Underwater lighting and communicating system based on visible light laser source

Abstract

The present invention belongs to the field of wireless communication technology, and discloses an underwater lighting and communicating system based on a visible light laser source. The system of the present invention uses a laser source with a light emitting wavelength in the visible light range. The laser source is made of gallium-nitride-based or gallium-arsenide-based semiconductor materials. The laser source is driven by a DC driving power source and is subjected to heat radiating package. After the emitted laser is scattered by an optical element, the laser can be used for underwater lighting; through the adding of a communicative modulation signal to jointly drive the laser together with the DC power supply, the laser source possesses the dual role of underwater lighting and communicating; in order to achieve the communicating purpose, the receiving end utilizes the optical element as the receiving antenna; and a photo-detector is used to convert the received optical signal into an electrical signal and the received signal is processed. The system of the invention realizes the purpose of underwater lighting and communicating while the laser source is used, which can achieve the advantages of high energy utilization, fast communication speed, high confidentiality and short time delay.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an underwater lighting and communication system based on a visible light laser light source. Background technique [0002] Marine resources are currently an important resource that countries around the world are competing for. Underwater equipment such as submarines, unmanned underwater vehicles and underwater sensors play a key role in exploring and competing for marine resources. Marine lighting and communications are the key to exploring and developing marine resources. key technologies. On the one hand, the energy consumption of traditional underwater lighting sources and LED light sources is relatively large, while the efficiency of laser light sources is relatively high under high current injection. Laser lighting and display have gradually entered daily applications, but have not yet entered the field of underwater lighting. On the other hand, u...

AI Technical Summary

Problems solved by technology

Underwater acoustic communication has the advantage of long communication distance, but also has the disadvantages of low bandwidth, serious multipath interference, high bit error rate and poor confidentiality; super / very low frequency radio communication has narrow frequency band, small communication capacity, low communication frequency and communication speed The problem of being too low; underwater visible light communication is a hot spot in underwater communication in recent years, and has the advantages of fast underwater communication speed, real-time transmission, localization and high confidentiality

[0003] In recent years, the efficiency of blue-green lasers based on gallium nitride-based materials has been greatly improved, and it also has a high photoelectric modulation bandwidth. The efficiency of lasers based on red-light gallium arsenide-based materials is also relatively high, but the laser-based Underwater lighting and communication still need further development

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