Dual-encryption barrier-bypassing free space optical communication method and system

Abstract

The invention discloses a dual-encryption free space optical communication method and system capable of avoiding obstacles. According to the technical scheme, the semiconductor laser generates chaos in two modes of external light injection and light feedback; chaos synchronization is realized by using a master laser and a slave laser with the same structure; meanwhile, a digital encryption technology is adopted, namely, a chaotic signal generated by a Lorentz system is used as a secret key to encrypt plaintext information, and then a ciphertext is hidden in a chaotic carrier for transmission, so that dual encryption is realized. Meanwhile, the Airy beam with the self-healing characteristic is adopted for free space optical communication, small obstacles can be effectively overcome, atmospheric turbulence disturbance can be effectively resisted, and communication performance is improved.

Description

technical field [0001] The invention relates to the optical transmission technology in the field of communication technology, in particular to a double-encrypted free-space optical communication method and system capable of bypassing barriers. Background technique [0002] With the rapid development of Internet technology and communication technology, multimedia communication has gradually become an indispensable part of people's life, and people can communicate and trade in the network environment. However, traditional communication technologies cannot meet the increasingly complex wireless communication services and the rapidly increasing number of users, and it is urgent to find a large-capacity information transmission method. At present, a new wireless optical communication transmission technology has sprung up—Free Space Optical (FSO) communication. Its principle is basically the same as that of optical fiber transmission, but FSO technology can directly transmit the ...

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