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Optics Express

Optics Express

  • Vol. 16, Iss. 16 — Aug. 4, 2008
  • pp: 11682–11690

Impedance matching vertical optical waveguide couplers for dense high index contrast circuits

Rong Sun, Mark Beals, Andrew Pomerene, Jing Cheng, Ching-yin Hong, Lionel Kimerling, and Jurgen Michel  »View Author Affiliations

Optics Express, Vol. 16, Issue 16, pp. 11682-11690 (2008)

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We designed and demonstrated a compact, high-index contrast (HIC) vertical waveguide coupler for TE single mode operation with the lowest coupling loss of 0.20 dB ± 0.05 dB at 1550 nm. Our vertical coupler consists of a pair of vertically overlapping inverse taper structures made of SOI and amorphous silicon. The vertical coupler can suppress power oscillation observed in regular directional couplers and guarantees vertical optical impedance matching with great tolerance for fabrication and refractive index variations of the waveguide materials. The coupler furthermore shows excellent broadband coupling efficiencies between 1460 nm and 1570 nm.

© 2008 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(230.7380) Optical devices : Waveguides, channeled

ToC Category:
Integrated Optics

Original Manuscript: May 13, 2008
Revised Manuscript: July 2, 2008
Manuscript Accepted: July 4, 2008
Published: July 21, 2008

Rong Sun, Mark Beals, Andrew Pomerene, Jing Cheng, Ching-yin Hong, Lionel Kimerling, and Jurgen Michel, "Impedance matching vertical optical waveguide couplers for dense high index contrast circuits," Opt. Express 16, 11682-11690 (2008)

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