Underwater wireless optical communication device and method based on wavelength division multiplexing technology

Abstract

The invention relates to the field of underwater wireless optical communication and aims at providing an underwater wireless optical communication device and method based on a wavelength division multiplexing technology. The device comprises a transmitting end device and a receiving end device. The transmitting end device comprises a signal processor connected with three voltage amplifiers. Each voltage amplifier is connected with an adjustable attenuator, a bias drive module and a laser in sequence. The three lasers are red light, green light and blue light lasers and are connected with a three-in-one optical coupler. The three-in-one optical coupler is arranged opposite to a transmitting end lens. The receiving end device comprises a photoelectric detector arranged opposite to a receiving end lens. The photoelectric detector is connected with the voltage amplifiers, the adjustable attenuators and the signal processor in sequence. Red light, green light and blue light dichroic optical filters are placed on an optical path between the receiving end lens and the photoelectric detector. According to the device and the method, an applicable range of an underwater wireless optical communication system is greatly improved and the normal underwater wireless optical communication can be ensured all the time in different seawater environments.

Description

technical field [0001] The invention relates to the field of underwater wireless optical communication, in particular to an underwater wireless optical communication device and method based on wavelength division multiplexing technology. Background technique [0002] With the increasing demand for high-speed underwater communication, underwater wireless optical communication technology emerged as the times require. It has the advantages of high bandwidth, low power consumption, and low latency. In pure seawater, blue light is less affected by seawater absorption, showing good underwater wireless optical communication performance. In near-shore seawater, blue light is greatly affected by seawater absorption and scattering, while green light is the opposite, which is suitable for wireless optical communication in near-shore seawater. In turbid seawater, blue light and green light are greatly affected by seawater absorption and scattering, while red light is less affected by ...

AI Technical Summary

Problems solved by technology

[0003] Since the feasibility of using red light for wireless optical communication in turbid seawater was only confirmed not long ago, there is no precedent for applying wavelength division multiplexing technology to the field of underwater wireless optical communication.

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