Operation of an Electrical-Only-Contact Photonic Integrated Chip for Quantum Random Number Generation Using Laser Gain-Switching

Author:

Ó Dúill Seán1ORCID,Rodriguez Leidy1,Alvarez-Outerelo David2,Diaz-Otero Francisco2,Sharma Ankit3,Smyth Frank3,Barry Liam1

Affiliation:

1. Radio and Optics Research Laboratory, School of Electronic Engineering, Dublin City University, Glasnevin, D09 V209 Dublin, Ireland

2. AttlanTTic Research Center, University of Vigo, EI Telecommunication, 36310 Vigo, Spain

3. Pilot Photonics Ltd., Invent Building, Dublin City University, Glasnevin, D09 V209 Dublin, Ireland

Abstract

We present the results of the detected voltage distribution of a quantum random number generator (QRNG) based on a photonic integrated circuit comprising a semiconductor laser, delay interferometer and photodetector. We find that the integrated QRNG system behaves as expected for a QRNG from discrete gain-switched laser sources, especially exhibiting all of the peculiarities of the random voltage distribution and behaving as previously demonstrated for a discrete optical component setup. The biggest advantage of having all of the components integrated into a single chip is that only electrical connections are needed to operate the system, without the need for tricky and expensive optical alignment to external circuitry. We supply results showing that a random bit stream created from the random numbers passes the NIST statistical test suite tests, thus demonstrating the feasibility to generate random numbers via quantum means at gigabit/s rates from a single photonic integrated circuit. All of our results are backed by numerical simulations.

Funder

Science Foundation Ireland

EU Horizon 2020

Publisher

MDPI AG

Subject

General Medicine

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