Proposal for a Grating Waveguide Serving as Both a Polarization Splitter and an Efficient Coupler for Silicon-on-Insulator Nanophotonic Circuits
- 6 January 2009
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 21 (4) , 242-244
- https://doi.org/10.1109/lpt.2008.2010528
Abstract
A grating waveguide is introduced and designed to serve as both a polarization splitter and an efficient vertical coupler between a fiber and a silicon-on-insulator (SOI) nanophotonic waveguide. Through this grating waveguide, the light from the fiber can be efficiently coupled into an SOI chip where the two orthogonally polarized waves are separated to travel towards the opposite directions along the waveguide. According to our simulations, the optimized structure can give a high coupling efficiency of about 50% for both polarizations, as well as a large bandwidth of over 70 nm and a very low polarization crosstalk below -22 dB at the output ports.Keywords
This publication has 12 references indexed in Scilit:
- Silicon photonic circuit with polarization diversityOptics Express, 2008
- Compact and Highly Efficient Grating Couplers Between Optical Fiber and Nanophotonic WaveguidesJournal of Lightwave Technology, 2007
- A polarization-diversity wavelength duplexer circuit in silicon-on-insulator photonic wiresOptics Express, 2007
- Silicon-on-insulator ultra-compact duplexer based on a diffractive grating structureOptics Express, 2007
- Polarization-transparent microphotonic devices in the strong confinement limitNature Photonics, 2006
- Compact efficient broadband grating coupler for silicon-on-insulator waveguidesOptics Letters, 2004
- A compact two-dimensional grating coupler used as a polarization splitterIEEE Photonics Technology Letters, 2003
- Nanotaper for compact mode conversionOptics Letters, 2003
- Optical modelling of photonic crystals and VCSELs using eigenmode expansion and perfectly matched layersOptical and Quantum Electronics, 2001
- Buried-oxide silicon-on-insulator structures. II. Waveguide grating couplersIEEE Journal of Quantum Electronics, 1992