Underwater irradiance fluctuations of a laser beam after transmission through a wavy sea surface

2003 ◽  
Author(s):  
H. Michael Tulldahl
2019 ◽  
Vol 58 (29) ◽  
pp. 8126
Author(s):  
Frédéric Schwenger ◽  
Norbert Scherer-Negenborn ◽  
Katrin Braesicke

2016 ◽  
Vol 65 (14) ◽  
pp. 144204
Author(s):  
Zhang Xiao-Hui ◽  
Zhang Shuang ◽  
Sun Chun-Sheng

1995 ◽  
Vol 34 (7) ◽  
pp. 1156
Author(s):  
P. V. Grigoriev ◽  
E. C. Benck ◽  
H. A. Schuessler ◽  
A. M. Lomonoso ◽  
V. G. Mikhalevich
Keyword(s):  

2007 ◽  
Author(s):  
Min Xia ◽  
Kecheng Yang ◽  
Yi Zheng ◽  
Jionghui Rao

1979 ◽  
Vol 32 (5) ◽  
pp. 469 ◽  
Author(s):  
DM Phillips

The angular and temporal distributions of energy in the reflection of a pulsed laser beam from a sea surface depend on the diameter of the beam and on the wavenumber spectrum of the water surface. Theoretical expressions are derived for the influence on the reflection of the mean height and slope of waves in the illuminated area as well as the variation of the height and slope within this area. The results are applied to airborne lasers for wave height profiling, altimetry and water depth sounding. The optimum beam diameter depends on both the application and the wavenumber pectrum of the water surface.


2019 ◽  
pp. 62-71
Author(s):  
Vladimir Ivanovich Polenin

Relationships of cause and effect which are the cornerstone of the phenomenon of observability of area of hydrophysical indignations from an underwater moving object, including its exit to a sea surface when lighting the area in the thickness of water by a laser beam and radiation of the sea surface over an object with a radar station signal are described in the article. In the stationary marine environment the laser beam creates a backscattering signal of a fixed level. In the area of hydrodynamic indignations from an underwater moving object the signal of a backscattering of variable brightness to the relevant structure and level of indignations is seen. The similar phenomenon of a backscattering of the electromagnetic radiation of radar station that creates glare effects on the screen of radar station in a zone of an exit of hydrodynamic indignations is observed on a water surface. It is shown that these phenomenons have similar nature caused by the change of dimensional orientation of dipoles of molecules and liquid crystals clusters of water in the field of the hydrodynamic indignations accompanying the moving of an underwater object. Establishing of this characteristic, in case of its confirmation by test data, meets the requirements of qualification of opening.


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