Underwater lighting and communicating system based on visible light laser source

A laser light source and underwater lighting technology, applied in the field of wireless communication, can solve the problems of low communication frequency, narrow super/very low frequency radio communication frequency band, low communication rate, etc., and achieve the effect of fast communication rate and high energy utilization efficiency

Inactive Publication Date: 2017-12-01
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Underwater lighting and communicating system based on visible light laser source

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Comparison scheme
Effect test

Embodiment 1

[0020] The laser light source 3 simultaneously uses a gallium nitride-based blue laser with a peak wavelength of 450nm, a gallium nitride-based green laser at 520nm, and a gallium arsenide-based red laser with a peak wavelength of 650nm. Each laser is driven by a DC drive power supply 1, and uses Semiconductor cooling sheets are packaged for heat dissipation, and the emitted light power of each wavelength of the laser is about 100 mW. The laser light source with red, green, and blue emission wavelengths can improve the color rendering index of underwater lighting, and the scattering sheet is used to adjust the emission angle of the laser to 50 degrees, increase the area of ​​underwater laser lighting.

[0021] The digital signal of the transmitting signal module 2 and the DC driving power supply 1 are used to jointly drive the laser, and the red, green and blue lasers are used to communicate simultaneously by using the wavelength division multiplexing method to increase the und...

Embodiment 2

[0025] The laser light source 3 uses a GaN-based laser with a peak wavelength of 450nm, driven by a DC drive power supply 1, and uses circulating water for packaging and heat dissipation. The emitted light power of the laser is about 1 W. The motor is used to adjust the position of the lens to adjust the emission of the laser The angle is close to collimation, for example, with a divergence angle of 10 degrees, the laser light source can be used for small area illumination, but the communication distance can be increased to more than 100 meters.

[0026] Use the digital signal of the transmitting signal module 2 and the DC drive power supply 1 to jointly drive the laser, the signal receiving antenna 6 uses a Fresnel lens to focus the received light onto the photodetector 7 APD, and the receiving signal processing module 8 processes and restores the received light digital signal.

[0027] The submarine can be equipped with the above-mentioned laser lighting source, signal trans...

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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...

Claims

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Application Information

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IPC IPC(8): H04B10/116H04B10/80H04B13/02F21V5/00F21V23/00F21V23/02F21V31/00
CPCF21V5/00F21V23/003F21V23/02F21V31/00H04B10/116H04B10/80H04B13/02
Inventor 田朋飞刘晓艳易肃羽刘冉郑立荣
Owner FUDAN UNIV
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