Open AccessPower spectrum of refractive-index fluctuations in turbulent ocean and its effect on optical scintillation
Author(s) -
Xiang Yi,
Ivan B. Djordjević
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.010188
Subject(s) - scintillation , turbulence , spectral density , physics , refractive index , optics , scalar (mathematics) , computational physics , spectral slope , spectral line , range (aeronautics) , materials science , mechanics , quantum mechanics , statistics , geometry , mathematics , detector , composite material
Recent simulations and experiments have shown that the viscous-range temperature spectrum in water can be well described by the Kraichnan spectral model. Motivated by this, a tractable expression is developed for the underwater temperature spectrum that is consistent with both the Obukhov-Corrsin law in the inertial range and the Kraichnan model in the viscous range. In analogy with the temperature spectrum, the formula for the salinity spectrum and the temperature-salinity co-spectrum are also derived. The linear combination of these three scalar spectra constitutes a new form of the refractivity spectrum. This spectral model predicts a much stronger optical scintillation than the previous model.