Multi-degree-of-freedom quantum key distribution silicon-based transmitting end chip

A quantum key distribution and transmitter technology, applied in the field of quantum information, can solve the problems of single coding method, lack of monitoring, poor security, etc., and achieve the effect of improving flexibility, improving production tolerance, and improving security.

Pending Publication Date: 2021-12-14
GUANGXI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The encoding method is single and the application area is narrow
Lack of certain monitoring, poor security

Method used

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  • Multi-degree-of-freedom quantum key distribution silicon-based transmitting end chip
  • Multi-degree-of-freedom quantum key distribution silicon-based transmitting end chip
  • Multi-degree-of-freedom quantum key distribution silicon-based transmitting end chip

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] figure 1 It shows the structural diagram of the multi-freedom quantum key distribution silicon-based transmitter chip provided by Embodiment 1 of the present invention, as shown in figure 1 As shown, the multi-freedom quantum key distribution silicon-based transmitter chip of the present invention includes an intensity compensation module 1, a third multimode interference coupler 7, a decoy state intensity modulation module 2, an optical switch module 3, a phase encoding module 4, Polarization encoding module 6, attenuation monitoring module 5 and synchronization optical path.

[0039] The intensity compensation module 1 is connected to the third multimode interference coupler 7, the third multimode interference coupler 7 is connected to the decoy state intensity modulation module 2, the decoy state intensity modulation module 2 is connected to the optical switch module 3, and the optical switch modules 3 are respectively It is connected with the phase encoding module ...

Embodiment 2

[0056] Embodiment 2 Integrated Time Phase Encoding QKD System Transmitter Solution

[0057]Step S1, adjust the optical switch module 3, choose to make all the light energy pass through the phase encoding module 4, and adjust the delay line module 410 according to the clock frequency of the system to match the corresponding delay line;

[0058] Step S2, the pulsed light sent by the off-chip laser is coupled into the waveguide through the first fiber coupler 11, and then the intensity of the signal light is initially modulated through the intensity compensation module 1;

[0059] Step S3, the signal light primary modulated by the intensity compensation module 1 enters the decoy state intensity modulation module 2, and adjusts the first variable optical attenuator 203, the second variable optical attenuator 206 and the third variable optical attenuator 209 , adjust the splitting ratio of the three optical arms, and satisfy the condition (1) condition(2) condition(3) Here, a...

Embodiment 3

[0066] Embodiment 3 Integrated Polarization Coded QKD System Transmitter Solution

[0067] Step S1, adjusting the optical switch module 3, selecting to make all the light energy pass through the polarization encoding module 6;

[0068] Step S2, the pulsed light sent by the off-chip laser is coupled into the waveguide through the first fiber coupler 11, and then the intensity of the signal light is initially modulated through the intensity compensation module 1;

[0069] Step S3, the signal light primary modulated by the intensity compensation module 1 enters the decoy state intensity modulation module 2, and firstly adjusts the first variable optical attenuator 203, the second variable optical attenuator 206 and the third variable optical attenuator 209 controls the splitting ratio of the three arms, satisfying the condition (1) condition(2) condition(3) Here, according to the specific needs of the experiment, generally speaking, the intensity modulation of the decoy sta...

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PUM

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Abstract

The invention relates to a multi-degree-of-freedom quantum key distribution silicon-based transmitting end chip which comprises an intensity compensation module, a third multi-mode interference coupler, a decoy state intensity modulation module, an optical switch module, a phase encoding module, a polarization encoding module, an attenuation monitoring module and a synchronous optical path, wherein the intensity compensation module is connected with the third multi-mode interference coupler, the third multi-mode interference coupler is connected with the decoy state intensity modulation module, the decoy state intensity modulation module is connected with the optical switch module, the optical switch module is connected with the phase encoding module and the polarization encoding module respectively, and the phase encoding module is connected with the attenuation monitoring module. The phase encoding module and the polarization encoding module are integrated on one chip at the same time, thus stable and safe multi-intensity modulation can be achieved, and multiple encoding modes are achieved.

Description

technical field [0001] The invention relates to the technical field of quantum information, in particular to a multi-freedom quantum key distribution silicon-based transmitter chip. 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. With the development of emerging technologies such as quantum computing, the traditional communication system will be greatly tested, and quantum communication based on the principle of quantum uncertainty and the principle of non-cloning can theoretically achieve unconditional security of communication. At present, the commonly used method and idea of ​​quantum communication is quantum key distribution (Quantumkey distribution, QKD) technology, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04B10/70H04B10/516
CPCH04L9/0852H04L9/0858H04B10/70H04B10/5161
Inventor 韦克金杜永强赵震庚张振荣余宇刘巍石洋
Owner GUANGXI UNIV
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