Electro-optic phase mutual modulation chaotic multichannel one-way secret communication system

Abstract

The invention discloses an electro-optic phase mutual modulation chaotic multichannel one-way secret communication system. Four chaotic lasers at a sending end generate four paths of chaotic signals, the chaotic signals are converted into radio-frequency electric signals through a photoelectric detector, and the radio-frequency electric signals are transmitted to corresponding phase modulators to perform phase modulation on optical signals in corresponding optical paths to generate phase chaotic signals. Four paths of phase chaotic signals are converted to different wavelengths through a wavelength converter and are combined into one path through a wavelength division multiplexer to be transmitted to a receiving end, the wavelength division multiplexer at the receiving end divides the signals into four paths, the signals are converted to the same wavelength through the wavelength converter, and the four paths of signals are respectively converted into radio frequency electric signals through corresponding photoelectric detectors, and the optical signals of the corresponding optical paths are subjected to phase modulation through the phase modulator; reverse phase chaos is generated, phase chaos of the optical path signals is counteracted, intensity chaos signals are generated, and the robustness of the intensity chaos is used for decrypting the multiple paths of signals. Multi-channel chaotic synchronous communication is realized, and the confidentiality is high.

Description

technical field [0001] The invention belongs to the technical field of secure communication and information security, in particular to an electro-optic phase intermodulation chaotic multi-channel one-way secure communication system. Background technique [0002] The optical chaotic signal has the characteristics of wide frequency band, strong anti-intercept ability, fast transmission rate and low attenuation, so the optical chaotic signal becomes an excellent candidate for secure communication. The basis of chaos communication is chaos synchronization, so the premise of realizing chaos communication is that the transmitter and receiver must be completely synchronized. [0003] In the prior art, basically, after a laser generates a signal, it passes through a phase modulator, a Mach-Zehnder interferometer, a photodetector, and a radio frequency amplifier to form electro-optical oscillation and generate phase chaos. Its complexity is not high, and the signal wavelength There ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, basically, after a laser generates a signal, it passes through a phase modulator, a Mach-Zehnder interferometer, a photoelectric detector, and a radio frequency amplifier to form electro-optical oscillations and generate phase chaos. Its complexity is not high, and the signal wavelength Only one, less confidentiality of communication

Images