A compact two-dimensional grating coupler used as a polarization splitter

By D. Taillaert, Harold Chong, P. Borel, L. Frandsen, Richard M. De La Rue, R. Baets. IEEE Photonics Technology Letters, 2003

379 citations recorded by the source corpus.

We demonstrate a novel polarization splitter based on a two-dimensional grating etched in a silicon-on-insulator waveguide. The device couples orthogonal modes from a single-mode optical fiber into identical modes of two planar ridge waveguides. The extinction ratio is better than 18 dB in the wavelength range of 1530-1560 nm and the coupling efficiency is approximately 20%. The device is very compact and couples light only to transverse-electric modes of the planar waveguides. Therefore, it may be used in a polarization diversity configuration to implement a polarization insensitive photonic integrated circuit based on photonic crystal waveguides.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, Surfaces, Coatings and Films

View Paper: https://www.semanticscholar.org/paper/0369f22afcf6a3a6104dfc5fffd4bb05335d096f

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In Atomic and Molecular Physics, and Optics

In Electrical and Electronic Engineering

In Surfaces, Coatings and Films

Citations in the corpus

Photonic Packaging: Transforming Silicon Photonic Integrated Circuits into Photonic Devices (2016, neutral): “As a result, it is often necessary to implement some form of ‘polarization management’ to ensure stable Fiber‐to‐PIC coupling—either directly in the coupler‐element itself (as in the case of a 2D grating‐coupler [14]), or at a later stage in the PIC (such as a wave‐guide element that filte”
A compact silicon-on-insulator polarization splitter (2005, methodology): “splitter based on two-dimensional grating coupler etched in a 220-nm-thick SOI waveguide has also been realized [5].”
Compact and Highly Efficient Grating Couplers Between Optical Fiber and Nanophotonic Waveguides (2007, methodology): “A 2-D-grating version can be used for getting polarization independence through polarization diversity [7].”
A Grating-Coupler-Enabled CMOS Photonics Platform (2011, methodology): “2) Polarization Dependence: It is essential that the PSGC loss remains largely independent of the polarization of the in- coming light.”
Silicon photonic integration in telecommunications (2015, background): “The fourth is a 2D grating coupler [13].”
Wide Bandwidth Silicon Nitride Grating Coupler (2010, background): “The grating coupler can perform other functions, as well, such as polarization splitting [2] and wavelength demultiplexing [3], [4].”
Low-Loss ($<$ 1 dB) and Polarization-Insensitive Edge Fiber Couplers Fabricated on 200-mm Silicon-on-Insulator Wafers (2010, methodology): “To overcome this polarization dependence, a two-dimensional (2-D) approach has been proposed [ 5 ].”
Silicon Photonic Integrated Circuits for Wavelength-Division Multiplexing Applications (2016, methodology): “Alternatively, one can use a 2-D grating to couple the light from a fiber to a silicon photonic chip [57].”
Silicon Quantum Photonics (2015, background): “Polarizationsplitting two-dimensional grating couplers [119] are an appealing solution for converting path-encoded qubits (stable on a monolithic chip, but not in fibre) to polarisation-encoded qubits (better suited for short fibre and free-space links).”
Planar Concave Grating Demultiplexer Fabricated on a Nanophotonic Silicon-on-Insulator Platform (2007, neutral): “If needed, a polarization diversity configuration can be implemented to obtain polarization—insensitive photonic integrated circuits [17].”