OAM entanglement modulation key distribution network system and method with real-time tracking compensation

A key distribution and real-time tracking technology, applied in key distribution, can solve problems such as inability to separate OAM

Pending Publication Date: 2020-05-08
GUANGDONG INCUBATOR TECH DEV CO LTD
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Problems solved by technology

However, other current quantum key distribution schemes cannot separate any OAM, so that it can be input to any user of the Bob client

Method used

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  • OAM entanglement modulation key distribution network system and method with real-time tracking compensation
  • OAM entanglement modulation key distribution network system and method with real-time tracking compensation
  • OAM entanglement modulation key distribution network system and method with real-time tracking compensation

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Embodiment Construction

[0071] The following is attached Figure 1-6 The specific embodiment of the present invention is described further:

[0072] Refer to attached figure 1 As shown, a real-time tracking compensation OAM entanglement modulation key distribution network system, the system includes Alice control end, M-Z type multiplexing module, and Bob user end. The Alice control terminal includes an OAM-OAM entanglement generation unit, a modulation unit and a coincidence measurement unit;

[0073] Refer to attached figure 2 As shown, the Alice control terminal includes an OAM-OAM entanglement generation unit 1, an OAM modulation unit 4, and a coincidence measurement unit 6; wherein the OAM entanglement generation unit 1 includes a pump light source LD, a lens 101, a BBO crystal 102, a first A total reflection mirror 103 , a second total reflection mirror 104 ; the pumping light source LD is a laser 100 .

[0074] The OAM modulation unit 4 includes a first beam splitter 401, a first charge-c...

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Abstract

The invention provides an OAM entanglement modulation key distribution network system with real-time tracking compensation. The OAM entanglement modulation key distribution network system comprises anOAM-OAM entanglement generation unit, a first multiplexing module, a second multiplexing module, an OAM modulation unit, a Bob client and a coincidence measurement unit, wherein the OAM-OAM entanglement generation unit is used for generating an orbital angular momentum and an orbital angular momentum mixed entanglement quantum state; the first multiplexing module and the second multiplexing module are used for separating any OAM state; the OAM modulation unit is used for carrying out phase deflection modulation on the orbital angular momentum and loading coding information; and the coincidence measurement unit is used for performing coincidence measurement on signal light and idle light to decode the quantum bit information. According to the invention, the security of the quantum key distribution system is improved; an adaptive optical system is introduced, phase distortion caused by atmospheric turbulence is reduced, and the mode consistency during OAM light interference is guaranteed; an M-Z interferometer is used for separating any OAM, the quantum coding capacity is expanded, and an efficiently coded quantum key distribution system is obtained; and the engineering applicationrange is wide, the structure is simple, and the expandability is high.

Description

technical field [0001] The invention relates to the field of free space communication and quantum communication network, in particular to a real-time tracking compensation OAM entanglement modulation key distribution network system and method. Background technique [0002] The security of traditional cryptography depends on the computational complexity of mathematics. Computers with powerful computing capabilities play an extremely important role in cracking passwords. With the current advancement and improvement of computing capabilities, the security of traditional cryptography is under great threat. The security source of Quantum Key Distribution (QKD) relies on physical principles rather than the complexity of solving mathematical problems. Therefore, in theory, no amount of computing resources can effectively help eavesdroppers to crack the key, so QKD has theoretical unconditional security. In short, the security of QKD comes from two properties of quantum mechanics: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04B10/70
CPCH04B10/70H04L9/0852H04L9/0858
Inventor 郭邦红曾炎颖胡敏
Owner GUANGDONG INCUBATOR TECH DEV CO LTD
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