Continuous variable quantum key distribution system based on Faraday-Michelson interference

A technology of quantum key distribution and Faraday rotation mirror, applied in key distribution, can solve problems such as instability of key distribution system, achieve long-distance stable quantum key distribution, improve stability, and be less prone to polarization interference.

Active Publication Date: 2016-08-24
ANHUI QASKY QUANTUM SCI & TECH CO LTD
View PDF4 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art and provide a continuous variable quantum key distribution system based on Faraday-Michelson

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Continuous variable quantum key distribution system based on Faraday-Michelson interference
  • Continuous variable quantum key distribution system based on Faraday-Michelson interference

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] see figure 1 and figure 2 , which is based on the Faraday-Michelson interference continuous variable quantum key distribution system, including a transmitter, a communication channel and a receiver; the output of the transmitter is connected to the input of the communication channel, and the output of the communication channel is connected to the input of the receiver.

[0040] The transmitting end includes a light source module and a modulation module, and the output end of the light source module is connected to the input end of the modulation module; the light source module includes a continuous laser Laser, an amplitude modulator AM1 and an isolator ISO connected in sequence; the continuous laser Laser is used to generate the desired wavelength. Continuous laser, the amplitude modulator AM1 is used to control the output optical parameters of the laser Laser; the output light of the amplitude modulator AM1 is connected to the input end of the isolator ISO; the other...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a continuous variable quantum key distribution system based on Faraday-Michelson interference. A transmitting end is used for generating a pulse light source which is in accordance with the parameters such as repetition frequency, pulse width and so on, and modulating regular components X and P of a signal light; a communication channel is a light propagation channel, and used for transmitting the signal light modulated by the transmitting end and an unmodulated local oscillation light to a receiving end; a receiving end demodulation module realizes measurement and component selection: X or P; and a receiving end zero-difference detection module is used for performing detection processing, and acquiring modulation information data of a signal. The continuous variable quantum key distribution system based on the Faraday-Michelson interference provided by the invention introduces two unequal-arm Faraday-Michelson interference rings, and with the help of a Faraday polarization rotating mirror, the polarization scrambling in a pulse round trip process can be self-compensated, which is beneficial to improving the stability of the system and not easily interfered by polarization; and besides, long distance stable quantum key distribution can be realized in combination with an existing detection technology and a post-processing algorithm.

Description

technical field [0001] The invention relates to a quantum key distribution scheme, in particular to a Faraday-Michelson interference continuous variable quantum key distribution system. Background technique [0002] Since the idea of ​​using continuous variable quantum key distribution (CVQKD) to realize quantum communication was proposed in 1999, CVQKD has attracted the attention of many scholars. Compared with the well-researched discrete variable quantum key distribution DVQKD. CVQKD gets rid of the constraints of single-photon source and low detection efficiency in the 1550nm band. It adopts strong light communication with the same intensity as classical light, and uses mature homodyne detectors in traditional communication for measurement, enabling higher key generation rate and Integration with traditional optical networks has become possible. [0003] In 2002, the CVQKD protocol based on Gaussian modulation was proposed. Subsequently, the unconditional security of t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04L9/08
CPCH04L9/0819H04L9/0858
Inventor 宋红岩赵义博郝鹏磊刘云苗春华
Owner ANHUI QASKY QUANTUM SCI & TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap