Underwater wireless optical communication device and method thereof

Abstract

The invention discloses an underwater wireless optical communication device and a method thereof. The underwater wireless optical communication device comprises an optical filter, a silicon photodiode, a photoelectric receiving unit, a master control unit, a light modulation driving unit and a green ray light source. The master control unit is connected with an upper computer. The light emission end and the receiving end are integrated in the same circuit to achieve duplex optical communication. The silicon photodiode is used for converting optical signals to weak electric signals. Weak photoelectric current signals are amplified by the photoelectric receiving unit and converted to be level signals which can be processed by the master control unit. Data are stored and processed by the master control unit which is also in communication with the upper computer. The light modulation driving unit controls currents and temperature of a light source so as to guarantee normal working condition, and also modulates signals to the green ray light source. The underwater wireless optical communication device can be flexibly used on various underwater data transmission occasions, and a new scheme is provided for underwater communication.

Description

technical field [0001] The invention belongs to the technical field of wireless optical communication, and in particular relates to an underwater wireless optical communication device and a method thereof. Background technique [0002] With the increase of the world's population and the shortage of land resources, people will devote more energy to the development and utilization of ocean and river resources after entering the 21st century. Due to the impact of human activities on the ecological environment, pollution events such as algae blooms and red tides have occurred from time to time, prompting relevant departments to increase the intensity of early warning and monitoring of various water parameters. [0003] Among the various waves propagating in water, the longitudinal wave (sound wave) has the smallest attenuation, so sonar technology and underwater acoustic information transmission technology are widely used and paid attention to. For transverse waves ...

AI Technical Summary

Problems solved by technology

For transverse waves such as electromagnetic waves, since seawater is a good conductor, the skin effect will seriously affect the transmission of electromagnetic waves in seawater, so that radio waves widely used on land can hardly be applied underwater

At present, acoustic communication technology is widely used in underwater wireless communication. Underwater acoustic communication technology has the advantages of long communication distance and high communication reliability. However, underwater acoustic communication also has many limitations: long transmission delay of underwater acoustic channel, low transfer rate

The currently used laser communication devices are mainly pulsed lasers. Pulsed lasers are large in size, high in cost, and extremely inconvenient to install. They are not suitable for ordinary underwater data transmission.

Optical communication devices lack the selection of actual circuit components and instructions for connection methods

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