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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 10 — Apr. 1, 2010
  • pp: 1972–1978

Efficient coupling of narrow beams into polyimide waveguides by means of grating couplers with high-index coating

Roman Bruck and Rainer Hainberger  »View Author Affiliations


Applied Optics, Vol. 49, Issue 10, pp. 1972-1978 (2010)
http://dx.doi.org/10.1364/AO.49.001972


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Abstract

The effect of a thin high-index coating deposited on polyimide waveguide grating couplers was investigated. A comprehensive numerical study was performed using an efficient simulation tool based on a Floquet–Bloch algorithm, and the results of this study were compared with experimentally obtained values for input coupling efficiencies. The application of a high-index coating permits efficient coupling from narrow beams even in material systems with a low index difference. This not only facilitates a denser integration of grating couplers but also permits low-loss lateral tapering to single-mode waveguides.

© 2010 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(130.3120) Integrated optics : Integrated optics devices
(230.7390) Optical devices : Waveguides, planar
(130.5460) Integrated optics : Polymer waveguides

ToC Category:
Diffraction and Gratings

History
Original Manuscript: November 13, 2009
Revised Manuscript: March 10, 2010
Manuscript Accepted: March 11, 2010
Published: March 30, 2010

Citation
Roman Bruck and Rainer Hainberger, "Efficient coupling of narrow beams into polyimide waveguides by means of grating couplers with high-index coating," Appl. Opt. 49, 1972-1978 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-10-1972


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