Multiway light injection low-correlation long-distance light chaotic synchronization method and device

Abstract

The invention discloses a multiway light injection low-correlation long-distance light chaotic synchronization method and device. The method comprises the steps of generating chaotic drive signals; injecting the amplified chaotic drive signals into multiway non-equidistant optical fiber links; collecting the signals and carrying out beam splitting on the signals, thereby dividing the signals intotwo same laser beams; carrying out long-distance transmission and injecting the laser beams into two symmetrical licensed lasers; and driving the two licensed lasers to form chaotic dynamic systems and enabling the chaotic dynamic systems to realize chaotic synchronization. The device comprises a drive module and an external environment module. According to the method and the device, the light isinjected into the optical fiber links in a multiway non-equidistant mode, the remote zero hour chaotic synchronization is effectively realized, the correlation degree between a drive laser and the licensed lasers is clearly reduced, the security assurance for the long-distance transmission of chaotic carriers of a chaotic secret system is provided, and the possible security vulnerability problem in the long-distance high-speed light chaotic secret communication scheme can be shielded effectively.

Description

technical field [0001] The invention relates to a low-correlation long-distance optical chaos synchronization method of multi-channel optical injection and a device for realizing the method. Background technique [0002] In recent years, people's research on chaotic secure communication is mainly divided into two categories, one is electrical chaotic secure communication based on electronic circuit technology, and the other is laser chaotic secure communication combined with optical technology. Among them, due to the inherent bottleneck problems of the response bandwidth of electronic circuit devices and the long-distance high transmission loss of electronic signals, electrical chaos secure communication cannot be applied in the field of long-distance high-speed secure communication. Due to the natural high modulation bandwidth of semiconductor lasers and the long-distance and low-loss transmission characteristics of optical fibers, laser chaotic secure communication has goo...

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Problems solved by technology

But it is not enough to realize the one-way long-distance chaotic confidential transmission of information

Some people have also proposed a long-distance laser chaos synchronization scheme. For example, in the invention patent document with the application number 201610101144.5 and the title "a long-distance two-way video security communication based on laser chaos", a two-way synchronization with a distance of 40 km is proposed. A technical scheme that responds to the chaotic synchronization of semiconductor lasers under the driving of semiconductor lasers to achieve bidirectional confidential transmission of information, but because in the above invention, a single optical fiber link is used to transmit the driving signals generated by driving semiconductor lasers, resulting in However, the correlation between the waveform of the signal at the driving semiconductor laser and the waveform of the chaotic signal at the authorized semiconductor laser is very high (up to 0.741), which indicates that if the chaotic signal leaks here, potential information decipherers can completely According to this high degree of correlation, the approximate transmission information is restored, which brings great hidden dangers to the security of information.

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