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Proceedings Paper

Design of photonic crystal splitters/combiners
Author(s): Sangin Kim; Ikmo Park; Hanjo Lim
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Paper Abstract

Photonic band gap (PBG) structures or photonic crystals have attracted a lot of interest since one of their promising applications is to build compact photonic integrated circuits (PIC). One of key components in PICs is a 1 x 2 optical power splitter or a 2 x 1 combiner. Design of 1 x 2 optical power splitters based on photonic crystal has been investigated by several research groups, but no attention has been paid to the design of 2 x 1 optical combiners. In conventional dielectric waveguide based circuits, optical combiners are obtained just by operating the splitters in the opposite direction and the isolation between two input ports in the combiners is naturally achieved. In photonic crystal based circuits, however, we have found that reciprocal operation of the splitters as combiners will not provide proper isolation between the input ports of the combiners. In this work, microwave-circuit concept has been adopted to obtain isolation between two input ports of the combiner and compact optical power splitters/combiners of good performance have been designed using 2-D photonic crystal. Numerical analysis of the designed splitters/combiners has been performed with the finite-difference time-domain method. The designed splitters/combiners show good isolation between input ports in combiner operation with small return losses.

Paper Details

Date Published: 25 October 2004
PDF: 7 pages
Proc. SPIE 5597, Nanophotonics for Communication: Materials and Devices, (25 October 2004); doi: 10.1117/12.571237
Show Author Affiliations
Sangin Kim, Ajou Univ. (South Korea)
Ikmo Park, Ajou Univ. (South Korea)
Hanjo Lim, Ajou Univ. (South Korea)

Published in SPIE Proceedings Vol. 5597:
Nanophotonics for Communication: Materials and Devices
Michal F. Lipson; George Barbastathis; Achyut K. Dutta; Kiyoshi Asakawa, Editor(s)

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