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Optical chaotic secure algorithm based on space laser communication

  • * Corresponding author: Lu Song

    * Corresponding author: Lu Song
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  • The traditional drive response synchronization control method has the poor robustness, which results in the low security performance of the optical chaotic secure communication. To address this problem, an optical chaotic secure algorithm based on space laser communication is proposed in this paper. With the advantage of space laser communication and full consideration of the influence of complex environment on signal transmission of laser wireless communication, a laser wireless communication channel model is built. Based on this, a hybrid self-synchronization chaotic system model is proposed. It can reduce the information needed for transmission, and only need to transmit a small amount of error correction signals on the channel to achieve synchronization of the receiving and the transmitting system, which greatly suppress the drawback of the traditional method. On the basis of chaotic synchronization, the erbium-doped fiber laser is used for information transmission. Different encryption techniques are used to achieve optical chaotic secure communication within the allowable range of error. Numerical simulation results show that the proposed algorithm has good security and robustness, and can realize the secure communication for different signals.

    Mathematics Subject Classification: 78A60.


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  • Figure 1.  Optical chaotic self-synchronization model based on space laser communication

    Figure 2.  Optical chaotic secure communication structure based on erbium-doped fiber single-ring laser

    Figure 3.  Optical chaotic secure communication structure based on erbium-doped fiber double-ring laser

    Figure 4.  Time history of drive signal

    Figure 5.  Test result of sinusoidal signal secure communication

    Figure 6.  Test result of square wave signal secure communication

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