Free space laser communication system based on quantum encryption

A technology of laser communication and quantum encryption, applied in the field of laser communication and data encryption

Active Publication Date: 2018-11-02
CHINA THREE GORGES UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The development of quantum computing technology itself also provides an idea for improving the security of communication systems. However, there is still a lack of communication technology with large communication volume, high security and good mobility in the market, especially a communication technology based on quantum computing. Encrypted Free Space Laser Communication System

Method used

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  • Free space laser communication system based on quantum encryption
  • Free space laser communication system based on quantum encryption

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Embodiment Construction

[0055] Such as figure 1 As shown, a free-space laser communication system based on quantum encryption includes a receiving module 101, a data decryption module 102, a computer module 103, a quantum key terminal 104, a data encryption module 105, a transmitting module 106, and an aiming mechanism 107.

[0056] The receiving module 101 is installed on the surface of the communication terminal, preferably a wide surface that is easy to receive laser signals, and is used for mutual conversion between digital signals and analog signals. The receiving module mainly includes an optical receiving antenna, an optical filter, and a photodetector. The optical receiving antenna mainly includes a lens or mirror, which focuses the received optical signal and then sends it to the optical detector. The optical detector amplifies the laser signal and restores it into an electrical signal, which is sent to the electrical receiver module for demodulation into the original information.

[0057]...

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PUM

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Abstract

The invention discloses a free space laser communication system based on quantum encryption. The system comprises a receiving module and a data decryption module, wherein the receiving module capturesa laser signal and a communication request signal, amplifies, processes and quantizes the laser signal through broadband amplification and pulse code modulation, codes the laser signal and then converts the laser signal into a digital signal. A computer module processes data, and then records communication node information and freely organizes a communication network according to a communicationrequest and transmits data to a data encryption module; a quantum key terminal obtains a quantum key, the data encryption module encrypts the data, and the encrypted data is transmitted to a counter party of communication through a transmitting module. A receiving party communication node obtains the quantum key through the quantum key terminal and decrypts the received data through the data decryption module, and further transmits the decrypted data to the computer module for processing. For the system provided by the invention, fixing communication nodes or paving electric cables/optical cables is not needed, and the system can perform long-distance transmission and avoid obstacles and bad weather regions.

Description

technical field [0001] The invention belongs to the fields of laser communication and data encryption, and specifically relates to a free-space laser communication system based on quantum encryption. Background technique [0002] Although the modern society is already an information society, various means of communication technology emerge in endlessly, mainly including optical fiber communication, digital microwave communication, satellite communication, mobile communication and so on. Optical fiber communication is a communication method that uses light waves as a carrier and optical fiber as a transmission medium to transmit information from one place to another. It is called "wired" optical communication. Free space laser communication technology, that is, fiber-free free optical communication technology, is an emerging technology that has emerged in recent years. Its principle is that the carrier optical signal uses the atmosphere as a transmission channel to complete p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04B10/70H04B10/11
CPCH04B10/11H04B10/70H04L9/0852
Inventor 蔡政英向征刘萍萍李均浩
Owner CHINA THREE GORGES UNIV
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