Add–drop filter with complex waveguide Bragg grating and multimode interferometer operating on arbitrarily spaced channels
Author(s) -
Shengjie Xie,
Jiahao Zhan,
Yiwen Hu,
Yang Zhang,
Sylvain Veilleux,
Joss BlandHawthorn,
M. Dagenais
Publication year - 2018
Publication title -
optics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.43.006045
Subject(s) - optics , fiber bragg grating , interferometry , multi mode optical fiber , waveguide , diffraction grating , materials science , astronomical interferometer , filter (signal processing) , grating , physics , optical fiber , computer science , computer vision
We present a silicon nitride/silicon dioxide add-drop filter operating on arbitrarily spaced channels using multimode interferometers (MMIs) and complex waveguide Bragg gratings (CWBGs). The add-drop filter shows a rejection ratio of >40 dB on all five channels, with a line width of 1.2 nm and an on-chip loss of <1 dB. By designing the CWBG with the Layer Peeling/Layer Adding algorithm, this MMI-CWBG add-drop filter platform has the capability for ultrabroadband add-drop operation on arbitrarily spaced channels.
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