A double-encrypted free-space optical communication method and system capable of circumvention

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, improving communication performance, and enhancing confidentiality

Active Publication Date: 2021-08-13
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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  • A double-encrypted free-space optical communication method and system capable of circumvention
  • A double-encrypted free-space optical communication method and system capable of circumvention
  • A double-encrypted free-space optical communication method and system capable of circumvention

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Embodiment Construction

[0036] The invention will now be described in further detail with reference to the drawings.

[0037] It should be noted that the use of "upper", "", "," left "," left "," right "," front "," ",", ",", ",", "," The scope of the present invention can be embodied, and the relative relationship is changed or adjusted, and it is also considered to be the scope of the embodiments of the present invention without substantial change.

[0038] In the present invention, we proposed a double-encrypted free space optical communication method, which not only uses a chaotic laser encryption method on the physical level to encrypt the laser, but also use high Villen in the digital field. The chaotic system constitutes a sequence password to encrypt information, and we combine two encryption methods greatly enhance the security of communication transmission. Further, a new type of structural beam is also used in this application, the free space optical communication is used, and the self-healing...

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Abstract

The invention discloses a double-encrypted free-space optical communication method and system capable of circumventing barriers. The semiconductor laser generates chaos through two methods of external light injection and optical feedback. The master laser and the slave laser with the same structure are used to realize chaos synchronization. The digital encryption technology is used to encrypt the plaintext information by using the chaotic signal generated by the Lorentz system as the key, and then the ciphertext is hidden in the chaotic carrier wave for transmission to realize double encryption. At the same time, the present invention also adopts the Airy beam with self-healing characteristics to carry out free-space optical communication, which can effectively overcome smaller obstacles and combat atmospheric turbulence disturbance, and improve communication performance.

Description

Technical field [0001] The present invention relates to light transmission techniques in the field of communication technologies, and more particularly to a double-encrypted free space optical communication method and system. Background technique [0002] With the rapid development of Internet technology and communication technology, multimedia communications have gradually become an indispensable part of people's lives, and people can exchange and trade in the network environment. However, traditional communication technologies cannot meet the increasing number of wireless communication services and rapid growth, and discovering large-capacity information transmission methods into urgent needs. Currently, a new wireless optical communication transmission technology is from the free space optical, fso. The principle is basically consistent with the principle of fiber transmission, but the FSO technology can transfer the beam carrying information directly to the destination, no wi...

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Application Information

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Patent Type & Authority Patents(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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