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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 20, Iss. 3 — Mar. 1, 2003
  • pp: 417–423

Add–drop filter based on apodized surface-corrugated gratings

Dorothea Wiesmann, Roland Germann, Gian-Luca Bona, Christian David, Daniel Erni, and Heinz Jäckel  »View Author Affiliations


JOSA B, Vol. 20, Issue 3, pp. 417-423 (2003)
http://dx.doi.org/10.1364/JOSAB.20.000417


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Abstract

We report on the fabrication of a grating-based add–drop filter in SiON planar waveguide technology. We achieved apodization of the Bragg grating by concatenating subgratings with various duty cycles. We present the theoretical and experimental dependence of the coupling coefficient on the duty cycle, which leads to a minimum coupling coefficient of 30%. With a breeder genetic algorithm we were able to find optimal apodization profiles within this limited coupling coefficient range. The final device is compatible with a 100-GHz channel spacing and has a bandwidth utilization factor of 36%.

© 2003 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(050.2770) Diffraction and gratings : Gratings
(060.4230) Fiber optics and optical communications : Multiplexing
(130.0130) Integrated optics : Integrated optics
(130.3120) Integrated optics : Integrated optics devices
(230.1480) Optical devices : Bragg reflectors
(230.7390) Optical devices : Waveguides, planar

Citation
Dorothea Wiesmann, Roland Germann, Gian-Luca Bona, Christian David, Daniel Erni, and Heinz Jäckel, "Add–drop filter based on apodized surface-corrugated gratings," J. Opt. Soc. Am. B 20, 417-423 (2003)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-20-3-417

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