Open AccessAdjoint-method-inspired grating couplers for CWDM O-band applications
Author(s) -
Peng Sun,
Thomas Van Vaerenbergh,
Marco Fiorentino,
Raymond G. Beausoleil
Publication year - 2020
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.382986
Subject(s) - grating , optics , bandwidth (computing) , silicon on insulator , wavelength division multiplexing , fiber bragg grating , materials science , wafer , diffraction grating , optoelectronics , optical fiber , physics , silicon , computer science , telecommunications , wavelength
We have designed a grating coupler on Silicon-on-Insulator (SOI) platform that has sufficient bandwidth to cover the entire CWDM O-band from 1270 nm to 1330 nm. The grating architecture is inspired by adjoint method-based geometry optimization, and then parameterized to accommodate DOE construction for tapeouts at commercial CMOS foundries and wafer-level testing on fiber probe stations. One grating design achieved peak loss of 3.2 dB with 1-dB bandwidth spanning from 1265 nm to 1338 nm in simulations.