Electro-optic phase mutual coupling bidirectional chaotic communication system

A chaotic communication and phase technology, applied in the field of secure communication and information security, can solve problems such as difficulty in reconstructing chaotic dynamics, and achieve the effect of strong secrecy and stable performance

Active Publication Date: 2021-05-28
HANGZHOU DIANZI UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the internal parameters of the laser vary less, but if the feedb

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  • Electro-optic phase mutual coupling bidirectional chaotic communication system
  • Electro-optic phase mutual coupling bidirectional chaotic communication system
  • Electro-optic phase mutual coupling bidirectional chaotic communication system

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Embodiment Construction

[0036] In order to illustrate the embodiments of the present invention more clearly, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other accompanying drawings based on these drawings and obtain other implementations.

[0037] The two-way chaotic communication system with electro-optical phase mutual coupling in the embodiment of the present invention includes a sending end and a receiving end, and the sending end and the receiving end are connected through optical fibers.

[0038] Specifically, the sending end includes a first chaotic laser, a first beam splitter, a first circulator, a first coupler, a first Mach-Zehnder interferometer, a first photodetector, a first electrical amplifier, and a second chaotic A laser, a second circulator,...

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Abstract

The invention relates to an electro-optic phase mutual coupling bidirectional chaotic communication system, which comprises a transmitting end and a receiving end which are connected through an optical fiber, the transmitting end comprises a first chaotic laser, a first beam splitter, a first circulator, a first coupler, a first Mach-Zehnder interferometer, a first photoelectric detector, a first electric amplifier and a first phase modulator which are connected in sequence; the system further comprises a second chaotic laser, a second circulator, a second Mach-Zehnder interferometer, a second photoelectric detector and a second electric amplifier which are connected in sequence, the second electric amplifier is connected with the first phase modulator, and the first circulator and the second circulator are both connected with the second coupler. The second coupler and the first phase modulator are connected with the third circulator; and the receiving end and the sending end have the same structure. The chaotic communication system not only realizes chaos time delay hiding of chaos synchronous communication, but also has the characteristics of stable performance, high confidentiality and the like.

Description

technical field [0001] The invention belongs to the technical field of confidential communication and information security, and in particular relates to a two-way chaotic communication system with electro-optic phase mutual coupling. Background technique [0002] The basis of optical chaos communication is chaos synchronization. The premise is that the parameters at the sending end and the receiving end match, and the internal parameters of the laser may be guessed by eavesdroppers. Because the internal parameters of the laser vary less, but if the feedback delay is hidden, it is difficult to reconstruct the chaotic dynamics. In order to ensure the safety of communication, by modulating the signal to be sent into the optical chaotic signal, the signal can be demodulated by using the robustness of the chaotic signal to subtract the received chaotic signal from the local chaotic signal at the receiving end. [0003] Therefore, it is necessary to hide the feedback time delay p...

Claims

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Application Information

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IPC IPC(8): H04L9/00H04B10/50H04B10/516H04B10/67H04B10/69
CPCH04L9/001H04B10/5051H04B10/5161H04B10/676H04B10/69
Inventor 李齐良唐艺文董文龙胡淼周雪芳唐向宏曾然
Owner HANGZHOU DIANZI UNIV
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