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Quantum key distribution device capable of configuring multiple protocols

A quantum key distribution and protocol technology, applied in the field of quantum communication, can solve problems such as low efficiency and device waste, and achieve the effect of saving devices

Active Publication Date: 2021-03-05
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a solution will result in waste of devices, and the efficiency is not high.

Method used

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  • Quantum key distribution device capable of configuring multiple protocols
  • Quantum key distribution device capable of configuring multiple protocols
  • Quantum key distribution device capable of configuring multiple protocols

Examples

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Embodiment Construction

[0035] A quantum key distribution device of the present invention that can be configured with multiple protocols includes a sending end, a receiving end, and a communication channel for connecting the sending end and the receiving end; in the present invention, the communication channel connecting the sending end and the receiving end is an optical fiber.

[0036] Such as figure 1 As shown, the transmitting end includes a transmitting end main control board, a laser, an intensity modulator IM1, an F-M interference ring at the transmitting end, a first photoelectric cell, a second photoelectric cell, a synchronous laser, an intensity modulator IM2, an optical attenuator, a transmitting Terminal Sagnac ring and wavelength division multiplexing module; the dotted line in the figure indicates the circuit connection, and the solid line indicates the optical path connection.

[0037] The main control board at the sending end outputs electrical signals to the laser. The output end of...

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Abstract

The invention relates to the field of quantum communication, in particular to a quantum key distribution device capable of configuring multiple protocols, which utilizes a simplified Faraday Michelsoninterference ring combined with an intensity modulator to finish timestamp coding in a chopping mode. Phase modulation is completed through a Sagnac ring device composed of a single-polarization phase modulator, a polarization beam splitter and a Faraday rotator, so that the purpose of composite encoding and decoding is achieved, and the quantum key distribution device capable of configuring multiple protocols and multiple decoy state schemes is achieved. The device can be compatible with various protocols including a BB84 protocol, a reference system independent protocol, a six-state protocol, a SARG protocol and the like, and has the characteristics of phase modulation polarization independence, low system complexity and the like.

Description

technical field [0001] The invention relates to the field of quantum communication, in particular to a quantum key distribution device capable of configuring multiple protocols. Background technique [0002] In 1984, the proposal of the BB84 protocol marked the official establishment of quantum cryptography. After a period of time, various quantum key distribution QKD protocols continued to emerge. In 1991, A.Ekert and others proposed the E91 protocol based on the characteristics of quantum entanglement. Since the preparation technology of entangled photon pairs is still immature, its practical application is not strong. Then in 1992, Bennet proposed the B92 protocol using two sets of non-orthogonal basis codes. In 1998, someone proposed a six-state protocol for three-orthogonal-state encoding. Since then, protocols such as SARG protocol, continuous variable protocol, reference frame-independent RFI protocol, differential phase protocol, counter-intuitive protocol, and P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04B10/70H04L29/06
CPCH04L9/0852H04B10/70H04L9/0858H04L69/18G06N10/60
Inventor 王琴蒋庆庆丁华建张春辉李剑
Owner NANJING UNIV OF POSTS & TELECOMM
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