Injection type chaotic vertical surface laser-based bidirectional communication system

Abstract

The invention belongs to the technical field of optical information, and particularly relates to an injection type chaotic vertical surface laser-based bidirectional communication system. The system comprises a driving laser which is used for generating chaotic signals, the chaotic signals are divided into two paths of signals after passing through a neutral-density filter and an optical isolator,and the two paths of signals are respectively injected into two subordinate lasers after respectively passing through the optical isolator and a polarized half-wave plate, so as to generate chaotic synchronization; the outer cavities of both the driving laser and the subordinate lasers pass through the polarized half-wave plates, the optical signals in the horizontal direction are utilized to carry out phase modulation on the optical signals in the vertical direction, and feedback is formed; and chaotic optical signals of the subordinate lasers are divided into two paths of signals, one pathof signals communicate with a reception end through an optical fiber and the other path of signals are used for detection of a photoelectric detector. According to the constructed injection type chaotic vertical surface laser-based bidirectional communication system, chaotic communication is realized by utilizing an optical device, so that the time delay of feedback is hidden and the system has the characteristics of being low in cost, stable in performance and high in confidentiality.

Description

technical field [0001] The invention belongs to the technical field of optical information, and in particular relates to a two-way communication system based on an injection type chaotic vertical surface laser. Background technique [0002] Chaos is a deterministic quasi-random process. Chaotic signals have the characteristics of high randomness, high complexity, unpredictability, and continuous bandwidth spectrum, which makes chaos have broad prospects in secure communication, image encryption, and signal detection. Chaos synchronization is the key technology of chaos communication. To achieve chaos synchronization, the parameters of the transmitter and receiver must be the same, and they are also the key parameters of the receiver and transmitter. How to hide and prevent eavesdroppers from stealing is the key to realizing chaos secure communication. Related technologies such as the patent document with the publication number CN201710009936.4 disclose a chaotic light source...

AI Technical Summary

Problems solved by technology

Most of the current research is based on one-way communication, and the communication cost is high. With the continuous development of optical communication technology, two-way and multi-directional chaotic secure communication will have more practical application value, and at the same time improve anti-jamming and anti-deciphering for wonton communication The ability requirements of the system are constantly improving, and the research on improving the confidentiality of chaotic communication is constantly deepening

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