A Quantum Communication System

Abstract

The present application provides a quantum communication system, including: a light source module for sending out pulses containing multiple different frequency components, and a sender coding module for dividing pulses at the same operating frequency into a pulse to be coded and a reference pulse, and a pulse to be coded Perform phase encoding to obtain the encoded pulse; and transmit the reference pulse and the encoded pulse to the decoding module of the receiving side; the decoding module of the receiving side is used to perform phase decoding on the encoded pulse to obtain the decoded pulse; the data reading module of the receiving side is used to read the decoded pulse and The same frequency pulse interference is performed on the reference pulse, and the communication data is obtained based on the interference result. Due to the introduction of pulses of different frequencies as information carriers in this application, the amount of information carried by a single information bit has been effectively increased, communication efficiency has been improved, and the sensitivity of the quantum communication system to the relative phase of adjacent pulses has been weakened, enabling effective communication The distance has been significantly increased.

Description

technical field [0001] The invention relates to the technical field of quantum communication, and more specifically, to a quantum communication system. Background technique [0002] Quantum communication has the characteristics of fast communication speed, low signal-to-noise ratio requirements, eavesdropping and good communication confidentiality, and has important applications in many fields such as state agencies, military defense, and financial securities. [0003] At present, the quantum communication system is mainly built by independent optical fiber devices on the optical platform. The system usually has large volume, high energy consumption, short communication distance, easy information leakage, slow encoding and decoding speed, low coding rate and poor stability. Insufficient, not suitable for the development of quantum communication in the future. [0004] Although the use of silicon-based optoelectronic integration technology to integrate discrete devices into ...

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Problems solved by technology

[0003] At present, the quantum communication system is mainly built by independent optical fiber devices on the optical platform. The system usually has large volume, high energy consumption, short communication distance, easy information leakage, slow encoding and decoding speed, low coding rate and poor stability. Insufficient, not suitable for the development of future quantum communication

[0004] Although the use of silicon-based optoelectronic integration technology to integrate discrete devices into quantum communication chips can greatly optimize the system in terms of volume, energy consumption, security, and stability; however, the current quantum communication system still generally has a single information bit. The shortcomings of carrying less information, low communication efficiency, difficulty in controlling the relative phase of adjacent pulses, and short effective communication distance

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