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

Autor: Seán Ó Dúill, Leidy Rodriguez, David Alvarez-Outerelo, Francisco J. Diaz-Otero, Ankit Sharma, Frank Smyth, Liam P. Barry
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Optics, Vol 4, Iss 4, Pp 551-562 (2023)
Druh dokumentu: article
ISSN: 2673-3269
DOI: 10.3390/opt4040040
Popis: 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.
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