Open AccessAdd–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 Bland-Hawthorn,
M. Dagenais
Publication year - 2018
Publication title -
optics letters/optics index
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 , materials science , diffraction grating , filter (signal processing) , optical filter , optical circulator , 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.