Multi-path information high-speed transmission chaos secret communication device and method

Abstract

The present invention provides a multi-path information high-speed transmission chaos secret communication device and method. Two paths of lasers with different wave lengths are injected into two multi-longitudinal mode lasers with same outer cavity optical mirror feedback mutual coupling non isolators, and the two multi-longitudinal mode lasers perform sync output while achievement of the chaos laser spectrum broadening; the wave lengths of the injected light are regulated to regulate and control the chaos laser spectral bandwidths output by the multi-longitudinal mode lasers and the chaos laser spectral bandwidths of each sub mode; the two obtained synchronization chaos lasers comprising the chaos lasers of the sub modes are divided according to the wave lengths by employing a wavelengthdivision multiplexer, and the obtained chaos lasers with multiple wave lengths are taken as carriers of the chaos secret communication; and information of different rates is loaded at a transmittingend, and a demodulator is employed to demodulate the information at a receiving end. The generated chaos secret communication system has the capacity of achievement of the multi-path information secret communication and can achieve a synchronous loading function of different rate information.

Description

technical field [0001] The invention relates to broadband chaotic laser communication, in particular to a device and method for multi-channel information transmission chaotic security communication, which can be used for chaotic laser wavelength division multiplexing security communication. Background technique [0002] Safe and secure communication technology has always been the goal that people are constantly pursuing, and it is also one of the research hotspots in the field of communication. Chaotic laser communication [Nat. Photonics, Vol. 9, p. 151-162, 2015 and Wiley-VCH, p. 343, 2012] is another promising secure communication technology in the field of information security. Due to the characteristics of laser-like noise, the large-amplitude chaotic laser is used as the carrier wave to hide the information, and then the chaos synchronization technology is used to demodulate the received chaotic signal at the receiving end, and finally the transmitted information is obt...

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Problems solved by technology

[0005] In order to solve the problem that the information rate in the current chaotic secure communication system is limited to the influence of the synchronous chaotic laser spectrum bandwidth, the present invention provides a chaotic secure communication system with adjustable spectral bandwidth of the chaotic laser that can be used for simultaneous loading of multiple channels of information at different rates

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