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Generation of random numbers by measuring phase fluctuations from a laser diode with a silicon-on-insulator chip

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)19730-19741
Number of pages12
JournalOptics Express
Issue number16
Early online date23 Jul 2018
DateIn preparation - 13 Apr 2018
DateAccepted/In press - 12 Jun 2018
DateE-pub ahead of print - 23 Jul 2018
DatePublished (current) - 6 Aug 2018


Random numbers are a fundamental resource in science and technology. Among the different approaches to generating them, random numbers created by exploiting the laws of quantum mechanics have proven to be reliable and can be produced at enough rates for their practical use. While these demonstrations have shown very good performance, most of the implementations using free-space and fibre optics suffer from limitations due to their size, which strongly limits their practical use. Here we report a quantum random number generator based on phase fluctuations from a diode laser, where the other required optical components are integrated on a mm-scale monolithic silicon-on-insulator chip. The post-processing reported in this experiment is performed via software. However, our physical device shows the potential of operation at generation rates in the Gbps regime. Considering the device’s size, its simple, robust and low power operation, and the rapid industrial uptake of silicon photonics, we foresee the widespread integration of the reported design in more complex systems.

    Research areas

  • ntegrated optics devices, Quantum communications, Quantum information and processing

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