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Silicon nitride Mach-Zehnder interferometer for on-chip quantum random number generation

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, , Citation A Prokhodtsov et al 2020 J. Phys.: Conf. Ser. 1695 012118 DOI 10.1088/1742-6596/1695/1/012118

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Author affiliations

1 National Research University Higher School of Economics, Moscow 101000, Russia

2 Department of Physics, Moscow State Pedagogical University, 119992, Russia

3 Zavoisky Physical-Technical Institute of the Russian Academy of Sciences, 420029, Russia

4 Moscow Institute of Physics and Technology (State University), 141700, Russia

5 Russian Quantum Center, 45 Skolkovskoye shosse, Moscow, Russia

6 QRate, 100 Novaya str., Skolkovo, Russia

7 NTI Center for Quantum Communications, National University of Science and Technology MISiS, 4 Leninsky prospekt, Moscow, Russia

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1742-6596/1695/1/012118

Abstract

In this work, we experimentally studied silicon nitride Mach-Zehnder interferometer (MZI) with two directional couplers and 400 ps optical delay line for telecom wavelength 1550 nm. We achieved the extinction ratio in a range of 0.76-13.86 dB and system coupling losses of 28-44 dB, depending on the parameters of directional couplers. The developed interferometer is promising for the use in a compact random number generator for the needs of a fully integrated quantum cryptography system, where compact design, as well as high generation speed, are needed.

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10.1088/1742-6596/1695/1/012118