A general design algorithm for low optical loss adiabatic connections in waveguides

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Single-mode waveguide designs frequently support higher order transverse modes, usually as a consequence of process limitations such as lithography. In these systems, it is important to minimize coupling to higher-order modes so that the system nonetheless behaves single mode. We propose a variational approach to design adiabatic waveguide connections with minimal intermodal coupling. An application of this algorithm in designing the "S-bend" of a whispering-gallery spiral waveguide is demonstrated with approximately 0.05dB insertion loss. Compared to other approaches, our algorithm requires less fabrication resolution and is able to minimize the transition loss over a broadband spectrum. The method can be applied to a wide range of turns and connections and has the advantage of handling connections with arbitrary boundary conditions.
Publisher
OPTICAL SOC AMER
Issue Date
2012-09
Language
English
Article Type
Article
Keywords

PROPAGATION LOSS; WAVEGUIDES; RESONATOR; FIBER

Citation

OPTICS EXPRESS, v.20, no.20, pp.22819 - 22829

ISSN
1094-4087
DOI
10.1364/OE.20.022819
URI
http://hdl.handle.net/10203/198982
Appears in Collection
NT-Journal Papers(저널논문)
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