Multi-core optical fiber transmission method based on high-dimensional constellation multistage encryption

Abstract

The invention relates to the technical field of optical transmission, and discloses a multi-core optical fiber transmission method based on high-dimensional constellation multi-level encryption, which comprises the following steps of: 1) performing off-line digital signal processing on original data to generate an encrypted signal, and importing the encrypted signal into an arbitrary waveform generator to perform digital-to-analog conversion at 25GSa / s; and 2) amplifying the radio frequency signal through an electric amplifier before the radio frequency signal is injected into the Mach-Zehnder modulator for intensity modulation. According to the multi-core optical fiber transmission method based on high-dimensional constellation multistage encryption, a spherical encryption high-security optical transmission method is designed, so that signals on a transmission channel have a property similar to random noise, the purpose of information encryption is achieved, the difficulty of stealing information by an illegal ONU is greatly improved, and the security of the ONU is improved. Therefore, the overall safety of optical network transmission is improved, and meanwhile, the seven-core optical fiber is adopted for transmission, so that the transmission capacity is greatly improved.

Description

technical field [0001] The invention relates to the technical field of optical transmission, in particular to a multi-core optical fiber transmission method based on high-dimensional constellation multi-level encryption. Background technique [0002] With the rapid rise of bandwidth-intensive services such as 5G, Internet of Things (loT), and cloud computing, the surge in network devices and applications consumes a lot of bandwidth, and the demand for high-speed Internet and high-capacity networks is growing exponentially. To better solve the problem of capacity demand, short-distance optical fiber communication aims at more flexible access, higher-speed interconnection, and lower system cost. Pulse amplitude modulation (PAM), discrete multi-tone modulation (DMT) and carrierless Amplitude-phase modulation (CAP) and other advanced modulation formats have been widely studied. Constellation shaping technology is an effective means to further approach the limit of channel capaci...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a multi-core optical fiber transmission method based on high-dimensional constellation multi-level encryption, which has the advantages of improving the overall security of optical network transmission, and solves the problem of traditional transmission layer or protocol stack layer encryption. The method can be identified and deciphered by machine learning, but it cannot fundamentally provide guarantee for the security of the communication transmission system

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