Linear SPAD array for quantum communication

Title

Linear SPAD array for quantum communication

Authors

A. Incoronato, F. Severini, F. Madonini, F. Villa, F. Zappa

Abstract 

Quantum communication is a fast-growing field that takes advantage of the quantum physics laws to protect and secure sensitive data. This work takes part of the European project UNIQORN (Affordable Quantum Communication for Everyone: Revolutionizing the Ecosystem from Fabrication to Application) whose aim is to develop a Quantum Systemon- Chip (QSoC) for telecom application. One components of the overall developed systems is an integrated circuit with photodetectors to enable the Quantum Random Number Generator (QRNG) block of the system, tailored to communicate with a non-linear optics circuit to be assembled onto it.

The integrated circuit, fabricated in a BCD 160 nm technology, consists of a 32×1 linear array based on Single-Photon Avalanche-Diode (SPAD) detectors for the generation of a raw random number, by revealing the position on the array of the single photon impinging on it. The linear array architecture consists of 32 pixels, with 125 μm pitch, each made by 4 SPADs with different diameter (5 μm, 10 μm, 20 μm, and 50 μm). Two operation modes are implemented: Single-Hit Mode (able to reveal the 5-bit position of the pixel triggered by a single photon, representing a pseudorandom number, in a time window synchronous with the laser emission) and Multi-Hit Mode (used to identify a coincidence of a given number of photons detected within a specified time window).

Venue

SPIE Optics + Optoelectronics, 2021

Place and date

Online, 19 – 23 April 2021

Posted by admin in scientific publications

Demonstration of a Dynamic QKD NetworkControl Using a QKD-Aware SDN ApplicationOver a Programmable Hardware Encryptor

Title

Demonstration of a Dynamic QKD NetworkControl Using a QKD-Aware SDN ApplicationOver a Programmable Hardware Encryptor

Authors

E. Arabul, R. S. Tessinari, O. Alia, E. Hugues-Salas, G. T. Kanellos, R. Nejabati, D. Simeonidou.

Abstract

We successfully implemented a QKD-Aware SDN application capable of realtime monitoring and controlling a quantum secure network paired with a programmable FPGA encryption/decryption technology to provide on-demand encryption algorithms for network services between different sites.

Venue

OFC 2021 – The Optical Networking and Communication Conference

Place and date

Hosted in San Francisco, United States, but virtual on 06 – 11 June 2021

Posted by admin in scientific publications

Experimental Demonstration of Programmable 100 Gb/s SDN-Enabled Encryptors/Decryptors for QKD Networks

Title

Experimental Demonstration of Programmable 100 Gb/s SDN-Enabled Encryptors/Decryptors for QKD Networks

Authors

E. Arabul, R. S. Tessinari, O. Alia, E. Hugues-Salas, G. T. Kanellos, R. Nejabati, D. Simeonidou.

Abstract

We successfully demonstrated on-demand and programmable encryption/decryption using SDN-enabled FPGA-based technology over a QKD network. Data rate over 90 Gb/s with maximum data encryption of 11.25 GB/s for different encryption schemes were achieved.

Venue

OFC 2021 – The Optical Networking and Communication Conference

Place and date

Hosted in San Francisco, United States, but virtual on 06 – 11 June 2021

Posted by admin in scientific publications

Towards Co-Existence of 100 Gbps Classical Channel Within a WDM Quantum Entanglement Network

Title

Towards Co-Existence of 100 Gbps Classical Channel Within a WDM Quantum Entanglement Network

Authors

R. S. Tessinari, O. Alia, S. K. Joshi, D. Aktas, M. Clark, E. Hugues-Salas, G. T. Kanellos, J. Rarity, R. Nejabati, D. Simeonidou.

Abstract

We experimentally prove the feasibility of wavelength multiplexing bright 100 Gbps classical communication with multiple single-photon level entanglement channels over SMF-28e fibre in a quantum network. This minimises the resources needed for quantum networks.

Venue

OFC 2021 – The Optical Networking and Communication Conference

Place and date

Hosted in San Francisco, United States, but virtual on 06 – 11 June 2021

Posted by admin in scientific publications

Wavelength Resources Management and Switching of Active Entanglement Distribution Circuits in Optical Networks

Title

Wavelength Resources Management and Switching of Active Entanglement Distribution Circuits in Optical Networks

Authors

O. Alia, R. S. Tessinari, E. Hugues-Salas, G. T. Kanellos, R. Nejabati, D. Simeonidou.

Abstract

We provide a formal definition of the entangled wavelength-pairs allocation problem using PDDL paired with a Fast-Forward planner and switching algorithm to optimize the resources of entanglement distribution circuits in optical networks.

Venue

OFC 2021 – The Optical Networking and Communication Conference

Place and Date

Hosted in San Francisco, United States, but virtual on 06 – 11 June 2021

Posted by admin in scientific publications

Quantum RNG Integration in an NG-PON2 Transceiver

Title

Quantum RNG Integration in an NG-PON2 Transceiver

Authors

N. Vokic, D. Milovancev, C. Pacher, M. Achleitner, H. Huebel and B. Schrenk

Abstract

We propose a minimally invasive optical overlay for time-interleaved QRNG operation in NG-PON2 transceivers. We experimentally demonstrate that random numbers can be generated at a 0.5 Gb/s rate and validate the randomness through statistical tests

Venue

OFC 2021 – The Optical Networking and Communication Conference

Place and Date

Hosted in San Francisco, United States, but virtual on 06 – 11 June 2021

Posted by admin in scientific publications

8th Annual Bristol Quantum Information Technologies Workshop

Date: 26 – 28 April 2021
Place: Online

The Virtual Bristol Quantum Information Technologies Workshop will return 26-28 April 2021 with a new programme of speakers bringing you everything you need to know about the emerging field of Quantum Technology.

This year a day of free tutorial sessions have been introduced so people can learn more about the academic talks at the School of Physics at University of Bristol.   

This is a virtual and completely free conference.

Visit the Workshop’s website to learn more on registration and abstract submission. 

Posted by admin in News

Online Workshop: TOWARDS A EUROPEAN STRATEGY ON QUANTUM PHOTONICS INTEGRATED CIRCUITS

Date: 01 March 2021
Place: online

UNIQORN will participate and showcase its results to the workshop “TOWARDS A EUROPEAN STRATEGY ON QUANTUM PHOTONICS INTEGRATED CIRCUITS” organised by the Focus Group formed by Photonics21 and the Quantum Flagship on Photonic Integration and Quantum Photonic Integrated Circuits (QPICs) .

The purpose of this workshop is twofold. First, to present and discuss the preliminary version of the position paper, which explains the required efforts in European level to gain technological leadership and stimulate job creation ,and further develop the general goals, and second, to bring together and showcase research projects from different funding initiativesworking on QPICs.

More information on the registration and the workshop agenda.

Posted by admin in News

VPIphotonics releases a new version of its simulation environment for classical and quantum communications

VPIphotonics announces a new release of its simulation and design tools VPIphotonics Design Suite™ 11.1 and VPItoolkit™ QKD 1.7. When used together, they represent a powerful R&D environment for the development of QKD systems based on weak-coherent prepare-and-measure protocols, including co-existence scenarios with classical channels. VPItoolkit™ QKD provides modules for both CV- and DV-QKD including transmitters and receivers, parameter estimation, and secret key rate calculation. The design environment can serve as a test bed for the development and evaluation of various implementation options of QKD systems and sub-systems, such as pulse shaping, signal recovery and filtering, and others. The toolkit offers capabilities for modeling a wide range of component imperfections by inheriting the versatile numerical approach of VPItransmissionMaker™ Optical Systems (part of VPIphotonics Design Suite™), including thermal noise, ADC quantization noise, RIN, phase noise, dark count rates, afterpulsing, dead time, etc. Also, exploiting the powerful model libraries coming with  VPItransmissionMaker™ Optical Systems, the toolkit allows to investigate various deteriorate effects such as Raman scattering and cross-talk from classical channels in co-existence scenarios. The in-build sweep and scripting functionality offers a convenient way to optimize simulation parameters such as modulation amplitude, photons per pulse, filter bandwidth, BB84 basis probability, symbol rate, and others. In summary, VPIphotonics Design Suite™ and VPItoolkit™ QKD are valuable design and optimization tools for researchers and engineers working in the area of quantum communications. The foundations for VPItoolkit™ QKD 1.7 have been laid in the Quantum Flagship project UNIQORN.

Links:
https://www.vpiphotonics.com/Tools/QKD/
https://www.vpiphotonics.com/Tools/OpticalSystems/

Posted by Agi Karyda in News, project deliverables