Ultraviolet light communication system based on gallium oxide solar blind detector

Abstract

The invention relates to the technical field of optical communication, in particular to an ultraviolet light communication system based on a gallium oxide solar blind detector, which comprises a transmitting end, a communication channel and a receiving end, and is characterized in that the transmitting end is composed of an information source, a modulation system, a driving circuit and an ultraviolet light source; the communication channel performs information transmission by taking ultraviolet light of a solar blind wave band (200-280nm) and atmosphere as transmission media; the receiving end is composed of a gallium oxide solar-blind ultraviolet detector, a demodulation system and an information sink, the gallium oxide solar-blind ultraviolet detector can receive solar-blind area ultraviolet light with the 254 nm wave band, a data receiving module, a data processing module and the like are arranged in the detector, and therefore the communication system has the advantages of being high in anti-interference capacity, achieving non-line-of-sight communication and the like, and has a wide application prospect. In addition, the method has the advantages that an optical filter does not need to be used, a data processing circuit does not need to be independently connected and the like, the size of a hardware system is reduced, and the reliability of a communication system is improved to a certain extent.

Description

technical field [0001] The invention relates to the technical field of wireless optical communication, in particular to an ultraviolet optical communication system based on a gallium oxide solar blind detector. Background technique [0002] As a method of wireless communication, wireless optical communication combines the advantages of optical fiber communication and microwave communication. It has the advantages of large communication capacity and high-speed transmission. It does not need to lay cables like wired communication, which greatly saves costs. [0003] As a branch of wireless optical communication, ultraviolet light communication uses ultraviolet light as the transmission medium to transmit information. The ultraviolet light in the 200-280nm band is usually called the solar blind zone ultraviolet light. The ultraviolet light in this band will be absorbed by the ozone layer before reaching the ground. Therefore, when the ultraviolet light in this band is used for ...

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Problems solved by technology

[0004] At present, the commonly used optical communication detectors include photomultiplier tubes and avalanche photodiodes. Their photosensitive areas are mostly located in the visible light to infrared light band, and there are many external interferences. Most of them need to be used in conjunction with filters in ultraviolet optical communication systems. The light of other bands in the atmosphere, and the photomultiplier tube needs hundreds of thousands of volts of high voltage when it works, which greatly increases the complexity of the circuit design; while the receiving area of ​​the avalanche photodiode is very small, it usually needs to use a focusing lens to increase Large detection area

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