Programmable wavelength filter with double ring loaded MZI

We propose a novel filter circuit that incorporates a double ring resonator with a balanced Mach–Zehnder interferometer (MZI). The circuit has a response equivalent to a conventional ring loaded MZI filter, but with added flexibility in terms of configurability. The second-order filter can also be c...

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Bibliographic Details
Published inScientific reports Vol. 12; no. 1; p. 1482
Main Authors Wang, Mi, Chen, Xiangfeng, Khan, Umar, Bogaerts, Wim
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 27.01.2022
Nature Publishing Group
Nature Portfolio
Subjects
639/624/1075/1079
639/624/399/1099
Humanities and Social Sciences
multidisciplinary
Optimization
Science
Science (multidisciplinary)
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Summary:We propose a novel filter circuit that incorporates a double ring resonator with a balanced Mach–Zehnder interferometer (MZI). The circuit has a response equivalent to a conventional ring loaded MZI filter, but with added flexibility in terms of configurability. The second-order filter can also be cascaded to realize higher-order filters. The circuit incorporates a two-stage input and output coupler to further reduce the effect of dispersion. A combination of local and global optimization strategies to program the filter, using tailored objective functions, have been tested in simulation and experiments. To our best knowledge, this is the first time a global optimization strategy is directly used in ARMA filter synthesis and simulation without any additional requirement. We further extend the optimization strategy into experiments and demonstrated its use in practical case for programmable filter circuits.
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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-04598-6