Quantum key allocation system and method based on waveguide interference ring

Abstract

The invention discloses a quantum key allocation system and method based on waveguide interference rings. A polarization beam splitter is increased at a receiving end, so signal light is split into two vertical polarization states. The interference under the polarization states are finished through utilization of polarization-maintaining optical fiber interference rings, so relatively good interference results are achieved, a correction system is abandoned, the system redundancy is simplified and production costs are reduced. A phase is adjusted only by one interference ring and demands for a DAC and an analogue amplifier are only 10<-6> magnitude of the demands in an existing mode, so system design demands are greatly reduced. Moreover, according to the system and the method, through adoption of the reference rings made of planar optical waveguides and the planar optical waveguides are polarization insensitive, so an extra polarization compensation method does not need to be carried out in the system. The traditional optical fiber interference rings are mainly made manually and the production technology is relatively complex. The production technology of the waveguides is every mature and a submicron order can be achieved, so a key code rate of the system is improved well.

Description

technical field [0001] The invention relates to the technical field of optical transmission security communication, in particular to a quantum key distribution system and method based on a waveguide interference ring. Background technique [0002] With the widespread popularization of the Internet, information transmission among human beings has reached an unprecedented quantity and frequency, and various private information is increasingly exposed on the Internet. Therefore, human beings' demand for confidential communication has also reached an unprecedented height. The current Internet information security encryption method is called "public key" cryptography system. Its principle is to generate a public key that spreads on the network and a private key that stays inside the computer through an encryption algorithm. The two keys must match Use to achieve a complete encryption and decryption process. [0003] The encryption standard used by the modern Internet is the RSA ...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a quantum key distribution system and method based on a waveguide interference ring to solve the problem that the quantum key distribution system in the prior art needs to add a deviation correction system and polarization compensation technology in order to improve the key generation efficiency, so that the system Technical flaws that increase complexity and increase production costs

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