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Grating assisted waveguide-to-waveguide couplers

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2 Author(s)
Tao Liang ; Electromagnetics Lab., Arizona Univ., Tucson, AZ, USA ; R. W. Ziolkowski

A new radiation-type waveguide-to-waveguide coupler is proposed. The coupling is realized through gratings embedded on the dielectric waveguides involved. Compared to the conventional hybrid-mode coupler, this type of coupler has advantages in that the two waveguides can be quite dissimilar as well as being separated by large distances. It is demonstrated that the coupling performance of this radiation-type coupler can be enhanced significantly by using photonic bandgap (PBG) structures.

Published in:

IEEE Photonics Technology Letters  (Volume:10 ,  Issue: 5 )