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