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Proceedings Paper

Design and applications of silicon waveguide grating couplers
Author(s): Xia Chen; Zhenzhou Cheng; Christy K. Y. Fung; Hon K. Tsang
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Paper 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.

Paper Details

Date Published: 2 February 2012
PDF: 10 pages
Proc. SPIE 8266, Silicon Photonics VII, 82660I (2 February 2012); doi: 10.1117/12.907947
Show Author Affiliations
Xia Chen, The Chinese Univ. of Hong Kong (Hong Kong, China)
Univ. of Surrey (United Kingdom)
Zhenzhou Cheng, The Chinese Univ. of Hong Kong (Hong Kong, China)
Christy K. Y. Fung, The Chinese Univ. of Hong Kong (Hong Kong, China)
Hon K. Tsang, The Chinese Univ. of Hong Kong (Hong Kong, China)

Published in SPIE Proceedings Vol. 8266:
Silicon Photonics VII
Joel Kubby; Graham Trevor Reed, Editor(s)

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