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Title

Compact, low-threshold squeezed light source

Authors

J. Arnbark, C. S. Jacobsen, R. B. Andrade, X. Guo, J. S. Neergaard-Nielsen, U. L. Andersen, T. Gehring

Abstract

Strongly squeezed light finds many important applications within the fields of
quantum metrology, quantum communication and quantum computation. However, due to the
bulkiness and complexity of most squeezed light sources of today, they are still not a standard tool
in quantum optics labs. We have taken the first steps in realizing a compact, high-performance
1550 nm squeezing source based on commercially available fiber components combined with
a free-space double-resonant parametric down-conversion source. The whole setup, including
single-pass second-harmonic generation in a waveguide, fits on a 30 cm×45 cm breadboard and
produces 9.3 dB of squeezing at a 5 MHz sideband-frequency. The setup is currently limited
by phase noise, but further optimization and development should allow for a 19″ sized turn-key
squeezing source capable of delivering more than 10 dB of squeezing.

Venue

Optics Express, vol 27

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Title

End-to-End Quantum Secured Inter-Domain 5G Service Orchestration Over Dynamically Switched Flex-Grid Optical Networks Enabled by a q-ROADM

Authors

Rui Wang, Rodrigo Stange Tessinari, Emilio Hugues Salas, Anderson Bravalheri, Navdeep Uniyal, Abubakar Muqaddas, Rafael Silva Guimaraes, Thierno Diallo, Shadi Moazzeni, Qibing Wang, George Kanellos, Reza Nejabati, Dimitra Simeonidou

Abstract

Dynamic and flexible optical networking enabled by NFV and SDN are the key technology enablers for supporting the dynamicity and bandwidth requirements of emerging 5G network services. To achieve the objective of 5G, Network Services (NSes) must be often deployed transparently over multiple administrative and technological domains. Such case often presents security risks since a typical NS may comprise a chain of network functions, each executed in different remote locations, and tampering within the network infrastructure may compromise their communication. To avoid such threats, QKD has been identified and proposed as a future-proof method immune to any algorithmic cryptanalysis based on quantum-physics mechanisms. The maturity of QKD has enabled the R&D of quantum networks coexisting with optical networks using telecom equipment. This makes the QKD a suitable candidate for the security of distributed and virtualised network services.
In this paper, for the first time, we propose a dynamic quantum-secured optical network for supporting network services that are dynamically created by chaining VNF over multiple network domains. This work includes a new quantum-ROADM, extensions to SDN-enabled optical control plane, and extensions to NFV orchestration to achieve quantum-aware, on-demand chaining of VNFs. The experimental results verify the capability of routing quantum and classical data channels both individually and dynamically over shared fibre links. Moreover, quantum secured chaining of VNFs in 5G networks is experimentally demonstrated via interconnecting four autonomous 5G islands simultaneously through the q-ROADM with eight optical channels using the 5GUK Exchange orchestration platform. The experimental scenarios and results confirm the benefit of the proposed data plane architecture and control/management plane framework.

Venue

Journal of Lightwave Technology (Invited), vol. 38, no. 1, pp. 139-149, 1 Jan.1, 2020

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Title

Coexistence of 11.2Tb/s Carrier-Grade Classical Channels and a DV-QKD Channel over a 7-Core Multicore Fibre

Authors

Emilio Hugues-Salas, Qibing Wang, Rui Wang, Kalyani Rajkumar, George T. Kanellos, Reza Nejabati, Dimitra Simeonidou

Abstract

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.

Venue

European Conference on Optical Communication (ECOC),

Place and Date

Dublin, Ireland, 22 – 26 September 2019, Dublin

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Title

Field Trial of Dynamic DV-QKD Networking in the SDNControlled Fully-Meshed Optical Metro Network of the Bristol City 5GUK Test Network

Authors

R. S. Tessinari, A. Bravalheri, E. Hugues-Salas, R. Collins, D. Aktas, R.S. Guimaraes, O. Alia, J. Rarity, G. T. Kanellos, R. Nejabati, and D. Simeonidou

Abstract

We demonstrate for the first time a field trial of a fully meshed metro network with dynamic QKD networking capabilities across four optical network nodes in the 5GUK Test Network, where the DV-QKD quantum channels co-exist with classical channels and are dynamically switched and rerouted utilising QKD-aware SDN control.

Venue

European Conference on Optical Communications (ECOC’19). Post-deadline Paper PD3.6

Place and Date

Dublin, Ireland. September, 2019. 

Title

A platform approach towards hybrid photonic integration and assembly for communications, sensing, and quantum technologies based on a polymer waveguide technology

Authors

Moritz Kleinert, Madeleine Nuck, Hauke Conradi, David de Felipe, Martin Kresse, Walter Brinker, Crispin Zawadzki, Norbert Keil, Martin Schell

Abstract

We present functionalities of photonic integrated circuits and a generic assembly approach for their hybrid integration with other components in the polymer waveguide platform PolyBoard. In addition to standard integrated optics capabilities, the PolyBoard approach allows for the realization of flexible interconnects, the fabrication of multilayer waveguide structures with low intra-layer coupling losses, and the integration of bulk optical crystals in on-chip free-space sections. These functionalities enable PICs with applications ranging from communications, via sensing, to quantum technology. The semiautomated assembly process presented in the second part of this paper ensures the compatibility of all individual functionalities and the scalability of the developed approaches towards production.

Venue

2019 IEEE CPMT Symposium Japan (ICSJ)

Place and Date

Kyoto, Japan, 18-20 November 2019

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