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

An optical communication system and free space technology, applied in the field of optical transmission, can solve problems such as reducing the performance of communication systems, achieve the effects of overcoming interference, enhancing confidentiality performance, and improving communication performance

Active Publication Date: 2021-06-22
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

[0004] At the same time, the Gaussian beam transmitted through the atmospheric channel in FSO communication is extremely vulnerable to the influence of atmospheric turbulence or obstacles and reduces the performance of the communication system

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

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Embodiment Construction

[0034] The present invention is described in further detail now in conjunction with accompanying drawing.

[0035] It should be noted that terms such as "upper", "lower", "left", "right", "front", and "rear" quoted in the invention are only for clarity of description, not for Limiting the practicable scope of the present invention, and changes or adjustments in their relative relationships, without substantial changes in the technical content, shall also be regarded as the practicable scope of the present invention.

[0036] In this invention, we propose a double-encrypted free-space optical communication method that can bypass barriers. It not only uses the chaotic laser encryption method on the physical level to encrypt the laser, but also uses the high-dimensional Lorentz in the digital field to The chaotic system constitutes a sequence cipher to encrypt information. We combine the two encryption methods to greatly improve the security of communication transmission. In add...

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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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/112H04L9/00
CPCH04B10/1123H04L9/001
Inventor 刘博忻向军任建新毛雅亚何思琪王瑞春沈磊吴泳锋孙婷婷赵立龙
Owner NANJING UNIV OF INFORMATION SCI & TECH
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