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全光加密技术是解决目前光纤通信网的加解密速率瓶颈及物理层潜在的安全威胁的有力保证。针对现有全光异或加解密方案工作速率普遍较低的问题,在传统的SOA-MZI型全光异或门的基础上,利用两段色散互补的G.655单模光纤,并结合一个相位偏移器设计了一种改进型SOA-MZI全光异或方案,以该改进方案作为全光安全处理器在OptiSystem7.0仿真平台上搭建新的全光异或加解密方案,对输入信号比特速率分别为10Gb/s和40Gb/s的加解密方案进行了仿真实验验证。结果表明:基于改进型SOA-MIZ全光异或门的加解密方案可将全光异或加解密速率提高到40Gb/s,并且解密恢复出的明文数据的消光比约可以达到20dB,最大Q值约为25.7,加解密过程不会对通信系统引入额外误码。
All-optical encryption technology is to solve the current optical fiber communication network encryption and decryption rate bottlenecks and physical layer potential security threats a strong guarantee. Based on the traditional SOA-MZI all-optical XOR gate, the G.655 single-mode optical fiber with two complementary chromatic dispersion is used in combination with the problem that the working speed of the existing all-optical XOR-X encryption and decryption scheme is generally low. The phase shifter designs an improved SOA-MZI all-optical XOR scheme. With the improved scheme as an all-optical security processor, a new all-optical XOR encryption and decryption scheme is built on the OptiSystem7.0 simulation platform. The input signal The bit rate of 10Gb / s and 40Gb / s encryption and decryption programs were simulated experimentally. The results show that the encryption and decryption scheme based on the improved SOA-MIZ all-optical XOR gate can increase the all-optical XOR encryption and decryption rate to 40Gb / s, and the extinction ratio of recovered plaintext data can reach about 20dB. The maximum Q The value is about 25.7, encryption and decryption process does not introduce additional error code to the communication system.