Optical Wireless Communication for Underwater

This paper is very interesting for me. Tell me about WSN applications in the under water field. In this paper show compare about performance LED wavelength take on water attenuation. This is inspiring me about wavelength that more survive if used for FSO communication between Sensor.

Underwater wireless optical communication has been used for application between mobile vehicles or fixed node. It because Green or Blue light more carry data higher than acoustical andmegnetic.

This paper can explain more detail. File Size: 2.97 MB

Optical Wireless Communication for Underwater Wireless Sensor Networks: Hardware Modules and Circuits Design and Implementation Click Here

Found on IEEE explore website

So, Information about this paper according my understanding is

1) Author Name : 

Davide Anguita, Davide Brizzolara And Giancarlo Parodi

2) Title Of Paper : 

Optical Wireless Communication for Underwater Wireless Sensor Networks: Hardware Modules and Circuits Design and Implementation.

3) Source : 

OCEANS 2010, IEEE Conference Publication.

4) Summary Of Reported Research :

In this paper, An experimental purpose to simulating water attenuation from different wave length. 

First step, for simulating water, used water pipe with length 2 meter. Pipe built from high density polyethylene.

Step two, simulating point to point communication with measuring photodiode sensitivity to Wavelength light that produce from LED. And the result is Infra Red become the best in sensitivity of photodiode. With smallest absorbsion coeficient 6.0 x 10^-2  Cm^-1

For detail look at this table

but when the light was tested in muddy water, Infra Red is more bad performance than Red Light, Blue Light and Green Light. The output current for infrared is less than  blue/green light at 10m, even if the sensitivity of the photodiode is higher for infrared.

5) Strength Of Invention:

Optical Underwater Communication has advantage

>> The high data-rate, which can range from Mb/s to Gb/s, if using LASER.

>> Possibility of using relatively low-power components and circuits equipped with

     LEDs and photodiodes;

>> Possibility of targeting relatively small dimensions and low costs for the

     communication system

6) Weakness :

in addition to the discussion about the influence of water turbidity , this paper does not include light interferen parameters that might increase the BER.

7) Limitation:

Simulation and Testing was limited to solving the problems of communication point to point.