Open AccessSilicon nitride three-mode division multiplexing and wavelength-division multiplexing using asymmetrical directional couplers and microring resonators
Author(s) -
Yue-De Yang,
Yu Liu,
Yong-Zhen Huang,
Andrew Poon
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.022172
Subject(s) - multiplexing , multiplexer , optics , power dividers and directional couplers , wavelength division multiplexing , resonator , extinction ratio , time division multiplexing , coupled mode theory , crosstalk , physics , polarization division multiplexing , optoelectronics , wavelength , telecommunications , refractive index , computer science
We demonstrate silicon nitride mode-division multiplexing (MDM) and wavelength-division multiplexing (WDM) using asymmetrical directional couplers and microring resonators. Our experiments reveal three-mode multiplexing and demultiplexing. We demonstrate 30Gb/s open eye diagrams with an extinction ratio of ~9 dB for each of the three modes. We observe the worst-case modal crosstalk of ~-10 dB. Our analysis of the measured transmission spectra suggests three contributions to the observed crosstalks, with the dominant cause being a compromised input-coupling at the directional couplers in the multiplexer.