Day blind ultraviolet laser communication system in free space

Abstract

The invention provides a day blind ultraviolet laser communication system in free space. The system is characterized by comprising an emitting terminal and a receiving terminal, wherein the emitting terminal comprises a day blind ultraviolet laser and a diverging lens; the light emitted by the ultraviolet laser passes through the diverging lens so that the signal light is scattered in a certain diverging angle; the receiving terminal comprises one or multiple ultraviolet detectors, wherein the ultraviolet detector comprises a day blind type band-pass ultraviolet filter, a photomultiplier and a photo detector bracket; received light signals are converted into electric signals by the photomultiplier after being filtered and denoised through the day blind type band-pass ultraviolet filter; and then the information is restored through an amplification and filter demodulator circuit arranged on the back end so as to realize non-sight distance point-to-point or point-to-multipoint broadcast model communication. he day blind ultraviolet laser communication system, the ultraviolet laser is adopted as an emitting light source, the diverging lens is arranged at the light outlet of the ultraviolet laser, and the transmission distance is long, the receiving terminal has simple structure and small volume, and the day blind ultraviolet laser communication system has portability and strong maneuverability.

Description

technical field [0001] The invention relates to an ultraviolet laser optical communication technology, in particular to a solar-blind ultraviolet laser communication system in free space. Background technique [0002] At present, the fast-developing free-space optical communication is mainly infrared laser communication. Compared with microwave communication and radio communication, infrared laser communication has better confidentiality and anti-interference performance. However, the biggest disadvantage of infrared laser communication is that it can only achieve point-to-point line-of-sight communication. If there are obstacles blocking the communication lines, the communication will be interrupted. In recent years, more and more people pay attention to free space ultraviolet light communication, which can realize both line-of-sight communication and non-line-of-sight communication, which makes up for the deficiency of infrared laser communication. [0003] Since ultravio...

AI Technical Summary

Problems solved by technology

However, the biggest disadvantage of infrared laser communication is that it can only achieve point-to-point line-of-sight communication. If there are obstacles blocking the communication lines, the communication will be interrupted.

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