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Proceedings Paper

Silicon photonic Bragg-grating couplers for optical communications
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Paper Abstract

We discuss recent progress and challenges in realizing Bragg-grating devices on the submicron silicon-on-insulator platform for next-generation optical communications applications, such as on-chip optical interconnects and signal processing. In particular, we focus on grating-assisted, wavelength-selective couplers, known as contra-directional couplers (contra-DCs). In contrast to conventional two-port Bragg gratings operating in the reection mode, contra-DCs are four-port devices with very weak backreections and, therefore, can be easily integrated with other photonic components on a chip. In order to provide a reliable on-chip wavelength-division multiplexing (WDM) solution for high-speed optical interconnects, we have developed high-performance add-drop filters and, furthermore, wavelength multiplexers/demultiplexers with combined advantages of at-top responses, low insertion loss (< 1 dB), and low crosstalk (< -23 dB). These WDM devices are ultra-compact and highly tolerant to temperature uctuations (up to ±50 °C), showing great potential for large-scale integration and low-power consumption. We further discuss a novel four-port Bragg photonic resonator for high-speed, low-power optical switching. Using a coupler-chirped design with uniform Bragg gratings, we have recently achieved an on-chip, continuously tunable photonic delay line with low insertion loss. These system-orientated devices indicate great potential for large-scale integration of Bragg-grating-defined functions using CMOS-compatible silicon photonics technology.

Paper Details

Date Published: 25 February 2014
PDF: 12 pages
Proc. SPIE 9010, Next-Generation Optical Networks for Data Centers and Short-Reach Links, 90100F (25 February 2014); doi: 10.1117/12.2044096
Show Author Affiliations
Wei Shi, Univ. Laval (Canada)
Venkat Veerasubramanian, McGill Univ. (Canada)
David V. Plant, McGill Univ. (Canada)
Nicolas A. F. Jaeger, The Univ. of British Columbia (Canada)
Lukas Chrostowski, The Univ. of British Columbia (Canada)

Published in SPIE Proceedings Vol. 9010:
Next-Generation Optical Networks for Data Centers and Short-Reach Links
Atul K. Srivastava, Editor(s)

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