Pulse modulation device, transmitter, system and method for CV-QKD

A CV-QKD, pulse modulation technology, applied in the field of quantum communication, can solve the problem of poor spectral quality of pulsed light, and achieve the effect of reducing difficulty, cost and good spectral quality.

Active Publication Date: 2021-03-09
BEIJING ZHONGCHUANGWEI NANJING QUANTUM COMM TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present application provides a pulse modulation device, transmitter, system and method for CV-QKD to solve the problem of poor spectral quality of pulsed light obtained by pulse modulation devices in the prior art

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  • Pulse modulation device, transmitter, system and method for CV-QKD
  • Pulse modulation device, transmitter, system and method for CV-QKD
  • Pulse modulation device, transmitter, system and method for CV-QKD

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Embodiment Construction

[0029] In order to make the above objects, features and advantages of the present application more obvious and comprehensible, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] The first aspect of the present application provides a CV-QKD system, including a transmitter and a receiver, wherein the receiver adopts the quantum key transmitter according to claim 9 . A pulse modulation device for CV-QKD, the structure of the pulse modulation device can be referred to image 3As shown in the schematic diagram, the pulse modulation device includes a fir...

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Abstract

The invention provides a pulse modulation device, transmitter, system and method for CV-QKD, and the device comprises a first pulse laser, a second pulse laser, a third pulse laser, an optical beam splitter, a first optical circulator, a second optical circulator, an optical modulation module, and a polarization beam combiner. The pulse light output by the first pulse laser is divided into a firstlight pulse and a second light pulse, the first light pulse is injected into the second pulse laser, and the second light pulse is injected into the third pulse laser, so that the second pulse laserand the third pulse laser emit same-frequency and same-phase pulses; and the manufactured reference light and signal light are good in spectral quality, and pulses with high extinction ratio can be obtained without a cascaded AM mode, so that the difficulty of obtaining pulse modulation is reduced, in addition, at least more than two high-performance AMs of a chopping scheme are saved, and the cost of pulse modulation is greatly reduced.

Description

technical field [0001] The present application relates to the technical field of quantum communication, in particular to a pulse modulation device, transmitter, system and method for CV-QKD. Background technique [0002] Quantum key distribution (QKD) uses the quantum properties of matter (such as photons) to design encryption and decryption schemes. Its security is based on the basic principles of quantum mechanics rather than the complexity of mathematical calculations. QKD uses the Heisenberg uncertainty principle and the unknown quantum state non-cloning principle to discover the existence of eavesdropping, which theoretically ensures the unconditional security of information. [0003] Among them, QKD can be divided into discrete variable quantum key distribution (DV-QKD) and continuous variable quantum key distribution (CV-QKD) according to different modulation methods and detection methods. Among them, there is an existing pulse modulation device for CV-QKD such as f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04B10/50H04B10/516H04B10/70
CPCH04B10/503H04B10/5161H04B10/70H04L9/0852H04L9/0855H04L9/0858
Inventor 陈建刘鹏
Owner BEIJING ZHONGCHUANGWEI NANJING QUANTUM COMM TECH CO LTD
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