NDLI: Low reflection double stage coupling to slow light waveguides

Content Provider	IEEE Xplore Digital Library
Author	Petrov, A.Yu. Hampe, J. Eich, M.
Copyright Year	2008
Description	Author affiliation: Hamburg Univ. of Technol., Hamburg (Petrov, A.Yu.; Hampe, J.; Eich, M.)
Abstract	Photonic crystal line-defect waveguides can guide optical modes with substantially reduced group velocity. Efficient coupling to slow light waveguides from silicon strip waveguides can be achieved through double stage mode conversion. First, light is coupled to a normal group velocity line-defect waveguide with anti-reflection adjustment of the photonic crystal interface. The reflected intensity at the first stage was reduced to -35 dB in this paper. Second stage consists of the abrupt change to slow light waveguide with intensity reflection about -20 dB for the mode with group velocity 0.02 c. The reflection at the second stage can be further reduced with adiabatic coupling. A gradual tapering 20 lattice constants long with a cubic taper function leads to less than -40 dB intensity reflection for the investigated mode.
Starting Page	131
Ending Page	133
File Size	343909
Page Count	3
File Format	PDF
ISBN	9781424417698
DOI	10.1109/GROUP4.2008.4638121
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-09-17
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical waveguides Reflection Photonic crystals Couplings Electromagnetic waveguides Optimized production technology Dielectrics
Content Type	Text
Resource Type	Article

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