Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Chinese Journal of Lasers

Development of Synchronized Laser Discriminator in Quantum Key Distribution System

蔡文奇 Cai Wenqi, 陈腾云 Chen Tengyun, Hao Liang, 金革 Jin Ge

Published Jan 1, 2010• 0 citations
Publisher
DOI
10.3788/cjl20103703.0703

Related papers

Synchronized semiconductor lasers for secure key distribution

Atsushi Uchida, Hayato Koizumi, Izumi Kakesu +3 more

SPIE Newsroom•Nov 25, 2013•0 citations

Design of high-precision synchronization in quantum key distribution system

Xu Wan, Kehang Cui, Yuan Gao +3 more

A light synchronization scheme to solve the key problem of signal synchronization in quantum key distribution(QKD)system is proposed.At side of the transmitter,the field-programmable gate array (FPGA)chip produces a synchronization pulse sequence of certain pattern.The pulse sequence drives laser to transmit sync light through one fiber along with signal light to the receiver.The sync light reverts to sync pulse sequence through fast discrimination at side of the receiver,and the pulses are provided to the single-photon detector as gate after high-precision delay adjustment.Simultaneously,the receiver uses a high-frequency clock to sample the sync pulse sequence in FPGA for encoding,synchronizing the transmitter and receiver.The scheme has a high-precision,low-cost,high fault tolerance feature,and was successfully applied to metro quantum communication network.

Chinese Journal of Quantum Electronics•Jan 1, 2011•1 citation

Underwater reference-frame-independent quantum key distribution with polarization-encoding

Zhiqing Wu, Shanchuan Dong, 尚震 Zhen Shang +8 more

To address the challenges of frame drift and link interruptions in underwater quantum key distribution (QKD), we design a polarization-encoded reference-frame-independent quantum key distribution (RFI-QKD) system. Temporal coding of synchronized optical pulses combined with quantum signal discrimination enables the system to re-establish timing synchronization after a link interruption and resume key generation. With an average output photon number of 0.1, we experimentally demonstrate RFI-QKD over a 15.3 dB-loss channel, achieving a final key rate of 357 bps. Furthermore, over a 17 m underwater channel with an attenuation of 2.76 dB, the system attains a final key rate of 24.14 kbps.

Optics Express•Aug 11, 2026•0 citations

Synchronization Technique of Quantum Key Distribution System

和佳子 前田, Akio Tajima, Akihiro Tanaka +1 more

IEICE Technical Report; IEICE Tech. Rep.•May 16, 2005•0 citations

Application of FPGA-based SER/DES for quantum cryptography

Hong Zhang

At the long-distance quantum key distribution(QKD) experiments,high-speed quantum transmission is needed.In this paper,quantum transmission rate at 500 Mbit/s is fulfilled based on SER/DES module inside FPGA,and a time synchronization design between transmitter and receiver using a low frequency sync-pulse(2 MHz) is proposed.For the experiment′s requirements,signal discriminator,pseudo-random number generator,time synchronization and data coding are developed.This design has been applied successfully to build decoy-state based long-distance QKD experiment.

Journal of Optoelectronics·laser•Jan 1, 2010•0 citations

Quantum Key Distribution Using Dual-Wavelength Laser Diodes

Lin Gong-ru

International Conference on Solid State Devices and Materials (SSDM)•Sep 15, 2026•0 citations
A light synchronization scheme to solve the key problem of signal synchronization in quantum key distribution(QKD)system is proposed.At side of the transmitter,the field-programmable gate array (FPGA)chip produces a synchronization pulse sequence of certain pattern.The pulse sequence drives laser to transmit sync light through one fiber along with signal light to the receiver.The sync light reverts to sync pulse sequence through fast discrimination at side of the receiver,and the pulses are provided to the single-photon detector as gate after high-precision delay adjustment.Simultaneously,the receiver uses a high-frequency clock to sample the sync pulse sequence in FPGA for encoding,synchronizing the transmitter and receiver.The scheme has a high-precision,low-cost,high fault tolerance feature,and was successfully applied to metro quantum communication network.
To address the challenges of frame drift and link interruptions in underwater quantum key distribution (QKD), we design a polarization-encoded reference-frame-independent quantum key distribution (RFI-QKD) system. Temporal coding of synchronized optical pulses combined with quantum signal discrimination enables the system to re-establish timing synchronization after a link interruption and resume key generation. With an average output photon number of 0.1, we experimentally demonstrate RFI-QKD over a 15.3 dB-loss channel, achieving a final key rate of 357 bps. Furthermore, over a 17 m underwater channel with an attenuation of 2.76 dB, the system attains a final key rate of 24.14 kbps.
At the long-distance quantum key distribution(QKD) experiments,high-speed quantum transmission is needed.In this paper,quantum transmission rate at 500 Mbit/s is fulfilled based on SER/DES module inside FPGA,and a time synchronization design between transmitter and receiver using a low frequency sync-pulse(2 MHz) is proposed.For the experiment′s requirements,signal discriminator,pseudo-random number generator,time synchronization and data coding are developed.This design has been applied successfully to build decoy-state based long-distance QKD experiment.