w that defines the contributions of the temperature and salinity distributions to the distribution of the refractive index, chi(S) could be written as a function of chi(T) and w. Therefore, the behaviour of partially coherent beams on propagation can be characterized only by chi(T) for a given w. The results are shown for curved surfaces, from which one can see that partially coherent beams exhibit robust turbulence resistance when the water volume has a smaller chi(T). |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Lu Wei;刘立人;孙建锋.,J. Opt. A-Pure Appl. Opt.,2006,8(12):1052-1058 |
Palavras-Chave | #partially coherent beam #beam spreading #oceanic optical turbulence #spatial power spectrum of refractive index fluctuation |
Tipo |
期刊论文 |