Optical chaotic communication system based on mutual phase modulation-shift keying

Aiming at the complex structure and low transmission rate of traditional chaotic-shift-keying (CSK) systems, an optical chaotic communication system based on mutual phase modulation-shift keying is proposed in this paper, and the successful transmission of 25Gb/s keying information over a 100km optical fiber link is proved by simulation. In this scheme, the method of mutual phase modulation-shift keying simplifies the complex structure of the traditional CSK system, which must be equipped with two identical hardware modules in the transmitter, and at the same time, overcomes the disadvantage of the traditional CSK system, which is vulnerable to return map attacks. Moreover, the co-driven structure is used to ensure high-quality chaotic carrier synchronization between the transmitter and the receiver, and a 10 -6 level bit error rate (BER) is achieved for decryption. In addition, the superiority of the system performance is proved by analyzing indicators such as parameter mismatch and bit error rate.