OPTICAL COMMUNICATION SYSTEM Russian patent published in 2021 - IPC H04B7/00 

FIELD: optics.

SUBSTANCE: invention relates to optical communication and information transmission and can be used to organize communication between different mobile and stationary ground objects, and between objects such as "aircraft - ground". For this purpose, in an optical communication system comprising a transmitting channel consisting of a forming optical system in the focal plane of which there are laser radiators, and receiving channel, having one after another focusing objective lens and photodetector, laser emitters are made tunable along wavelength, each of which generates optical radiation at a wavelength corresponding to one of the Fraunhofer absorption lines, a transmitting channel includes a laser emitter wavelength control unit, and the receiving channel includes one or more narrow-band filters, each of which transmits radiation in a narrow spectral range, wherein the maximum transmission coefficient of the filter corresponds to the wavelength of one of the Fraunhofer absorption lines, wherein laser radiation, narrow-band filter and photodetector are matched according to spectral range of operation. Transmitting and receiving channels operate in the infrared and/or ultraviolet range of optical radiation at wavelengths corresponding to Fraunhofer absorption lines.

EFFECT: technical result consists in improvement of noise immunity of the optical communication system and ensuring concealment of its operation from visual detection.

4 cl, 1 dwg