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

Journal of Physics Conference Series

Implementation of multiplexing in a subcarrier-wave quantum cryptography system

Vladimir Chistiakov, Artur V. Gleim, V. I. Egorov, Yu V Nazarov

Published Oct 27, 2014• 2 citations
Publisher

Abstract

Quantum cryptography allows distributing secure keys in a way that any eavesdropping in the channel is inevitably detected. This work is dedicated to introducing wavelength division multiplexing in a subcarrier-wave quantum cryptography system. Compared to other existing schemes, the resulting device is able to achieve higher bitrates (up to 2.26 Mbit/s at 20 km), is robust against external conditions and compatible with standard telecommunication fibres in multi-user environment.

DOI
10.1088/1742-6596/541/1/012078

Related papers

High-speed wavelength-division multiplexing quantum key distribution system

K. Yoshino, Mikio Fujiwara, Akihiro Tanaka +8 more

A high-speed quantum key distribution system was developed with the wavelength-division multiplexing (WDM) technique and dedicated key distillation hardware engines. Two interferometers for encoding and decoding are shared over eight wavelengths to reduce the system's size, cost, and control complexity. The key distillation engines can process a huge amount of data from the WDM channels by using a 1 Mbit block in real time. We demonstrated a three-channel WDM system that simultaneously uses avalanche photodiodes and superconducting single-photon detectors. We achieved 12 h continuous key generation with a secure key rate of 208 kilobits per second through a 45 km field fiber with 14.5 dB loss.

Optics Letters•Jan 13, 2012•80 citations

Simultaneous quantum cryptographic key distributionand conventional data transmission over installed fibre using wavelength-divisionmultiplexing

Paul D. Townsend

Wavelength division multiplexing (WDM) is used to add a secure quantum key distribution channel (λ = 1300 nm) to a conventional 1.2 Gbit/s data channel (λ ~1550 nm) operating over 28 km of installed fibre in BT's London and East Anglia multi-service network testbed (LEANET). Error-free operation of the data channel is demonstrated with no degradation of the quantum channel performance.

Electronics Letters•Jan 30, 1997•193 citations

Multi-User Quantum Key Distribution Using Wavelength Division Multiplexing

P. Lokesh Kumar Reddy, B. Rama Bhupal Reddy, S. Rama Krishna

Quantum cryptography, exclusively known as Quantum key distribution (QKD), has attracted a lot of attention in the recent years with the discovery that it can provide absolute secrecy for communications.We report a new architecture for constructing a fiber-based network of quantum key distribution using optical wavelength division multiplexing in the fiber, and also using some wavelength protocols.The advantages are discussed in detail for demonstrating the experimental report in the way of feasibility for the proposed architecture.

International Journal of Computer Network and Information Security•Jun 26, 2012•6 citations

Multiplexed Classical and Quantum Transmission for High Bitrate Quantum Key Distribution Systems

Ketaki A. Patel, J. F. Dynes, Iris Choi +5 more

We report the operation of a gigahertz clocked quantum key distribution system, with two classical data communication channels using coarse wavelength division multiplexing over a record fibre distance of 80km.

Conference on Lasers and Electro-Optics•Jan 1, 2012•1 citation

Experimental demonstration of subcarrier multiplexed quantum key distribution system

Jose Mora, A. Ruiz-Alba, Waldimar Amaya +4 more

We provide, to our knowledge, the first experimental demonstration of the feasibility of sending several parallel keys by exploiting the technique of subcarrier multiplexing (SCM) widely employed in microwave photonics. This approach brings several advantages such as high spectral efficiency compatible with the actual secure key rates, the sharing of the optical fainted pulse by all the quantum multiplexed channels reducing the system complexity, and the possibility of upgrading with wavelength division multiplexing in a two-tier scheme, to increase the number of parallel keys. Two independent quantum SCM channels featuring a sifted key rate of 10 Kb/s/channel over a link with quantum bit error rate <2% is reported.

Optics Letters•May 29, 2012•36 citations

Quantum key distribution network with wavelength addressing

Xiaofan Mo, Tao Zhang, Xu, Fang-Xing +2 more

Most traditional applications of quantum cryptography are point-to-point communications, in which only two users can exchange keys. In this letter, we present a network scheme that enable quantum key distribution between multi-user with wavelength addressing. Considering the current state of wavelength division multiplexing technique, dozens or hundreds of users can be connected to such a network and directly exchange keys with each other. With the scheme, a 4-user demonstration network was built up and key exchanges were performed.

arXiv:quant-ph/0610096•Oct 12, 2006•0 citations
Quantum cryptography allows distributing secure keys in a way that any eavesdropping in the channel is inevitably detected. This work is dedicated to introducing wavelength division multiplexing in a subcarrier-wave quantum cryptography system. Compared to other existing schemes, the resulting device is able to achieve higher bitrates (up to 2.26 Mbit/s at 20 km), is robust against external conditions and compatible with standard telecommunication fibres in multi-user environment.
A high-speed quantum key distribution system was developed with the wavelength-division multiplexing (WDM) technique and dedicated key distillation hardware engines. Two interferometers for encoding and decoding are shared over eight wavelengths to reduce the system's size, cost, and control complexity. The key distillation engines can process a huge amount of data from the WDM channels by using a 1 Mbit block in real time. We demonstrated a three-channel WDM system that simultaneously uses avalanche photodiodes and superconducting single-photon detectors. We achieved 12 h continuous key generation with a secure key rate of 208 kilobits per second through a 45 km field fiber with 14.5 dB loss.
Quantum cryptography, exclusively known as Quantum key distribution (QKD), has attracted a lot of attention in the recent years with the discovery that it can provide absolute secrecy for communications.We report a new architecture for constructing a fiber-based network of quantum key distribution using optical wavelength division multiplexing in the fiber, and also using some wavelength protocols.The advantages are discussed in detail for demonstrating the experimental report in the way of feasibility for the proposed architecture.
We provide, to our knowledge, the first experimental demonstration of the feasibility of sending several parallel keys by exploiting the technique of subcarrier multiplexing (SCM) widely employed in microwave photonics. This approach brings several advantages such as high spectral efficiency compatible with the actual secure key rates, the sharing of the optical fainted pulse by all the quantum multiplexed channels reducing the system complexity, and the possibility of upgrading with wavelength division multiplexing in a two-tier scheme, to increase the number of parallel keys. Two independent quantum SCM channels featuring a sifted key rate of 10 Kb/s/channel over a link with quantum bit error rate <2% is reported.
Most traditional applications of quantum cryptography are point-to-point communications, in which only two users can exchange keys. In this letter, we present a network scheme that enable quantum key distribution between multi-user with wavelength addressing. Considering the current state of wavelength division multiplexing technique, dozens or hundreds of users can be connected to such a network and directly exchange keys with each other. With the scheme, a 4-user demonstration network was built up and key exchanges were performed.