Design and applications of silicon waveguide grating couplers

Xia Chen; Zhenzhou Cheng; Christy K. Y. Fung; Hon K. Tsang

doi:10.1117/12.907947

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2 February 2012 Design and applications of silicon waveguide grating couplers

Xia Chen, Zhenzhou Cheng, Christy K. Y. Fung, Hon K. Tsang

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Proceedings Volume 8266, Silicon Photonics VII; 82660I (2012) https://doi.org/10.1117/12.907947
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

We review our recent work on waveguide grating couplers, including an apodized grating coupler with engineered coupling strength to achieve Gaussian-like output profile, which greatly improves the fiber-chip coupling efficiency. We will also discuss a new class of grating couplers involving the use of sub-wavelength nanostructures to engineer the optical properties. Effective medium theory can be used in the design of sub-wavelength structures, which, when properly engineered, can offer broadband coupling and polarization independence. Other applications of waveguide gratings, for example bi-wavelength two dimensional gratings coupler for (de-)multiplexing two different wavelengths, fiber-waveguide hybrid lasers and mid-infrared grating couplers on silicon-on-sapphire wafer will also be briefly discussed.

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Xia Chen, Zhenzhou Cheng, Christy K. Y. Fung, and Hon K. Tsang "Design and applications of silicon waveguide grating couplers", Proc. SPIE 8266, Silicon Photonics VII, 82660I (2 February 2012); https://doi.org/10.1117/12.907947

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