Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Researchers demonstrate co-propagation of quantum and classical signals: Study shows that quantum encryption can be implemented in existing fiber networks

The experimental set-up (Fig. 1) used for the co-propagation evaluation is constituted of a DWDM comb of sixty DP-QPSK (Dual Polarization Quadrature Phase Shift Keying) channels at 100 Gb/s ranged from 1533.6 to 1557 nm (with 50 GHz spacing) and sent to the Aux input (Rx) of the Alice side terminal.

CREDIT
Orange Innovation division in France
The experimental set-up (Fig. 1) used for the co-propagation evaluation is constituted of a DWDM comb of sixty DP-QPSK (Dual Polarization Quadrature Phase Shift Keying) channels at 100 Gb/s ranged from 1533.6 to 1557 nm (with 50 GHz spacing) and sent to the Aux input (Rx) of the Alice side terminal. CREDIT Orange Innovation division in France

Abstract:
In a new study, researchers from Orange and Toshiba Europe show that a quantum data channel and classical optical signals can both propagate in the same fiber for several tens of kilometers with a low error rate. The new approach could reduce the cost of implementing quantum key distribution (QKD) for secure data transmission by allowing QKD to be used in already deployed networks.

Researchers demonstrate co-propagation of quantum and classical signals: Study shows that quantum encryption can be implemented in existing fiber networks

Washington, DC | Posted on January 20th, 2023

Erwan Pincemin from Orange Innovation division in France will present the new research at the Optical Fiber Communication Conference (OFC), which will take place 05 – 09 March 2023 in San Diego.

This work shows that we can have co-propagation of the quantum channel with WDM data channels in the same fiber without changing the engineering rules of the operational WDM links. The high secret key rate obtained in this configuration is very promising for the introduction of QKD in operator’s networks.”, says Paulette Gavignet, senior expert in optical communication at Orange.

QKD uses the quantum properties of light to generate secure random keys for encrypting and decrypting data. Although this approach offers an extremely secure way to encrypt data, widespread deployment has been hampered by the cost and constraints of converting existing networks to QKD-enabled systems. Attempts to transmit quantum signals over existing fiber networks usually suffer from high error rates due to scattering of the co-propagating light.

In the new work, researchers from Orange Innovation division in France and Toshiba Europe Ltd. in the UK evaluated a commercial multiplexed QKD system designed and built by Toshiba. To minimize the effects of scattering, they used a 1310-nm quantum channel to increase the spectral separation between the quantum channel and the QKD service channel as well as the multiplexed data channels. They also added high-extinction spectral filters and time-domain gating at the QKD receiver to isolate the quantum channel from the co-propagating signals and scattered light, which boosted the signal-to-noise ratio. The performance of each communication link was further optimized using automatic self-optimization routines that dynamically adjust various optical parameters.

The researchers tested the QKD system to see if it could be implemented on a wavelength-division multiplexing (WDM) link already deployed in the field and to determine how many WDM channels could be mixed with the QKD signal in a standard single-mode fiber. They found that co-propagation of a QKD quantum channel at 1310 nm using 60-channel WDM at 100 Gb/s produced a total data rate of 6 Tb/s. In addition, emission of a secure key with very high aggregated power was possible for both 50 km and 70 km fiber lengths. These results show that a commercial QKD system could be deployed on existing fully filled WDM links with 100 Gb/s and 400 Gb/s channels in data center interconnection applications.

The new results suggested that the number of channels and/or the total bit rate that co-propagate with the quantum channel are not the best parameters for evaluating the ability of classical and QKD channels to co-exist. Instead, the most important parameter was the WDM total power that co-propagates with the quantum channel. With this in mind, the researchers proposed a new figure of merit called co-propagation efficiency for evaluating the performance of classical and QKD signal co-propagation. Based on this metric, they determined that the new QKD implementation outperformed previous co-propagating experiments.

Registration Information

Registration is free for credentialed media and analysts. The registration includes in-person and virtual attendance. Digital assets are available for credentialed media. Learn more: OFC media room.

####

About Optica
Optica (formerly OSA), Advancing Optics and Photonics Worldwide, is the society dedicated to promoting the generation, application, archiving and dissemination of knowledge in the field. Founded in 1916, it is the leading organization for scientists, engineers, business professionals, students and others interested in the science of light. Optica’s renowned publications, meetings, online resources and in-person activities fuel discoveries, shape real-life applications and accelerate scientific, technical and educational achievement. Discover more at: Optica.org

About OFC

The 2023 Optical Fiber Communication Conference (OFC) is the premier conference and exhibition for optical communications and networking professionals. For more than 40 years, OFC has drawn attendees from all corners of the globe to meet and greet, teach and learn, make connections and move business forward. OFC includes dynamic business programming, an exhibition of global companies and high impact peer-reviewed research that, combined, showcase the trends and pulse of the entire optical networking and communications industry. OFC is managed by Optica (formerly OSA) and co-sponsored by IEEE Communications Society (IEEE/ComSoc), IEEE Photonics Society and Optica. OFC 2023, a hybrid conference, will take place 05 – 09 March 2023 in San Diego. Follow @OFCConference, learn more at OFC Community LinkedIn, and watch highlights on OFC YouTube.

