Laser beam expanding wireless optical communication system based on engineering diffuser and frosted glass scattering sheet

Abstract

The invention provides a laser beam expanding wireless optical communication system based on an engineering diffuser and a frosted glass scattering sheet, and relates to the technical field of optical information. At present, a laser and a light emitting diode are generally adopted as communication light sources in a wireless optical communication system, but the two schemes cannot give consideration to long-distance and high-speed data transmission and convenient link alignment. In the scheme provided by the invention, when the loss of a communication link is relatively low, the engineering diffuser is adopted to expand the light beam, so that the large-angle coverage of the light beam can be realized, and the link alignment requirement is reduced to the greatest extent. When the loss of a communication link is relatively high, the frosted glass scattering sheet is adopted to carry out small-angle beam expansion on a light beam, so that high-speed low-error-code transmission in a small-angle range can be realized. Compared with other link alignment solutions, the method has the advantages of being simple in structure, low in cost, flexible to use, high in stability and the like, and has good application prospects in the fields of free space optical communication, underwater wireless optical communication and the like.

Description

[0001] manual technical field [0002] The invention relates to a communication method using an expanded beam laser as a carrier light source of a free space optical (FSO) communication system and an underwater wireless optical communication (UWOC) system, belonging to the technical field of optical information. Background technique [0003] As a new type of communication technology, wireless optical communication technology has the advantages of both mobile communication and optical fiber communication, such as flexible networking, high broadband, anti-electromagnetic interference, no need to apply for frequency, and good confidentiality. And with the in-depth exploration and development of outer space, atmospheric space and ocean, it is imminent to establish an air-sea wireless optical communication network based on free space optical communication technology and underwater wireless optical communication technology. [0004] At present, the communication light sources used...

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Problems solved by technology

[0005] In order to solve the alignment problem of the existing high-speed wireless optical communication, the present invention proposes a laser beam expanding wireless optical communication system based on engineering diffuser (ED) and ground glass diffuser (GGD). can reduce the alignment requirements of high-speed wireless optical communication systems

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