Open AccessBroadband silicon photonic directional coupler using asymmetric-waveguide based phase control
Author(s) -
Lu Zheng,
Han Yun,
Yun Wang,
Zhitian Chen,
Fan Zhang,
Nicolas A. F. Jaeger,
Lukas Chrostowski
Publication year - 2015
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.23.003795
Subject(s) - power dividers and directional couplers , optics , broadband , transverse mode , silicon on insulator , waveguide , transverse plane , materials science , optoelectronics , silicon , silicon photonics , photonic integrated circuit , photonics , physics , laser , structural engineering , engineering
We design and demonstrate broadband directional couplers that use asymmetric-waveguide based phase control sections, on the silicon-on-insulator platform. Broadband directional couplers with various power splitting ratios, including 10%/90%, 20%/80%, 30%/70%, 40%/60% and 50%/50%, were realized for both transverse electric (TE) and transverse magnetic (TM) modes. Some of the devices exhitbit bandwidths in excess of 100 nm, and all in excess of 75 nm. The footprints of the TE mode couplers are 32 μm ×1.3 μm, or less, and those of the TM mode couplers are 13 μm ×1.3 μm, or less.