Proceedings Article | 9 December 2014
KEYWORDS: Signal attenuation, Atmospheric modeling, Laser scattering, Signal detection, Scattering, Laser systems engineering, Laser applications, Water, Target detection, Atmospheric sensing
The laser detection and identification is based on the method of using laser as the
source of signal to scan the surface of ocean. If the laser detection equipment finds out
the target, it will immediately reflect the returning signal, and then through receiving
and disposing the returning signal by the receiving system, to realize the function of
detection and identification. Two mediums channels should be though in the process
of laser detection transmission, which are the atmosphere and the seawater. The
energy loss in the process of water transport, mainly considering the surface reflection
and scattering attenuation and internal attenuation factors such as seawater. The
energy consumption though atmospheric transmission, mainly considering the
absorption of atmospheric and the attenuation causing by scattering, the energy
consumption though seawater transmission, mainly considering the element such as
surface reflection, the attenuation of scattering and internal attenuation of seawater.
On the basis of the analysis and research, through the mode of establishment of
atmospheric scattering, the model of sea surface reflection and the model of internal
attenuation of seawater, determine the power dissipation of emitting lasers system,
calculates the signal strength that reaches the receiver. Under certain conditions, the
total attenuation of -98.92 dB by calculation, and put forward the related experiment
scheme by the use of Atmospheric analog channel, seawater analog channel. In the
experiment of the theory, we use the simulation pool of the atmosphere and the sea to
replace the real environment where the laser detection system works in this kind of
situation. To start with, we need to put the target in the simulating seawater pool of 10
meters large and then control the depth of the target in the sea level. We, putting the
laser detection system in position where it is 2 kilometers far from one side, secondly
use the equipment to aim at the target in some distance. Lastly, by launching and
detecting the signal of returning wave, identify the effect of the image produced by
the system.
