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

Optical Fiber Communication Conference

Coexistence Transmission of 33.4-Tb/s O-band Coherent Classical Channels and a C-band QKD Channel over 80 km

Shohei Beppu, Daniel J. Elson, Shinya Murai, Akira Murakami, Hiroki Yamamuro, Yuta Wakayama, Noboru Yoshikane, Takehiro Tsuritani

Published Jan 1, 2025• 7 citations
Publisher

Abstract

A record data transmission capacity of 33.4 Tb/s over 80 km is achieved in quantum-classical channel coexistence transmission by multiplexing 13.1-THz O-band coherent classical channels with a C-band DV-QKD channel. © 2025 The Author(s)
DOI
10.1364/ofc.2025.tu3d.2

Related papers

39.5- Tb/s O-band Coherent Data Channels Coexistence with C-band DV-QKD and Bidirectional Service Channels

Shohei Beppu, Daniel J. Elson, Shinya Murai +7 more

We multiplex a C-band discrete-variable quantum key distribution (DV-QKD), C-band bidirectional service channels for synchronization and key generation, and 39.5-Tb/s Q-band coherent data channels, transmitting them over a 71-km single mode fiber.

European Conference on Optical Communication•Sep 28, 2025•0 citations

Coexistence of Commercial DV-QKD with High-Capacity Super C+L-band Transmission in Amplified ROADM-based Links and Frequency Allocation Strategies

Antonio Melgar, José Manuel Rivas-Moscoso, J. F. Dynes +4 more

We demonstrate the coexistence of an O-band DV-QKD channel with 11.7 THz C+L-band transmission at a launch power of 22.4 dBm over 50 km of fiber. L-band channels do not degrade DV-QKD performance, and two C-band frequency allocation strategies are evaluated to optimize system performance.

Optical Fiber Communication Conference•Jan 1, 2026•0 citations

Coexistence of 11.2 TB/S carrier-grade classical channels and a DV-QKD channel over a 7-core multicore fibre

E. Hugues-Salas, Qibing Wang, Rui Wang +4 more

We successfully demonstrate coexistence of record-high 11.2 Tb/s (56x200Gb/s) classical channels with a discrete-variable-QKD channel over a multicore fibre. Continuous secret key generation is confirmed together with classical channel performance below the SDFEC limit and a minimum quantum channel spacing of 17nm in the C-band.

arXiv:1907.01459•European Conference on Optical Communication•Jan 1, 2019•2 citations

Field Trial of 7 × 89λ × 256 Gb/s C-Band Classical / CVQKD Co-Existence Transmission over 7-Core Fiber

Xin Wang, Jintao Wang, Yingyu Chen +5 more

We successfully demonstrated the coexistence of CV-QKD and 89 classical channels separated by 1 nm in C-band transmitted over a 16.7 km field deployed 7-core fiber, achieving 35 Mb/s secure key rate with 22.8 Tb/s classical data per core.

Asia Communications and Photonics Conference•Nov 4, 2023•16 citations

11.2 Tb/s Classical Channel Coexistence With DV-QKD Over a 7-Core Multicore Fiber

E. Hugues-Salas, Obada Alia, Rui Wang +4 more

The feasibility of transmitting discrete-variable quantum key distribution channels with carrier-grade classical optical channels over multicore fibers is experimentally explored in terms of achievable quantum bit error rates, secret key rates as well as classical signal bit error rates. A coexistence transmission record of 11.2 Tb/s is achieved for the classical channels simultaneously with a DV-QKD channel over a 1 km-long 7-core multicore fiber. Coexistence over the same multicore fiber core is identified as a dominant factor for the performance of the quantum channel requiring optical bandpass filtering of 17 nm for the quantum channel to avoid the effect of Raman noise. Also, counter-propagation of classical channels and quantum channels probe more tolerance to noise proliferation than co-propagation. In addition, the performance of the quantum channel is maintained when more than three cores are used for the classical channels. Furthermore, by adding a second DV-QKD channel in the multicore fiber, the simultaneous transmission of classical channels as well as the generation of quantum-secured keys of two QKD channels is achieved with an operational range of 10 dB of launched power into the MCF.

Journal of Lightwave Technology•May 27, 2020•53 citations

Demonstration of 17λ x 10 Gb/s C-Band Classical / DV-QKD Co-Existence Over Hollow-Core Fiber Link

Florian Honz, Florian Prawits, Obada Alia +11 more

We successfully integrate coherent one-way QKD at 1538 nm in a 7.7 km long hollow-core fiber link with 17 EDFA-boosted C-band data channels from 1540.56 to 1558.17 nm, aggregating a power of 11 dBm. QKD operation proves successful despite the wideband layout of classical channels.

arXiv:2210.00233•Oct 1, 2022•0 citations
The feasibility of transmitting discrete-variable quantum key distribution channels with carrier-grade classical optical channels over multicore fibers is experimentally explored in terms of achievable quantum bit error rates, secret key rates as well as classical signal bit error rates. A coexistence transmission record of 11.2 Tb/s is achieved for the classical channels simultaneously with a DV-QKD channel over a 1 km-long 7-core multicore fiber. Coexistence over the same multicore fiber core is identified as a dominant factor for the performance of the quantum channel requiring optical bandpass filtering of 17 nm for the quantum channel to avoid the effect of Raman noise. Also, counter-propagation of classical channels and quantum channels probe more tolerance to noise proliferation than co-propagation. In addition, the performance of the quantum channel is maintained when more than three cores are used for the classical channels. Furthermore, by adding a second DV-QKD channel in the multicore fiber, the simultaneous transmission of classical channels as well as the generation of quantum-secured keys of two QKD channels is achieved with an operational range of 10 dB of launched power into the MCF.