For more information, please click here

Contacts:
Ashley Collier
Optica

Office: 202-416-1419

Copyright © Optica

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

Quantum Physics

Simulating magnetization in a Heisenberg quantum spin chain April 5th, 2024

With VECSELs towards the quantum internet Fraunhofer: IAF achieves record output power with VECSEL for quantum frequency converters April 5th, 2024

Chemical reactions can scramble quantum information as well as black holes April 5th, 2024

News and information

Simulating magnetization in a Heisenberg quantum spin chain April 5th, 2024

NRL charters Navy’s quantum inertial navigation path to reduce drift April 5th, 2024

Innovative sensing platform unlocks ultrahigh sensitivity in conventional sensors: Lan Yang and her team have developed new plug-and-play hardware to dramatically enhance the sensitivity of optical sensors April 5th, 2024

Discovery points path to flash-like memory for storing qubits: Rice find could hasten development of nonvolatile quantum memory April 5th, 2024

Good as gold - improving infectious disease testing with gold nanoparticles April 5th, 2024

Quantum communication

With VECSELs towards the quantum internet Fraunhofer: IAF achieves record output power with VECSEL for quantum frequency converters April 5th, 2024

HKUST researchers develop new integration technique for efficient coupling of III-V and silicon February 16th, 2024

Optical-fiber based single-photon light source at room temperature for next-generation quantum processing: Ytterbium-doped optical fibers are expected to pave the way for cost-effective quantum technologies November 3rd, 2023

Wireless/telecommunications/RF/Antennas/Microwaves

HKUST researchers develop new integration technique for efficient coupling of III-V and silicon February 16th, 2024

Optical-fiber based single-photon light source at room temperature for next-generation quantum processing: Ytterbium-doped optical fibers are expected to pave the way for cost-effective quantum technologies November 3rd, 2023

Possible Futures

Innovative sensing platform unlocks ultrahigh sensitivity in conventional sensors: Lan Yang and her team have developed new plug-and-play hardware to dramatically enhance the sensitivity of optical sensors April 5th, 2024

Discovery points path to flash-like memory for storing qubits: Rice find could hasten development of nonvolatile quantum memory April 5th, 2024

A simple, inexpensive way to make carbon atoms bind together: A Scripps Research team uncovers a cost-effective method for producing quaternary carbon molecules, which are critical for drug development April 5th, 2024

With VECSELs towards the quantum internet Fraunhofer: IAF achieves record output power with VECSEL for quantum frequency converters April 5th, 2024

Discoveries

A simple, inexpensive way to make carbon atoms bind together: A Scripps Research team uncovers a cost-effective method for producing quaternary carbon molecules, which are critical for drug development April 5th, 2024

Chemical reactions can scramble quantum information as well as black holes April 5th, 2024

New micromaterial releases nanoparticles that selectively destroy cancer cells April 5th, 2024

Utilizing palladium for addressing contact issues of buried oxide thin film transistors April 5th, 2024

Announcements

NRL charters Navy’s quantum inertial navigation path to reduce drift April 5th, 2024

Innovative sensing platform unlocks ultrahigh sensitivity in conventional sensors: Lan Yang and her team have developed new plug-and-play hardware to dramatically enhance the sensitivity of optical sensors April 5th, 2024

Discovery points path to flash-like memory for storing qubits: Rice find could hasten development of nonvolatile quantum memory April 5th, 2024

A simple, inexpensive way to make carbon atoms bind together: A Scripps Research team uncovers a cost-effective method for producing quaternary carbon molecules, which are critical for drug development April 5th, 2024

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Simulating magnetization in a Heisenberg quantum spin chain April 5th, 2024

Innovative sensing platform unlocks ultrahigh sensitivity in conventional sensors: Lan Yang and her team have developed new plug-and-play hardware to dramatically enhance the sensitivity of optical sensors April 5th, 2024

Discovery points path to flash-like memory for storing qubits: Rice find could hasten development of nonvolatile quantum memory April 5th, 2024

A simple, inexpensive way to make carbon atoms bind together: A Scripps Research team uncovers a cost-effective method for producing quaternary carbon molecules, which are critical for drug development April 5th, 2024

Events/Classes

CEA & Partners Present ‘Powerful Step Towards Industrialization’ Of Linear Si Quantum Dot Arrays Using FDSOI Material at VLSI Symposium: Invited paper reports 3-step characterization chain and resulting methodologies and metrics that accelerate learning, provide data on device pe June 17th, 2022

June Conference in Grenoble, France, to Explore Pathways to 6G Applications, Including ‘Internet of Senses’, Sustainability, Extended Reality & Digital Twin of Physical World: Organized by CEA-Leti, the Joint EuCNC and 6G Summit Sees Telecom Sector as an ‘Enabler for a Sustainabl June 1st, 2022

How a physicist aims to reduce the noise in quantum computing: NAU assistant professor Ryan Behunin received an NSF CAREER grant to study how to reduce the noise produced in the process of quantum computing, which will make it better and more practical April 1st, 2022

Could quantum technology be New Mexico’s next economic boon? Quantum New Mexico Coalition aims to establish state as national hub April 1st, 2022

Photonics/Optics/Lasers

With VECSELs towards the quantum internet Fraunhofer: IAF achieves record output power with VECSEL for quantum frequency converters April 5th, 2024

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024

Optically trapped quantum droplets of light can bind together to form macroscopic complexes March 8th, 2024

HKUST researchers develop new integration technique for efficient coupling of III-V and silicon February 16th, 2024

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project