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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 9 — May. 5, 2014
  • pp: 10938–10947

Wide bandwidth and high coupling efficiency Si3N4-on-SOI dual-level grating coupler

Wesley D. Sacher, Ying Huang, Liang Ding, Benjamin J. F. Taylor, Hasitha Jayatilleka, Guo-Qiang Lo, and Joyce K. S. Poon  »View Author Affiliations


Optics Express, Vol. 22, Issue 9, pp. 10938-10947 (2014)
http://dx.doi.org/10.1364/OE.22.010938


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Abstract

We propose and experimentally demonstrate fiber-to-chip grating couplers with aligned silicon nitride (Si3N4) and silicon (Si) grating teeth for wide bandwidths and high coupling efficiencies without the use of bottom reflectors. The measured 1-dB bandwidth is a record 80 nm, and the measured peak coupling efficiency is −1.3 dB, which is competitive with the best Si-only grating couplers. The grating couplers are integrated in a Si3N4 on silicon-on-insulator (SOI) integrated optics platform with aligned waveguides in both the Si3N4 and Si, and we demonstrate a 1 × 4 tunable multiplexer/demultiplexer using the Si3N4-on-SOI dual-level grating couplers and thermally-tuned Si microring resonators.

© 2014 Optical Society of America

OCIS Codes
(130.0130) Integrated optics : Integrated optics
(130.3120) Integrated optics : Integrated optics devices

ToC Category:
Integrated Optics

History
Original Manuscript: March 19, 2014
Revised Manuscript: April 20, 2014
Manuscript Accepted: April 22, 2014
Published: April 29, 2014

Citation
Wesley D. Sacher, Ying Huang, Liang Ding, Benjamin J. F. Taylor, Hasitha Jayatilleka, Guo-Qiang Lo, and Joyce K. S. Poon, "Wide bandwidth and high coupling efficiency Si3N4-on-SOI dual-level grating coupler," Opt. Express 22, 10938-10947 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-9-10938


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