Open AccessSilicon nitride Mach-Zehnder interferometer for on-chip quantum random number generation
Author(s) -
A. Prokhodtsov,
Vadim Kovalyuk,
Pavel An,
Alexander Golikov,
Roman Shakhovoy,
Violetta Sharoglazova,
Alexander Udaltsov,
Y. V. Kurochkin,
Gregory Goltsman
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1695/1/012118
Subject(s) - interferometry , mach–zehnder interferometer , silicon nitride , optics , power dividers and directional couplers , physics , optoelectronics , extinction ratio , wavelength , silicon chip , materials science , silicon
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.